mc cables

[adanyelsa]

Hi I want to know how many mc cables can I pass through a wooden stud hole and where can I find that answer in the code book

 

[david]

Re: mc cables

B) Specific Uses. Type MC cable shall be installed in compliance with Articles 300, 490, 725, and 770.52 as applicable and in accordance with 330.10(B)(1) through (B)(4).

Bundled. Cables or conductors that are physically tied, wrapped, taped, or otherwise periodically bound together.

310.15 Ampacities for Conductors Rated 0?2000 Volts.
B) (2) Adjustment Factors.
(a) More Than Three Current-Carrying Conductors in a Raceway or Cable. Where the number of current-carrying conductors in a raceway or cable exceeds three, or where single conductors or multiconductor cables are stacked or bundled longer than 600 mm (24 in.) without maintaining spacing and are not installed in raceways, the allowable ampacity of each conductor shall be reduced as shown in Table 310.15(B)(2)(a).

 

[tonyi]

Re: mc cables

Originally posted by adanyelsa:
Hi I want to know how many mc cables can I pass through a wooden stud hole and where can I find that answer in the code book

As many as will fit. As David mentioned, you may run into bundling/derating as a result. With MC, you're also into using nail protector plates if the hole is within 1.25" of the edge.

There are standards on how large, and where, a hole can safely be drilled through structural members without weakening them significantly. Punching a 3" hole through a 2x4 is NOT a good idea

 

[adanyelsa]

Re: mc cables

Originally posted by david:
B) Specific Uses. Type MC cable shall be installed in compliance with Articles 300, 490, 725, and 770.52 as applicable and in accordance with 330.10(B)(1) through (B)(4).

Bundled. Cables or conductors that are physically tied, wrapped, taped, or otherwise periodically bound together.

310.15 Ampacities for Conductors Rated 0?2000 Volts.
B) (2) Adjustment Factors.
(a) More Than Three Current-Carrying Conductors in a Raceway or Cable. Where the number of current-carrying conductors in a raceway or cable exceeds three, or where single conductors or multiconductor cables are stacked or bundled longer than 600 mm (24 in.) without maintaining spacing and are not installed in raceways, the allowable ampacity of each conductor shall be reduced as shown in Table 310.15(B)(2)(a).

 

[adanyelsa]

Re: mc cables

Originally posted by david:
B) Specific Uses. Type MC cable shall be installed in compliance with Articles 300, 490, 725, and 770.52 as applicable and in accordance with 330.10(B)(1) through (B)(4).

Bundled. Cables or conductors that are physically tied, wrapped, taped, or otherwise periodically bound together.

310.15 Ampacities for Conductors Rated 0?2000 Volts.
B) (2) Adjustment Factors.
(a) More Than Three Current-Carrying Conductors in a Raceway or Cable. Where the number of current-carrying conductors in a raceway or cable exceeds three, or where single conductors or multiconductor cables are stacked or bundled longer than 600 mm (24 in.) without maintaining spacing and are not installed in raceways, the allowable ampacity of each conductor shall be reduced as shown in Table 310.15(B)(2)(a).

well thank you David I found what you told me thanks again and also thanks to tonyi for replying to my question

 

[don_resqcapt19]

Re: mc cables

You also need to look at Exception #5 to 310.15(B)(2)(a).
Don