Electrician's Licensing Practice Exam

What is the proper method to test conduit for grounding?

1. Using an ammeter

2. Testing for resistance with a multimeter

3. Using a 120V receptacle to check for voltage

4. Visual inspection only

The correct answer is: Using a 120V receptacle to check for voltage

The proper method to test conduit for grounding involves checking for voltage, which can be done by using a 120V receptacle to verify that a potential difference exists. This approach ensures that the conduit is properly bonded to the electrical system by confirming that it can carry fault current back to the ground. When testing for proper grounding, it is essential to establish that the conduit functions as an effective path for electrical current, which corresponds to its grounding purpose. Utilizing a 120V receptacle helps determine whether the system is correctly grounded by measuring voltage presence. If voltage is detected on the conduit while connected to the receptacle, it indicates that the conduit is live and has a connection back to ground, which is critical in ensuring safety against electrical faults. The other methods, such as using an ammeter or testing for resistance with a multimeter, are not suitable for verifying the grounding of conduit in the same context. Additionally, visual inspection alone, while important for assessing physical integrity, does not provide conclusive evidence of electrical continuity or proper grounding functionality.