Electrician Red Seal · Question
A residential electrician is performing continuity checks on newly installed #14 AWG (2.08 mm²) branch circuit wiring. After successfully checking all receptacle and lighting circuits, the electrician encounters a circuit where the multimeter shows an 'OL' (open loop) reading when checking continuity between one end of a conductor and its other end. What is the most probable issue?
An 'OL' (open loop) reading on a multimeter when checking continuity means there is infinite resistance, indicating a break in the circuit. This is most likely
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Question: A residential electrician is performing continuity checks on newly installed #14 AWG (2.08 mm²) branch circuit wiring. After successfully checking all receptacle and lighting circuits, the electrician encounters a circuit where the multimeter shows an 'OL' (open loop) reading when checking continuity between one end of a conductor and its other end. What is the most probable issue?
Answer options:
- The circuit is correctly installed, and the 'OL' reading indicates proper insulation.
- There is a short circuit within the conductor. ✅ The conductor is broken or not properly terminated at one or both ends.
- The multimeter is set to measure AC voltage instead of resistance.
Correct answer: The conductor is broken or not properly terminated at one or both ends.
Explanation: An 'OL' (open loop) reading on a multimeter when checking continuity means there is infinite resistance, indicating a break in the circuit. This is most likely caused by a broken conductor or improper termination, preventing a complete path for current. Short circuits would show very low resistance, and proper installation would show continuity.
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