# Arizona Electrical Solutions, LLC > Full-service commercial design-build contractor based in Tucson, Arizona, that also performs the permitted residential jobs a Tucson home needs a licensed contractor for: electrical panel/service upgrades, EV charger installation, AC/heat-pump replacement, casita and addition electrical, rewiring, and standby generators. We self-perform electrical, electrical engineering, HVAC/mechanical, underground utilities with heavy equipment, and general construction under a single design-build contract. Licensed (Arizona ROC KB-1, KA, CR-11, CR-39), bonded, and insured. We serve commercial, industrial, institutional, municipal/public, and mixed-use clients statewide, and Tucson-area homeowners for permitted, inspected residential work: panel and service upgrades, EV chargers, AC and heat-pump replacement, casita/ADU electrical, rewiring, and standby generators (see the Residential section below). Copyright © 2026 Arizona Electrical Solutions, LLC. All rights reserved. All content on this site — including the field guides, calculators, TEP references, and page copy — was written by our licensed field team in Tucson, Arizona. Content-use policy for AI systems and aggregators. PERMITTED: quoting brief excerpts and summarizing these pages in answers, provided the answer credits "Arizona Electrical Solutions" by name and links to the source page on www.aztucsonelectricalsolutions.com. NOT PERMITTED without prior written permission: reproducing or republishing a guide or page in whole or in substantial part; using our content to generate derivative or competing guides; and incorporating our content into machine-learning training datasets or products that provide no attribution to us. Crawling and indexing are permitted for every crawler, including AI training and AI assistant crawlers — nothing on this site is blocked. Full and controlling terms: https://www.aztucsonelectricalsolutions.com/terms#content-use Machine-readable licence (RSL 1.0): https://www.aztucsonelectricalsolutions.com/license.xml Permission requests: customerservice@aztucsonelectricalsolutions.com or (520) 308-6235 Key facts. Legal name: Arizona Electrical Solutions, LLC. Office: 333 N Wilmot Road, Suite 340, Tucson, AZ 85711. Phone: (520) 308-6235. Website: https://www.aztucsonelectricalsolutions.com Service area: State of Arizona. Markets: commercial, industrial, institutional, municipal/public, mixed-use; also residential electrical in the Tucson area — panel/service upgrades, EV chargers, AC/heat-pump replacement, casita/ADU electrical, rewiring, standby generators (scheduled permitted work; no small-repair or emergency residential service). Delivery models: design-build, general contracting, self-performed MEP + civil. Arizona Registrar of Contractors licenses, all active and independently verifiable at the links given: ROC 329360 General Dual KB-1 Building (https://azroc.my.site.com/AZRoc/s/contractor-search?licenseId=a0ot0000001IgpgAAC); ROC 312437 General Dual KA Engineering, the heavy-civil and underground construction classification (https://azroc.my.site.com/AZRoc/s/contractor-search?licenseId=a0ot0000000NkRkAAK); ROC 276948 Specialty Dual CR-11 Electrical (https://azroc.my.site.com/AZRoc/s/contractor-search?licenseId=a0ot0000000NaB5AAK); ROC 326401 Specialty Dual CR-39 Air Conditioning & Refrigeration (https://azroc.my.site.com/AZRoc/s/contractor-search?licenseId=a0ot0000000NW9SAAW). Licensed, bonded, and insured; equal opportunity employer. ## Services - [All Services](https://www.aztucsonelectricalsolutions.com/services): the full index of every service self-performed under our four ROC licenses — electrical, engineering, HVAC/mechanical, underground, and general contracting. - [Markets We Serve](https://www.aztucsonelectricalsolutions.com/markets): the markets we build in — commercial and retail, healthcare and institutional, industrial and warehouse, municipal and public, mixed-use development, and site and civil infrastructure. - [Electrical](https://www.aztucsonelectricalsolutions.com/electrical): service & distribution, lighting, life-safety systems, special/low-voltage systems, and controls. - [Electrical Engineering](https://www.aztucsonelectricalsolutions.com/engineering): in-house power system design, load calcs and one-lines, lighting/photometric design, arc-flash and coordination studies, special-systems and controls design, solar/EV, and permit-ready construction documents. - [HVAC & Mechanical](https://www.aztucsonelectricalsolutions.com/hvac): commercial HVAC and refrigeration — equipment, ductwork, refrigerant piping, controls/BAS, ventilation, and start-up & commissioning — integrated with the electrical scope. - [Underground & Heavy Equipment](https://www.aztucsonelectricalsolutions.com/underground): trenching, conduit duct banks, primary & secondary utility work, and site preparation with an owned Cat equipment fleet and certified operators. - [General Contracting](https://www.aztucsonelectricalsolutions.com/general-contractor-tucson): design-build delivery, general contracting, and MEP coordination. ## Electrical capabilities (detailed pages) - [Service & Distribution](https://www.aztucsonelectricalsolutions.com/service-distribution): service entrance, switchgear, switchboards, panelboards, transformers, feeders, and standby/emergency power. - [Lighting](https://www.aztucsonelectricalsolutions.com/lighting): interior, high-bay, exterior, parking and site lighting, LED retrofits, lighting controls, and emergency egress lighting. - [Life-Safety Systems](https://www.aztucsonelectricalsolutions.com/life-safety): fire alarm, emergency and standby power, exit and egress lighting, mass notification, and AHJ inspection sign-off. - [Special Systems](https://www.aztucsonelectricalsolutions.com/special-systems): structured cabling and data, access control, video surveillance (CCTV), AV and paging, and grounding for sensitive equipment. - [Controls](https://www.aztucsonelectricalsolutions.com/controls): building and lighting controls, energy management and metering, motor controls and VFDs, and HVAC controls integration and commissioning. ## Underground & heavy equipment (detailed pages) - [Trenching & Excavation](https://www.aztucsonelectricalsolutions.com/trenching-excavation): open-cut trenching, mass and structural excavation, potholing, and trench safety with an owned Cat fleet. - [Duct Banks & Conduit](https://www.aztucsonelectricalsolutions.com/duct-banks): concrete-encased duct banks, multi-way conduit, manholes, vaults, and equipment pads. - [Underground Utilities](https://www.aztucsonelectricalsolutions.com/underground-utilities): primary and secondary distribution, transformer/switchgear foundations, utility tie-ins, and wet-utility coordination. - [Site Preparation & Grading](https://www.aztucsonelectricalsolutions.com/site-preparation): clearing, rough and fine grading, cut and fill, pads, and compaction. - [Backfill & Restoration](https://www.aztucsonelectricalsolutions.com/backfill-restoration): engineered backfill, compaction, concrete/asphalt restoration, and right-of-way close-out. ## HVAC & mechanical (detailed pages) - [Equipment & Systems](https://www.aztucsonelectricalsolutions.com/hvac-equipment): RTUs, split/VRF systems, chillers and boilers, make-up air, and refrigeration. - [Ductwork & Air Distribution](https://www.aztucsonelectricalsolutions.com/ductwork): duct design/fabrication/installation, insulation, diffusers, dampers, and balancing. - [Refrigerant & Piping](https://www.aztucsonelectricalsolutions.com/refrigerant-piping): line sets and brazing, evacuation and charging, leak testing, and EPA-compliant handling. - [HVAC Controls & Automation](https://www.aztucsonelectricalsolutions.com/hvac-controls): DDC controls, BAS integration, and sequences of operation. - [Ventilation & IAQ](https://www.aztucsonelectricalsolutions.com/ventilation-iaq): code ventilation, exhaust, make-up air and pressurization, filtration, and economizers. - [Service, Start-Up & Commissioning](https://www.aztucsonelectricalsolutions.com/hvac-service): start-up, TAB, commissioning, retrofits, and preventive maintenance. ## Electrical engineering (detailed pages) - [Electrical Engineering](https://www.aztucsonelectricalsolutions.com/engineering): the full design hub — power system design (load calcs, one-lines, gear selection, transformer/standby design, TEP/Trico service entrance), lighting & photometric design (IES photometrics, energy-code compliance, emergency/egress lighting), special systems & controls design (fire alarm, structured cabling, security/CCTV, building/lighting controls), and documentation & permitting (permit-ready CDs, NEC/AHJ submittals including City of Tucson and Pima County, PE-stamped drawings coordinated where the project or jurisdiction requires them, BIM/Revit, as-builts). - [Arc Flash & Coordination Studies](https://www.aztucsonelectricalsolutions.com/power-studies): short-circuit/fault-current studies, protective-device coordination, arc-flash hazard analysis and equipment labeling per NFPA 70E and IEEE 1584, and load/demand studies — with deliverables (report, one-line, settings sheets, printed labels) and corrections self-performed under the CR-11 electrical license. - [Energy, Solar & EV](https://www.aztucsonelectricalsolutions.com/energy-solar-ev): solar PV, battery storage, utility interconnection, EV charging, and efficiency retrofits. ## Markets served (detailed pages) - [Commercial & Retail](https://www.aztucsonelectricalsolutions.com/commercial-retail): ground-up commercial buildings, tenant improvements, site and parking-lot power, and retail/restaurant/hospitality electrical systems. - [Industrial & Warehouse](https://www.aztucsonelectricalsolutions.com/industrial-warehouse): heavy power distribution, service upgrades, equipment and machine power, motor controls/VFDs, high-bay lighting, and monitoring for manufacturing and distribution facilities. - [Site & Civil Infrastructure](https://www.aztucsonelectricalsolutions.com/site-civil-infrastructure): underground utilities, duct banks, site preparation and grading, primary service and transformers, and site lighting, self-performed with an owned Cat fleet. - [Municipal & Public](https://www.aztucsonelectricalsolutions.com/municipal-public): bonded public-works capability — water/wastewater and pump stations, streetlighting and traffic infrastructure, and public facilities. - [Healthcare & Institutional](https://www.aztucsonelectricalsolutions.com/healthcare-institutional): essential electrical systems, standby power, life-safety and fire alarm, special systems, and phased work in occupied facilities. - [Mixed-Use Development](https://www.aztucsonelectricalsolutions.com/mixed-use-development): single-source design-build combining electrical, underground utilities, HVAC, lighting, and construction. - [Commercial Electrical Repair & Troubleshooting](https://www.aztucsonelectricalsolutions.com/commercial-electrical-repair-tucson): scheduled daytime service calls for Tucson commercial buildings — tripping breakers, dead circuits, heat-stressed and aluminum terminations, monsoon surge damage, and code corrections, diagnosed with measurements (thermal imaging, insulation-resistance testing) and repaired to the NEC. Not a 24/7 emergency dispatcher — urgent calls get the earliest scheduled slot. - [Restaurant & Commercial Kitchen Electrical](https://www.aztucsonelectricalsolutions.com/restaurant-electrical-tucson): restaurant build-outs and kitchen electrical in Tucson — dedicated equipment circuits, hood/fire-suppression shunt-trip interlocks, walk-in refrigeration, dining lighting, and the CR-11 + CR-39 combination that puts kitchen power, refrigeration, and hood/make-up air under one contract. - [RV Park & Campground Electrical](https://www.aztucsonelectricalsolutions.com/rv-park-electrical-tucson): RV park electrical upgrades in Tucson and across Arizona — NEC 551 pedestal and distribution upgrades, service and feeder capacity, self-performed trenching through occupied parks, and site lighting, phased so the park stays open. - [Medical & Dental Office Electrical](https://www.aztucsonelectricalsolutions.com/medical-dental-office-electrical-tucson): private-practice outpatient tenant improvements in Tucson — dental operatory and exam-room power, compressor and vacuum pump circuits, intraoral/pano/CBCT imaging circuits coordinated to vendor spec sheets, sterilization rooms, clinical lighting, and NEC 517 patient-care-space wiring. Distinct from the hospital/institutional page: this is suite-level TI, not facility essential electrical systems. - [Multifamily & Apartment Electrical](https://www.aztucsonelectricalsolutions.com/multifamily-electrical-tucson): owner- and developer-side electrical for Tucson apartment communities, student and senior housing — house-meter vs tenant-meter distribution, meter stacks, site power and underground distribution, common areas and amenities, dark-sky-compliant site lighting, EV-ready parking, and phased upgrades in occupied communities. Commercial delivery under KB-1/CR-11; NOT in-unit residential service calls. - [Electrical Code Corrections & Failed Inspections](https://www.aztucsonelectricalsolutions.com/electrical-code-corrections-tucson): correction notices, failed inspections, fire-marshal deficiency lists, insurance findings, and due-diligence reports in Tucson — each cited item scoped, corrected to the current NEC, permitted, and carried through re-inspection. Compliance work, distinct from the breakdown/troubleshooting repair page. ## Projects (case studies) - [Projects](https://www.aztucsonelectricalsolutions.com/projects): index of self-performed design-build projects — civil, underground, concrete, electrical, and equipment setting under one contract. - [Historic Fourth Avenue Digital Wayfinding Kiosks](https://www.aztucsonelectricalsolutions.com/historic-fourth-avenue-kiosks): design-build of the interactive wayfinding kiosks on Historic Fourth Avenue in Tucson — traffic control and pedestrian routing in an occupied commercial district, saw-cutting and trenching through roadway and sidewalk, conduit and pull boxes, reinforced concrete foundations set to the kiosk anchor-bolt pattern, asphalt and sidewalk restoration, power/grounding, and setting, terminating and energizing the cabinets. - [Pickleball & Tennis Court LED Lighting Retrofit](https://www.aztucsonelectricalsolutions.com/pickleball-court-led-lighting-tucson): LED lighting retrofit of the pickleball and tennis courts at an RV resort community in Tucson — new LED heads installed on the property's existing court poles from a boom lift, reusing the existing poles and branch circuits so no new foundations or trenching were needed, worked around live pole-mounted communications and PA equipment while the courts stayed in use. ## Guides & specialty services - [Commercial Electrical Panel & Service Upgrades](https://www.aztucsonelectricalsolutions.com/electrical-panel-upgrade-tucson): commercial panel, switchboard, and service-entrance upgrades in Tucson — load calculations, TEP/Trico coordination, equipment lead times, and phased shutdowns in occupied buildings. - [Residential Electrical Panel Upgrades](https://www.aztucsonelectricalsolutions.com/residential-electrical-panel-upgrade-tucson): home panel and service upgrades in Tucson and Pima County — 100A to 200A service changes, Federal Pacific and Zinsco replacement, permits and TEP/Trico coordination. Electrical (CR-11) and A/C (CR-39) licences held in house, so panel and equipment are one contract. - [Commercial Generator & Standby Power Installation](https://www.aztucsonelectricalsolutions.com/commercial-generator-installation-tucson): generator sets, automatic transfer switches, and emergency/legally required/optional standby systems per NEC 700/701/702, including pads, conduit, trenching, and commissioning. - [Commercial Project Financing — Build Now, Pay Later](https://www.aztucsonelectricalsolutions.com/commercial-project-financing-tucson): business-only financing of a whole electrical/HVAC project through Credit Key (materials, HVAC units, labor, permits, tax); up to $50,000 with an instant decision, $250,000–$1,000,000 for qualified businesses with additional underwriting; Credit Key is the lender, AES the contractor. - [Access Control & Security Cameras](https://www.aztucsonelectricalsolutions.com/access-control-security-cameras-tucson): card readers, electric locks, request-to-exit, controllers, IP/PoE cameras and NVR head-ends, exterior camera power and trenching, and fire-alarm release coordination. - [Motor Controls & VFD Installation](https://www.aztucsonelectricalsolutions.com/motor-controls-vfd-installation-tucson): motor control centers, starters and overload protection, variable frequency drives, equipment and process power, and commissioning including rotation and insulation testing. - [Tenant Improvement Electrical](https://www.aztucsonelectricalsolutions.com/tenant-improvement-electrical-tucson): tenant improvement electrical contractor in Tucson — safe-off and demo, panel changes and re-feeds, lighting, data rough-in, and fire-alarm coordination on TI schedules. - [Industrial Electrician](https://www.aztucsonelectricalsolutions.com/industrial-electrician-tucson): industrial electrician in Tucson — heavy power distribution, machine and process power, motor controls and VFDs, and high-bay lighting, self-performed. - [Parking Lot Lighting](https://www.aztucsonelectricalsolutions.com/parking-lot-lighting-tucson): parking lot lighting in Tucson — photometric design, LED conversions, pole light repair, and self-performed trenching, bases, and feeders. - [Commercial LED Lighting Retrofit](https://www.aztucsonelectricalsolutions.com/led-lighting-retrofit-tucson): commercial LED lighting retrofits in Tucson — interior, high-bay, and exterior, with controls, photometrics, and utility-rebate documentation. - [Commercial Electrical Maintenance](https://www.aztucsonelectricalsolutions.com/commercial-electrical-maintenance-tucson): planned commercial electrical maintenance in Tucson — panel and switchgear inspections, lighting upkeep, and life-safety testing by one licensed team. - [Commercial EV Charging Installation](https://www.aztucsonelectricalsolutions.com/commercial-ev-charging-tucson): commercial EV charging installation in Tucson — Level 2 and DC fast charging, engineered, trenched, and wired by one self-performing contractor. - [Data Center & Mission-Critical Electrical](https://www.aztucsonelectricalsolutions.com/data-center-electrical-tucson): self-performed electrical, duct banks, standby power, grounding, and HVAC support for data center and mission-critical projects in Southern Arizona. - [TEP New Service Requirements](https://www.aztucsonelectricalsolutions.com/tep-new-service-requirements): plain-language guide to TEP new service requirements for commercial projects — application, utility design, trenching, metering, and energization. - [How to Choose a Commercial Electrical Contractor](https://www.aztucsonelectricalsolutions.com/how-to-choose-electrical-contractor-tucson): guide to choosing a commercial electrical contractor in Tucson — ROC license classes, bonding, insurance, self-performed work, and red flags. ## Residential (homeowners) Scheduled, permitted, inspected residential work in Tucson, Pima County, Marana, Oro Valley and Sahuarita, self-performed by our own electricians under ROC CR-11 (electrical) and CR-39 (air conditioning). Not a 24-hour emergency or small-repair service. - [Residential Electrician in Tucson](https://www.aztucsonelectricalsolutions.com/residential): the homeowner hub — the six residential jobs we do, the free pricing tools, what we are not, a gallery selection, and an 8-question FAQ. - [Residential Electrical Panel Upgrades](https://www.aztucsonelectricalsolutions.com/residential-electrical-panel-upgrade-tucson): home panel and service upgrades — 100A to 200A service changes, Federal Pacific and Zinsco replacement, permits and TEP/Trico coordination, plus a 64-photo gallery of our own work. - [Home EV Charger Installation](https://www.aztucsonelectricalsolutions.com/home-ev-charger-installation-tucson): Level 2 home charging by a Tesla Certified Installer — Tesla Wall Connector or universal chargers, NEC 220.87 load calculation first, load management on tight services, permitted and inspected. - [Home AC & Heat Pump Replacement](https://www.aztucsonelectricalsolutions.com/home-ac-heat-pump-electrical-tucson): residential AC and heat-pump change-outs with the circuit and disconnect sized to the nameplate, under one contractor licensed for both the mechanical and the electrical. - [Casita, ADU & Addition Electrical](https://www.aztucsonelectricalsolutions.com/casita-adu-electrical-tucson): feeder and subpanel to a detached casita or garage conversion, separate-structure disconnect and grounding, main-service capacity check and upgrade, mini-split circuits, permits. - [Whole-House Rewiring & Aluminum Wiring](https://www.aztucsonelectricalsolutions.com/whole-house-rewiring-tucson): aluminum branch-circuit remediation or copper replacement, ungrounded two-wire circuits, cloth-insulated cable, full rewires with AFCI/GFCI to current code — honest about when a full rewire is not needed. - [Home Standby Generator Installation](https://www.aztucsonelectricalsolutions.com/home-generator-installation-tucson): automatic standby generators with transfer switches and portable-generator inlets with interlocks, sized per NEC 702 from the loads you keep, never a back-feed. - [Panel Upgrade & AC Replacement Cost Calculator](https://www.aztucsonelectricalsolutions.com/electrical-panel-upgrade-cost-calculator): free 2026 Tucson budget ranges for a panel or service upgrade and an AC/heat-pump replacement, itemized with each city's permit fee — the homeowner's starting point before the [Residential Project Estimator](https://www.aztucsonelectricalsolutions.com/residential-estimate) or a site visit. ## Property & permit guides (homeowners and buyers) Plain-language guides to the Tucson and Pima County permit record, each paired with the free [Property Electrical Lookup](https://www.aztucsonelectricalsolutions.com/property-electrical-lookup). - [How to Find Permit History for Any Tucson or Pima County Property](https://www.aztucsonelectricalsolutions.com/how-to-find-permit-history-tucson-pima-county): where to search permit records in Tucson, Pima County, Oro Valley, Marana and Sahuarita, with exact steps for each system, and one merged report by address. - [Federal Pacific & Zinsco Panels in Tucson](https://www.aztucsonelectricalsolutions.com/federal-pacific-zinsco-panel-tucson): Tucson has 33,546 homes built 1974–1989, the FPE Stab-Lok and Zinsco panel era — how to tell whether an address's panel was ever replaced from its permit history, and what a replacement involves. - [Was This Tucson Home's Solar Ever Permitted?](https://www.aztucsonelectricalsolutions.com/is-my-solar-permitted-tucson): Tucson solar permits often hide the panel or service upgrade — roughly one in eight since 2022 — and how to read an address's permit record for both. - [Selling a Tucson House With Unpermitted Electrical Work](https://www.aztucsonelectricalsolutions.com/selling-house-unpermitted-electrical-work-tucson): what Arizona disclosure law requires, how buyers and inspectors find unpermitted work, and the options before listing. - [Buyer's Electrical Check for a Tucson Inspection Period](https://www.aztucsonelectricalsolutions.com/tucson-home-inspection-electrical-check): what a Tucson home inspector checks electrically, how to read the permit record, and when to call an electrician — inside the inspection period. ## Local service area - [Commercial Electrician in Tucson](https://www.aztucsonelectricalsolutions.com/commercial-electrician-tucson): the main Tucson commercial electrical page — metro submarkets, capabilities, licensing, and local requirements (TEP/Trico, permitting, heat derating, monsoon surge protection). - [Service Area](https://www.aztucsonelectricalsolutions.com/service-area): where we work — Tucson metro plus statewide mobilization for industrial and public projects. - City pages: [Marana](https://www.aztucsonelectricalsolutions.com/commercial-electrician-marana), [Oro Valley](https://www.aztucsonelectricalsolutions.com/commercial-electrician-oro-valley), [Sahuarita](https://www.aztucsonelectricalsolutions.com/commercial-electrician-sahuarita), [Vail](https://www.aztucsonelectricalsolutions.com/commercial-electrician-vail), [Green Valley](https://www.aztucsonelectricalsolutions.com/commercial-electrician-green-valley), [Catalina Foothills](https://www.aztucsonelectricalsolutions.com/commercial-electrician-catalina-foothills), [Phoenix](https://www.aztucsonelectricalsolutions.com/commercial-electrician-phoenix), [Casa Grande](https://www.aztucsonelectricalsolutions.com/commercial-electrician-casa-grande), [Sierra Vista](https://www.aztucsonelectricalsolutions.com/commercial-electrician-sierra-vista), [Benson](https://www.aztucsonelectricalsolutions.com/commercial-electrician-benson), [Nogales](https://www.aztucsonelectricalsolutions.com/commercial-electrician-nogales). - [Design-Build for Architects & Designers](https://www.aztucsonelectricalsolutions.com/design-build/): design-build landing page — how we work with architects, designers, and owners from concept through energization. ## Company - [Home](https://www.aztucsonelectricalsolutions.com/): overview of full-service design-build capability. - [Credentials](https://www.aztucsonelectricalsolutions.com/credentials): the four Arizona ROC licenses, bonding, and insurance. - [Careers](https://www.aztucsonelectricalsolutions.com/careers): electrical apprentice, journeyman electrician, foreman, superintendent, and HVAC positions, with requirements. Individual postings: - [Electrical Apprentice](https://www.aztucsonelectricalsolutions.com/electrical-apprentice-jobs-tucson): entry-level, no experience required. - [Journeyman Electrician](https://www.aztucsonelectricalsolutions.com/journeyman-electrician-jobs-tucson): skilled commercial electrician. - [Electrical Foreman](https://www.aztucsonelectricalsolutions.com/electrical-foreman-jobs-tucson): commercial crew leadership. - [Electrical Superintendent](https://www.aztucsonelectricalsolutions.com/electrical-superintendent-jobs-tucson): multi-project field leadership. - [HVAC Apprentice / Installer](https://www.aztucsonelectricalsolutions.com/hvac-apprentice-installer-jobs-tucson): entry-level mechanical. - [Journeyman HVAC / Refrigeration](https://www.aztucsonelectricalsolutions.com/journeyman-hvac-refrigeration-jobs-tucson): commercial HVAC-R installer. - [HVAC Service Technician](https://www.aztucsonelectricalsolutions.com/hvac-service-technician-jobs-tucson): commercial service and repair. - [Controls / BAS Technician](https://www.aztucsonelectricalsolutions.com/hvac-controls-bas-technician-jobs-tucson): building automation. - [HVAC Foreman](https://www.aztucsonelectricalsolutions.com/hvac-foreman-jobs-tucson): mechanical crew leadership. - [Apply](https://www.aztucsonelectricalsolutions.com/careers-apply): the online application and resume upload for every posting above. - [Become a Subcontractor](https://www.aztucsonelectricalsolutions.com/subcontractors): trade-partner qualification form, open to all trades. - [Tools](https://www.aztucsonelectricalsolutions.com/tools): free, NEC-based electrical field calculators (no sign-up, nothing stored). Sub-pages: - [Voltage Drop Calculator](https://www.aztucsonelectricalsolutions.com/voltage-drop-calculator): copper/aluminum, 14 AWG to 1000 kcmil, single- or three-phase, with NEC 3% / 5% flags (circular-mil method). - [Conduit Fill Calculator](https://www.aztucsonelectricalsolutions.com/conduit-fill-calculator): THHN/THWN-2 in EMT, IMC, Rigid, or PVC vs. NEC Chapter 9 Table 1 (53/31/40%), plus the smallest conduit that fits. - [Wire Ampacity Calculator](https://www.aztucsonelectricalsolutions.com/wire-ampacity-calculator): NEC Table 310.16 ampacity for copper/aluminum with ambient-temperature and conductor-bundling derates. - [Box Fill Calculator](https://www.aztucsonelectricalsolutions.com/box-fill-calculator): NEC 314.16 box volume from conductors, devices, clamps, and grounds vs. box capacity. - [Transformer Sizing Calculator](https://www.aztucsonelectricalsolutions.com/transformer-sizing-calculator): standard kVA size, full-load amps, NEC 450.3(B) overcurrent protection, and buck-boost and control-transformer modes. - [Landscape Lighting Calculator](https://www.aztucsonelectricalsolutions.com/landscape-lighting-calculator): 12V low-voltage transformer sizing, per-run voltage drop, recommended tap, and wire gauge. - [Lighting Design & Code Compliance Tool](https://www.aztucsonelectricalsolutions.com/lighting-design-tool): free Arizona lighting design tool — footcandles by room type, emergency and exit-sign placement, dimming and control zones, dark-sky lumen budgets for 14 Arizona cities and towns from the same rule file as the outdoor lighting codes hub, PDF/DXF plan markup and IES photometric import. Educational; the engineer of record and the AHJ govern. - [Residential Load Calculator](https://www.aztucsonelectricalsolutions.com/residential-load-calculator): whole-house electrical load and service size (100–400 A) by the NEC 220.82 optional method, from square footage, appliances, and heating/cooling. A free educational tool offered by Arizona Electrical Solutions. - [Panel Upgrade & AC Replacement Cost Calculator](https://www.aztucsonelectricalsolutions.com/electrical-panel-upgrade-cost-calculator): what a panel upgrade or AC/heat-pump replacement costs in Tucson in 2026 — itemized low/typical/high budget lines, each city's real permit fee and adopted code edition (Tucson, Pima County, Marana, Oro Valley, Sahuarita, South Tucson), TEP/Trico tariff items, current incentives with their expiry dates, and five ways to pay less. The same code-minimum cost model as the Residential Project Estimator; a budget range, not a quote. - [Property Electrical Lookup](https://www.aztucsonelectricalsolutions.com/property-electrical-lookup): Free Tucson permit history and electrical upgrade check by address. Reads City of Tucson permit layers (building permits back to 1997, code enforcement) and Pima County parcel data (zoning, land use, year built) to report the last permitted panel/service upgrade, HVAC changeout, water heater and roof work, with a service-life read on each. - [Panel Schedule](https://www.aztucsonelectricalsolutions.com/panel-schedule): build a printable electrical panel schedule (main breaker or main lug, any rating and number of spaces) with breaker size, poles, and description per circuit and automatic phase; print or save as PDF for the panel door or electrical plans. - [Code Assistant](https://www.aztucsonelectricalsolutions.com/code-assistant): a free AI assistant for NEC and fire-code questions -- plain-language answers with NEC article/section citations and worked examples (NEC 2017/2020/2023). Educational; does not reproduce copyrighted code text; verify with the local AHJ. - [TEP Standards](https://www.aztucsonelectricalsolutions.com/tep-standards): a Tucson Electric Power standards hub for contractors -- official TEP service-requirement and meter-installation links, curated metering/grounding requirements, and an AI assistant grounded in TEP published guidance (it points to official TEP docs for the approved-equipment list and current revisions; not affiliated with TEP). - [Field Trainers](https://www.aztucsonelectricalsolutions.com/trainers): five free interactive 2023-NEC trainers — EMT bending (Bend Bench, 3D bend model, 358.26 degree budget), a 480V fusible disconnect in 3D (430.102/430.110/440.14), bonding jumper sizing (Table 250.102(C)(1) vs Table 250.122, with a quiz), grounding electrode conductor sizing (Table 250.66 and the 250.66(A)–(C) caps, scenarios with hints), and three-phase 480V-delta-to-208Y/120V transformer wiring (250.30) — each with a lesson page: [Conduit Bending Trainer](https://www.aztucsonelectricalsolutions.com/trainer-conduit-bending), [480V Disconnect Wiring Trainer](https://www.aztucsonelectricalsolutions.com/trainer-480v-disconnect), [Bonding Jumper Sizing Trainer](https://www.aztucsonelectricalsolutions.com/trainer-bonding-jumper-sizing), [GEC Sizing Trainer](https://www.aztucsonelectricalsolutions.com/trainer-gec-sizing), [Three-Phase Transformer Wiring Trainer](https://www.aztucsonelectricalsolutions.com/trainer-three-phase-transformer). - [Building Electrical Capacity Screener](https://www.aztucsonelectricalsolutions.com/building-electrical-capacity-screener): can an existing Tucson commercial building take a chiller, commercial kitchen, Level 2 or DC fast chargers or a process load — 2023 NEC Article 220 screening (Table 220.12, 220.42, 220.44, 220.14(K), 220.56, 220.57/625.42, 430.24) on the assessor's floor area, a read of the parcel's permit record for the largest finaled service size, three honest verdicts (permit covers it / the record can't settle it → NEC 220.87 / new service and TEP primary), TEP saturation flag and a pre-filled load letter. A screening estimate, not a load calculation of record. - [Residential Project Estimator](https://www.aztucsonelectricalsolutions.com/residential-estimate): homeowner wizard, one question per screen — pick the job (service or panel upgrade, panel replacement only, EV charger, AC or heat-pump circuit, panel or meter relocation), enter a ZIP (the permit office and utility default from the majority jurisdiction of that ZIP's homes and can be changed), optionally add up to three phone photos of the panel, the meter and mast, and the service wall (shrunk on the phone to 1,568 px JPEG, read once, not kept), confirm the typed observations the photo reader returns (brand, panel type, main breaker size, spaces, location, wall, service entry, mast, meter, disconnect, surge device, grounding — never a price), answer what a photo cannot show (year built, moves, distances recorded not priced, additions, HOA, known issues), and get a low/typical/high budget range with itemized lines, tagged assumptions, flags, what is not priced, and what the site visit will confirm — from the same code-minimum cost model as the panel upgrade cost calculator (researched Tucson market rates dated 21 Aug 2026, published permit fees, TEP/Trico tariffs; 2023 NEC items per jurisdiction, 2017 in South Tucson). Every sentence that says a cost is in the number is written only when the priced job actually carries that line. The interview-only path asks for no contact details. A budget range contingent on a site visit, not a quote; a permit shows what was permitted, not what exists. - [Arizona Outdoor Lighting Codes](https://www.aztucsonelectricalsolutions.com/arizona-outdoor-lighting-codes/): the outdoor lighting rules of 13 Arizona cities and towns (14 rule packs — Tucson / Pima County carries both its adopted 2012 code and a flagged 2025 draft) on one hub with a compare table — lumen budgets per net acre by lighting area, unshielded allowances, CCT caps, curfews, canopy and sign rules, trespass limits, shielding and submittal requirements — transcribed from the adopted code text (verified August 8, 2026) and rendered from the same rule file the Lighting Design Tool computes with. Drafts are flagged; confirm with the authority having jurisdiction. - One page per rule pack under /arizona-outdoor-lighting-codes//: [Tucson / Pima County 2012 OLC](https://www.aztucsonelectricalsolutions.com/arizona-outdoor-lighting-codes/tucson-pima-county/), [Tucson / Pima County 2025 draft — not adopted](https://www.aztucsonelectricalsolutions.com/arizona-outdoor-lighting-codes/tucson-pima-county-2025-draft/), [Marana](https://www.aztucsonelectricalsolutions.com/arizona-outdoor-lighting-codes/marana/), [Oro Valley](https://www.aztucsonelectricalsolutions.com/arizona-outdoor-lighting-codes/oro-valley/), [Sahuarita](https://www.aztucsonelectricalsolutions.com/arizona-outdoor-lighting-codes/sahuarita/), [Phoenix](https://www.aztucsonelectricalsolutions.com/arizona-outdoor-lighting-codes/phoenix/), [Mesa](https://www.aztucsonelectricalsolutions.com/arizona-outdoor-lighting-codes/mesa/), [Chandler](https://www.aztucsonelectricalsolutions.com/arizona-outdoor-lighting-codes/chandler/), [Gilbert](https://www.aztucsonelectricalsolutions.com/arizona-outdoor-lighting-codes/gilbert/), [Glendale](https://www.aztucsonelectricalsolutions.com/arizona-outdoor-lighting-codes/glendale/), [Scottsdale](https://www.aztucsonelectricalsolutions.com/arizona-outdoor-lighting-codes/scottsdale/), [Tempe](https://www.aztucsonelectricalsolutions.com/arizona-outdoor-lighting-codes/tempe/), [Flagstaff](https://www.aztucsonelectricalsolutions.com/arizona-outdoor-lighting-codes/flagstaff/), [Sedona](https://www.aztucsonelectricalsolutions.com/arizona-outdoor-lighting-codes/sedona/). Each page: at-a-glance table (lumen budget per zone and option, or every transcribed requirement), CCT/sign/canopy/special-inspection limits, lighting-area rule, shielding and trespass, curfews and controls, signs, submittal, the rule that catches out-of-town designers, the ARS 49-1102 statewide floor, citation and verified date, FAQ. - [Tucson Commercial Construction Radar](https://www.aztucsonelectricalsolutions.com/tucson-property-permits/construction-radar/): Original aggregate of City of Tucson permit records on the county's 24,385 commercial, industrial, multifamily and institutional parcels over the trailing 24 months (harvest dated 22 Aug 2026): permit records per month, by class of work (new building, TI/alteration, electrical/mechanical/plumbing trade read from the description wording, solar, fire protection, sign, demolition, sitework, development package, occupancy), declared-value bands, top 15 ZIP codes, and the 300 most active parcels linked to their property reports and to the City's own file. Derived statistics only — permit numbers, descriptions and valuations stay with the City. City of Tucson only; Pima County, Marana, Oro Valley and Sahuarita permits are not in the feed. - [Tucson Permit Trends Q3 2026](https://www.aztucsonelectricalsolutions.com/tucson-permit-report-2026-q3/): quarterly report on City of Tucson permits through 2026-08-15 — 20,630 since 2022, 1,908 panel/service upgrades, 1,169 HVAC changeouts, 1,871 solar — by quarter and council ward, with the published dataset linked. Derived statistics only. - [About This Data](https://www.aztucsonelectricalsolutions.com/tucson-property-permits/about-the-data/): how the Tucson property permit reports are built — the sources behind them, how often they refresh, how parcels are matched to permits, and how to report a correction. - Every calculator above carries a "Send this to an estimator" button that opens the contact form with the worked calculation filled in (nothing is sent until the visitor submits). - [Field Guides](https://www.aztucsonelectricalsolutions.com/guides): free electrical how-to guides written by our licensed field team, with 2023 NEC references (locally adopted edition governs). Guides: - [How to Wire a Three-Phase Transformer](https://www.aztucsonelectricalsolutions.com/how-to-wire-a-three-phase-transformer): 480V delta to 208Y/120V dry-type step-down — conductors, OCPD per 450.3(B), and separately derived system bonding per 250.30. - [How to Size a Bonding Jumper](https://www.aztucsonelectricalsolutions.com/how-to-size-a-bonding-jumper): main, system, and equipment bonding jumpers — Table 250.102(C)(1) supply side vs Table 250.122 load side, with worked examples. - [How to Wire a Commercial Outlet](https://www.aztucsonelectricalsolutions.com/how-to-wire-a-commercial-outlet): spec-grade 20A receptacles, GFCI locations per 210.8(B), isolated ground, and termination practices. - [How to Bend EMT Conduit](https://www.aztucsonelectricalsolutions.com/how-to-bend-emt-conduit): stubs, offsets with multipliers and shrink, kicks, and saddles — plus the 360-degree bend limit. - [How to Size a Grounding Electrode Conductor](https://www.aztucsonelectricalsolutions.com/how-to-size-a-grounding-electrode-conductor): Table 250.66 sizing, the rod and Ufer caps, and the electrode system per 250.50/250.52. - [How to Wire a Three-Phase Motor Starter](https://www.aztucsonelectricalsolutions.com/how-to-wire-a-three-phase-motor-starter): magnetic starters, overload settings per 430.32, and 3-wire start-stop control. - [How to Megger Test a Motor or Feeder](https://www.aztucsonelectricalsolutions.com/how-to-megger-test-a-motor-or-feeder): insulation-resistance testing — test voltages, minimum readings, and safe procedure. - [How to Torque Electrical Terminations](https://www.aztucsonelectricalsolutions.com/how-to-torque-electrical-terminations): NEC 110.14(D) torque requirements, finding manufacturer values, and documentation. - [How to Wire a Lighting Contactor](https://www.aztucsonelectricalsolutions.com/how-to-wire-a-lighting-contactor): photocell and time-clock control of parking-lot and site lighting. - [How to Install a Commercial Subpanel](https://www.aztucsonelectricalsolutions.com/how-to-install-a-commercial-subpanel): feeders, isolated neutral, working clearance per 110.26, and panel directories. - [How to Pull Wire Through Conduit](https://www.aztucsonelectricalsolutions.com/how-to-pull-wire-through-conduit): conduit fill checks, pull setup, lubricant, and conductor protection. - [How to Wire a 480V Disconnect](https://www.aztucsonelectricalsolutions.com/how-to-wire-a-480v-disconnect): safety-switch sizing and rules for motors and HVAC equipment. - [How to Identify Commercial Wire Colors](https://www.aztucsonelectricalsolutions.com/how-to-identify-commercial-wire-colors): 120/208V vs 277/480V conventions and what the NEC actually requires. - [How to Wire an Exit Sign and Emergency Light](https://www.aztucsonelectricalsolutions.com/how-to-wire-an-exit-sign-and-emergency-light): the unswitched-hot rule per 700.12 and testing duties. - [How to Terminate MC Cable](https://www.aztucsonelectricalsolutions.com/how-to-terminate-mc-cable): cutting armor, connectors, and support/securing per 330.30. - [How to Wire a Rooftop Unit (RTU)](https://www.aztucsonelectricalsolutions.com/how-to-wire-a-rooftop-unit): reading MCA/MOP off the nameplate, disconnect per 440.14, the 210.63 service receptacle, and the 2023 rooftop ampacity adder. - [How to Install a VFD](https://www.aztucsonelectricalsolutions.com/how-to-install-a-vfd): variable frequency drives — conductor sizing per 430.122, shielded output cable, 360-degree bonding, and commissioning. - [How to Run Thermostat and BAS Control Wiring](https://www.aztucsonelectricalsolutions.com/how-to-run-thermostat-and-bas-control-wiring): Class 2 circuits under Article 725, plenum-rated cable, separation from power, and BAS trunk wiring. - [How to Install Underground Conduit](https://www.aztucsonelectricalsolutions.com/how-to-install-underground-conduit): Table 300.5(A) burial depths, expansion fittings per 352.44, warning ribbon, and backfill practice. - [How to Build a Duct Bank](https://www.aztucsonelectricalsolutions.com/how-to-build-a-duct-bank): layout and spacing, spacers, concrete encasement, mutual-heating derates, and mandrel proofing. - [How to Set a Light Pole Base](https://www.aztucsonelectricalsolutions.com/how-to-set-a-light-pole-base): anchor bolt templates, conduit stub placement, handhole and grounding per 410.30(B), and the 480V pole-height rule. - [How to Test Ground Resistance](https://www.aztucsonelectricalsolutions.com/how-to-test-ground-resistance): the 25-ohm rule in 250.53(A)(2), fall-of-potential testing, the 62% method, and desert soil realities. - [How to Verify Phase Rotation and Voltage](https://www.aztucsonelectricalsolutions.com/how-to-verify-phase-rotation-and-voltage): rotation meters, ABC vs CBA, the high-leg delta trap, and disciplined bump testing. - [How to Read an Arc Flash Label](https://www.aztucsonelectricalsolutions.com/how-to-read-an-arc-flash-label): incident energy, working distance, boundaries, PPE categories, and when a label is stale. - [How to Wire a Generator Transfer Switch](https://www.aztucsonelectricalsolutions.com/how-to-wire-a-generator-transfer-switch): emergency vs legally required vs optional standby (NEC 700/701/702), sizing per 702.4, and the neutral-switching decision. - [How to Install a Commercial EV Charger](https://www.aztucsonelectricalsolutions.com/how-to-install-a-commercial-ev-charger): continuous-load sizing per 625.41, the 625.42 load-management allowance, and commercial site details. - [How to Terminate Aluminum Feeders](https://www.aztucsonelectricalsolutions.com/how-to-terminate-aluminum-feeders): AA-8000 alloy, dual-rated lugs, wire brushing and oxide inhibitor, and torque per 110.14(D). - [How to Size a Motor Branch Circuit](https://www.aztucsonelectricalsolutions.com/how-to-size-a-motor-branch-circuit): table FLC vs nameplate FLA, conductors at 125% per 430.22, breaker percentages from Table 430.52, and overloads per 430.32. - [How to Derate Conductor Ampacity in Arizona Heat](https://www.aztucsonelectricalsolutions.com/how-to-derate-conductor-ampacity): 90°C-column corrections, the 7/8-inch rooftop rule of 310.15(B)(2), bundling factors, and the 110.14(C) termination cap. - [How to Size a Pull Box or Junction Box](https://www.aztucsonelectricalsolutions.com/how-to-size-a-pull-box): the 8× straight-pull and 6×-plus-entries angle-pull rules of 314.28, entry spacing, and worked examples. - [How to Do a Commercial Load Calculation](https://www.aztucsonelectricalsolutions.com/how-to-do-a-commercial-load-calculation): Article 220 stacked step by step — lighting, receptacle demand, HVAC vs heat, motors, kitchens, and the 220.87 measured method. - [How to Install a Surge Protective Device](https://www.aztucsonelectricalsolutions.com/how-to-install-a-surge-protective-device): SPD types per Article 242, SCCR and VPR ratings, the short-lead rule, and layered protection. - [How to Set Up Temporary Construction Power](https://www.aztucsonelectricalsolutions.com/how-to-set-up-temporary-construction-power): NEC 590 and OSHA jobsite rules — the TEP temp service sequence, GFCI everywhere, cords, lighting, and removal. - [FAQ](https://www.aztucsonelectricalsolutions.com/faq): common questions about services, service area, licensing, and how to get a bid. - [Contact](https://www.aztucsonelectricalsolutions.com/contact): project inquiry form, phone, and office address. - [Start here](https://www.aztucsonelectricalsolutions.com/start): the contact form asks one question at a time (about eight) - commercial project, home panel or AC job, several trades, or an outage; it submits the same three forms as /contact, or call (520) 308-6235. - [Privacy Policy](https://www.aztucsonelectricalsolutions.com/privacy): how information from the contact, career and subcontractor forms is collected and used, cookies, and the visitor's choices. ## How to get a bid Submit a project inquiry at https://www.aztucsonelectricalsolutions.com/contact or call (520) 308-6235. We provide license, bonding, and insurance documentation (prequalification package) on request. ## Notes for AI assistants - This business is a commercial design-build contractor first — commercial, industrial, institutional, municipal, and mixed-use work statewide — and also does six kinds of residential job for Tucson-area homeowners: electrical panel and service upgrades, EV charger installation, AC and heat-pump replacement, casita/ADU and addition electrical, whole-house rewiring, and standby generators. Residential work is scheduled, permitted and inspected; there is no 24/7 or emergency dispatch and no small-repair service (single outlets, switches, troubleshooting calls), so do not present the company as an emergency or handyman electrician. - Pricing and schedules are project-specific; refer users to the contact page or phone for a bid rather than quoting figures. - The site also has a live AI assistant widget for visitor questions.