New MC cable for vertical pulls

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William1978

William1978

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N.C.
Have any of you used the new MC cable from southwire? The sales rep. says you could pull it 60 stories strait up, and not need wedges or stop every few floors and 90 into a box and then 90 back of the box and go up a few more floors. The MC has some sort of white hard stuff between the wire and the jacket to keep the wire from falling out.
If any of you have used this new MC was as easy as the sales rep. made it sound? You would still have to strap it per 330.30.
 
William, it's the stuff I linked to right? I don't see where it says you don't need to secure it.
 
chris kennedy said:
William, it's the stuff I linked to right? I don't see where it says you don't need to secure it.
Click to expand...
Yes that is the stuff. You would still need to strap the MC cable, but what the sales rep. told me was that you would not need to support the wire like it says in 300.19.
 
William,
The listing or design of that cable cannot change the code rule.
(B) Fire-Rated Cables and Conductors. Support methods and spacing intervals for fire-rated cables and conductors shall comply with any restrictions provided in the listing of the electrical circuit protective system used and in no case shall exceed the values in Table 300.19(A).
Click to expand...
The rule is very specific...you use the more restrictive requirement...either the listing requirement or Table 300.19(A), which ever requires more supports.
 
don_resqcapt19 said:
William,
The listing or design of that cable cannot change the code rule.

(B) Fire-Rated Cables and Conductors. Support methods and spacing intervals for fire-rated cables and conductors shall comply with any restrictions provided in the listing of the electrical circuit protective system used and in no case shall exceed the values in Table 300.19(A).
Click to expand...
The rule is very specific...you use the more restrictive requirement...either the listing requirement or Table 300.19(A), which ever requires more supports.
Click to expand...
Don, I read that earlier and didn't understand why that art is limited to 'Fire-Rated Cables'. Makes sense that all cables in riser between floors are to be fire-rated. Is this correct?
 
Chris,
This part of the rule only applies to cables installed per 700.9(D)(1)(2) and other sections of the code that require a one hour rated electrical system. The wording in the proposal (3-85) was "electrical circuit protection system". The proposal was rejected, but was "accepted in principle" by the panel action on comment 3-67, but they used the words "fire rated cables and conductors".
 
William1978 said:
Yes that is the stuff. You would still need to strap the MC cable, but what the sales rep. told me was that you would not need to support the wire like it says in 300.19.
Click to expand...

If UL has evaluated it specifically for compliance with 300.19(B)(4), then you wouldn't have to.

I found nothing in the general info or southwire's guide info that states this. Now it may be that this product is so new that the info has not found it's way into the guide info.
 
Larry,
I assume you mean 300.19(C)(4), but even so, there is no provision to exceed the limits shown in Table 300.19(A) per the wording in 300.19(B):
"... in no case shall exceed the values in Table 300.19(A)."
 
don_resqcapt19 said:
Larry,
I assume you mean 300.19(C)(4), but even so, there is no provision to exceed the limits shown in Table 300.19(A) per the wording in 300.19(B):
"... in no case shall exceed the values in Table 300.19(A)."
Click to expand...

Theoretically speaking....

If the conductors were in such a way bonded or attached to the armour, then I could see it.

Probably a moot point since it's based on some glib salesman.

Actually I did mean 300.19(B)(4) because I'm dealing from the 2005.:D
 
don_resqcapt19 said:
The rule is very specific...you use the more restrictive requirement...either the listing requirement or Table 300.19(A), which ever requires more supports.
Click to expand...

Very true for the end game. . Something to consider when you're getting everything in order before your inspection.

But it's nice to know the cable limits during the installation process. . If you don't have to baby it during installation, that is a big advantage during install.

Plus can you imagine damaging a long 500kcmil riser during installation ? . That could bankrupt you !
 
William,
That does not appear to be a "fire rated" cable assembly, so the rule that I was quoting from does not apply. That rule, 300.19(B), only applies to fire rated cables, and I don't see anything in 300.19(A) that even applies to cable assemblies.
 
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