I am wiring a surgery clinic in an existing building with a 277/480 volt service. A breaker in the MDP feeds a 225KVA TX in the surgery suite. beyond tht is a 120/208 volt subdistribution panel which feeds among other things, A transfer switch and 3 branch panels of the emergency system. We also have an emergency generator.
How far back does selective cooridination need to go to be effective?
To the secondary TX?
To the transfer switch?
To the breaker in the MDP?
How far back does selective cooridination need to go to be effective?
To the secondary TX?
To the transfer switch?
To the breaker in the MDP?