|
请参考4.14.2 The mass of the luminaire suspended by flexible cables or cords shall not exceed 5 kg.
1 E' M7 K! _. w/ r! VThe total nominal cross-sectional area of the conductors of flexible cables or cords suspending ^4 b6 w2 e1 \+ ?; |
pendants shall be such that the stress in the conductors does not exceed 15 N/mm2.3 h& X( y2 l: o4 K9 s/ A
For the calculation of the stress, only the conductors are considered.4 G h9 i+ f+ G7 y+ u- E4 j+ s
Where a luminaire of mass greater than 5 kg is intended to be suspended, the design of the
) \+ K' x ]# o+ c4 U3 eluminaire or of the flexible cable or cord shall be such as to prevent any tension being applied6 b$ G' |4 |0 P
to the conductors.
; j! p8 I; S3 v/ T: ~NOTE 1 This requirement can be met by using a cable which incorporates suitable load-carrying cores. |
|