Main Distribution Panel Sizes

Based only on apparent panel size and provision for 24 circuits this larger panel at left showing a modern main cb at the top and two 12 breaker columns is at least a 100 amp box maybe 150 amps.

Main distribution panel sizes.

Round up your total amperage number to the nearest panel size. Residential main breaker panels are available in four sizes 100 amps 125 amps 150 amps and 200 amps. Here we look at the load centers the distribution center or main panel and smaller subpanels used to hook up and control the various electrical circuits. The main service panel is the distribution center that splits the main electrical service into individual branch circuits that run through your home to power the lights outlets and individual appliances.

The main service panel is usually a gray metal box located somewhere along the inside surface of an exterior wall. Main panels come in scores of sizes and configurations. A distribution board also known as panelboard breaker panel or electric panel is a component of an electricity supply system that divides an electrical power feed into subsidiary circuits while providing a protective fuse or circuit breaker for each circuit in a common enclosure normally a main switch and in recent boards one or more residual current devices rcd or residual current. However if we add our pv breakers into a sub panel that is dedicated to only the pv breakers we can land the sub panel into a 40a breaker in the main panel board 10 4a 21a 31 4a x 1 25 39 25a.

Divide the total wattage by 230 as per the nec for total amperage of 135 2173 31 100 230 135 2173. Identify 100 amp circuit breaker panels.