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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.# {' L# {7 p2 i; w
The total nominal cross-sectional area of the conductors of flexible cables or cords suspending: m: q( L. x7 Q. `# \
pendants shall be such that the stress in the conductors does not exceed 15 N/mm2.
1 y Y. A* @& R4 a L/ EFor the calculation of the stress, only the conductors are considered.
1 p. h- j* j8 L' m: wWhere a luminaire of mass greater than 5 kg is intended to be suspended, the design of the
. U R+ a! Q# E m* Gluminaire or of the flexible cable or cord shall be such as to prevent any tension being applied
) O: l! ^. ]0 {( M7 c/ bto the conductors.
8 s- E, [$ x+ c6 S$ A( KNOTE 1 This requirement can be met by using a cable which incorporates suitable load-carrying cores. |
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