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对于火花测试,UL 2556中有要求,会涉及到接地问题(包括收放线,火花机)& T9 `* {: ?: |0 M4 u
6.7.3 Preparation of specimens$ c( h3 N7 Y! D& a& H
6.7.3.1 If the conductor coming from the pay-off reel is bare, the conductor shall be earth-grounded prior, T+ S) Y0 r9 z2 ]
to the insulating process.
. L$ H5 C0 z! Q: M6.7.3.2 If the conductor coming from the pay-off reel is insulated, an earth-ground connection shall be
. T- U% H- ^5 e4 F7 nmade at either the pay-off or take-up reel. For 5.26 mm2 (10 AWG) and smaller-sized single-conductor
6 Q# @; v7 l, V) H* E H8 Rcables, an earth-ground connection shall be made at both the pay-off and the take-up reels unless the
3 D: y+ N1 g* x& G' O0 Cconductors have been tested for continuity and found to be of one integral length.
! i" L* V& o* ?6.7.3.3 For other cable constructions, the outermost conductive components shall be earth-grounded.0 H' R' b" w5 ]# p
6.7.3.4 Each earth-ground connection shall be bonded directly to the earth ground of the spark tester. |
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