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Common circuit regret
1, hot and cold water pipes mixed
White is a cold water pipe, red is a hot water pipe, and a cold water pipe and a hot water pipe are mixed together.
There are hidden dangers: the expansion and contraction rate of hot and cold water pipes is different. Due to thermal expansion and contraction, the cold water pipes burst and leak.
Standard operation: distinguish hot and cold water pipes according to color and operate strictly.
2, no insulation sleeve
During the construction, the wires are directly buried in the wall. The wires are not covered with insulating tubes, and the wire connectors are directly exposed.
There are hidden dangers: This is very unsafe, and may cause short-circuit of the wires due to some reasons, such as the aging of the wires, resulting in wire breakage; at the same time, once the wire is broken, it cannot be changed at all, only the wall knocks on the ground.
Standard operation: The wires must be laid with insulation sleeves on the outside, and the circuit joints should not be exposed on the outside. They should be installed in the line box. No joints are allowed between the distribution boxes.
3, free to split the waterway
In the case that the owner did not understand the decoration, he misled the owner to dismantle the waterway at random and wasted money.
There are hidden dangers: waste of money is only one aspect. Once it is not sealed or lacks pressure during the demolition of the waterway, it will lead to burst of water pipes.
Normative operation: When the pipeline is changed, it will move and it must not be moved when it is not.
4, strong and weak electricity placed together
Typical jerry cuts. Put strong electricity (such as lighting wires) and weak electricity (such as telephone lines and network cables) in a tube or box, and store less pipes, saving time and effort.
There are hidden dangers: There will be interference when making a call or surfing the Internet. At the same time, too much threading in a pipe also creates a risk of fire.
Normative operation: Strong and weak electricity should be routed separately. It is forbidden to share one pipe and one bottom box for strong and weak electricity.
5, the length is not enough without connection accessories
Because the length of the insulating tube is not enough, there is exactly a turn here, no connection fitting is placed, and a section is exposed at the intersection with the junction box.
There are hidden dangers: If you stay for a long time, it may cause leakage due to the aging of the line.
Normal operation: There should be something connected between the nozzle and the junction box.
Second-hand housing decoration notice lighting
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