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Extreme heat on aging panels
Breakers and connections that run hot all summer degrade faster. Warm breakers, burning smells or AC circuits that trip need attention before the next heat wave.
Electrical Panel UpgradeLocal guide
The Phoenix electrical guide
History, housing, weather and rules that shape electrical work in Phoenix, AZ.
APS or SRP: which one serves you
Phoenix is split between two very different utilities. Salt River Project, a public power entity that also manages much of the Valley’s water, serves large parts of central and eastern Phoenix, while Arizona Public Service, an investor-owned utility, serves much of the north and west. The boundary zigzags through neighborhoods, so neighbors across the street can have different utilities, rate plans and solar rules. Your electrician will need to know which one you have before quoting a service upgrade or solar job.
Neighborhood notes
Encanto-Palmcroft, Willo and Coronado have homes from the 1920s through the 1940s, many in city historic districts, often with small services and wiring updated piece by piece. Arcadia is known for 1950s ranch homes on large lots that are still flood irrigated. Maryvale, built in the 1950s and 1960s, has thousands of modest tract homes on original panels. Ahwatukee grew in the 1970s through the 1990s, while Desert Ridge and Laveen are newer, with 200-amp services and pools.
Flood irrigation and outdoor equipment
In Arcadia and parts of central Phoenix, lots are flooded with irrigation water on a regular schedule. Outdoor outlets, landscape lighting transformers, pool equipment and AC disconnects mounted too low can end up in water. Raising equipment, using weather-resistant ground-fault devices and keeping connections out of the irrigation basin prevent shorts and shock hazards.
When the air conditioning fails
Heat-related deaths in Maricopa County reached record levels in 2023, and many happened indoors when cooling failed. A tripped AC breaker, a burned connection at the disconnect or a failed capacitor can turn a house dangerous within hours on a 115-degree day. Phoenix has also tightened rules requiring landlords to keep cooling working in rental units. Electrical problems affecting the air conditioner should be treated as urgent in summer.
Haboobs and monsoon wind
Towering dust storms called haboobs sweep across the Valley during monsoon season, followed by microbursts that snap trees and power poles. Wind-driven dust works into outdoor disconnects and panels, and falling palm fronds and eucalyptus limbs damage service drops. After a big storm, check the mast and outdoor equipment for damage.
Block walls and tile roofs
Most Phoenix homes have concrete block or stucco-over-frame walls and concrete tile roofs. Fishing new wiring through block walls is difficult, so electricians often route circuits through the attic and drop them down interior walls, or use neat surface conduit on exterior walls. Solar and roof-mounted conduit on tile roofs require careful flashing so monsoon rains do not leak through penetrations.
Permits in Phoenix and neighboring cities
Phoenix issues permits through its Planning & Development Department, but the metro is a patchwork of separate cities — Scottsdale, Tempe, Mesa, Chandler, Gilbert, Glendale, Peoria — each with its own permit office and rules. Unincorporated county islands add another layer. Your electrician should confirm the jurisdiction before pulling a permit.
Solar under SRP and APS
Rooftop solar is everywhere in Phoenix, but SRP and APS treat it differently, with different export credits, demand charges and battery programs. Many homeowners now pair solar with batteries to cover evening peaks. Any system requires a permit and approval from the specific utility before it is turned on.
Winter visitors and rentals
Phoenix fills with winter visitors from October through April, and many homes, casitas and rentals sit empty in summer. Owners commonly have AC circuits and surge protection checked before leaving and the panel and outdoor equipment checked on return.
Typical Phoenix electrical jobs
Common requests include AC circuit and disconnect repairs, panel upgrades, surge protection, solar and battery work, EV chargers, pool equipment bonding, ceiling fans and outdoor lighting.
Original panels in 1970s tract homes
Many Phoenix subdivisions from the 1970s and early 1980s still run on their original panels. After decades of summer air conditioning loads, breakers wear out and bus connections can overheat. Some homes from the late 1960s and 1970s also have aluminum branch wiring. A panel inspection before adding a pool heater, EV charger or second air conditioner prevents overload.
EV charging in hot garages
Phoenix garages can top 120 degrees in summer. EV chargers and their wiring must be rated for those conditions, and chargers mounted on west-facing walls or near water heaters run hotter still. Many owners schedule charging overnight, when garages are cooler and utility rates are lower.
Misting systems and outdoor living
Patios with misting systems, ceiling fans, outdoor televisions and kitchens extend living space through the hot season. These need outdoor-rated fixtures and outlets with ground-fault protection, and misters must be kept away from electrical connections.
Casitas and guest houses
Detached casitas are common on Phoenix lots, used for guests, home offices or extended family. Each needs a properly sized feeder from the main panel, its own air conditioning circuit and smoke alarms, and the main service must have room for the added load.
Pool pump upgrades
Arizona rules and utility rebates encourage variable-speed pool pumps, which save significant energy. Replacing an older pump is a good time to check bonding, ground-fault protection and the condition of the pool subpanel, which often sits in full sun.
Evaporative coolers in older homes
Some older central Phoenix homes still use evaporative coolers, especially for garages and workshops. Coolers need a dedicated circuit with a disconnect and should be checked when started up each spring.
Historic districts and older homes
Phoenix has dozens of historic districts, including Encanto-Palmcroft, Willo, Roosevelt and Coronado, where exterior changes are reviewed by the city’s Historic Preservation Office. Meter relocations, new service masts and rooftop solar visible from the street may need approval. Inside, these homes often have early wiring hidden in plaster walls and attics.
Spring is the time to prepare
Phoenix electricians are busiest once summer heat arrives. Scheduling panel inspections, AC circuit work and surge protection in March or April means the home is ready before the first 110-degree day, when a failure becomes an emergency.
Rental and investment homes
Phoenix has a large share of single-family rentals owned by investors. Between tenants, owners commonly fix damaged outlets, add ground-fault protection, update smoke alarms and repair AC electrical components before the next lease begins.
Lightning and surge protection
Monsoon lightning over the Valley is intense, and surges destroy AC control boards, pool automation and electronics. A whole-home surge protector at the panel is one of the least expensive upgrades a Phoenix homeowner can make.
