What are the steps to determine the electrical line fault?

1. Observation: First of all, observe whether the equipment is in normal working condition. If the device does not respond or does not start, there may be an electrical wiring failure.

2. Check the power supply: Check whether the power supply is normal. You can check whether the outlet is energized, or use a voltmeter or power supply tester to measure the voltage stability of the power supply.

3. Check the wires: Check whether the wires and plugs of the equipment are intact and not damaged, aged or disconnected. Pay attention to check whether the wiring is firm, no loose or poor contact.

4. The use of multi-purpose testing instruments: the use of multi-purpose testing instruments, such as voltmeters, resistance meters, etc., can measure the voltage, current, resistance and other values of electrical components and lines to determine whether there is a line fault.

5. Check the protection device: Check whether the protection device works properly. For example, a circuit breaker or fuse is checked for tripping to determine if there is an overload or short circuit problem.

6. Check the grounding fault: Check whether the device is properly grounded. Observe whether there is leakage or use a ground resistance tester to measure the ground resistance.

7. Segment test: If it is judged that there may be a problem with a certain section of the line, it can be segmented test. For example, the connection between the device and the power supply is separated and tested one by one to find the specific fault.

Please note that for the sake of safety, it is recommended to seek professional help for the judgment and handling of electrical line faults.