AC Systems Prohibited to be Grounded

[jar546]

AC voltage systems are required to be grounded. Although not common, there are times when this is not the case.

Name at least one AC voltage system that the NEC does not require a ground.

 

[ICE]

Circuits for electric cranes operating over combustible fibers in Class III locations, as provided in 503.155

 

[jar546]

Circuits for electric cranes operating over combustible fibers in Class III locations, as provided in 503.155

Well, there is one of them. There are several more.

 

[ICE]

Circuits for equipment with in electrolytic cell line working zones as provided in Article 668.