1. A circuit breaker with a straight voltage marking e.g. 480V or 600V, maybe applied in a circuit where the nominal voltage between any two conductors does not exceed the circuit breakers ratings. 2. A circuit breaker with a slash rating e.g. 480Y/277V or 600Y/347V, may be applied in a circuit where the nominal voltage to ground from any conductor does not exceed the lower of the two values of the circuit breaker voltage rating, and the nominal voltage between any two conductors does not exceed the higher value of the circuit breaker’s voltage rating. • Q: I cannot mount the ABB Flange Handle on my Hoffman enclosure. Hoffman enclosures with a universal cut out requires an adapter plate provided by Hoffman. As with all enclosure manufactures the customer should consult the enclosure manufacturer’s catalog. • Q: I Need A Kirk Key what does ABB Offer We do not sell a kirk key….we only sell the provisions for the kirk key on the E-Max breakers We do Sell a Kirk Key lock adaptor plate if