1, most of them are installed in the electric water heater plug line or in the plug, its leakage protection current is less than 30 mA, action time is less than 0,1 seconds. Electric water heater installation through the full water, plug in the plug, you should press the test button above the leakage protector to see if it can be tripped, such as electric water heater indicator light is not lit, indicating that the leakage protector is normal, can rest assured that the safe use. After the test once a month can be, (test more will affect its service life).
2, if you feel uneasy, or the home of the total line is not installed leakage protection switch, install a very simple: if you install it on the bus, you need to buy a 40 or 60A rated current leakage protection switch, add it in the home of the total switch above or below can be, you can also directly replace it as a total switch,
3, if it is a separate For electric water heater installation, buy a 15 or 20A rated current leakage protection switch, install it in front of the electric water heater socket line, leakage protection switch above the terminals have wiring signs, the top of the l connected to the incoming line of the fire wire, the N connected to the incoming line of the zero line, leakage protection switch corresponds to the following is out of the line,
4, the three-pronged plug needs to have three-hole sockets with the use of the three-pronged plug is the middle of a stake is the grounding of the plug. Plug in the middle of a stake is the grounding protection line, it is interconnected with the inner liner and shell of the electric water heater, three-hole socket in the middle of a hole is grounded to protect the incoming line, if the home would have only zero fire two wires, you can give up the middle of a hole, do not connect to any line, left and right holes were connected to the zero line and the fire line (electrician said the left zero right fire), the three-hole socket over the wiring stake l connected to the incoming line of the fire line, N connected to the zero line, the center of the E is empty.