Between 1950 – 1965, the 60-amp electrical panel service became widely accepted and preferred. This panel was mounted inside a gray metal cabinet, It had two cartridge fuse blocks and four plug fuse blocks and featured a 240-volt feed. Late in the 1960’s, the circuit breaker was invented. It not only provides expandable circuit spaces, but also provides 240-volt, 100amp and 200amp services to residential. This panel allows you to supply power to, lighting, and sub panels. Circuit breakers were reusable devices, unlike the fuses that needed to be changed when they blew.
100amp panels are the min requirement in new home construction and electrical upgrades. There are some exceptions when a 60amp can remain in service.An existing 60 amp. 115-230 volt service may remain if: It is in good condition and It is not overloaded. If major electrical appliances are to be added or if additional circuits or greater electrical loads are needed, Section 220-31 of the NEC (National Electric Code) “Optional Calculation for Additional Loads in Existing One-Family Dwelling Occupancies” shall be used.
But, in reality… Most of our homes here are not under 500sqft and with today’s appliance loads from our HVAC systems and other units would not fall under these circumstances.
So, if your looking to add new appliances to your home. There is a very strong possibility you will be looking at a 100amp service panel upgrade. So what do you do next? 520-308-6235 We can come out to your home and measure the current loads your home is drawing and determine what size panel will meet your needs.