Which of the following is not a primary method of terminating a wiring device?

• A. Back wire
• B. Side wire
• C. Twist wire
• D. Speed wire

Answer: (C)

Terminating a wiring device means attaching a conductor to the device’s terminal so it can carry current through that device. The common ways devices are designed to terminate conductors are back-wire, side-wire, or a quick-connect such as a speed-wire push-in. Twisting wires, by contrast, is a splicing technique used to join two conductors together, typically with a wirenut or connector, not to terminate a conductor to a device. Using only a twist would create an unreliable, non-listed connection to the device. So twisting wires is not a primary method of terminating a wiring device.