There is no requirement to bond the conduit on the primary or the secondary of the transformer. Most electricians do it for some reason but there is nothing in the NEC that requires it. You don't need to use bonding bushings on the load side of the service disconnecting means except if there are concentric or eccentric KO's and greater than 150 volts to ground 250.97. If there is a broken ko you would need one too. That's it... Everyone seems to do it but it is not required.
Last edited by tsolanto; 02/01/15 08:53 PM.
