RNC Bushings

Status
Not open for further replies.
P

Paul Bates

Member
NEC 352.46 instructs us to use a bushing or adaptor where RNC enters a box, fitting or enclosure to protect the wire against abrasion, with no mention of AWG size. The Fine Print Note directly underneath directs us to NEC 300.4(F) for the protection of conductors 4 AWG and larger at bushings. Is it the intent of NEC 352.4F to require bushings on all RNC regardless of AWG size, or is the fine print note limiting us to #4 AWG and larger?
 
Paul Bates said:
NEC 352.46 instructs us to use a bushing or adaptor where RNC enters a box, fitting or enclosure to protect the wire against abrasion, with no mention of AWG size. The Fine Print Note directly underneath directs us to NEC 300.4(F) for the protection of conductors 4 AWG and larger at bushings. Is it the intent of NEC 352.4F to require bushings on all RNC regardless of AWG size, or is the fine print note limiting us to #4 AWG and larger?
Click to expand...

I use bell ends on larger conduit stub ups. I looks good and keeps the wire from getting "skinned" during a pull. Code or not I consider it good workmanship.
 
Is it the intent of NEC 352.4F to require bushings on all RNC regardless of AWG size, or is the fine print note limiting us to #4 AWG and larger?
Click to expand...

I agree with Frank, I would say that 352.4(F) requires bushings on All RNC regardless of the AWG of the wire installed within.

Chris
 
Paul Bates said:
........ Is it the intent of NEC 352.4F to require bushings on all RNC regardless of AWG size, or is the fine print note limiting us to #4 AWG and larger?
Click to expand...

No. IMO, the intent is to protect the wire from abrasion. This can be accomplished with either a bushing or an adapter. The throat of an adapter is designed as a substantial fitting and provides a smoothly rounded insulating surface. :smile: as you know, 300.5(H) has helpful info with re to underground.
 
BryanMD said:
And when the bushings get installed after all the wire is pulled? ;)
Click to expand...

That would be a violation of 300.18. This section requires raceways to be installed complete between outlet, juntion or splice points before the installation of the conductors. For RNC to be a complete system you must comply with 352.46.

JMHO,

Chris
 
BryanMD said:
My opinion as well...
How long has it been since you worked in the field? ;)
Click to expand...

Last weekend I trimed a house.:)

I have an electrical contractors license, and still do electrical contracting on a limited basis. I don't do work in the area that I am an inspector in though.

It has been about 3 years since I made the trip over to the dark side and became an inspector.
jedijz7.gif


Chris
 
Take a couple 2' PVC into a 1/4 " thick 24x24x6 PVC J-Box. Put on the lock nut and it's a good day if you can catch a thread or two with a bushing.
 
chris kennedy said:
Take a couple 2' PVC into a 1/4 " thick 24x24x6 PVC J-Box. Put on the lock nut and it's a good day if you can catch a thread or two with a bushing.
Click to expand...

Box adaptors Rock, They change everything. You never need a locknut and bushing again.
 
jrannis said:
Box adaptors Rock, They change everything. You never need a locknut and bushing again.
Click to expand...
I do use them on 1 1/2" and larger. In the bottom of a can, fine. Don't care for them in the sides of cans as you have to be careful to get a real good seal.

No one has mentioned this but I find more often than not I have to cut 1/4 to 3/8 of an inch off these to get them to seat properly. PITA! Any tricks if you don't have a vice?
 
chris kennedy said:
I do use them on 1 1/2" and larger. In the bottom of a can, fine. Don't care for them in the sides of cans as you have to be careful to get a real good seal.

No one has mentioned this but I find more often than not I have to cut 1/4 to 3/8 of an inch off these to get them to seat properly. PITA! Any tricks if you don't have a vice?
Click to expand...

Hold it against the shoe of either a sawsall or jigsaw. cuts off just the right amount. BTW they make an O ring for the outside part that makes it WP
 
Status
Not open for further replies.
Top