National Electrical Installation Standards

Standards as High as Your Own

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Wednesday, November 14, 2018

Question:

Re: CQD answer published Tuesday, October 30, 2018 -Small Appliance BCs

1) I very much enjoy the Code Question of the day. I am not sure I agree with your interpretation of this section. 210.52 are requirements in addition to those specified in (1-4). I am thinking a better way is to say that those specified in (1-4) shall not count as those required by this section and shall not be on the small appliance circuit. 210.52 (B) (2) states that the two small appliance branch circuits Shall have no other outlets. 210.52 does not require outlets for dishwasher or disposal. there are only two exceptions, electric clock or receptacle and receptacle for gas fired ranges. I know this section is a little ambiguous but it seems to me this is the intent. Thank you for all that you do!! Darren Benevento

2) Looking at 210.23(A) 2 would be my reference to not allow that. One 20A branch circuit would be installed to supply both the dishwasher and disposal. Thanks for the service you continue to provide. Gets the morning discussion going every day. Mike D.

A

Answer:

Hey Darren and Mike thanks for your comments and the compliments.

1) Receptacles that are described in 210.52 (1) through (4) do not count as the receptacle outlets required by the rest of 210.52 as you mention. But it does not specifically state that those receptacles cannot be supplied by the small appliance branch circuits. Section 210.52(B)(1) requires that all 15 and 20 ampere 125 volt receptacles in the rooms specified must be supplied by 20 ampere small appliance branch circuits. Receptacles used for dishwashers and waste disposals would likely be in those rooms. The small appliance branch circuits are not allowed to have any other outlets as stated in 210.52(B)(2) but it refers back to 210.52(B)(1) which refers back to 210.52(A) and (B) but does not specifically address the ones described in 210.52 (1) through (4). After all that providing a separate branch circuit(s) for a dishwasher and waste disposal is a much better approach and could be the intent. A Public Input for the 2023 NEC could help improve the wording.

2) You are correct, the total rating of the dishwasher and waste disposal must not be more than 10 amperes. That in it self might be enough to not allow it and it would be much better if those types of appliances are not supplied by the small appliance branch circuits so they would be reserved for the other types of kitchen appliances.

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ABOUT CHARLIE: Charles M. Trout, better known as Charlie, was a nationally known NEC® expert and author. He served on several NEC® technical committees and is past chairman of CMP-12. In 2006 Charlie was awarded the prestigious Coggeshall Award for outstanding contributions to the electrical contracting industry, codes and standards development, and technical training. Charlie was also a member of NECA’s Academy of Electrical Contracting. Charlie’s experienced team of industry experts keep the CQD dialogue and discussions active and informative in the spirit of the man himself, as he wanted.

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