- How to choose an electrical outlet and light switch
How to choose an electrical outlet and light switch
The repairs in the house often associated with replacement of electrical fittings. What characteristics of the outlets and switches to look for when buying them?
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Types of sockets and switches
Range of modern electrical outlets and light switches is quite wide. A grounding outlet is different from conventional external earthing contact sockets with protective caps are used if necessary their installation in rooms with high humidity or outdoors, sockets with protective shutters that open when the introduction of the fork, simply necessary in the children's rooms to keep little inquisitive researchers from electrical injuries the electrical outlets with the function of ejection of the plug when you press the button on the case is indispensable in the kitchen, where frequent frequent changes of electrical appliances.
The light switches are divided into push-button, rotary, furniture and dimmers (devices for regulating the brightness of lighting).
Sockets and switches are of two types: for open wiring and concealed. The products of the first type operating mechanism is placed in a closed housing, and the assembling is done at the surface of the wall. Since the mounting for concealed wiring are mounted inside the wall, leaving the outside only cover their operating mechanism are made open.
For the manufacture of casings of switches and sockets used thermoplastic and Duroplast. Duroplast is durable, it does not remain scratches, it is resistant to high temperatures, but has a significant drawback – hopkok. Thermoplastics, in contrast, does not break, but bend, because it has a high ductility, however, is easily scratched and melted at high temperatures.
Wiring when choosing the product, it is useful to sniff him. Pronounced unpleasant odor will indicate that as a facing material is chosen for it is inexpensive and harmful type of plastic.
Level of protection
Choosing electrical fittings for installation in places with high content of dust and/or moisture, should be guided by their level of protection, expressed in the form of an IP code marked on the packaging of the outlet or switch. The first digit of two-digit relates to the ingress protection against dust and foreign objects:
Protection against objects larger than 50 mm
Protection against objects larger than 12 mm
Protection against objects larger than 2.5 mm
Protection from objects larger than 1 mm
Complete protection against dust
The second digit indicates protection of the product against moisture and water:
Protection against water drops falling vertically
Protection against water drops falling at an angle 1503
Protection against water drops falling at an angle 6004
Water jet protection
Protection against strong jets of water
Protection against temporary immersion in water
Protection against prolonged immersion in water
As can be seen from these tables, the lowest degree of protection are products with IP equal to 00, as protected as this index is 68.
Depending on how you connect the fittings to power wiring, sockets and switches are divided into 2 types: with screw-type terminals screwless and self-locking. Device with screw contacts are traditional and the most common. Are they simple and uncomplicated: two blades, between which is placed the end of the wire without insulation, combined with a small bolt. When tightening the bolt plates together, clamping between them a conductor.
Due to the fact that any conductor under the pressure of screws and plates eventually shrinks (collapses to a few hundredths of a millimeter), the contact connection is weakened. If after 2-3 months after the connecting devices do not perform the lift pin bolts, pretty soon the AC outlet or the breaker will get warm and fail. This is especially true of electrical outlets to which appliances with high power.
This disadvantage is missing in electroadjusting products with self-clamping contacts. Due to the hard spring which constantly presses on a metal plate, the contact between it and the Explorer has not waned, in servicing such devices do not need, and to make their connection, just insert the end of the conductor in the gap between the contacts and, with effort, cram it in the slot of self-locking contact.
Let the electric valves chosen will be reliable and trouble-free! Good luck to you!