Forum Discussion

Water-Bug's avatar
Water-Bug
Explorer II
Nov 25, 2014

How Long is Safe for an RV Power Extension Cord

I know that the answer depends on the current draw of the RV, but am wondering if it would be safe to run the AC on a 100 ft 30 amp cable. The answer is probable to turn on the AC and measure the vol...
Seeking Advice
KD4UPL's avatar
KD4UPL
Explorer II
Nov 26, 2014
I've run my AC on 125' of #12 cord plus the camper's aprox. 30' of #10 cord. I don't remember the voltage at the RV but it was around 110 I think. Everything worked fine. I don't see how you could have a problem with 100' of #10 unless you try to run the AC, microwave, toaster, etc. all at the same time.
My voltage drop calculator says that with 125' of #10 at 30 amps starting with 120v you would loose 7.9 in the run. Not really desirable but shouldn't hurt anything.

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