ECN Forum Forums General Topics of the Trade General Discussion Area Grounding short sections of raceway

When are short sections of raceway required to be grounded. For example, is a 5 ft. piece of metallic conduit required to be grounded when used as a "sleeve" to protect a cable?

I found NEC article 250.132. "Isolated sections of metal raceway where required to be grounded".......etc.

The wording is somewhat vague to me.

Frank