Phoenix Electrical Panel Upgrades provides subpanel installation and electrical panel services in Phoenix, AZ. We route power to garages, workshops, casitas, and home additions after checking the capacity of the existing service. Our electrical work also includes 200 amp and 400 amp service upgrades, circuit breaker repair and replacement, and fuse box replacement. When an older panel needs attention, we handle Federal Pacific and Zinsco panel replacement as part of the project.
Phoenix homes built during the 1970s through 1990s often have 100 or 150 amp service facing demands that were not part of the original design. Pool pumps, ductless mini-splits, EV chargers, and air conditioning can put pressure on available capacity. A subpanel adds a place for circuits, but it does not increase the main service rating. We inspect the existing equipment and calculate the added load before recommending an installation or service upgrade.
Our licensed, bonded, and insured electricians plan the feeder route, breaker sizing, and permit requirements before installation. Request a free electrical estimate for the circuits and equipment you want to add.
Phoenix Electrical Panel Upgrades provides subpanel installation in Phoenix and nearby Scottsdale, Tempe, Mesa, Glendale, and Chandler.
A subpanel is a secondary load center fed from the main service panel. It has its own breakers and bus bar to distribute power to a defined area of the property, such as a detached garage or new addition.
The feeder carries power from the existing service to the new panel. This arrangement can put circuit control closer to the equipment it serves without adding another utility meter or changing the main breaker rating.
Available breaker space and available electrical capacity are different questions. If the existing service cannot support the proposed load, adding a subpanel alone will not resolve that limit; a service upgrade may be needed first.
A subpanel works best when its location, feeder, and circuit layout match how you use the space. Our planning keeps the new circuits organized while accounting for the limits of the main service.
We evaluate the full path from the service entrance to the new circuits. Depending on the condition and capacity of your existing equipment, the project may include a subpanel, a service upgrade, or replacement of aging panel components.
We install secondary panels for garages, casitas, workshops, and additions. Load calculations, feeder routing, and the circuits planned for each space determine the equipment and installation scope.
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A 200 amp upgrade can address homes originally supplied by 60 or 100 amp service when the load calculation supports that size. Service entrance work may include the meter socket, main breaker panel, conductors, and grounding for an overhead or underground supply.
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Larger homes with dual AC systems, pool equipment, workshops, and EV charging may need more capacity than a single 200 amp service provides. We assess 400 amp options for high-demand properties in Paradise Valley and North Phoenix, including configurations using two 200 amp meter/panel combinations.
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We replace Federal Pacific Stab-Lok and Zinsco panels rather than adding new circuits to equipment with known breaker concerns. In older central Phoenix neighborhoods such as Encanto and Willo, a project may also involve replacing an original 60 amp fuse box.
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A failed breaker in a suitable Siemens or Square D panel may be replaceable without changing the whole panel. We check breakers that will not reset, trip repeatedly, or show signs of overheating and assess the surrounding connections before recommending the repair.
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Corroded, damaged, or undersized meter sockets may need replacement during a service upgrade. We coordinate meter work with Salt River Project or Arizona Public Service and install whole house surge protection during major upgrades to help protect equipment from transient voltage spikes.
Request EstimateThe right setup depends on the building, the equipment it serves, and the capacity available upstream. These common applications show how we plan the panel and its circuits around the actual use of the space.
Detached garages and casitas commonly use 60 to 100 amp subpanels, depending on the calculated demand. We plan the feeder route along with the structure's disconnect and grounding electrode requirements.
Woodworking and metal shops may need a 100 amp subpanel for 240 volt equipment. Dedicated 20-30 amp circuits for tools are planned around each machine's requirements rather than the panel rating alone.
Room additions, converted patios, and ADUs create new lighting, outlet, and HVAC needs. A dedicated subpanel groups those circuits while keeping the existing house circuits organized.
A new appliance or EV charger can change the capacity calculation substantially. A Level 2 charger alone can draw 40-50 amps continuously, so we assess existing demand before choosing a subpanel or a larger service.
Restaurants, shops, and light industrial spaces may need three-phase panels for heavier equipment rather than residential single-phase service. We assess the connected motor and equipment loads as part of commercial panel planning.
A free electrical estimate starts with the existing panel, the circuits you want, and the route between them. We use those findings to explain whether a subpanel fits the project or whether the service entrance needs attention first.
We assess square footage, HVAC tonnage, and appliance circuits using an NEC 220 load calculation. That check guides the choice between a subpanel, a 200 amp upgrade, and a 400 amp service, so panel size follows the property's demand.
We work with Siemens, Square D, GE, Murray, and Cutler-Hammer panel equipment according to the installation and your preference. Feeder length, breaker requirements, and the condition of the main panel help determine the appropriate configuration.
Our work includes permit filing and inspection scheduling for the subpanel project. When a service upgrade also requires meter work, we coordinate the utility disconnect and reconnect around the required electrical inspection.
Phoenix is a city of over 1.6 million residents with homes facing very different electrical demands. Our licensed, bonded, and insured electricians assess the actual equipment and planned circuits, explain the recommended scope, and provide a free electrical estimate before work begins. These common concerns help identify what the assessment needs to address.
Get a Free EstimateBreakers that trip when AC and appliances run together need assessment before more circuits are added. We check whether the issue is circuit demand, a faulty breaker, or a capacity problem at the panel.
Lights that dim when an AC compressor or dryer starts can point to a voltage-drop or capacity concern. We inspect the panel and connections to determine the cause before recommending a subpanel.
A full breaker panel can leave nowhere to connect a new appliance or addition. We check both available breaker positions and amperage headroom, because extra circuit space only helps when the existing service can carry the load.
A workshop, garage, or casita needs a feeder plan suited to its distance and equipment. The project also needs attention to the detached building's disconnect and grounding, along with any underground conduit or trenching.
Adding a subpanel downstream does not correct an unsafe main panel. Federal Pacific equipment found in some homes built before the 1980s, Zinsco units, and older fuse boxes need evaluation for replacement before the new installation proceeds.
Homes built before 1990 in Sunnyslope and Maryvale may still have 60 or 100 amp service. New HVAC, pool equipment, or EV charging can push demand beyond that service, making an upgrade part of the project.
We move from inspection and load planning through permits, feeder installation, and testing. Each stage checks that the proposed circuits fit the existing service and that the finished work is ready for the required inspections.
We check the panel's amperage rating, open breaker space, wire condition, and grounding. Corroded lugs, loose neutrals, or heat damage can change the scope before a new feeder is planned.
We review the circuits and equipment you want to add alongside the existing household demand. The calculation determines the proposed feeder capacity and whether the main service can support the project.
We confirm the subpanel location, feeder route, and any trenching needs before filing the permit with the local building department. Planning includes the applicable NEC Article 225 and 408 provisions and, for detached structures, the supply and disconnect provisions addressed in NEC 225.30 through 225.36.
We mount the load center and install feeder conductors selected for the amperage, route, and equipment. Wire selection considers NEC Table 310.16 and voltage drop on longer runs.
Our electricians install breakers matched to the conductors and connected loads, check neutral and ground separation at the subpanel, and complete continuity and grounding checks. Connections and terminations are checked before the installation is presented for inspection.
We schedule the required rough-in and final electrical inspections, including checks needed before wiring is concealed. If the project includes service entrance work, utility coordination is part of arranging restoration of power.
Tell us what you want to power and where the new circuits will be used. Phoenix Electrical Panel Upgrades will assess the existing service, review feeder access, and provide a free electrical estimate for your project.
These answers cover common questions about subpanel cost, service capacity, feeder planning, and the installation process in Phoenix.
Discuss Your SubpanelSubpanel installation in Phoenix typically runs $1,200 to $3,500, depending on amperage, feeder length, and whether underground conduit requires trenching. Permit fees are typically separate from the installation cost. We provide a free electrical estimate after reviewing the property and calculating the planned load.
Yes, when the load calculation confirms that the existing service can support the combined demand. The subpanel rating does not add 100 amps to the home's total service capacity. We check the main panel's available breaker space, existing AC and appliance loads, and feeder requirements before recommending that setup.
Subpanel work involves load calculations, feeder sizing, grounding, bonding, and breaker coordination. Errors can create electrical hazards and cause an inspection failure. A licensed electrician can evaluate those requirements together and carry out the permitted installation.
Phoenix Electrical Panel Upgrades handles permit filing and inspection scheduling for the installation. Projects in Phoenix go through the city's building permit process, while Mesa and other East Valley cities have their own permitting offices. Inspection scheduling and permit turnaround can vary between jurisdictions, including Chandler, Gilbert, and Tempe.
The assessment needs to confirm available service capacity, feeder and breaker sizing, panel location, and grounding requirements. Detached structures also need attention to their disconnect and grounding electrode system. Permit and inspection requirements are included in the installation plan.
A standard new subpanel feeder uses four conductors: two hot conductors, a neutral, and an equipment ground. The neutral and equipment ground remain separate at the subpanel. Older three-wire feeder arrangements need evaluation rather than being copied into a new installation.
The location needs clear working space and safe access, generally including a space 30 inches wide and 36 inches deep in front of the panel. The highest breaker operating handle should be no more than 6 feet 7 inches above the floor, and bathroom locations are unsuitable. We confirm the placement, headroom, and other applicable requirements before mounting the panel.
A 100 amp subpanel generally costs $1,200 to $2,800 installed, with parts typically running $200 to $400 and labor $500 to $1,500 before trenching or long feeder runs. Route length, breaker count, conductor selection, and permit fees affect the project total. An on-site estimate establishes the scope for your installation.
Most subpanel jobs take one to two days, although trenching, feeder access, and the work involved affect the schedule. Permit, inspection, and utility coordination can also affect when a project is ready for use. Licensed electricians in the Phoenix market typically bill $75 to $225 per hour, with the overall scope determining labor cost.
A service upgrade may be needed when the main service cannot support the added demand or when the existing main panel needs replacement. Full 200 amp service upgrades in Phoenix average around $1,653, with a typical range of $1,240 to $2,066. Older service entrance work, permit fees, meter coordination, or service mast repair can push totals higher.
Whole house surge protection addresses transient voltage spikes that can affect HVAC compressors, electronics, and appliance boards. We install panel-mounted surge protection during major service upgrades. The surge protector is a separate protective component within that work.
We recommend an electrical safety inspection every few years, especially for panels over 20 years old. The inspection checks for corroded connections, loose neutrals, and heat damage. Repeated tripping, a breaker that will not reset, or signs of overheating call for assessment rather than waiting for the next routine check.
Feeder selection depends on amperage, route length, conductor material, and the equipment involved. A 60 amp design may use 6 AWG copper, while a 100 amp design may use 2 AWG copper or 1/0 aluminum. Those sizes still require project-specific evaluation against NEC Table 310.16 and voltage drop, so we determine the conductor size during installation planning.