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GB 50217-2018 第3.4.2条 Standard for Design of Cables in Power Engineering

Cable selection电气工程

GB 50217-2018 第3.4.2条

| **** | Cable flame-retardant grade requirements: In densely occupied areas (such as hotel lobbies, guest room floors, and corridors), cables laid in bundles in cable trays or trunking should be flame-retardant Class A or Class B (ZA-YJV/ZB-YJV) to reduce the risk of fire spread. |

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