Wire for 50A 220V Service - 110' run

LittleBill wrote:

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

Thanks Littlebill, some jurisdictions will not allow AL use in a residence for branch circuits. You are lucky. My county will, but I will not use it. The county just north of will not allow it period for branch circuits. Just for argument I remember one job where we had to run a #2 THHN copper for a 30amp 3 phase 208vY circuit 350' just to keep voltage drop within limits. Have a good day SIR