1.1 Each household shall be equipped with a separate distribution box. The leakage circuit breaker shall be provided in the distribution box. The leakage current shall not exceed 30mA. There shall be overload and overvoltage protection functions, and the points shall be routed out to control the lighting, air conditioning, sockets, etc. respectively. The loop should ensure the normal use of the load.
1.2 The laying of conductors shall be carried out in accordance with the decorative design provisions. Short-circuit protection, overload protection, selection of conductor cross-sections, and installation of low-voltage electrical installations shall be carried out in accordance with current national standards and relevant regulations of Shanghai.
1.3 The indoor wiring shall be laid through pipes in addition to the hollow floor, and a well-insulated single-stranded copper conductor shall be used. When laying through pipes, the total cross-sectional area of ​​the conductors in the pipe shall not exceed 40% of the cross-sectional area of ​​the pipe's inner diameter. There shall be no joints or kinks in the pipe. Wires and telephone lines, closed-circuit television lines, communication lines, etc. must not be installed in the same pipeline.
1.4 The cross section of the lighting and electric heating load shall be selected so that the safe ampacity of the conductor is not greater than the sum of the rated currents of all the electrical appliances in the branch, and the capacity of each sub-route shall not exceed the capacity of the incoming line.
1.5 The grounding protection shall be reliable, and the insulation resistance between the conductors and between conductors shall be greater than 0.5MΩ.
1.6 The thickness of the wall of the PVC plastic conduit for entering a household shall not be less than 1.2mm.
1.7 The heater installation shall not use ordinary sockets and shall not be directly installed on combustible components. Bathroom sockets should be splashproof.
1.8 The outlet should not be less than 200mm from the ground. There should be a margin in the wire inside the box, and the length should be 150mm. When the wiring phase into the switch, the zero line directly into the lamp, screw mouth lamp phase line should not be connected to the shell, the lamp opening distance from the ground should be 1.3mm, the switch should not be installed after the door.
1.7 The electrical piping in the suspended ceiling shall be in accordance with the requirements of the open piping and the piping shall not be fixed on the flat top hanger or keel. The configuration of the lamp box and junction box should be easy to repair and cover plate. If the hose is used to receive the lamp, its length should not exceed 1m. Hose applications at both ends of the dedicated connector and junction box, lighting fixtures. The metal hose itself should be grounded. All kinds of strong and weak wires must not be exposed in the ceiling.
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Ningbo Jingcheng Technology Co., Ltd. is a professional Ultra-sonic Heat Meters manufacturer.
Jingcheng Heat Meters are measuring devices for a precise consumption metering. For measuring the heat which, in a heat-exchange circuit, is absorbed or given up by water called the heat-conveying liquid.From the start, we have developed innovative products based on the technology in dialogue with our customers. The result is a collection of well-engineered measuring instruments proved time and again in practice, because exact consumption values are only possible with precise measuring technology.
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