Electrician Red Seal · Question
A two-wire control circuit utilizes a normally open (NO) pressure switch to start a motor. What additional component is NOT required in this circuit, unlike a three-wire control circuit?
A two-wire control circuit uses a maintained contact device (like a pressure switch or limit switch) that typically does not require a separate STOP button or a
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Question: A two-wire control circuit utilizes a normally open (NO) pressure switch to start a motor. What additional component is NOT required in this circuit, unlike a three-wire control circuit?
Answer options: ✅ A stop button.
- A main power contactor.
- An overload relay.
- A starter coil.
Correct answer: A stop button.
Explanation: A two-wire control circuit uses a maintained contact device (like a pressure switch or limit switch) that typically does not require a separate STOP button or a holding contact, as the control device itself directly makes or breaks the circuit to the starter coil.
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