Panels and service
Subpanel
A subpanel is a smaller panel fed from the main panel. It adds circuits in a garage, shop or addition without a second utility service.
A subpanel gets its power through a feeder from the main panel, then splits it into new circuits closer to where they are used. Southwire notes that underground feeder cable suits separate buildings with sub-panels, such as a garage, shed or pump house.
The main panel must have room for the extra load, so a load calculation comes first. A subpanel is still a breaker panel with live parts inside. A licensed electrician should install it. See panel repair and replacement.
Related terms
Sources
TECL #21005 · Family owned since 1988
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