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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.8 G: Z% f4 P# x6 z. K. R2 y
The total nominal cross-sectional area of the conductors of flexible cables or cords suspending: V- Z. ]" ]% k ?) }, }9 f/ D" F' A
pendants shall be such that the stress in the conductors does not exceed 15 N/mm2.3 ]) \7 ~( q( B$ L3 N
For the calculation of the stress, only the conductors are considered.
0 w( Q: v6 ^7 q5 s( iWhere a luminaire of mass greater than 5 kg is intended to be suspended, the design of the6 u& F" d7 N k7 I! M. O
luminaire or of the flexible cable or cord shall be such as to prevent any tension being applied" \& j+ K, y0 b* N) v' ^* r
to the conductors.4 N0 M( n0 q6 l( f
NOTE 1 This requirement can be met by using a cable which incorporates suitable load-carrying cores. |
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