Montana Electrical Training Center
 

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4th Year
Jan 22, 2013

Code Question Found in 2008 NEC Book

 

 

1.       The secondary circuits of current and potential instrument transformers must be grounded where the primary windings are connected to circuits of ____ or more to ground and, where on switchboards, must be grounded irrespective of voltage.

a)       300V

b)       600V

c)       1,000V

d)       150V

Code Reference?

 

Email answers to cmcgowan@mt.net


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Montana Electrical Training Center
2616 Bozeman Avenue
Helena, MT 59601
  (406) 449-7173

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