Nonmetallic switch box & MC...

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quogueelectric said:
Have you ever wired an em light that was all plastic in mc cable?
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Yes many, the MC cable terminated in a metal box with the MC EGC bonded to the box as required by 250.148. Then the plastic fixture is attached to that.
 
iwire said:
Yes many, the MC cable terminated in a metal box with the MC EGC bonded to the box as required by 250.148. Then the plastic fixture is attached to that.
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How many do you realistically think get installed like this? Really now hand on the bible. Spill the beans.
 
quogueelectric said:
How many do you realistically think get installed like this? Really now hand on the bible. Spill the beans.
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Many of them. My hand is on the bible--The Fresh-water Fisherman's Bible. Will that do?
 
quogueelectric said:
How many do you realistically think get installed like this? Really now hand on the bible. Spill the beans.
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What's so weird about that? Whenever we install smoke detectors or keyless lampholders, for example, the unconnected EGCs are simply folded up in the back of the box.

As long as the MC's sheath is bonded at the feed end, connecting additional metal to the load end won't wnhance its effectiveness.

Added: I've rewired with NM plenty of houses originally wired in BX (AC), and used a metal box wherever we connected to the BX, as an interface between the BX and the NM's EGC.
 
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I'm surprised at what would seem to be a tempest in a teapot-The one rule that might seem to imply a thing is implied as ok-must always be hooked up with all that is associated with it on the other end-a rule that references boxes ,cabinets,..etc and what wiring methods can be somehow correctly terminated in said box,also only work if all methods for that particular wiring/cable assembly's that are allowed according to its "LISTING" are followed and are also allowed in the method that you want to employ or are setting up a hypothetical question for.
To put it another way[only literary here not electrical but it suits the purpose]when it comes to code{evey thing seems to often reference additional sections] "IF THE THUNDER DON"T GET YOU,THEN THE LIGHTING WILL". i.e nothing is ever what it seems-thats why you're a qualified person asking questions.When someone stops asking questions is the the trouble starts.
 
kornbln said:
A122.jpg


Designed for use with ENT...
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Well looky there. I wasn;t familier with these and now that I've seen one I would not be opposed to attaching an MC cable to one. If it is a code violation to not have it bonded its silly.:smile:This is different than the original box shown.
 
iaov said:
Well looky there. I wasn;t familier with these and now that I've seen one I would not be opposed to attaching an MC cable to one. If it is a code violation to not have it bonded its silly.:smile:This is different than the original box shown.
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What if you feed in and out of the box with MC???? Then what-- still silly?
 
mdshunk said:
Then you need to use a duplex connector to keep the bonding in tact.
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Correct but if you don't then you need to bond across the two connectors.

Seems a lot easier to use a metal box...
 
Dennis Alwon said:
Correct but if you don't then you need to bond across the two connectors.
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What two connectors? A duplex connector is one connector, rated for bonding, since you can use that same connector for type AC cable.
 
mdshunk said:
What two connectors? A duplex connector is one connector, rated for bonding, since you can use that same connector for type AC cable.
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Marc I am saying if you don't use a duplex and use two indiviual connectors then you need to bond.
 
celtic said:
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Can MC or AC be run straight into one of these plastic style exit fixtures?
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Sure, just slap a bonding bushing on the MC connector.

But I'm just shooting from the hip. I don't know if the code requires both ends of a metal cable assembly to be bonded. :confused:
 
peter d said:
Sure, just slap a bonding bushing on the MC connector.
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I've had a hard time getting some bond bushings to grab on most MC connectors when they come through something plastic. Not enough thread left after going through the thick plastic. Locknuts work okay, but a bond bushing is a challenge. Takes the right connector and the right bond bushing combination, and I haven't quite worked out what that combination is.
 
I've always installed exit signs on a box, as I'm sure everyone else has.

But some of the combo exit/bug eyes, and buy eyes have a KO for conduit or cable entry. Obviously for surface mounting as the enclosure itself is the box. However, some such as Lithonia have to be mounted on a box as they have that two-part assembly for "contractor friendly installation". Right.
 
I have replaced a few emergency lights that had mc wired directly into the back. Never thought to look and see if it were legal or not. It would appear that if there were a 1/2 ko ( there was) then that would not be an issue.
 
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