Socket Tester RCD GFCI NCV Test Outlet Tester Voltage Tester EU US UK Plug Ground Zero Line 30mA Smart Socket Detector 30-250V
Description:
-The polarity detection of the three hole power socket wiring
-The protection function detection of the leakage switch
-It can quickly and accurately detect the wiring
-Widely used:fire protection/laboratory/factory/family
?Voltage measurement
1. The normal voltage range of zero fire line is plus or minus 10% of the local standard voltage. If it is too high or too low, it may be because the circuit load is too high or the power supply is too low/ too high.
2.The normal voltage of zero-earth wire is less than 2V, if too high maybe it is because there is current leakage, or the three phase-sequence is out of balance or there is signal interference in the circuit.
?RCD TEST
Please turn off all electrical appliances before using t
