Recently it seems that often hear the use of electric water heater, leakage of electric injury incidents, and for this kind of news, many people will choose to unplug the electric water heater when taking a bath, once to avoid the danger of electric shock. This seems like a good idea, but if the electric water heater itself has a circuit or electrical problems, then in the process of plugging, it is also a dangerous move.

Household appliances plug, generally have two eye plug and three eye plug these two, since two eye plug can normal use of electrical appliances, then why there is a three eye plug? Household 220 volt single-phase electricity, divided into live line and neutral line, provides a circuit of electrical appliances, electrical appliances can be used normally.

If that’s the case, why the three-eye insertion? Three-eye socket, is left zero right fire on the ground way to wire, some electrical switch, according to this principle, the switch is set on the fire line, so that when the electrical switch is off, the back end is no longer with a point, so for the use of electrical appliances, more safe.

So the upper ground of the three-eye plug, what is used? We will find that the general application of three-eye plug, mostly in the larger power of the electrical will see, at this time the electrical shell, will be through the wire, connected to the plug of the ground wire, in the case of leakage or induction, when people contact the electrical shell, because the resistance is greater than the ground wire, so as to avoid the danger of electric shock.

On the contrary, if there is no grounding wire, or grounding resistance is very large, then once the electrical housing is charged, then the risk is greatly increased.

Although now home decoration, distribution box will certainly be equipped with leakage protector, but does not say that the ground wire is not important, once the protector device problems, then the danger still exists.

When we unilaterally pay attention to horizontal and vertical, in fact, we should pay more attention to the correctness of wiring, although the line is not complex, but the wrong situation is often encountered, so there are several points we should pay special attention to:

1. The air switch and leakage protector in the distribution box are double-in and double-out switches. If there is no mark, follow the left fire and right zero.

2, with leakage protector in the branch, the fire zero line can not be mixed with other branches of the line.

3, the light switch must fire wire into, to ensure that off the case, the lamp is not charged.

4, the socket must be left zero right fire, three eyes inserted on the top of the ground wire.

5. Test the effectiveness of leakage protection for the leakage protector once a month. Press the test button.

Someone said, I do not understand the circuit, how can I go to check ah, very simple, home decoration line, generally use four colors, red fire line, blue zero line, yellow and green ground line, there is a multi-control switch control line. As far as the wiring is concerned, just look at the color.