How to distinguish light switches in a power outage

How to distinguish a light switch in a power outage

In accordance with the formal wiring method to judge, if the switch is up, its state is open, and vice versa if it is down, it is closed. But for the traditional pull cord switch, if it can be pressed down on the top, it is open, if pressed down will bounce back, it is closed. Therefore, to determine the state of the light switch, mainly depends on the type of switch used.

Household switch purchase method

1, in the purchase of household switch, we can through the naked eye way to buy. Usually good quality switch, its appearance is very flat, no burr phenomenon exists, and in the flame retardant is also very good, not easy to appear broken. Some switches, although the surface is smooth, but the color is pale, the texture is also very coarse, the flame retardant properties of this switch is very bad, very easy to be ignited.

2, buy household switch, you can personally try its flexibility. Generally speaking good switch, its panel directly with the hand is not able to remove it, you must use professional tools to remove. The poor quality of the switch, just a hand gently break it can be removed, this switch is used for a long time, it is easy to fall off, the interior aesthetics have a great impact.

3, selecting the switch, you can also listen to the way to judge by ear, with a hand gently press it on the key, if the quality is good, the sound will be relatively small, the feel is also very smooth. On the contrary, if the quality is not good, it will be louder, and the switch is not very smooth.