Wire size distance advice

Old 08-18-17, 04:36 PM
Thread Starter
Join Date: Aug 2017
Location: USA
Posts: 18
Upvotes: 0
Received 0 Upvotes on 0 Posts
Wire size distance advice

I have to run a 20 amp 120v dedicated circuit for a pair of wine coolers. The problem is the distribution box is on the far side of the garage and the wall the outlet will go on is about 20 ft away. Say there is 20 ft of up and down and side to side for the run I would guess the wire is going to be 100 ft long.

The coolers normally run at 2.8 amps so really no problem. The rep tells me the surge will be 10 amps each and if both coolers cycle at the same time. If I use 12-2 there could be a problem with voltage loss over the length of the run. How does one calculate the drop to know If I need to use 10-2 or 12-2 wire for this project?
Old 08-18-17, 04:41 PM
pcboss's Avatar
Forum Topic Moderator
Join Date: Jul 2002
Location: Maryland
Posts: 13,985
Received 199 Upvotes on 174 Posts
Wire length is not an issue at that distance . Just use the 12.
Old 08-18-17, 06:29 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 65,401
Received 4,046 Upvotes on 3,630 Posts
It would be highly unlikely that both compressors started at the exact same time but even if they did.... a 20A circuit breaker has enough delay to start them without tripping.

I agree with the Boss..... #12 is fine for that application.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: