Electrical Sub Panel Sizes

Subpanels are rated in terms of how much power they can safely monitor.

Electrical sub panel sizes. Installing a sub panel for a garage electrical question. When planning the wire size for a sub panel or any panel for that matter it is important to factor in the length of the distance to the panel from the source and the amperage of the sub panel. I currently have power ran out to my garage however it only runs 2 lights and the wiring is old. This is where the power feed from the utility company first enters the home from the meter and the point at which all the power is distributed to the various branch circuits of the house.

Sub panels are best when multiple circuits are needed in a single area separate from your main house such as a workshop or greenhouse. The heart of a home s electrical system is the main circuit breaker box also known as the main service panel. A sub panel is a smaller electrical panel that services a specific area of the home. Run the conduit from the garage to the main panel box.

Best seller square d homeline 125 amp 12 space 24 circuit indoor main lug plug on neutral load center with cover ground bar value pack. A subpanel is often installed in a barn workshop garage or other addition to a home. To calculate the required wattage rating needed to supply the subpanel multiply the total wattage from the square footage and appliance calculations times 1 25 to get the adjusted load this safety adjustment is required by the national electrical code and provides a buffer for voltage drop on the feeder circuit. It holds separate circuit breakers from the main breaker panel.

In order to select the proper size subpanel you must calculate. Dig an 18 inch deep trench for the outdoor electrical wire which you will run from the main panel box to the garage sub panel. It s usually located near the area it powers. The circuit loads placed upon the sub panel will determine the size of the sub panel as well.

An electrical subpanel installs downstream from a home s main breaker panel. Calculating subpanel wattage. Voltage drop is a loss of voltage that occurs. Use 1 1 4 inch pvc conduit for a 100 amp sub panel or 1 inch pvc conduit if the sub panel is 50 amps or less.