What is Main Electrical Panel?
Plain-English explanation from a licensed Utah HVAC, plumbing, and electrical contractor.
The main panel (or 'service panel,' 'load center,' 'breaker box') is the central electrical distribution point in your home, where utility power comes in, is metered, and is divided into the individual circuit breakers that protect each room and appliance.
Full Definition
The main electrical service panel is a metal enclosure containing the main service disconnect breaker, the bus bars that distribute power, and the branch-circuit breakers protecting each circuit. Residential panels are rated by their main breaker amperage: 100A was standard pre-1980, 150A and 200A became standard in modern construction, and 320A or 400A is increasingly common in homes with electric vehicle charging or all-electric heating.
Many Utah homes built before 1995 have 100A panels that can no longer support modern loads (electric ranges, EV chargers, heat pumps, hot tubs). Federal Pacific Stab-Lok, Zinsco, and Challenger panels are also widely recognized as unsafe and should be replaced regardless of age.
Common Questions
How do I know if I need a panel upgrade?
Signs include: panel labeled FPE, Zinsco, or Challenger; tripping breakers; no room for new circuits; planning an EV charger or heat pump install; insurance carrier flagging the panel age. A licensed electrician can give you a no-obligation assessment.
What's the cost of a panel upgrade in Utah?
We don't list explicit prices online to avoid misleading you, costs depend on amperage upgrade, meter relocation, service-entrance wire condition, and utility coordination. Schedule a free assessment and we'll give a firm written quote.
Related Terms
Service Disconnect
The service disconnect is the main breaker (or fused switch) that disconnects all power coming into your home, it's typically a 100A, 150A, or 200A breaker at the top of your electrical panel.
EV Charger
A Level 2 EV charger is a 240-volt circuit and wall-mounted unit that adds 20-40 miles of range per hour of charging, about 5x faster than the 120V Level 1 cord that ships with most EVs.
Recent ELECTRICAL work in Utah
A few installs and service calls from the AYSP crew.
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