When receptacles or switches have No. 6-32 screws secured to them with small pieces of cardboard, these pieces of cardboard must be ____ when the wiring device is installed in a metal outlet box.
A) left in place
B) removed
C) replaced with metal lock washers
D) none of these

Question

Quizplus · Accepted Answer

The pieces of cardboard used to secure the No. 6-32 screws are temporary and only meant to hold the screws in place during shipping and handling. They should be removed before the wiring device is installed in a metal outlet box as they can create an unsafe condition by insulating the device from the grounding path provided by the metal box.

When Receptacles or Switches Have No