To turn a switch jack to the on position on an A1 switchboard, what must you do?

• A. Push straight in
• B. Turn the switch 60 degrees Clockwise
• C. Turn the switch 30 degrees Counterclockwise
• D. Turn the switch 30 degrees Clockwise

Answer: (D)

In this switchboard, the on position for a switch jack is reached by a small rotation of the switch. The design places the contacts so that when you rotate the knob about 30 degrees clockwise from the neutral position, the wiper aligns with the contacts that complete the circuit to the jack. That precise angular move is what energizes the connection. Pushing straight in doesn’t rotate the mechanism and won’t engage the circuit. Turning 60 degrees clockwise would overshoot the intended contact and could misalign the connection, while turning counterclockwise moves away from the on contact. So, the correct action is a 30-degree clockwise turn to set the jack on.