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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.
5 ?8 q9 X+ Y! E: lThe total nominal cross-sectional area of the conductors of flexible cables or cords suspending
8 Z& b5 }. w' I3 ?pendants shall be such that the stress in the conductors does not exceed 15 N/mm2.
- T1 e6 v s, N& f' m2 z* T7 b" H! hFor the calculation of the stress, only the conductors are considered.
- w/ Z( w' Y1 g' f6 \Where a luminaire of mass greater than 5 kg is intended to be suspended, the design of the
; {) L( q, a' n# |luminaire or of the flexible cable or cord shall be such as to prevent any tension being applied
6 A) k5 o6 h' z+ O5 vto the conductors.& j* L/ c9 \( ~. v, @
NOTE 1 This requirement can be met by using a cable which incorporates suitable load-carrying cores. |
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