100 Amp Sub Panel Wire Size Aluminum

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 rating of the panel does not determine the wire size or breaker size. First of all may i assume that you want to run a 2 pole 240v 100a feed.
100 amp sub panel wire size aluminum

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The cable must contain one or two hot wires depending on your needs one neutral wire and one ground wire.

100 amp sub panel wire size aluminum. Depends on the maximum ambient temperature the type temperature rating of the insulation and whether the conductor is copper or aluminum. Do i have to buy all 3 wires 2 hot and 1 neutral the same size. 11014c1a tells us that since were working with 100 amperes. For 100 amps the wire size that i would suggest using a 2 awg copper cable.

4 the nec allows a maximum of a 3 voltage drop on the main branch of a circuit at the farthest outlet of power and 5 total to both feeders and branch circuits to the farthest outlet. 03 22 2015 at 1007 pm. 1 3 thhnthwn 2 wire for 100 amp sub panel. 310 15b6is no longer an option.

If your calculated load is 67a then you must use 4cu and a 70a cb. Last edited by wpgshocker. 100 amp sub panel wire size 8 104 does say its continuous and the rating is the ocd or wire whichever is smaller. 100 amp is actually considered inadequate for todays residential use.

Single conductor 3 gauge thhn. In the us the nfpa70 national electric code nec table 31015b16 2014 says that 3awg copper wire w. You clearly have a sub panel and sect. Each wire should be 2 gauge in size.

What wire size for 100 amp sub panel 100ft in length form 200 amp main panel. 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. The calculator allows entry of a voltage drop but caution should be used when doing so to make sure you are calculating the wire sizes in accordance with nec article 210 19 fpn no.

Per the national electrical code nfpa70 that would require 1awg cable you want 13g cu nm for copper which is good for 110a or 10awg al 103g nm for aluminum o. Or can neutral wire be smaller size. The 200 amp is standard which calls for 20 copper cable. When determining feeder conductor size youll want to consider the lowest temperature rating of any connected termination conductor or device as per national electrical code nec article 11014cwhile the cablewire may be rated at 900c youll likely find that the terminals are rated at 750c or not labeled at all.