Need help, like you didn't know!

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76nemo

76nemo

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Ogdensburg, NY
I had a friend in NC that had a garage addition and the EC used push on rubber bushings. They looked good and seemed to be better than plastic bushings off of threaded connecters. Can someone point me to particular codes to this application? I really like these rubber bushings. I'd like to know more. Anyone help?
 
That's thee exact company I mean. The EC only piped up about 9' in thinwall and capped it off with those, where the NM left and went to the second floor.

From your response, I guess you don't have anything good to say about them, eh?
 
76nemo said:
I had a friend in NC that had a garage addition and the EC used push on rubber bushings. They looked good and seemed to be better than plastic bushings off of threaded connecters. Can someone point me to particular codes to this application? I really like these rubber bushings. I'd like to know more. Anyone help?
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Can't help with a code answer. I used many 4" ones on my last project. The Arlingtons we used were not rubber, but some kind of durable plastic. Customer loved 'em!

Much faster, cheeper and better (compared to an insulated throat 4" EMT connector and his bushing friend).

480,

Why do you not lik'em?

Best Wishes Everyone
 
Pheewwww, that turned 180 degrees! My OP could of been worded a little clearer. Do they have any restrictions that plastic threaded bushings do not?
 
I use them all the time on top of sleeves for unfinished basement receptacles and switches. I'd be hard pressed to tell you something in the NEC that makes this particular use of that product legal, however. Stubs out of the tops of panels are specifically permitted, however, by the code.
 
76nemo said:
Do they have any restrictions that plastic threaded bushings do not?
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I am not sure they are listed for line voltage.

That said, what is the application. If they just sleeved NM for physical protection it seems like a careful installer.
 
My thoughts too. I had seen this just the one time where they exited the conduit with NM,(no JB), and capped the pipe off to protect the sleeving. Is that permissable, to exit the EMT like that? If so, then how far after it's exit, does it have to be secured?
 
76nemo said:
My thoughts too. I had seen this just the one time where they exited the conduit with NM,(no JB), and capped the pipe off to protect the sleeving. Is that permissable, to exit the EMT like that? If so, then how far after it's exit, does it have to be secured?
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The 2008 clearly states 12" in art. 334.15(C)
 
76nemo said:
My thoughts too. I had seen this just the one time where they exited the conduit with NM,(no JB), and capped the pipe off to protect the sleeving. Is that permissable, to exit the EMT like that? If so, then how far after it's exit, does it have to be secured?
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It does not seem to be permitted, since the cable is not secured within the required distance of the box, and there is no proper box connector for the cable. It is a common practice, however, and does not seem to even raise an eyebrow for any inspector I've crossed. I fully expect new code language soon that would specifically permit this install, with certain caveats.
 
Marc's prayers have been answered

Here is the art.

(C) In Unfinished Basements and Crawl Spaces. Where cable is run at angles with joists in unfinished basements and crawl spaces, it shall be permissible to secure cables not smaller than two 6 AWG or three 8 AWG conductors directly to the lower edges of the joists. Smaller cables shall be run either through bored holes in joists or on running boards. NM cable installed on the wall of an unfinished basement shall be permitted to be installed in a listed conduit or tubing or shall be protected in accordance with 300.4. Conduit or tubing shall be provided with a suitable insulating bushing or adapter at the point the cable enters the raceway. The NM cable sheath shall extend through the conduit or tubing and into the outlet or device box not less than 6 mm (? in.). The cable shall be secured within 300 mm (12 in.) of the point where the cable enters the conduit or tubing. Metal conduit, tubing, and metal outlet boxes shall be connected to an equipment grounding conductor.
 
Dennis Alwon said:
Marc's prayers have been answered

Here is the art.

(C) In Unfinished Basements and Crawl Spaces. Where cable is run at angles with joists in unfinished basements and crawl spaces, it shall be permissible to secure cables not smaller than two 6 AWG or three 8 AWG conductors directly to the lower edges of the joists. Smaller cables shall be run either through bored holes in joists or on running boards. NM cable installed on the wall of an unfinished basement shall be permitted to be installed in a listed conduit or tubing or shall be protected in accordance with 300.4. Conduit or tubing shall be provided with a suitable insulating bushing or adapter at the point the cable enters the raceway. The NM cable sheath shall extend through the conduit or tubing and into the outlet or device box not less than 6 mm (? in.). The cable shall be secured within 300 mm (12 in.) of the point where the cable enters the conduit or tubing. Metal conduit, tubing, and metal outlet boxes shall be connected to an equipment grounding conductor.
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Well, howdy stranger, been awhile since I've seen you here. Where's the cool avatar? Now I have the '05 in front of me., but I think I lost you. Try again. From a 48" mount switch in the garage, the NM leaves the box up through 1/2" EMT. The NM is not secured in the switch box, so are you saying as long as it exits the thinwall and is secured at no more than 4.5', it's okay?
 
76nemo said:
Try again. From a 48" mount switch in the garage, the NM leaves the box up through 1/2" EMT. The NM is not secured in the switch box, so are you saying as long as it exits the thinwall and is secured at no more than 4.5', it's okay?
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No. The cable shall be secured within 300 mm (12 in.) of the point where the cable enters the conduit or tubing.

Once the cable leaves the emt it must be secured within 12".
 
Dennis Alwon said:
No. The cable shall be secured within 300 mm (12 in.) of the point where the cable enters the conduit or tubing.

Once the cable leaves the emt it must be secured within 12".
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What if the NM left an 18" recep mount and ran 8' up the wall in the same manner? Can we pinpoint that scenario? If we secured it a foot out of the pipe, that's almost 10' of an unsecured vertical run.
 
76nemo said:
What if the NM left an 18" recep mount and ran 8' up the wall in the same manner? Can we pinpoint that scenario? If we secured it a foot out of the pipe, that's almost 10' of an unsecured vertical run.
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Nemo-- the code does not say how long the conduit can be. Other than article 300.19 & Table 300.19(A) you can go up as far as that section will allow. The nm does not need support within the raceway. Why would it. Conductors in the conduit don't need support so why would the nm. Once it leaves the conduit then you must support it within 12".
 
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