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Electrical help

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May 16, 2022, 03:05 PM
old rugged cross
Electrical help
I need some help from my electrical friends here. What gauge wire do I need for a 30 amp RV plug.
It's going to have a male 30 amp round plug on one end might be about 12 ft long Max and it'll have the black white and green wires that will wire into my circuit breaker box on my trailer. I was told 10 gauge. But the plug I'm replacing which has a bad end on it. Koseems like it's quite a bit heavier but it's a 25-ft plug as well .Thanks guys



"Practice like you want to play in the game"
May 16, 2022, 03:12 PM
Shaql
How much power are you putting through it?

Power Needed is <35A Get 10/3 wire (10 gauge).
Power Needed is >35A but <50A, Get 8/3 Wire (8 Gauge).




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Bart: Alright, we'll settle this like men, with our fists.
Hedley Lamarr: Sorry, I just remembered . . . I am armed.
May 16, 2022, 03:13 PM
old dino
I recently wired my daughter's house with 10 gauge 30 amp for her little dryer ... would think the same.

Here is a chart :

https://www.cerrowire.com/prod...ors/ampacity-charts/
May 16, 2022, 06:10 PM
old rugged cross
Thank you guys. That was really helpful. I appreciate it



"Practice like you want to play in the game"
May 16, 2022, 09:15 PM
sigcrazy7
Generally 10awg, but other factors can change it. You lose about 3% for every hundred ft, so if it’s a long run from your panel, you should go one size larger (8awg) to mitigate the voltage drop.


Demand not that events should happen as you wish; but wish them to happen as they do happen, and you will go on well. -Epictetus
May 16, 2022, 09:42 PM
Stlhead
If the old cord is long enough now, why not just cut a few inches off it and install a new male plug?
May 17, 2022, 01:15 AM
JAB
quote:
Originally posted by old rugged cross:
I need some help from my electrical friends here. What gauge wire do I need for a 30 amp RV plug.
It's going to have a male 30 amp round plug on one end might be about 12 ft long Max and it'll have the black white and green wires that will wire into my circuit breaker box on my trailer. I was told 10 gauge. But the plug I'm replacing which has a bad end on it. Koseems like it's quite a bit heavier but it's a 25-ft plug as well .Thanks guys



Remember that your RV AC power is 120 volt only. Be careful and don't run 220 volts to your RV or you will fry it.