using methods and precautions

a, the test leakage protection plug into the corresponding outlet, installed in the supply line specification, leakage protection under normal circumstances, power lines in the leakage test plug indicator light flashes off quickly after a moment.

two, plug leakage test light stays lit, indicating that the supply line is no leakage protection, or protection action current setting is too large, or earth ground resistance is too large.

Third, the test plug light is not on, indicating that the socket does not press the "left zero, right fire, on the ground," the provisions of the wiring, or the ground open. If the action leakage protection plug leakage test indicator appears micro-light, indicating that the presence of the power supply system leakage faults and earth ground resistance is too large, the lines have a greater voltage.

four, not a long time to drain test plug into a power outlet.

five, non-single-phase leakage test plug into the three-phase power circuit.