|
请参考4.14.2 The mass of the luminaire suspended by flexible cables or cords shall not exceed 5 kg.& y9 r9 ?1 A3 X
The total nominal cross-sectional area of the conductors of flexible cables or cords suspending
7 u' @6 F: U: r6 Q6 xpendants shall be such that the stress in the conductors does not exceed 15 N/mm2.) v* H7 d% m( z) X& _
For the calculation of the stress, only the conductors are considered.0 W' k/ g F2 K- X2 \
Where a luminaire of mass greater than 5 kg is intended to be suspended, the design of the: o% R1 v3 ]* S
luminaire or of the flexible cable or cord shall be such as to prevent any tension being applied
0 x8 }4 \5 {: n2 I Fto the conductors.
1 h4 f% T0 g4 @% T3 C" \5 U- c7 GNOTE 1 This requirement can be met by using a cable which incorporates suitable load-carrying cores. |
|