Basic knowledge of electrician's multi-position switch: several switches are connected in parallel, and each switch controls its own lamp. It is also commonly called: double opening, triple opening or first opening, second opening, etc. Double control switch: two switches can control the same lamp at different positions, such as stairs, lobby, bedside, etc. , need to be wired in advance.
Light-emitting switch: The switch is equipped with fluorescent or weak light indicator, which is convenient for finding the position at night. Note: Switches with lights are expensive, and sometimes the lights will flicker when used with fluorescent lamps and ceiling lamps. After a few years, the fluorescence index will darken.
Dimming switch: it can be switched on and off, and the intensity of light can be adjusted by knob. Note: it cannot be used with energy-saving lamps and fluorescent lamps. At present, the maximum is 1000W, and Snell has this product.
10A: It can meet the electricity consumption quota of common household appliances.
16A: Suitable for indoor air conditioners or other high-power appliances. Note: The plug specification of electrical appliances will be greater than 10A.
Frame and panel: modular switch socket, which can change styles and colors and is easy to disassemble and assemble.
Blank panel: used to close the reserved box or abandoned hole in the wall.
Cassette: installed in the wall and embedded before wiring. At present, there are 86, 120/ 1 18, 146 and other specifications.
Multifunctional socket: it can be compatible with various plugs, such as flat round plug, flat three plug, American British round pin plug, square pin plug and so on. This socket is a non-standard socket, which is mostly used for socket converters (plugs).
Special sockets: English square holes, European round feet, American telephone sockets, grounding sockets, etc. Usually, export products are common, but the domestic market is extremely rare.
Information socket: Telephone, computer, TV and other common signal sources are connected to the socket. Because the market price of different brands of back-end plug-in modules is very different and the quality is uneven, they are generally divided into five categories and six categories due to different access lines.
Broadband TV socket: (5- 1000MHZ) adapts to high-frequency cable TV signals in individual communities, and its appearance is similar to that of ordinary TV sockets, but it requires higher anti-interference ability and wider frequency band coverage.
Television? FM socket: The function is the same as that of TV socket. The extra FM broadcasting function is rarely used, but it can be used as a two-bit TV, and the connection is very convenient. Just connect an incoming line, and the client will have two terminals that can be used at the same time.
Series TV socket (also called TV branch): There are one or more TV signal distributors behind the TV socket panel.
LED switch: Compared with fluorescent lamp switch and ordinary switch, simply speaking, LED is added inside, and the color can be customized generally. There are two kinds commonly used in the market: red (Snell) and blue (Qisheng).
Midway switch: used in conjunction with double-control switch to realize multi-point control of the same electrical appliance.
Bipolar switch: it is not a dual-control switch, but a product with higher safety protection requirements. The main feature is to control the zero fire line at the same time. At present, the procurement cost is relatively high, and there are basically first-line brands.
Hotel Series: 4A? Do not disturb? Please clean it up immediately? Just a moment, please. Wait for the doorbell switch; And a series of plug-in power switches, including ordinary cards, IC cards, induction cards and all-in-one cards.
Shaving socket (shaving socket): it is mainly a switch socket between 100V- 1 15V and 200 V-250 V.
Special switches: remote control switch, acousto-optic control switch, remote sensing switch, speed regulating switch, audio switch, 220v-1/0v changeover switch, 25A three-phase four-wire socket, volume switch, mechanical air volume switch, channel selection switch, 13A three-pole square corner socket, 20A three-pole socket, lightning protection switch, etc. , generally used in special occasions.
The electrician knows the map and formula, and then he knows the electrogram. There are methods, learning essentials and shortcuts.
Look at the wiring principle in detail and remember thousands of data.
Title bar, parts list, reading instructions, drawing number,
First from the whole to the local, and then from the power supply to the load.
Look carefully at the main circuit and don't forget the auxiliary circuit.
There is an order from top to bottom, and there is no omission from left to right.
Energy path, information flow, various charts, to understand,
Analyze the signal line from power supply to load and secondary circuit.
Keywords bill of materials, construction manual, general requirements, catalog number,
Look at the detailed description of the drawings, and the key points will be clear.
Look at the principle, divided into main and auxiliary, AC, DC, subdivision
Look at each circuit of the power supply first to ensure clear measurement and control.
Installation diagram, according to the main auxiliary, through the line, to the load,
Don't forget that the power supply is section by section, and the components are connected in sequence.
Development diagram, reading, according to principle, in the loop,
Function keys of electrical components are drawn between lines respectively.
Plans, profiles, civil engineering, pipelines,
The electrical equipment has a location. Look at the size and projection carefully.
Keywords connection line, transmission information, display logic, connection function,
Although the multi-line representation is troublesome, it is intuitive, detailed and easy to distinguish.
The single-line method is also simple, with three phases and symmetry.
Keywords single drawing mutual inductance relay, multi-line text detailed explanation,
Apply light and shade, thick and thin lines, add text, draw diagonal lines,
Mark all types of conductors, mark the middle with wide and thick sections,
Keywords cross, t-shape, conductor crossing, connection or not,
Just look at the small dot in the middle, which is clear and easy to distinguish.
Keywords insulated wire, to be marked, dependent end, independent wire,
Combination mark function key, phase protection between polarities.
Keywords component, drawing number, simple shape, element number,
Centralized representation of simple graphs, separate representation of extended graphs,
Keywords working state, normal drawing, contact point, direction,
It's a rule to turn left and turn right. Remember to turn on and turn off!
Set value, data number, in the attachment, marked,
Note marks should be clear and terminal graphics should be small.