Wire for 50A 220V Service - 110' run

PaulJ2 wrote:

SolidAxleDurango wrote:

hughesjm21 wrote:
I hope you are not thinking that you need 220v for an rv. They use 120 v , 50a.

Please refrain from offering electrical advice.

Well--yes and no. 50 amp rv service is two lines of 120V each, 180 degrees out of phase with each other. 220V across them, however the rv's use each line of 120V separately for about half the things inside the rv.
Only things that might use 220V would be a clothes dryer, water heater, or electric furnace. My experience.

well i guess my house is 400 amp 120v?????


this is stupid if the circuit can provide 220-240. its a 220-240 circuit. rv 50amp is 50a/240v. no matter how you look at. regardless of what is used in reality on the circuit

westend wrote:

john&bet wrote:
Well, just do as you want as you are on the hook if it is wrong as no one here has given you a clear concise engineered answer as to why it is very wrong or very right to do. I bet 99% of those who answered to not use AL do not know what is feeding thier house thru underground service. Just my opinion is that most of the answers make me sick. JMHO.

Well that's pretty gol durn judgemental, a few guys have shared their opinions on it and the reasons why. Besides the connectivity/splicing issues, #6 AWG UF/TW aluminum is not rated for 50 amp service.

Call it what you want. The truth may hurt. I wire my stuff according to the rules and have been for over 50 years. I don't ask here how to do it, to many wrong opinions. JMHO.

SolidAxleDurango wrote:

hughesjm21 wrote:
I hope you are not thinking that you need 220v for an rv. They use 120 v , 50a.

Please refrain from offering electrical advice.

Well--yes and no. 50 amp rv service is two lines of 120V each, 180 degrees out of phase with each other. 220V across them, however the rv's use each line of 120V separately for about half the things inside the rv.
Only things that might use 220V would be a clothes dryer, water heater, or electric furnace. My experience.

westend wrote:

john&bet wrote:
Well, just do as you want as you are on the hook if it is wrong as no one here has given you a clear concise engineered answer as to why it is very wrong or very right to do. I bet 99% of those who answered to not use AL do not know what is feeding thier house thru underground service. Just my opinion is that most of the answers make me sick. JMHO.

Well that's pretty gol durn judgemental, a few guys have shared their opinions on it and the reasons why. Besides the connectivity/splicing issues, #6 AWG UF/TW aluminum is not rated for 50 amp service.

not really judgemental, just a true statement. you are right about the undersized wire for the AL.

that being said, every single service entrance wire both above ground and underground i have ever seen is AL for residential. so i don't understand the hatred either. its very rare to see people use copper over 6 guage in any long distance run. my dryer is on AL,with no issues.

when i went to a 100 amp subpanel, guess what i used. HD doesn't even sell copper for that size, at least not in ROMEX, i believe they had THHN

hughesjm21 wrote:
I hope you are not thinking that you need 220v for an rv. They use 120 v , 50a.

Please refrain from offering electrical advice.

john&bet wrote:
Well, just do as you want as you are on the hook if it is wrong as no one here has given you a clear concise engineered answer as to why it is very wrong or very right to do. I bet 99% of those who answered to not use AL do not know what is feeding thier house thru underground service. Just my opinion is that most of the answers make me sick. JMHO.

Well that's pretty gol durn judgemental, a few guys have shared their opinions on it and the reasons why. Besides the connectivity/splicing issues, #6 AWG UF/TW aluminum is not rated for 50 amp service.

Well, just do as you want as you are on the hook if it is wrong as no one here has given you a clear concise engineered answer as to why it is very wrong or very right to do. I bet 99% of those who answered to not use AL do not know what is feeding thier house thru underground service. Just my opinion is that most of the answers make me sick. JMHO.

The four-wire is copper.

GM

BurbMan wrote:
You need FOUR conductors: 2 hot legs at 120v each, a neutral and a ground.

Grey Mountain wrote:
Currently, there is a four-wire shielded 8 AWG buried cable running from the breaker box to the barn

The unknown is if the 4 are copper or aluminum.
If copper I would go 40a breaker. But 30a is fine.
Might need NEMA 14-30 connector to meet code and make an adapter for the RV.

Hi

I'm sure smkettner intended to say "use thirty amp breakers". That would double the existing power and be far better than a 30 to 50 dog bone, at a very low cost, since it is a four wire run.