rjh66

[rjh66]

I want to run 4/3 romex for a short portion if its Total run on the surface in a garage. It needs to be protected for the 4 feet that will be on the surface of the sheetrock. I am thinking, 1 1/4" steel flex with jakes and insulated nylon bushing at each end.

I am wondering should I bond the flex as it might be considered part of the electrical assembly? I don't think my AHJ will buy PVC as an alternative.

 

[infinity]

Take a look at 334.15.

Welcome to the Forum.

 

[electricmanscott]

Sleeve it in pvc.

 

[rwreuter]

Sleeve it in pvc.

ditto, it is much easier

 

[raider1]

Steel flex is not typically approved for use to protect NM cable from physical damage.

I agree with using Schedule 80 PVC conduit.

Chris

 

[Jim W in Tampa]

PVC is the smart way. Just why would your ahj reject it ??
And welcome to the forum

 

[Pierre C Belarge]

I am not sure where the NM cable is being installed, other than on the surface for a short distance. Who says the location on the surface is subject to physical damage? How much damage? I guess that sheetrock must be some mighty powerful sheetrock, since it can stand up to the abuse of physical damage...

Just because NM cable, or any other cable is installed on the surface, does not in itself mean it is subject to physical damage...although it is a subjective call by the inspector.

 

[nolabama]

I am not sure where the NM cable is being installed, other than on the surface for a short distance. Who says the location on the surface is subject to physical damage? How much damage? I guess that sheetrock must be some mighty powerful sheetrock, since it can stand up to the abuse of physical damage...

Just because NM cable, or any other cable is installed on the surface, does not in itself mean it is subject to physical damage...although it is a subjective call by the inspector.

I have been told that above 8 feet is not subject to damage. That is a subjective answer although.

 

[Dennis Alwon]

Art. 334.15(B) allows schedule 80 PVC, emt,imc, rmc to protect nm cable from physical damage.

 

[electricmanscott]

I am not sure where the NM cable is being installed, other than on the surface for a short distance. Who says the location on the surface is subject to physical damage? How much damage? I guess that sheetrock must be some mighty powerful sheetrock, since it can stand up to the abuse of physical damage...

Just because NM cable, or any other cable is installed on the surface, does not in itself mean it is subject to physical damage...although it is a subjective call by the inspector.

I agree with that 100%. I think many guys just hear exposed romex and think danger.

I never use sched 80 as a sleeve from something like this although I guess you would have to to be legal. By that same thinking you would have to use sched 80 for almost all pvc installations as sched 40 can't be used where subject to physical damage.

 

[augie47]

I agree with that 100%. I think many guys just hear exposed romex and think danger.

I never use sched 80 as a sleeve from something like this although I guess you would have to to be legal. By that same thinking you would have to use sched 80 for almost all pvc installations as sched 40 can't be used where subject to physical damage.

do you think flex offers more protection than Sch 80 ?

 

[Dennis Alwon]

do you think flex offers more protection than Sch 80 ?

I do or at least as much if it is metal flex.