Can a 20a gfi be used on a 30a circuit w/#10 wire w/a 20a load?

[flatlander]

1) It says Class A, on the device yolk - Blow up bottom right diagram--

2) Does "Not listed" mean can't be AHJ approved in the field?

3) If 2-pole GFCI breaker won't fit in fuse box, HC-GFCI in deep 2G box / 1G P-Ring with this relay mounted to back of box

4) If no 15A/20A convenience circuit is available to control the 20A GFCI, add a fuse block

Let's see. Buy a specialty device,add relay,get a box,punch a Gfci slot,Mount all this stuff.wastr of time.
That's a hell of a lot work to Gfci a receptacle. Throw a breaker in the panel and be done. Way over thought.

 

[kwired]

I would expect that with the changes to 210.8(B) for the 2017 code, that a 30 amp GFCI receptacle will be available in the not too distant future. I can't imagine the wiring device manufacturers leaving that market to the breaker manufacturers.

Some following replies indicate that it won't be a class A device, without some changes to listing standards anyway, but what I was originally going to reply with was that there is so many more 5-15 and 5-20 receptacles being used they can be produced in higher volume with GFCI integrated into them and still sell as reasonable prices. I think if they started making 30 amp GFCI receptacles the number sold would be low enough that they would price themselves out of the market anyway.

I was suggesting using a dp gfci instead of a gfci receptacle. I didn't think there was a sp gfci breaker so I suggested a dp.

There are catalog numbers for 30 amp single pole GFCI's, you just never run into many applications where you need them in the past, and you won't see them in stock at a big box store unless the demand for them increases. Even supply house may not stock them or will not stock very many at a time I would guess.

 

[ramsy]

..Throw a breaker in the panel and be done. Way over thought.

What if there's no room for another 2-Pole breaker?

 

[kwired]

1) It says Class A, on the device yolk - Blow up bottom right diagram--

2) Does "Not listed" mean can't be AHJ approved in the field?

3) If 2-pole GFCI breaker won't fit in fuse box, HC-GFCI in deep 2G box / 1G P-Ring with this relay mounted to back of box

4) If no 15A/20A convenience circuit is available to control the 20A GFCI, add a fuse block

It is not actually UL listed at all, it is a UL Recognized Component, meaning it can be USED in another system as a comoponent for something that will then be itself listed

Inspectors do approve things, but they won't "list" something.

Use of that device with certain relays is part of what such listing will be all about. To be more like a typical 15-20 amp GFCI receptacle one would at least a two pole relay and open the neutral when "tripped". Evaluation of the contacts is likely critical, does no good to kill the coil and have the relay contacts welded together - it won't interrupt the voltage.

 

[curt swartz]

What if there's no room for another 2-Pole breaker?

30 amp singe pole GFCI breakers are available.

If necessary I would add a small single circuit breaker enclosure to create space for the breaker. A much cleaner, simpler and UL listed way vs a DIY system.

 

[flatlander]

What if there's no room for another 2-Pole breaker?

Adding a small breaker panel is cheaper and more practical than the latter mess.

 

[JFletcher]

What if there's no room for another 2-Pole breaker?

See the last line of post #5.

 

[kwired]

What if there's no room for another 2-Pole breaker?

Cut it in half