Back to tapping 14 0n a 20amp circuit.

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russ

russ

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Burbank IL
Someone asked me about supplemental fusing on a fluorescent fixture, with whips containing wiring smaller than number 12.
I'm just checking to see if I'm right in answering that 402.5 and 240.4 allows smaller fixture wire to be connected to the circuit. I don't think whips are fixture wire, and would require supplemental fusing if undersized compared to the supply circuit.
Do you think that would also work (supplemental fusing) when use 14 to supply the fan and or lights in a bath room when using the 20 amp circuit.
 
Fusing it for 15 amps would certainly make it legal, but what about the expense involved just to do that? Wouldn't it be easier to just run 12 and be done with it?

Also, make sure to begin with you are allowed to use the 20a bath circuit for the lights and fan. 210.11(C)(3) Exc.

Edit to add: After re-reading the OP, I wonder if we're talking resi or comm here. Resi baths generally don't use fixture whips.
 
480sparky said:
Fusing it for 15 amps would certainly make it legal, but what about the expense involved just to do that? Wouldn't it be easier to just run 12 and be done with it?

Also, make sure to begin with you are allowed to use the 20a bath circuit for the lights and fan. 210.11(C)(3) Exc.

Edit to add: After re-reading the OP, I wonder if we're talking resi or comm here. Resi baths generally don't use fixture whips.
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The whip question, came up on a commercial job. It just started me thinking of the bathroom tap threads.
It might be easier to install the fuse, if the 14 was already in when you found out it's not legal.
 
iwire said:
Yes, but I am not sure that I can not make one on my own using proper fixture wire.
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I can't see any difference either.

I really don't see it as a big deal as long as your not feeding thru the fixtures.
I still not sure where the branch circuit ends and the fixture wire starts when it come to fixture whips. Maybe I'll try to contact one of the listing labs. Guess I should look at the white book.
 
480sparky said:
Only problem is, how do you install a fuse in a bathroom light and comply with 240.24(E)?
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For a minute I was stumped ' but after rereading it (other than supplementary) it's not prohibited.
 
russ said:
I can't see any difference either.

I really don't see it as a big deal as long as your not feeding thru the fixtures.
I still not sure where the branch circuit ends and the fixture wire starts when it come to fixture whips. Maybe I'll try to contact one of the listing labs. Guess I should look at the white book.
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Would not the difference the conductors? The branch circuit would be a building wire as listed in T310.13, and the fixture wire be listed in T402.3?

russ said:
For a minute I was stumped ' but after rereading it (other than supplementary) it's not prohibited.
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Correct you are. I just did a knee-jerk reaction of "You can't put fuses and breakers in a bathroom!"
 
480sparky said:
Would not the difference the conductors? The branch circuit would be a building wire as listed in T310.13, and the fixture wire be listed in T402.3?


Yep, I just was going thru the white book, and I ran into the same info on fixture wire, on page 364 of the 2007 book.
So if it's not of these type they can't officially be "fixture wire" as classified by code, and the white book.
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