A lesson to the learnin'

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Re: A lesson to the learnin'

Originally posted by jimwalker:
Also of question is what we have when we do a changeover.
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300.15 Boxes, Conduit Bodies, or Fittings ? Where Required. (F) Fitting. A fitting identified for the use shall be permitted in lieu of a box or conduit body where conductors are not spliced or terminated within the fitting. The fitting shall be accessible after installation.
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In larger sizes I often use a EMT connector>conduit coupling>MC connector combination which some will argue is not a fitting identified for the use.

Luckily those people have not been inspectors in my area. :p

[ January 01, 2006, 12:18 PM: Message edited by: iwire ]
 
Re: A lesson to the learnin'

Originally posted by iwire:
So what do you run inside your panels? :p

Where do you find the difference for cables in a raceway and cables brought into an enclosure?
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You're freakin' me out, boss.

I install the cable as described in 314.17(C).

312.5(C), Exception states that a cable does not have to be secured to the cabinet it enters if:
(e) The cable sheath is continuous through the raceway and extends into the enclosure beyond the fitting not less than 6 mm ( 1 /4 in.).
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It just seems like kind of a given that the cable sheath is supposed to be continuous until it gets to the box...?
 
Re: A lesson to the learnin'

George,

You're thinking about this too much. Just face facts, look in the mirror, and say "I am a hack." You'll feel much better afterward.
 
Re: A lesson to the learnin'

In larger sizes I often use a EMT connector>conduit coupling>MC connector combination which some will argue is not a fitting identified for the use.
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We do this all of the time when changing over 2" and larger conduit to flex etc. To the best of my knowledge no one makes a changeover bigger than 1.5". At least that's what they tell me when I try to order them from the supply house.
 
Re: A lesson to the learnin'

Originally posted by georgestolz:
It's listed as a cable assembly; removing the sheathing is not in tune with the listing.

The conductors inside are not marked per 310.
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Every time we strip NM and other sheathed/clad cables to connect to devices, or even more, when we land cables in panels, we have several inches or feet of unmarked conductors used. Why don't we have to splice to marked conductors?


I definitely agree with the twisted-wires-are-easier-to-pull-around-elbows crowd. Wire rope (often called cable) uses spiraled and twisted strands for the same reasons: outer-radius strands are on the inside a half-twist away.
 
Re: A lesson to the learnin'

Originally posted by georgestolz:
I install the cable as described in 314.17(C).
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314.17(C) applies strictly to non-metallic boxes, I have not used a non-metallic box in years except in my own home. :)


Originally posted by georgestolz:
312.5(C), Exception states that a cable does not have to be secured to the cabinet it enters if:

(e) The cable sheath is continuous through the raceway and extends into the enclosure beyond the fitting not less than 6 mm ( 1 /4 in.).
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First 312.5(C) Exception only applies to NM.

Second 312.5(C) Exception has to be taken altogether not piecemeal. What 312.5(C) Exception allows if all the conditions are met is to use a raceway as a sleeve for multiple NMs with only a fitting to prevent abrasion at the point where the NMs enter the raceway. The exception takes away the general rule of 312.5(C) that requires cables to be connected to the box, with the exception no cable connector is needed.

What I and many others do is move the cable attachment to the box to the end of a raceway that is attached to the box by the use of a fitting that physically connects the cable to the raceway so no amount of stain on the cable is transmitted to the conductors in the raceway and therefore the box as well.

Originally posted by georgestolz:
It just seems like kind of a given that the cable sheath is supposed to be continuous until it gets to the box...?
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Why...if it is in an approved raceway?
 
Re: A lesson to the learnin'

My wife took a basket weaving class. And you can take a stick beand a 90 it will break but if you twist it as you bend you get a nice 90. The stick fibers would be like the wires.
 
Re: A lesson to the learnin'

edited: Did not see the later posts.

Mark

[ January 02, 2006, 07:14 AM: Message edited by: busman ]
 
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