When controlling a load from three locations, a ? is used in conjunction with two ?.

When controlling a load from three locations, a ? is used in conjunction with two ?.

• A. 3-Way Switch / 4-Way Switches
• B. 3-Way Switch / Single-Pole Switches
• C. 4-Way Switch / 3-Way Switches
• D. 4-Way Switch / Single-Pole Switches

Answer: (C)

The setup for controlling a load from three locations uses traveler wiring with two 3-way switches at the ends and a 4-way switch placed between them. The two 3-way switches provide the end-to-end control by selecting which traveler conductor is connected to the load or to the supply. The 4-way switch in the middle has four terminals and swaps or passes the two traveler wires depending on its position, creating the different paths that let the load turn on or off from any of the three locations. Without a middle 4-way, two locations can be controlled; with three locations, the 4-way in between two 3-way switches is the standard arrangement. Choosing a configuration with single-pole switches or two 4-way switches would not properly provide multi-point control.

The setup for controlling a load from three locations uses traveler wiring with two 3-way switches at the ends and a 4-way switch placed between them. The two 3-way switches provide the end-to-end control by selecting which traveler conductor is connected to the load or to the supply. The 4-way switch in the middle has four terminals and swaps or passes the two traveler wires depending on its position, creating the different paths that let the load turn on or off from any of the three locations. Without a middle 4-way, two locations can be controlled; with three locations, the 4-way in between two 3-way switches is the standard arrangement. Choosing a configuration with single-pole switches or two 4-way switches would not properly provide multi-point control.