emt connectors

[wireman1]

at what size wire must a plastic bushing be used on the straight connector entering the box,is it a number 4 or larger? site article thanks

 

[chris kennedy]

300.4(G).

 

[kwired]

Note that it only says 'raceways' in that section. Cable assemblies it is not required.

 

[jusme123]

Note that it only says 'raceways' in that section. Cable assemblies it is not required.

110.3b , as I'm sure the cable manufacture requires protection for their cable assemble

 

[Ponchik]

OP asked for EMT connector.

I don't think the plastic bushing is required for EMT connectors. At least it is not required in 358.46 as it is in other XXX.46 section.

 

[iwire]

110.3b , as I'm sure the cable manufacture requires protection for their cable assemble

Nope.

That is why we bring the sheath in past the connector.

 

[iwire]

OP asked for EMT connector.

I don't think the plastic bushing is required for EMT connectors. At least it is not required in 358.46 as it is in other XXX.46 section.

It is required for conductors 4 and larger by 300.4 as Chris pointed out.

 

[darekelec]

Although OP asked about emt connectors let's not forget about RMC entering a box.
344.46 Bushings. Where a conduit enters a box, fitting, orother enclosure, a bushing shall be provided to protect thewire from abrasion unless the design of the box, fitting, orenclosure is such as to afford equivalent protection.
FPN: See 300.4(G) for the protection of conductors sizes 4AWG and larger at bushings.

 

[infinity]

A good graphic from Mike:

 

[iwire]

A good graphic from Mike:

Not sure I agree with the graphic regarding PVC

352.46 Bushings. Where a conduit enters a box, fitting, or other enclosure, a bushing or adapter shall be provided to protect the wire from abrasion unless the box, fitting, or enclosure design provides equivalent protection.

I don't see a size limitation.

 

[kwired]

OP asked for EMT connector.

I don't think the plastic bushing is required for EMT connectors. At least it is not required in 358.46 as it is in other XXX.46 section.

It is required for conductors 4 and larger by 300.4 as Chris pointed out.

I agree with you and Chris. Also if the connector would have an insulated throat or otherwise has edges that will not cause damage to the conductor it is probably designed/listed to not require the added bushing.

 

[1793]

I agree with you and Chris. Also if the connector would have an insulated throat or otherwise has edges that will not cause damage to the conductor it is probably designed/listed to not require the added bushing.

That is my take.