Electical Code Test

[Joe Funderburk, CMI]

I know...I know..."we are not code inspectors".

This is for anyone who wants to play along. Anyone see anything wrong?

[Bob Elliott]

I used to leave my gum under the desk.

[Michael Larson]

That's a very nice staple you got there.

[Robert Meier]

If it's 1.25" from the edge of the stud then it looks fine to me.

[Michael Larson]

Originally Posted by Robert Meier

If it's 1.25" from the edge of the stud then it looks fine to me.

Do you see the 2"-2-1/2" staple?

[Robert Meier]

Originally Posted by mlarson

Do you see the 2"-2-1/2" staple?

Yup, but what does that have to do with this being an electrical code test? The requirement is that the hole edge be 1.25" from the wood edge. Looks like it's in the center of the wood which makes it compliant, unless I'm missing something?

[Michael Larson]

Originally Posted by Robert Meier

Yup, but what does that have to do with this being an electrical code test? The requirement is that the hole edge be 1.25" from the wood edge. Looks like it's in the center of the wood which makes it compliant, unless I'm missing something?

I understand that but it was the only issue I saw.

[Bob Elliott]

Originally Posted by mlarson

I understand that but it was the only issue I saw.

Good catch that makes me wonder if that is what they secured the conductors to the studs with.
Defiantly would be wrong.

[Jeffrey R. Pope]

I don't see it Joe. What gives?

[Bruce A. King]

3 or more cables with 2 or more current carrying conductors must be derated if installed through the same hole without spacing present. The firestop caulk prevents the spacing. NEC 334.80

[David Garton]

Originally Posted by bking

3 or more cables with 2 or more current carrying conductors must be derated if installed through the same hole without spacing present. The firestop caulk prevents the spacing. NEC 334.80

Me too

[David P. OKeefe]

Originally Posted by bking

3 or more cables with 2 or more current carrying conductors must be derated if installed through the same hole without spacing present. The firestop caulk prevents the spacing. NEC 334.80

Even if it's through only one stud?

[David P. OKeefe]

One other thing. How do we know they are through the same hole? Each wire could have it's own hole but covered up.

[Bob Elliott]

Reason 12 :I hate that extension cord stuff.

[Joe Funderburk, CMI]

Originally Posted by bking

3 or more cables with 2 or more current carrying conductors must be derated if installed through the same hole without spacing present. The firestop caulk prevents the spacing. NEC 334.80

Bruce wins!

E3705.4.4 Conductors of Type NM cable. Conductors in NM
cable assemblies shall be rated at 90°C (194°F). Types NM,
NMC, and NMS cable identified by the markings NM-B,
NMC-B, and NMS-B meet this requirement. The ampacity of
Types NM, NMC, and NMS cable shall be at 60°C (140°F) conductors
and shall comply with Section E3705.1 and Table
E3705.5.3. The 90°C (194°F) rating shall be permitted to be
used for ampacity correction and adjustment purposes provided
that the final corrected or adjusted ampacity does not exceed that
for a 60°C (140°F) rated conductor. Where more than two NM
cables containing two or more current-carrying conductors are
installed, without maintaining spacing between the cables,
through the same opening in wood framing that is to be fire- or
draft-stopped using thermal insulation, caulk or sealing foam,
the allowable ampacity of each conductor shall be adjusted in
accordance with Table E3705.3. Where more than two NM
cables containing two or more current-carrying conductors are
installed in contact with thermal insulation without maintaining
spacing between cables, the allowable ampacity of each
conductor shall be adjusted in accordance with Table E3705.3.