View Full Version : Comp trailer power question

07-27-2013, 03:28 PM
I have a cargo trailer with 30 amp peer with breaker box. With a 25 ft cord attached for shore power. Not sure what gauge wire it is off hand. What size wire do I need if I want to add a 50ft ext cord to the existing 25 ft cord? So I don't drop voltage to the point of damaging the AC.

Captain Caveman
07-27-2013, 08:43 PM
This is the calculator that I use:

07-27-2013, 09:23 PM
I made an 75' 8 ga. cord for our camper at the Royal. I don't think I'd go smaller in case you're running more than the A/C.

07-28-2013, 06:28 AM
You want to use 8 gauge wire. 30 amps is 10 gauge wire and with distance for voltage drop and only going 75 feet . Need to up size wire to #8