【Electrical Version】Daily Question 20180306

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 lower than B1 grade are used for decoration in rooms containing distribution boxes and electrical control equipment, the distribution boxes must be made of non-combustible materials. b. The casing and bottom plate of the distribution boxes should be made of A-grade 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, ceramic tubes or fire-resistant sealing elements should be used for separation, and insulating materials of grade A such as rock wool or glass wool should be employed for heat insulation. d) Accessories installed within finishing materials of grade B1 or lower (including grade B1), such as sockets and switches, must be separated using fire-resistant sealing elements or insulating materials of grade A with good thermal insulation properties. e) When lights are installed directly on materials of grade lower than A (including grade B1), measures such as heat insulation and heat dissipation should be taken. Correct answers: ACD