How to buy a wall switch, wire, and line tube?

- Selection of wires

For fire protection, maintenance and safety, it is best to use the “GB” copper core wire marked by the Great Wall logo. The wire trough load area is generally: 2 × 2.5 as the main line, trunk line, 2 × 1.5 as a single electrical Branch line, switch line. The single-phase air-conditioning special line uses BVV2×4, and it is equipped with a special ground wire.

The green and yellow color lines are used for the connection lines, and any one of red, white, black and purple is used for the switch lines (fire lines). However, the color of the thread used in the same home improvement project should be consistent.

- Selection of threading pipe

The flame-retardant PVC line pipe is used for the threading pipe. The surface of the pipe wall should be smooth, and the wall thickness must reach the strength that the finger does not break. It should have a certificate of conformity. It is also possible to use a special galvanized tube of the national standard as a threading tube.

- Selection of materials and installation requirements for switch panels and sockets

The size of the panel should be consistent with the size of the embedded junction box; the surface is bright and clean, the brand logo is obvious, there are security signs and the national Great Wall logo of the electrical safety certification; the switch feels flexible when the switch is turned on, the socket is stable, and the copper sheet must have a certain thickness; The panel material should be flame-retardant and sturdy; the switch height is typically 1200 to 1350 mm, the door frame edge is 150 to 200 mm, and the socket height is typically 200 to 300 mm.

Switching sockets are safe or not, which has a great relationship with the connection of internal wires. The most advanced connection method at present is the quick-connect terminal structure. This kind of structural connection is simple. Only by inserting the wire into the terminal part, the connection is completed, but the wiring state is even and orderly and firm. Even if a bowling ball is hoisted, the connection will not fall off. The live parts are not exposed, so there is no danger of electric shock during construction.

The protection door device is also a reflection of the safety of the switch socket design. In life, young children often enter their sockets with their fingers or other objects because of their naughtiness and curiosity. As a result, there have been many casualties. For this purpose, two automatic slides are mounted in the socket, and only when the plug is inserted, the slide slides open on both sides to expose the socket; when the plug is pulled out, the slide closes and the plug is blocked, avoiding the above The accident occurred.

There are also switch sockets specially designed for kitchens and kitchens. Water splash boxes or plastic baffles are installed on the panels to effectively prevent oil and water vapor intrusion, prolong service life, and prevent short circuit due to moisture.

When you buy the switch and socket, you can pay attention to the following items:

1. Look at the appearance: The style and color of the switch should match the overall style of the room. For example, if the overall color of the interior decoration is light, then black, brown, and other dark switches should not be used.

2. Look at hand: good quality switches are mostly made of high-grade materials such as bulletproof rubber, fireproof performance, moisture resistance, anti-impact performance, etc. are high, the surface is smooth, you should consider when buying your own feel up touch, with the handle initially determine the switch The material and ask the dealer. In general, products whose surface is not smooth and which have a thin, brittle feel are unreliable. The panel of a good switch socket requires no bubbles, scratches or smudges. The touch of the switch is light but not tight, and the socket of the socket needs to be equipped with a protective door. The plug must be plugged and unplugged to a certain degree of force and cannot be inserted on one foot.

3. Look at the weight: When purchasing a switch, you should also weigh the weight of a single switch. Because only the copper thickness inside the switch, the weight of a single switch will be large, and the inside of the copper is the most critical part of the switch, if the alloy or thin copper will not have the same weight and quality.

4. Look at the brand: encourage everyone to use well-known brands. Because the quality of the switch is related to the normal use of electrical appliances, and even the convenience of living. Many dealers in the interview have expressed the same view, that is, many of the switches or sockets produced by small factories in Guangdong and Wenzhou are not reliable, and they simply cannot be used for a long time, and frequent replacement is obviously very troublesome; but most of the well-known brands Will make effective commitments to consumers, such as "available 15 years", "guarantee 12 years of service life", "can be continuously switched 10000 times" and so on.

5. Look at the service: As far as possible, go to a store or point of sale designated by the regular manufacturer to purchase, and ask for a shopping invoice, so as to ensure that you can enjoy the after-sales service in the future.

6. Look at the mark: Pay attention to the identification on the base of the switch and socket: including CCEE, rated current and voltage.

7. Look at the packaging: There should be a clear manufacturer's address phone number on the packaging surface, with instructions and certificates.

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