EMT as Equipment Grounding Conductor

[george t. everett]

I have a problem with the lock nuts that come with die-cast fittings.
There isn't much meat there & have a tendency to split if over tightened.
Especially the 1/2 & 3/4.

 

[chris kennedy]

I have a problem with the lock nuts that come with die-cast fittings.
There isn't much meat there & have a tendency to split if over tightened.
Especially the 1/2 & 3/4.

Try a smaller hammer.:smile:

This is a good point. Now that I'm relying on my raceway to be the sole EGC, how much torque on a lock nut is too much? How much is to little?

'Shall be made tight' is a relative phrase.

 

[LarryFine]

I have a problem with the lock nuts that come with die-cast fittings.
There isn't much meat there & have a tendency to split if over tightened.
Especially the 1/2 & 3/4.

So, use steel connectors.

 

[cosmos]

If you think that a seperate egc is useless, then why is it required in patient care areas NEC 517.13(B)?

 

[LarryFine]

If you think that a seperate egc is useless, then why is it required in patient care areas NEC 517.13(B)?

Redundancy, not compensation.

 

[roger]

Redundancy, not compensation.

Correct, and NFPA 99 commentary points out that the insulated conductor is the secondary EGC while the metallic raceway is the primary.

Roger

 

[peter d]

I always run 3 separate EGC's for every circuit because "what if..." as well as "just in case", and of course "so I can sleep better at night." Finally, "it's a much better job."







Did I miss any?

 

[roger]

Did I miss any?

Do you tape the "GREEN" wire nuts you use on your EGC's?

Roger

 

[peter d]

Do you tape the "GREEN" wire nuts you use on your EGC's?

Roger

Of course I do. With green tape no less. That way, no one will ever get confused. They will know instantly they are dealing with an EGC, even if they have no clue what an EGC is. :roll:

 

[Dennis Alwon]

even if they have no clue what an EGC is. :roll:

Is that one of those brain scans???

 

[chris kennedy]

Is that one of those brain scans???

You want to sign up? I'll buy.

 

[Dennis Alwon]

You want to sign up? I'll buy.

I am not sure on e of those machines can handle my brain. I know I can't

 

[wirenut1980]

Correct, and NFPA 99 commentary points out that the insulated conductor is the secondary EGC while the metallic raceway is the primary.

Roger

So primary is better than secondary, eh? :grin:

 

[roger]

So primary is better than secondary, eh? :grin:

Yep, it is.

Roger

 

[sparky59]

those diecast set-screw connectors don't stay tight. i always use steel compression fittings when i use emt as an egc.

 

[peter d]

those diecast set-screw connectors don't stay tight.

Ummmmm....what?

 

[cschmid]

OK I gotta do it since Chris wont..why would you not run a grnd wire to a motor..using the EMT maybe legal but I think it is poor design..

 

[iwire]

OK I gotta do it .

Why do you have to do it? :grin:

It is a fact that properly installed EMT will provide a lower impedance fault path then a properly installed copper EGC inside it.

 

[peter d]

It is a fact that properly installed EMT will provide a lower impedance fault path then a properly installed copper EGC inside it.

Stop confusing a good argument with facts. :roll:

 

[iwire]

Stop confusing a good argument with facts. :roll:

But what if the EMT pulls apart.................

































Oh wait, what if the wire nut falls off the wire EGC? :-?