Main Distribution Panel Sizes

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.

Main distribution panel sizes.

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. Your main circuit panel should equal 150 amps. A panel might be mounted on the outside of the house. Better check the service conductors main cb and panel label.

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. Divide the total wattage by 230 as per the nec for total amperage of 135 2173 31 100 230 135 2173. 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. 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.

Identify 100 amp circuit breaker panels. Round up your total amperage number to the nearest panel size.