Nec 250.22(5)

[mikeybmdb32]

Does anyone know why NEC 250.22(5) specifically says not to ground the secondary circuit of a pool lighting system?

I know that the NEC allows circuits to be ungrounded if interrupting the operation of the circuit would be less harmful than an uplanned interruption of the circuit. This makes sense to me in the case of heavy industrial operations that cannot suddenly be stopped, but I can't understand why the same rules would apply to swimming pool lighting.

 

[mikeybmdb32]

hmmmm ... guess it doesn't make sense to anyone else either ....

 

[augie47]

From the ROPs, it appears it was added simply to bring 250.22 in line with the requiremetn that already appeard in 680.23
rop:

Recommendation: ​

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Add new text to read as follows:
(5) Secondary circuits of lighting systems as provided in 680.23(A)(2).​

Substantiation: ​

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Items specified in 250.22(1) through (4) are referenced to
sections in Chapters 5 and 6. Ungrounded secondary circuit requirements for
swimming pool lighting in Chapter 6 as well. If these referenced in 250.22
were included for usability,then this new reference helps usability also.​

Panel Meeting Action: Accept
Number Eligible to Vote: 15
Ballot Results: ​

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Affirmative: 15​

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