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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." d! L$ M" R# x3 x: |- ?& {4 ]
The total nominal cross-sectional area of the conductors of flexible cables or cords suspending4 l; r6 [) n5 C* f3 ?- }
pendants shall be such that the stress in the conductors does not exceed 15 N/mm2.% C' @" O* h# P E1 T# K
For the calculation of the stress, only the conductors are considered.
. Y: d8 l! F) q) x. o |* O. QWhere a luminaire of mass greater than 5 kg is intended to be suspended, the design of the
5 S5 H6 j( F& R& v. e: F4 Jluminaire or of the flexible cable or cord shall be such as to prevent any tension being applied& v2 g" I( v5 m* e' K% Q2 X+ M# Q
to the conductors.
: M3 X9 D; j' f& O3 M' jNOTE 1 This requirement can be met by using a cable which incorporates suitable load-carrying cores. |
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