20 amp circ to under sink dw/disposal?

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ritelec

ritelec

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Just the dishwasher's going in for now,
Instead of a 15 amp circ. I brought over a 20 in case he wants to add a disposal in the future.

Does an installed receptacle on the "20 amp" breaker, chord connection to the DW protect the DW as required ???

Thank you
 
ritelec said:
Just the dishwasher's going in for now,
Instead of a 15 amp circ. I brought over a 20 in case he wants to add a disposal in the future.

Does an installed receptacle on the "20 amp" breaker, chord connection to the DW protect the DW as required ???

Thank you
Click to expand...


The DW is fine on a 20A circuit provided its a GF/AFCI breaker, depending on your code cycle.

We've always put in 20A circuits for them.
 
you're welcome. most DW are hardwired so you arent going to be able to connect it via a cord to a receptacle. We usually leave ~6' of #12 NM coiled up on the floor where the DW goes, that way there is enough slack to remove it w/o undoing the connection.
 
Considering the reason the DW GFCI requirement was put into the NEC I would use a GFCI.
 
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The job was oked for last code cycle.

I may go for the gfci

But if not. Would a duplex be permissible or does it have to be a single.


Also. I've always hard wired to the breaker. And recently installing a switch under the sink and hard wire.


Using a plug and cord. In the 20 amp circuit I'm guessing the chord can be appliance size 14.

I'm at Home Depot. They have appliance size 16 with a disposal pic on the box. One end striped the other with plug. Would that be sized for dw?

The 14's I see are not striped at female end.
Is installing a 14 appliance cord and removing the female end and hardwiring ti dw acceptable ??

Thank you
 
JFletcher said:
you're welcome. most DW are hardwired so you arent going to be able to connect it via a cord to a receptacle. We usually leave ~6' of #12 NM coiled up on the floor where the DW goes, that way there is enough slack to remove it w/o undoing the connection.
Click to expand...

??
Maybe I'll do a switch again and hardwire with nm. ??
 
Or maybe the gfci :- )


Single receptacle ?? If a single on the 20 amp circuit it would need to be a 20 amp single recpt then ?
 
iwire said:
Considering the reason the DW GFCI requirement was put into the NEC I would use a GFCI.
Click to expand...

Good point. I'm trying to find the NJ amendment that still allows for a single receptacle to be used in lieu of GFCI protection.
 
Now are we sure that only a single circuit can be used?
I think most dishwashers would utilize more than 1/2 of the available ampacity of the circuit so doesn't that constitute an additional circuit be ran to pick up the garbage disposal?
 
JFletcher said:
you're welcome. most DW are hardwired so you arent going to be able to connect it via a cord to a receptacle. We usually leave ~6' of #12 NM coiled up on the floor where the DW goes, that way there is enough slack to remove it w/o undoing the connection.
Click to expand...

I would not say most DW's are hardwired. I have been in the trade for 33+ years and have never seen a hardwired residential dishwasher in the Bay Area.

Most of the projects we work on end up with European style dishwashers (Miele and Bosch). They come with factory cords and don't have a J-box under the appliance for hard-wiring.
 
infinity said:
Good point. I'm trying to find the NJ amendment that still allows for a single receptacle to be used in lieu of GFCI protection.
Click to expand...
Probably in the NJ Rehab Code if you're doing a remodel. I thought if it was new construction you still had to GFCI/AFCI protect it. The last time I hardwired a DW the EI told me I had to install a breaker lock for it. So, I've been cord and plug attaching DW's ever since as long as they're installed adjacent to the sink cabinet.

As far as installing a switch for the disposal, if the HO buys a batch feed type unit, once you insert the drain cap and twist it the disposal comes on.. If you'd rather use a switch then using an GFCI/AFCI breaker will allow you to split wire a std. duplex receptacle. Too much work as far as I'm concerned.
 
goldstar said:
Probably in the NJ Rehab Code if you're doing a remodel. I thought if it was new construction you still had to GFCI/AFCI protect it. The last time I hardwired a DW the EI told me I had to install a breaker lock for it. So, I've been cord and plug attaching DW's ever since as long as they're installed adjacent to the sink cabinet.

As far as installing a switch for the disposal, if the HO buys a batch feed type unit, once you insert the drain cap and twist it the disposal comes on.. If you'd rather use a switch then using an GFCI/AFCI breaker will allow you to split wire a std. duplex receptacle. Too much work as far as I'm concerned.
Click to expand...

The AFCI requirements in the 2014 NEC for kitchens and laundry areas have been removed from the NJ code. An inspector told me that the single receptacle was still permitted in lieu of GFCI protection under the sink.
 
infinity said:
Good point. I'm trying to find the NJ amendment that still allows for a single receptacle to be used in lieu of GFCI protection.
Click to expand...
There isn't one, 210.8(D) was adopted without modification so a GFCI protected circuit is required. Just be careful if the dishwasher recommends a dedicated circuit then there would be a problem with sharing it with a disposal.
 
RICK NAPIER said:
There isn't one, 210.8(D) was adopted without modification so a GFCI protected circuit is required. Just be careful if the dishwasher recommends a dedicated circuit then there would be a problem with sharing it with a disposal.
Click to expand...

After checking the NJ amendments again I agree with you that the GFCI protection is required. I will correct my earlier post.
 
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