Question on EGC's

[joeyww12000]

Do you guys pull seperate EGC's for different branch circuits with different voltages? EXAMPLE) 120/208 and 277/480v panels set below a trough with conduits going to trough. From the trough one conduit leaving with a circuit from both panels, one for receptacles 120v and one for lighting 277v. Do you guys pull 2 EGC's keeping them seperated from there respective panel or do you just pull one and tap before taking them to there respective panel?

 

[Dennis Alwon]

Only one egc is required . The conduit, if metallic, may also be the egc thus no conductor would even be required unless speced or special circumstances where an egc conductor is required.

 

[iwire]

Do you guys pull seperate EGC's for different branch circuits with different voltages?

1 ............................

 

[roger]

One, sized for the largest OCPD of the circuits.

Roger

 

[Pierre C Belarge]

This is a good question. 300.3(B) and 250.122(C) both are referenced for this question.

If this installation was installed in a metallic raceway, and no equipment ground conductors were pulled, it would still be compliant, so I am going to say that the EGC can be shared in this common raceway.