[Civil Engineering Version] Daily Question 20180318

Thread Content

In accordance with the provisions of the \"Code for Fire Protection Construction and Acceptance of Interior Decoration in Buildings\" (GB 50354), the construction of electrical equipment and lighting fixtures must meet the requirements specified in ( ). 　　a. When materials of a grade lower than B1 are used for decoration in rooms that contain distribution boxes and electrical control equipment, the distribution boxes must be made of non-combustible materials. b. The casing and base plate of the distribution boxes should be made of Grade A materials. Distribution boxes should not be installed directly on finishing materials of grade lower than B2. c) When the hot parts of electrical equipment such as power supplies, lighting fixtures, and electric heaters are in close proximity to materials of grade B1 or lower (including grade B1), or when wires pass through such finishing materials, they should be separated using porcelain tubes or fire-resistant sealing elements, and insulation made from grade A materials such as rock wool or glass wool should be used. d) Accessories installed within finishing materials of grade B1 or lower (including grade B1), such as sockets and switches, must be isolated using fire-resistant sealing elements or grade A materials with good insulating properties. e) When lights are installed directly on materials of grade lower than A (including grade B1), measures such as insulation and heat dissipation should be taken. Answers: ACD