Cable tray to be used as an equipment grounding conductor

[David lee]

Hi, I'm glad to know this site.
I have an question.

What's EGC(Equipment Grounding conductor)?
Please explain EGC in detail and easily.

And what advantage Cable tray to be used as an equipment grounding conductor?
And what are examples of apllication that?

I'm can't write English a little, and so
I'm afraid that you can't understand my questions.

Thank you!
Good bye~

 

[CEU]

Look at article 100 in your 2005 code book under Grounding conductor equiptment. 2nd to save money

 

[tom baker]

A cable tray can be used as an equpment grounding conductor if its listed for the use.
And only up to a certain size per the overcurrent device ahead of it