|
请参考4.14.2 The mass of the luminaire suspended by flexible cables or cords shall not exceed 5 kg.: d, L2 N. ]1 N) O# N" [
The total nominal cross-sectional area of the conductors of flexible cables or cords suspending2 t$ B% c4 U+ [/ M2 o
pendants shall be such that the stress in the conductors does not exceed 15 N/mm2.
2 f' M2 \1 ^$ f. v' a+ @+ eFor the calculation of the stress, only the conductors are considered.+ b) M6 j! P* t. Q' K; n
Where a luminaire of mass greater than 5 kg is intended to be suspended, the design of the* v6 S0 ^7 I1 }5 f4 d; ~# ^
luminaire or of the flexible cable or cord shall be such as to prevent any tension being applied
1 X, R# Y3 j+ {( [9 Yto the conductors.7 w G8 C8 M/ g
NOTE 1 This requirement can be met by using a cable which incorporates suitable load-carrying cores. |
|