|
60598里的规定:
; D) w8 ?0 ^2 F* \; X- @* C8 u" P9 B8 M# l$ b2 F3 m( Y
A current of at least 10 A, derived from a source with a no-load voltage not exceeding 12 V,' c& I$ n' [% ~ X) Y7 @4 x, b# m
shall be passed between the earthing terminal or earthing contact and each of the accessible4 L1 H% j* b% n5 r3 D5 Q
metal parts in turn.
% y8 h0 G( `4 i- B; I9 o4 M& a* ]* n( Q4 j" P2 E6 g/ |
The voltage drop between the earthing terminal or earthing contact and the accessible metal# W9 {+ h8 S* ^& U7 T" F3 B+ [
part shall be measured and the resistance calculated from the current and the voltage drop. In
( C/ `1 L' t$ X* V: _5 G7 rno case shall the resistance exceed 0,5 Ω. When type testing, the current shall be applied for a
6 \* v U) ^( U; ~7 U3 U$ kperiod of at least 1 min.
$ U5 }6 H* b3 h r
8 U2 v5 `1 P) `1 e+ W7 JNOTE :In the case of a luminaire with a non-detachable flexible cable for the supply connection, the earthing contact is at the plug or supply end of the flexible cable or cord. |
|