200% Neutral vs. Isolated Ground

[jsun9]

So practically, in which cases, the 200% neutral or isolated ground or combined would take into consideration?

 

[infinity]

200% neutrals are typically used for high harmonic circuits where the current can become additive in the neutral. IG's are pretty much obsolete and IMO a waste of money.

 

[ptonsparky]

They serve different purposes.

I guess I don’t understand the question.