1) The power equipment cable shall not be laid in the same trench with the pipeline conveying class A, B and C liquid, combustible gas and power.
2) The distribution line shall not pass through the inner cavity of the ventilation pipe or be laid on the outer wall of the ventilation pipe. The distribution line protected by metal pipe can be laid close to the outer wall of the pipe.
3) When the distribution line is laid in the closed roof with gunpowder, it should take fire protection measures such as metal pipe; when it is laid in the ceiling with combustible materials, it should take fire protection measures such as metal pipe, closed metal trunking or plastic pipe of flame-retardant materials.
4) When switches, sockets and lighting fixtures are close to combustibles, anti-inflammatory protection measures such as heat insulation and heat dissipation shall be taken. The lead-in wires of halogen tungsten lamps, ceiling lamps, trough lamps and embedded lamps with rated power not less than 100W of incandescent lamps of Harbin Electric complete equipment shall be protected by incombustible materials such as porcelain tube and mineral wool. Incandescent lamps, halogen tungsten lamps, metal halide lamp light sources, fluorescent high-pressure mercury lamps (including manual inductive ballasts) with power over 60W shall not be directly installed on combustible decoration materials or combustible components.