When installing metal-clad power switchgear (greater than 600V), the external hinged doors or covers must be ___________ .
A. provided with stops to hold them in the open position
B. provided with a full-length hinge
C. lockable.
D. provided with a viewing window
Answer: A
To be compliant with Section 490.38 of the 2011 NEC, when installing metal-clad power switchgear (greater than 600V) the external hinged doors or covers must be provided with stops to hold them in the open position.
Owen is the owner and president of National Code Seminars and the holder of master electrician certifications in 46 states. He can be reached at [email protected].