Subpanel wire size

[karn]

I'm going to be installed this, I guess technically this would be considered a sub panel, it has a 50 amp double pole breaker, a 30 amp breaker and a 20 amp breaker with a 50 amp receptacle, a 30 amp receptacle and a 20 amp duplex. There are several existing ones already, I have noticed they all seem to be on 60 amp breakers with most of them being 6ga wire, could I use a 60amp breaker with 6ga wire to feed this new install with an approximate wire length of 155 feet?

 

[augie47]

Perfectly legal.
Looking at a 50 amp load, your voltage drop may be an issue. A #4 feed would possibly be a better idea.

(Please update your profile to show your relation to the industry)

 

[karn]

I was thinking 4 myself after using a 'voltage drop calculator' but my coworker was insisting on 6, when I asked why he just said because most of the others are 6, although some are 4s with a shorter distance but they seem to be feeding a subpanel, then spilt off to 6 to feed an additional subpanel,. I will try to update profile today, thank you

 

[petersonra]

Chances are voltage drop will not be much of an issue anyway. Just because there's a 50 amp plug doesn't mean it will be drawing 50 amps.

 

[karn]

Yeah I doubt it would rarely get much over 30, just wanted to make sure it was kosher

 

[scrubbin]

Question: This panel is an 80A RV/EV PNL W/50A, 30A & GFCI. Part Number: CESMPSC75GRHR. Connecticut Electric RV/EV Power Outlet. Outlets: NEMA 5-20R2 GFCI, TT-30 travel trailer receptacle, NEMA 14-50. Breakers:1P 20A, 1P 30A, 2P 50A. So should you not size the wire for 80A?

 

[augie47]

Question: This panel is an 80A RV/EV PNL W/50A, 30A & GFCI. Part Number: CESMPSC75GRHR. Connecticut Electric RV/EV Power Outlet. Outlets: NEMA 5-20R2 GFCI, TT-30 travel trailer receptacle, NEMA 14-50. Breakers:1P 20A, 1P 30A, 2P 50A. So should you not size the wire for 80A?

You would want to size the feeder to the load (not exceeding 80 amps).
It is rare for those RV panels to see loads in excess of 50 amps.

 

[Little Bill]

Question: This panel is an 80A RV/EV PNL W/50A, 30A & GFCI. Part Number: CESMPSC75GRHR. Connecticut Electric RV/EV Power Outlet. Outlets: NEMA 5-20R2 GFCI, TT-30 travel trailer receptacle, NEMA 14-50. Breakers:1P 20A, 1P 30A, 2P 50A. So should you not size the wire for 80A?

You could but this being an RV panel, it's unlikely that anything will get plugged in other than a single RV, either 50A or 30A.

 

[LarryFine]

How likely is it that more than one receptacle will be used simultaneously?

 

[karn]

True, probably not too likely

 

[retirede]

I could get more common in the future. F150 Lightning pulls in and plugs his camper into the 30 and his EVSE into the 50.