What Size Wire For 100 Amp Breaker Panel

310 15 b 6 is no longer an option.

What size wire for 100 amp breaker panel. Steve purchased our 6 awg thhn thwn copper building wire for his project. I put in a 100a box in the new shop but am only feeding it from a 50a breaker in the main panel from the house. What size wire for 100 amp sub panel from a 200amp. 1 3 thhn thwn 2 wire for 100 amp sub panel.

Or can neutral wire be smaller size. What wire size for 100 amp sub panel 100ft in length form 200 amp main panel. This is pretty clear that 4 4 4 6 copper is good for 100 amps to a sub panel by table 310 15 b 7. First of all may i assume that you want to run a 2 pole 240v 100a feed.

When installing a 100 amp sub panel you will need to use either 4awg american wire gauge copper cable or 2 awg aluminum three conductor cable. Single conductor 3 gauge thhn. Each wire should be 2 gauge in size. Is where the service was that fed the breaker panel in the basement.

If your calculated load is 67a then you must use 4cu and a 70a cb. What s also important is using the correct size wires to feed the sub panel. The wire from the 60 amp breaker must be 6 or larger. 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 electrician will also bring all the tools and materials necessary for adding the subpanel so finding the right size wire for the 100 amp subpanel shouldn t be your concern. Here is what steve had to say. Do i have to buy all 3 wires 2 hot and 1 neutral the same size. Generally when installing a 100 amp sub panel it would be connected by a 100 amp breaker.

Looking for the right size wire for your 100 amp sub panel for a detached building garage or shed. You must size the wire for the load to be served. So the wire that ran between the main and the breaker panel through the garage could be downsized. The rating of the panel does not determine the wire size or breaker size.

Steve needed to run 50 amp service from his main panel in his home to a 100 amp breaker box shown below in his new shop. Final result the main breaker shouldn t look much different than before the exception being the addition of the new subpanel. Yes you can use a 60 amp breaker to feed a 100 amp sub panel. You will not be able to draw the maximum 100 amps from the panel you will be.