Code Question of the Day with Charlie Trout

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Code Question Of The Day

Thursday, July 28, 2011

Subject: Service Disconnects

If the intent of 230.71 is to limit to six operations of the hand the disconnection of all conductors of EACH service, how do you get around the statement: "There shall be no more than six sets of disconnects per service grouped in any ONE LOCATION" as shown in 230.71(A)? I have always been of the opinion that you may have six separate services in one location IF they each had only a single OCPD. I think I am hearing that you could have 36 OC devices for those six services in one location.




I think the wording is quite clear. Six disconnects PER SERVICE grouped in any one location. Yes, if for some reason you have six separate services in accordance with 230.2, you may have six disconnects for each service. 6x6 = 36 I believe this requirement is based on the presumption that it is highly unlikely that a problem is going to happen to more than one service at a time and if there is that much of a catastrophe then don't stand around disconnecting services. "Run Forrest Run!"


Section: 230.2, 230.71(*A)
Source: Charlie Trout

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ABOUT CHARLIE: Charles M. Trout, better known as Charlie, is 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.

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