Change the name for convenience of memory).
(Figure 2 distribution box system for residential users) Note: the electrical discipline shall provide the installation size and location of the selected lighting distribution box to the architectural discipline, so as to reserve holes during construction.
Each single switch controls 1 longitudinal fluorescent lamp.
The installation position of the switch is 1.4m above the ground.
If the number of wires has been marked on the drawing (i.e.
When arranging lamps and setting out, “phase line enters the switch and zero line enters the lamp cap” , this is the most basic knowledge.
Since the control of the whole lighting electrical circuit is involved in the wiring process, we should first introduce the composition of the lighting circuit.
Lighting design has more and more strict requirements for lamp wiring, which makes the wiring problem more and more complex.
Only when there are three or more conductors, the number of conductors is indicated by a short slash (this example diagram is convenient for illustration, and the number of conductors is also indicated in the case of two conductors)..
1 basic distribution form of lighting circuit) the commonly used indoor lighting distribution box system is shown in Fig.
The seven examples in the attached drawings can be seen by comparing the electrical plan and the actual wiring diagram , the number of paying off wires varies with the number of switch controlled lamps.
When the switch is single pole, the number of wires from the power incoming line and the switch to the lamp is two.
Generally, for complex large-scale projects, errors are easy to occur in the process of light layout and wiring, so this paper summarizes the wiring skills according to practical experience.
If it is laid through concealed pipes, it should be more careful to avoid less or missing wires, which will cause difficulties to the construction.
(2) There are many kinds of connection switches between switches and lines.
Especially for beginners, it is very easy to check more lines, less lines and wrong lines in the design process, which makes the design into a chaotic state, causing damage to electrical equipment and even serious electrical accidents.
There are two ways to connect the lighting circuit, the common head wiring method.
During the layout of lamps, there may be great differences in wiring due to different positions.
Building electrical switches mainly include seesaw switch, pull switch, speed regulating switch and energy-saving switch, and their installation methods include open installation and concealed installation.
The room lighting power supply is generally led from the lighting terminal box of the floor, as shown in Figure 1.
(Fig.
As shown in Figure 3 As shown in Figure 4: (Figure 3 direct wiring method) (Figure 4 common head wiring method) (3) In the lighting wiring design, three kinds of wires are involved: 1) phase wire: commonly known as live wire, symbol: L.
The circuit is simple and clear, not easy to make mistakes, and the idea is clearly visible, as shown in Figure 6 (Figure 6 actual lighting design drawing of the project) the lighting plan can only be arranged by reading the electrical lighting plan.
3) protective wire: commonly known as ground wire, symbol: PE.
the number of lamps in the drawing is marked with a short oblique line) the setting out can be carried out accordingly during installation; if the number of lamps is not marked, the electrician needs to think independently to complete the setting out.
The power supply of floor lighting terminal box is led from the general distribution box of the building or the transformer low-voltage distribution panel of the building.
Example of lighting control wiring: take class 0 lamps as an example to wiring the classroom.
Illuminators and sockets are usually connected in parallel at both ends of the power incoming line, Phase line (commonly known as live wire) it is connected to the lamp cap through the switch, the zero wire is directly connected to the lamp cap, and the protective grounding wire is connected with the metal shell of the lamp.
Although the common head wiring method consumes more wires, the wiring is reliable and is a widely used installation and wiring method.
2 as the civil residential distribution box system.
(1) lighting distribution box.
5) wiring Description: zero wire shed: pass the zero wire from the lighting distribution box through all lamps, that is, the position of all black wires in the figure: live wire in switch: live wire from the lighting distribution box is led into the switch when it encounters the switch; outgoing control wire: live wire from the switch becomes control wire, and several control wires are led out from several switches (in fact, the control line is the live line.
The conductor can only be connected through switches and equipment The installation wiring method in which no joint is allowed in the middle of terminal lead and conductor is called common head wiring method.
When the incoming power supply is three-phase, pay attention to the load distribution and try to achieve three-phase load balance.
Therefore, for the convenience of wiring, the wiring formula is to sum up the wiring by yourself: wear in the zero wire shed , live wire in switch.
Each illuminator, socket, switch, etc.
In the process of electrical lighting design, the designer shall first carry out preliminary design according to the standard requirements of illuminance, and then select various electric light source equipment, design lighting mode, determine the type, installation mode and position of lamps, determine their installation method, design distribution lines, select switching appliances Select the cross-sectional area, model, specification and number of wires.
(Fig.
The simplest Figure 1 is a switch control lamp.
Partner with zero: a control line shall be arranged at all parts with zero line (Figure 5 lighting wiring design drawing taking the classroom as an example) the lighting design drawing of typical building engineering applies wiring formula for wiring.
However, it is not enough to know only these, but also the number of paying off wires between lamps and lanterns.
The control lighting circuit of lighting electrical circuit is generally composed of four parts: power supply Control protectors (miniature circuit breakers and switches), lines and loads (lamps and sockets).
are directly connected from the power main line, and the installation wiring method with joints allowed in the middle of the conductor is called direct wiring method.
Seesaw switch is generally installed on indoor load-bearing wall, and the concealed installation method is adopted.
However, it is not easy to do this, because the electrical lighting plan on the design drawing is different from the representation on the actual wiring diagram.
In the design, the number of conductors is generally not marked when there are two conductors.
2) neutral wire: commonly known as zero wire, symbol: n.
Come out of the control line and partner with zero.
The rated current value of on-off contact is 10ao, and each wiring terminal can only be connected with two 2.5mm2 copper conductors in parallel Therefore, in the graphic design, there are as few branch lines at the switch as possible.
