"class C grounding" or " special class 3 grounding"

[sparky7746]

Anyone ever heard of these terms? I am connecting a new industrial printer and these terms appear in the installation manual. The machine is 240 volt 30 amp single phase.

thanks

 

[petersonra]

Sounds like something from a MilSpec. I don't recall off hand what each one is called but one class of grounding (really bonding) is via plug and cord, another via a grounding conductor of the wire type, a third via a ground strap. There might be more.

 

[sparky7746]

The factory set up guy doesn't know what it means either. We are going to go with a full size ground wire back to the source and call it good.

thanks

 

[infinity]

Since it a 30 amp circuit the EGC would be the same size as the ungrounded conductors, is it possible that they want an oversized EGC?