Why Do They Do this?

[infinity]

1

 

[mopowr steve]

Is it because there is no EGC ran inside the conduit?

 

[infinity]

1

 

[texie]

Yep, you see this way to often. Of course the correct fitting with a ground lug is available. While we're at it, that cobbled together transition fitting is not compliant either.

 

[electrofelon]

I have actually never seen that before. Probably a way to "solve" the "problem" of greenfield not being an acceptable EGC?

 

[infinity]

1

 

[Tony S]

In all the pictures what we this side of the pond would call a CPC looks as much use as a piece of wet string. OK our regulations are different to your codes but the safety aspects are the same.

CPC = Circuit Protective Condutor.

 

[paulengr]

1. Did it in a situation where the conductors were already run on 6” conduit and someone forgot grounding rings on a nonconductive box. External ground was cheaper.

2. In mining the fittings often corrode especially liquidtight to motors. Ground testing from load to rod is required annually. It often fails within 10 years or so. So either redo the whole thing or add an external bonding jumper.

3. Trays that are part of bonding require jumpers.

 

[petersonra]

IMO it is code compliant because it is not actually required.

 

[infinity]

IMO it is code compliant because it is not actually required.

I agree but I'm just wondering if anyone has heard of this electrical myth that makes it "required".

 

[Buck Parrish]

The falls under the old saying. When in doubt , ground it...

 

[texie]

My comments in post #4 were in the context of when an external jumper is required. But I missed the fact that infinity was trying to get across was the fact that the jumper was not required in the first place and I would agree.