NEIEP Mechanics Practice Exam

How should AC incandescent lamp sockets be wired?

1. Hot lead to the shell, grounded conductor to center terminal

2. Hot lead to center terminal, grounded conductor to the shell

3. Both leads connected to the shell

4. Grounded conductor connected to both terminals

The correct answer is: Hot lead to center terminal, grounded conductor to the shell

Wiring AC incandescent lamp sockets correctly is important for ensuring safety and proper functionality. The correct method involves connecting the hot lead to the center terminal and the grounded conductor to the shell. This arrangement is essential because the shell of the socket is typically designed to be grounded. By connecting the grounded conductor to the shell, any fault current that might occur will have a proper path to ground, which helps to prevent electric shock. Meanwhile, connecting the hot lead to the center terminal allows the lamp to receive power and function as intended. Using this configuration ensures that if there is a malfunction in the lamp, the risk of electrical hazards is minimized. Proper grounding also helps protect the light fixture and its users from potential electrical surges or shorts. The other methods would not ensure both safety and functionality, leading to ongoing risks of shock or equipment failure.