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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.9 J' V0 o: N8 T9 p' }2 n1 ~
The total nominal cross-sectional area of the conductors of flexible cables or cords suspending
0 l% s5 y& {4 N6 _( Q' D- Gpendants shall be such that the stress in the conductors does not exceed 15 N/mm2.' e3 y. z( C1 B. j: }$ ~
For the calculation of the stress, only the conductors are considered.
U2 `% ]" v' \: ZWhere a luminaire of mass greater than 5 kg is intended to be suspended, the design of the2 |" J4 \3 D5 g' Q8 t7 }+ ^0 l
luminaire or of the flexible cable or cord shall be such as to prevent any tension being applied
6 j* y1 x6 @. m! Lto the conductors.
; {( Y# ~$ `$ v' m9 N- a. uNOTE 1 This requirement can be met by using a cable which incorporates suitable load-carrying cores. |
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