Transfer switch

[jcrider]

Are disconnecting means or fuse protection required ahead of generator transfer switches ? Code reference ?

 

[LarryFine]

Are disconnecting means or fuse protection required ahead of generator transfer switches ? Code reference ?

Yes, unless the T/S itself is rated as service equipment. Simply put, the main disco must be the first thing hit after the meter.

It need not be fused if the service-rated T/S either is OCP'd or the OCPD is immediately adjacent to the service-rated T/S.

The code reference is the same as any service requires. The presence of a T/S doesn't change that; you need a service disco.