I am running a cable wire with no conduit 50 feet from the panel box. I have heard some say 6 gauge is OK where I want to buy the cable they are telling me 4 gauge.

Need #4 copper if a cable, such as Romex ,or SE.

Just curious, TK is rarely incorrect on things, so I am wondering about the thinking behind #4cu.

#6cu in NM or SE cable must use the 60 deg C column in 310.16.
In this column #6 is rated for 55A. Since there is no 55A breaker we can round up to 60A.
Unless the actual full load is 56-60A I would say #6cu is fine.

If manufacturer is recommending a 60 amp breaker, I would assume unit takes more then 50 amps to start and run.

I am not an electrician, but agree with TK. Use #4 copper.

Chuck

Sorry. I hit the agree button instead of the quote button. No big deal.



If manufacturer is recommending a 60 amp breaker, I would assume unit takes more then 50 amps to start and run.

I am not an electrician, but agree with TK. Use #4 copper.

ChuckThis is fine, but what do you base it on?
Even if it takes 90A to start, this is figured into the equation. Like I said, if the running amps are under 56 than #6 will be fine. At only 50' the distance is not at a consideration.

Knowing that TK certainly knows what he is talking about I was just curious as to why he suggests #4.