feed from exhaust fan etc.

[Alwayslearningelec]

When running a feed for say a 20, 30 or 40a motor such as an exhaust fan etc. is a separate ground required or can you use the conduit as a ground. I am thinking it would not just be hot or hots(depending on poles/phases) and neutral? THanks.

What are the parameters for wiring motors and a separate gorund? Thanks.

 

[Cow]

Do you have a code book?

Art. 250 covers the different types of grounding conductors allowed.

 

[Dennis Alwon]

When running a feed for say a 20, 30 or 40a motor such as an exhaust fan etc. is a separate ground required or can you use the conduit as a ground. I am thinking it would not just be hot or hots(depending on poles/phases) and neutral? THanks.

What are the parameters for wiring motors and a separate gorund? Thanks.

You can use metal raceway as an EGC but depending on the flexible connection from the disconnect to the motor you may need an internal EGC.

Look at art. 250.118

 

[Alwayslearningelec]

Thanks guys.