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NEMA SG-6 withdrawn?

NEMA SG-6 withdrawn?

NEMA SG-6 withdrawn?

(OP)
It has come to my attention that NEMA SG-6 was withdrawn a while back. Does anyone know why?

Thanks in advance
 

RE: NEMA SG-6 withdrawn?

I don't know why it was not kept current.  I still use it as a reference and have incorporated some of it's recommendations in specifications.  Perhaps the committee felt that there were other standards groups where it would be more appropriate.  ASCE has a substation guide out which covers the structure portion of SG-6.  RUS has one as well.

RE: NEMA SG-6 withdrawn?

(OP)
I am told that IEEE has some kind of standard regarding that as well. I can't remember the standard number off hand.

RE: NEMA SG-6 withdrawn?

I have found it necessary to inform breaker manufacturers that they were not meeting their own standard, regarding Table 36-2 column 10. Maybe they opted to drop the standard instead of of modifying their design.

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