[LRing]

I'm running a line for a new sub panel for an outdoor hot tub. The company (Hot Springs) provides the sub panel with GFCI breakers (20 & 30 amps).

I have a main panel with Eaton BR AFCI breakers in a newly built home.

Do I need a 50amp AFCI breaker in the main panel if I have GFCI breakers in the sub panel? If so, will a GFCI work just as well?

I have to say, I'm having a hard time finding a 50 amp Eaton BR AFCI breaker. I don't mind spending the extra $100 for a lifetime of safety and piece of mind.

 

[Wiredindallas]

The circuit feeding the sub panel needs not be AFCI, just a regular breaker.

 

[LRing]

Thank you! Is that because the sub panel breakers already provide the protection for the whole circuit?

 

[Oso954]

No, both devices only protect downsteam.

There is a difference between Arc Fault Protection and Ground Fault Protection.
https://www.ssf.net/home/showdocument?id=2410

 

[Wiredindallas]

Thank you! Is that because the sub panel breakers already provide the protection for the whole circuit?

AFCI is not required to feed the sub panel because that circuit (feeder) is not listed as requiring AFCI.

 

[LRing]

Understood. Exterior equipment and sub panel feeders do not require AFCI protection per NEC.

That said, is there a safety/fire prevention benefit to having that level of protection?

 

[Luke M]

As far as I know, there's not really anything on the market for protecting feeders. They make 50A GFCIs, but they are intended for branch circuits. Might get nuisance tripping if you used it on a feeder. The best protection would be to install the feeder in tubing, as opposed to using a cable.

 

[LRing]

Thank you Luke. That makes perfect sense, since I have been unable to locate a 50amp AFCI anywhere, including online, home centers, and electrical supply houses, although I still had a couple more in my area to check.

I have run wires through plastic #40 conduit to the sub-panel. My neighbor, a retired master electrician, is going to take a look at it in a couple of days.

Appreciate the response.