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请参考4.14.2 The mass of the luminaire suspended by flexible cables or cords shall not exceed 5 kg.
4 |" o3 g* y/ k" \" h* rThe total nominal cross-sectional area of the conductors of flexible cables or cords suspending9 }. L8 ]9 j% l3 N2 u- e/ \1 ]: \
pendants shall be such that the stress in the conductors does not exceed 15 N/mm2.
3 d6 m+ T$ ^0 _* ~9 [) }9 YFor the calculation of the stress, only the conductors are considered.
- H0 \4 [( G6 v5 WWhere a luminaire of mass greater than 5 kg is intended to be suspended, the design of the
9 Q" X6 z) `2 _) uluminaire or of the flexible cable or cord shall be such as to prevent any tension being applied7 F1 Q& }0 } @- g$ d+ `. ^
to the conductors.
1 A% N: R( [# a7 d0 ]8 G6 S+ D1 a# ENOTE 1 This requirement can be met by using a cable which incorporates suitable load-carrying cores. |
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