donaldsullivan
Member
A project has a one-line diagram showing the electrical components with conduit and wire sizes. The system is 277/480V, 3-phase, 4-wire. A letter is sent through the general contractor stating that a load has changed from 2hp to 15hp. The letter requests coordination of the motor starter to be changed to size 2 and the motor is changed to a 15hp. The electrical contractor made the change in the MCC. The conductors were never changed to #10cu THWN from #12cu THWN. As the engineer, I take some responsability for the wire not being upgraded. My question is what responsability does the electrical contractor have in terminating to equipment with undersized conductors.
Thanks for any comments.
Thanks for any comments.