Fill in the blanks with the appropriate answer.

When installing a transformer (such as a 75kVA unit), the disconnecting means for this piece of equipment shall be _________, and the location of the disconnecting means shall be ______ marked on the transformer.


A. approved / properly

B. lockable / field

C. suitable / suitability

D. lockable / factory


Answer: B

As noted in 450.14 of the 2011 NEC, "Transformers, other than Class 2 or Class 3 transformers, shall have a disconnecting means located within sight of the transformer or in a remote location. Where located in a remote location, the disconnecting means shall be lockable, and the location shall be field marked on the transformers."
