Does anyone have the ROP that eliminated Exception No. 2 to Section 445-5 in the 1999 Code cycle? The basic rule requires conductors from the genrator terminals to the first overcurrent device to have an ampacity not less than 115% of the nameplate current rating of the generator. Exception No. 2 exempted the generator manufacturer's leads that supplied overcurrent devices that were an integral part of the generator set assembly. Does anybody know why?
1999 NEC, 445-5 Exception No. 2
- Thread starter RB1
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- Massachusetts
I am sorry I do not and the NFPA's web site does not seem to have it either.
My guess would be that the exception was not needed as the NEC would not apply to the internals of a listed assembly.
My guess would be that the exception was not needed as the NEC would not apply to the internals of a listed assembly.
dana1028
Senior Member
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- San Francisco Bay area
I found this on an old disk - doesn't seem to say much about why X-2 was deleted.
National Electrical Code? Committee Report on Proposals
This Report on Proposals is published for public review and comment prior to consideration at the NFPA Annual Meeting in Cincinnati, OH, May 18-21, 1998.
15- 9a - (445-5): Accept (Log #CP1502)
SUBMITTER: CMP 15
RECOMMENDATION: Delete Exception No.2 following Section 445-5, and add existing Exception No. 3 following Section 445-5 as a new last sentence to Section 445-5. The existing Exception No.1 remains.
SUBSTANTIATION: Action is to follow Technical Correlating Committee direction to reduce the number of exceptions, and make the document more user friendly.
PANEL ACTION: Accept.
NUMBER OF PANEL MEMBERS ELIGIBLE TO VOTE: 19
VOTE ON PANEL ACTION:
AFFIRMATIVE: 19
National Electrical Code? Committee Report on Proposals
This Report on Proposals is published for public review and comment prior to consideration at the NFPA Annual Meeting in Cincinnati, OH, May 18-21, 1998.
15- 9a - (445-5): Accept (Log #CP1502)
SUBMITTER: CMP 15
RECOMMENDATION: Delete Exception No.2 following Section 445-5, and add existing Exception No. 3 following Section 445-5 as a new last sentence to Section 445-5. The existing Exception No.1 remains.
SUBSTANTIATION: Action is to follow Technical Correlating Committee direction to reduce the number of exceptions, and make the document more user friendly.
PANEL ACTION: Accept.
NUMBER OF PANEL MEMBERS ELIGIBLE TO VOTE: 19
VOTE ON PANEL ACTION:
AFFIRMATIVE: 19
Thanks guys. I am in the process of drafting a Comment for the 2011 Code. 700.9(B)(5) allows separate breaker enclosures to be supplied from a single feeder without overcurrent protection at the generator. I can find no provision that will allow conductors sized less than 115% of the generator nameplate current rating to supply the separate enclosures. In a typical system with large optional loads and small emergency loads this is a problem. I appreciate your help
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