jucesanc
Member
- Location
- California, Bay Area
I'm spec'ing out a UPS. It's in a nonclassified area, 480V and 50KVA. I can choose either a high resistance ground or a solid ground... What factors should I consider in making this decision?
A high resistance ground is used where you want continuity of power with an alarm on a line to ground
Solid ground system will open the OCPD on a line to ground or line to line.
Its really a design decision, but with a HRG you need a ground detector and you probably knew that.
I'm spec'ing out a UPS. It's in a nonclassified area, 480V and 50KVA. I can choose either a high resistance ground or a solid ground... What factors should I consider in making this decision?
I'm spec'ing out a UPS. It's in a nonclassified area, 480V and 50KVA. I can choose either a high resistance ground or a solid ground... What factors should I consider in making this decision?
If you are using the UPS to supply standard receptacles, then I'm wondering if the NEC allows a HRG, or if it has to be a regular grounded system, like most normal receptacles would usually have.
Personally, I have never seen a HRG UPS.
By ground detector, do you mean a GFCT?