The primary 600V is fused at 90A; there is a load (per phase) of 60A or 173A on the 120/208 side (60x2.88 turns ratio xfmr).
There's actually 2 of these loads BUT only one is on at a time, 173A on then off and the other load/ room 173A on then off and so on.
Does a time clock count as an interlock?
By code I'm sure/ believe that this is allowed as long as it is physically impossible for both loads to be on at once. NEC and CEC feedback appreciated. Thanks.