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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.+ p+ B$ W% X' \$ E- o: n5 a T# s( J0 \
The total nominal cross-sectional area of the conductors of flexible cables or cords suspending
# X6 W, U$ @2 jpendants shall be such that the stress in the conductors does not exceed 15 N/mm2.
8 k* x3 I# B! z4 c3 uFor the calculation of the stress, only the conductors are considered.- i/ J( J: a0 M; S, t' R6 i
Where a luminaire of mass greater than 5 kg is intended to be suspended, the design of the
; A2 M/ s5 a. V! F# R- f' rluminaire or of the flexible cable or cord shall be such as to prevent any tension being applied
* t/ p- G) Y+ H9 `2 Pto the conductors.
4 x2 \9 F0 I5 P) h7 i& J0 r# RNOTE 1 This requirement can be met by using a cable which incorporates suitable load-carrying cores. |
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