Subpanel Wiring Sizes The wiring feeding the subpanel must match or exceed the rated circuit breaker size, not the calculated load of the subpanel. That means that if the breaker is rated for 50 amps, the feeder cable wiring should be rated for 50 amps or more.
How do I know what size feeder wire to use?
Determine the minimum feeder conductor size, before you apply any conductor adjustment and/or correction factors, by adding the two following quantities: 125% of the continuous load [215.2] and 100% of the noncontinuous load.
What size wire do I need for a subpanel?
The cable you run from the main panel to the subpanel also depends on the amperage rating. You can use 10 AWG, three-conductor wire for a 30-amp panel, but for a 60-amp one, you need 6 AWG wire. If you’re installing a 100-amp panel, you need 4 AWG copper or 2 AWG aluminum three-conductor cable.
What size wire is needed for a 50 amp sub panel?
6 AWG Wire
6 AWG Wire Used For 50 Amp Service.
What size wire do I need for a 125 amp sub panel?
125A is #1 copper or #1/0 aluminum (you need to call it 120A feeder, but you get to round up to 125A breaker since 120A is not made.) If you need full declared 125A you’d need 2/0 aluminum.
What size wire is used for a 100 amp subpanel?
The cable must have a wire gauge sufficient to the amperage of the subpanel—a 100-amp subpanel requires #4 copper wires or, more commonly, #2 aluminum wires, for example. (Aluminum is often used for feeder cables because the cost is typically much lower than that of copper wires.)
What size wire do I need for a 200 amp service?
For a 200 amp service, you’ll need: #2/0 copper wire, or. #4/0 aluminum or copper-clad aluminum wire.
What size wire do I need for 30 amps at 200 feet?
A 4 AWG wire is ideal for conducting 30 amps of current over 200 feet.
Will #2 wire fit in a 100 amp breaker?
When it comes to the lines connecting master and secondary panels, where the line will carry as much as a full 100 amps, use a 2-gauge non-metallic sheathed electrical cable. The cable must contain one or two hot wires depending on your needs, one neutral wire, and one ground wire. Each wire should be 2-gauge in size.
Can a 60 amp breaker feed a 100 amp sub panel?
You can feed a 100 Amp panel with a 60 Amp breaker. Keep in mind that the sub panel needs to be rated above the breaker size.
Can you run a 100 amp sub panel off a 100 amp main panel?
Let me try and answer some of your questions. First the panels you are looking at that are rated 100A simply means you can use them for any application up to 100A. You can for example add a 60A breaker to your existing panel and protect the new subpanel with a 100A rating.
