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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.
' Q4 d. j/ P2 q2 `' D& I/ C3 nThe total nominal cross-sectional area of the conductors of flexible cables or cords suspending) e: t: D; O- g/ Y' {
pendants shall be such that the stress in the conductors does not exceed 15 N/mm2.
4 f4 I3 j* ]/ _5 E2 MFor the calculation of the stress, only the conductors are considered.' K; B. x1 u- V! o
Where a luminaire of mass greater than 5 kg is intended to be suspended, the design of the" m( n3 R9 p# G; I& N
luminaire or of the flexible cable or cord shall be such as to prevent any tension being applied
$ O9 `, G! C* y% y& i( K' b6 z9 Jto the conductors.
6 c' m3 Q- o v' fNOTE 1 This requirement can be met by using a cable which incorporates suitable load-carrying cores. |
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