Hello,

Another stumper of a question for me I could use some help with, even when I have the answer.

Here's the question:
"A "tap"transformer supply can use NM cable on the secondary side."
True or False

And the given answer:
"No 240.21(B)(3)(4)"

I just don't get this question at all.

Here's the code text from 240.21(B)(3)(4):
(4) The primary and secondary conductors are protected from physical damage by being enclosed in an approved raceway or by other approved means.

This would lead one to look at Article 334, NM cables, Yes?
Well, I have and don't see any relation to the question. 334.15(B) talks about Physical Damage Protection.

Before I even had the answer to this question I was stumped. I researched the following code threads without luck:
-Feeder Taps
-Transformers - in Article 250
-NM Cable, Art.334
-Separately Derived Systems
- Index lookup - Transformer ->Tap (nope) & Secondary Ties (no info), Taps -> Separately Derived Systems (No luck) & 250.30(A)(6)
-Internet searching -> no leads!!

What am I missing or is this question flawed?

Thanks,
Phil

Where ever you go, there you are.