Disconnecting Means Requirements for X-Ray Equipment

A disconnecting means for X-ray equipment shall have adequate capacity for at least ____% of the input required for the momentary rating of the equipment or ____% of the input required for the long-time rating of the equipment, whichever is greater.

a) 50 / 100
b) 50 / 125
c) 100 / 100
d) 125 / 125

See answer and applicable Code reference

The correct answer is: a) 50 / 100

Article 660 covers all X-ray equipment operating at any frequency or voltage for industrial or other non-medical or non-dental use. As noted in the first sentence of Sec. 660.5, "A disconnecting means of adequate capacity for at least 50% of the input required for the momentary rating, or 100% of the input required for the long-time rating."

 

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