Local Disconnect Switch for 13.8kV -208Y/120V transformer required?
Local Disconnect Switch for 13.8kV -208Y/120V transformer required?
(OP)
I'm working on a project where we need to install a 13.8kV-208Y/120V Transformer to feed non-rotating distribution loads. The Transformer is being fed from a remote source (located about 300 ft away) which has a breaker.
Do I need to provide a local disconnect switch on the primary side of the transformer? Does anyone know for what application that needs local disconnect switch in accordance with NEC?
Thanks
Do I need to provide a local disconnect switch on the primary side of the transformer? Does anyone know for what application that needs local disconnect switch in accordance with NEC?
Thanks





RE: Local Disconnect Switch for 13.8kV -208Y/120V transformer required?
Interestingly, prior to this Code edition, transformers were not required to have a disconnect at all.
So if you can lock open the breaker, you should be OK. The location of the disconnect must be field marked at the transformer.