We can often see the power distribution box. It's not a professional. We try not to touch it. Today, I'd like to add some taboos about the fire lighting power distribution box.

1. The fire lighting distribution box (board) was not inspected when entering the site

Consequences: the fire lighting distribution box (board) was not inspected before entering the site. It was often found after installation that: the second layer board had no special grounding bolt, the section of protective ground wire was small, the openable door with electrical appliances was not reliably connected with the metal frame with bare copper flexible wire, the connection between the wire and the appliance was not firm and there was reverse coil phenomenon, the screw mother did not use galvanized parts, and the wire diameter did not meet the requirements, There is no identification according to the color code, no card cabinet and electrical circuit diagram, unreasonable appliance layout and spacing, and no N and PE terminal block. Further modification of the delayed construction period also affects the quality.

2. The protection wire of fire lighting distribution box (board) is not in place, and the wire diameter does not meet the requirements

Consequences: the protective wires of the fire lighting distribution box (board) are not arranged from the terminals, but are connected in series by the box frame, the wire diameter is not set according to the requirements, and the protective ground wire is not set for the devices with over safe voltage at the door of the distribution box, which is easy to cause safety accidents.

3. The circuit name is not marked on the switch in the fire lighting distribution box (board)

Consequence: the switch in the fire lighting distribution box (board) is not marked with the circuit name, which brings inconvenience to the use and maintenance. If the switch should not be closed by mistake, it is easy to cause safety accidents.

4. The installation of electric appliances and instruments in the fire lighting distribution box (board) is not firm and smooth, and the spacing does not meet the requirements

Consequences: the electric appliances and instruments in the fire lighting distribution box (board) are not firmly installed, flat, and the spacing is not enough, which affects the use safety.

5. The detachable metal plate in the fire lighting distribution box (board) is not connected with the protective ground wire system

Consequences: the detachable metal plate in the fire lighting distribution box is equipped with all kinds of electrical accessories, and the protective ground wire is not connected, which is easy to cause electric shock accidents.

6. The laying of wires and pipelines in floor type distribution box is too low

Consequence: the pipe orifice of the wire and pipeline laid in the floor type distribution box is too low, which is easy to cause water and debris to enter into the pipe and reduce the insulation strength of the wire.

7. The fire lighting distribution box (board) uses wood material without flame retardant treatment

Consequences: if the fire lighting distribution box (board) is used in humid and dusty places, it is easy to mildew and leakage; In addition, the wooden box (board) without flame retardant treatment, easy to cause fire, is unsafe.

8. The fire lighting distribution box (board) is not firmly installed, and the elevation does not meet the requirements. When it is concealed, the edges around the panel are not close to the wall

Consequences: the installation elevation of the fire lighting distribution box (board) does not meet the requirements, the installation is not firm, the box is not vertical, when it is concealed, the edges around the panel are not close to the wall, affecting the use function, and the appearance is not good.

9. The lines in the fire lighting distribution box (board) are in disorder and not bundled

Consequences: the lines in the fire lighting distribution box (board) are messy, and the two-layer board in the box tightly presses the pipe orifice, which affects the wire into the box. If the wire is forced into the box, the insulation damage of the wire will be easily caused by a long time, and it is easy to cause a short circuit. The maintenance is inconvenient and the appearance is affected.

10. N and PE bus bars are not set in the fire lighting distribution box (board)

Consequence: the fire lighting distribution box (board) is not equipped with N and PE bus bars, which can not ensure the safe operation of the line.

So we should try not to touch some untouchable things. Once an accident happens, the consequences may be very serious.