The five primary methods of terminating a wiring device are: back wire, ? , speed wire, pre-terminated leads (leaded), and modular

• A. Top wire
• B. Bottom wire
• C. Side wire
• D. Front wire

Answer: (C)

The idea this question tests is the different ways conductors can be connected to a wiring device. Each method describes where the conductor enters and how it’s secured: back wire means you insert the wire from the rear; side wire means the conductor goes in from the side; speed wire is a quick, typically tool-free termination; pre-terminated leads are wires already attached to the device; modular refers to using components that snap into a modular system.

Filling the blank with side wire completes the set of recognized termination methods, since side entry is a standard, distinct way to terminate conductors alongside back wiring, speed wire, pre-terminated leads, and modular systems. Top, bottom, or front entry aren’t standard terms used to describe these termination methods, so they don’t fit as the missing method.