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Monday, January 23, 2023

Question:

Hello CQD. Can Table 220.55 be used to calculate the branch circuit load for any combination or quantity of appliances, or is it limited to what is permitted in Note 4? Thanks, Erik Kruck
A

Answer:

Hi Erik, thanks for your question. Section 220.55 and the application of Table 220.55 are limited to the following household cooking appliances:

-        Household electric ranges

-        Wall-mounted ovens

-        Counter-mounted cooking units

-        Other household cooking appliances rated in excess of 1¾ kW.

 Note 4 provides some specific conditional requirements for certain applications:

-        It permits the branch-circuit load for one (1) range to be calculated using Table 220.55.

 -        It specifies that the load of one (1) wall mounted oven or one (1) counter-mounted cooking unit shall be determined by the nameplate value.

 -        It permits the load for one (1) counter-mounted cooking unit, and not more than two (2) wall-mounted oven(s), all supplied from a single branch circuit and located in the same room to be calculated by adding all of the nameplate values together and treating that value as a single electric range.

 Note 4 can only be applied using the combinations listed in the note.

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CHARLIE TROUT: 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. Even though Charlie passed away in October of 2015, his work continues in spirit. NECA continues to maintain this question forum for its many subscribers in memory and recognition of all his significant contributions to making the NEC what it is today.

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