Brief content: the electrical piping in the suspended flat roof shall be in accordance with the requirements of exposed piping, and the piping shall not be fixed on the hanger or keel of the flat roof. The setting of lamp cap box and junction box shall be convenient for maintenance, and cover plate shall be added. The length of hose connected to the lamp position shall not exceed 1m. Both ends of the hose shall be firmly connected with the junction box and lamps with special connectors. The metal hose itself should be grounded. All kinds of strong and weak current conductors shall not be exposed in the ceiling.

(1) Basic requirements

1.1 each household shall be equipped with a household distribution box, which shall be equipped with a leakage circuit breaker. The leakage action current shall not be greater than 30mA. It has overload and overvoltage protection functions, and has multiple outgoing lines to control lighting, air conditioning, sockets, etc. respectively. Its circuit shall ensure the normal use of the load.

1.2 the laying of conductors shall be carried out in accordance with the provisions of decoration design, and the short-circuit protection, overload protection, selection of conductor section and installation of low-voltage electrical shall be carried out in accordance with the current national standards and relevant provisions of Shanghai.

1.3 indoor wiring shall be laid through pipes except through hollow floors, and single stranded copper conductor with good insulation shall be used. When laying through pipes, the total cross-sectional area of the wires in the pipes shall not exceed 40% of the cross-sectional area of the inner diameter of the pipes, and there shall be no joints and kinks in the pipes. Conductors and telephone lines, closed-circuit television lines, communication lines, etc. shall not be installed in the same pipeline.

1.4 the selection of lighting and electric heating load wire diameter and section shall ensure that the safe carrying capacity of the conductor is not greater than the sum of the rated currents of all electrical appliances in the branch, and the capacity of each branch is not allowed to exceed the capacity of the incoming line.

1.5 the grounding protection shall be reliable, and the insulation resistance between conductors and between conductors to ground shall be greater than 0.5m Ω.

1.6 the wall thickness of PVC plastic conduit entering the house shall not be less than 1.2mm.

1.7 ordinary sockets shall not be used for the installation of electric heaters, and they shall not be directly installed on combustible components. The toilet socket should be splash proof.

1.8 the socket shall be no less than 200mm above the ground. The conductor in the junction box should have allowance, and the length should be 150mm. When wiring, the phase line enters the switch, the zero line directly enters the lamp cap, and the phase line of the screw lamp cap should not be connected to the shell. The height of the lighting lamp from the ground should be 1.3mm, and the switch should not be installed behind the door.

1.9 the electrical piping in the suspended flat roof shall be in accordance with the requirements of exposed piping, and the piping shall not be fixed on the hanger or keel of the flat roof. The setting of lamp cap box and junction box shall be convenient for maintenance, and cover plate shall be added. The length of hose connected to the lamp position shall not exceed 1m. Both ends of the hose shall be firmly connected with the junction box and lamps with special connectors. The metal hose itself should be grounded. All kinds of strong and weak current conductors shall not be exposed in the ceiling.