So im installing a small single phase !5kva Liebert UPS tomorrow. Im trying to be clear on bonding my raceway which feeds my disconnect. Is a UPS which feeds a !00 amp single phase panel a separately derived system? This UPS does not have a built in transformer. Thanks for any help!
Maybe 250.30(A)(6) Exception No. 2 is what you're looking for:
I'm thinking you do need to run a separate grounding electrode as your 5KVA exceeds the 1KVA limit.A grounding electrode conductor shall not be required for a system that supplies Class 1, Class 2, or Class 3 circuit and is derived from a transformer rated not more than 1000 volt-amperes, provided the system grounded conductor is bonded to the transformer frame or enclosure by a jumper sized in accordance with 250.30(A)(1)