Code Quiz: Disconnecting Means for Low-Voltage Suspended Ceiling Power Distribution Systems

Nov. 8, 2018

Check your knowledge of low-voltage distribution systems in suspended ceilings

A disconnecting means for the Class 2 supply to the power grid system for low-voltage suspended ceiling power distribution systems shall be located as to be __________ and ___________ of the Class 2 power source for servicing or maintenance of the grid system.

A) readily accessible / lockable
B) accessible / within sight
C) convenient / part
D) none of the above

See the answer below.

Answer: B

Article 393 of the 2017 NEC covers the installation of low-voltage suspended ceiling power distribution systems. As specifically noted in Sec. 393.21(A), “A disconnecting means for the Class 2 supply to the power grid system for low-voltage suspended ceiling power distribution systems shall be located as to be accessible and within sight of the Class 2 power source for servicing or maintenance of the grid system.”

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].