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#101022 01/31/07 04:37 PM
Joined: Mar 2003
Posts: 92
G
gserve Offline OP
Member
Hi, I am doing a garage that is being wired in MC cable. It is going to have vinyl siding installed. The owner would like to use those plastic light blocks. My question is can these be used with MC cable if a standard MC connector is installed in the KO instead of those button NM connnectors that come with the block.Or does this come under it having to be listed for this use?

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#101023 01/31/07 04:44 PM
Joined: Jan 2004
Posts: 1,507
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Can you post a graphic of what a "Light Block" is? I've not been enlightened (pun not intended) as to what these are.


George Little
#101024 01/31/07 04:56 PM
Joined: Jul 2006
Posts: 23
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http://www.aifittings.com/k_6.htm

Looks like this one has 1/2" k.o.'s in the back. Dunno if you could manage the bending radius in a 2x4 wall.

#101025 01/31/07 05:26 PM
Joined: Mar 2003
Posts: 92
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gserve Offline OP
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Wow, I never gave the bending radius a thought. The garage has a 2x6 wall. The blocks I am talking about are similar to the ones in the above link but can be used to mount receptacles. This is what I want to do(GFCI of course). Maybe an angle connector could be used.

#101026 01/31/07 06:31 PM
Joined: Jan 2004
Posts: 1,507
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I don't think I'd have a problem as long as the sheath of the MC cable is not the grounding conductor. As for using an angle connector, I'm okay with that also since I don't see any prohibition on angle connectors inside walls for MC cable.


George Little
#101027 01/31/07 06:58 PM
Joined: Apr 2002
Posts: 558
C
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314.3 Nonmetallic Boxes
Nonmetallic boxes shall be permitted only with open wiring on insulators, concealed knob-and-tube wiring, cabled wiring methods with entirely nonmetallic sheaths, flexible cords, and nonmetallic raceways.
Exception No. 1: Where internal bonding means are provided between all entries, nonmetallic boxes shall be permitted to be used with metal raceways or metal-armored cables.
Exception No. 2: Where integral bonding means with a provision for attaching an equipment bonding jumper inside the box are provided between all threaded entries in nonmetallic boxes listed for the purpose, nonmetallic boxes shall be permitted to be used with metal raceways or metal-armored cables.


Curt Swartz
#101028 01/31/07 09:37 PM
Joined: Jul 2004
Posts: 9,672
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I am assuming the MC is bonded at the line end of the cable in a metal box. Is this saying it also needs to be bonded at the load end, even with a green wire ground inside?
I agree with George the new bond strip MC without an ECG inside is troubling.
Does this stuff come listed using a bonding bushing/wedge?


Greg Fretwell
#101029 02/09/07 12:35 PM
Joined: Apr 2002
Posts: 178
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Member
One thing I`ve noticed is the big box stores have a similar mount but it doesn`t have the cu inch or place for the wiring and lots of electricians are putting the wires just under the canopy of the fixture and are using no box so to speak. Now the ones pictured above are the ones we use and are ok.Anyone else see this.I`ve notice only from installing new lights behind others.


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