DSH 442 Interpretation of in close proximity or within a distance of 3mm

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DSH 442

Interpretation of “in close proximity" or “within a distance of 3 mm"

30.2

60335-1(ed.3) 0 F6 y2 l' ]0 P: H

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Standard: IEC60335-1:1991, 3rd Ed
Sub clause: 30.2
Sheet No.: DSH-442
Subject: Interpretation of “in close proximity" or “within a distance of 3 mm"
* d& x) ^* W8 j) y, TKey words:  -close proximity   - within a distance of 3 mm
; H2 m9 o& Y1 l& L' `. e$ b* rDecision taken at the 40th CTL meeting 2003.
9 @2 s( [5 m6 u7 c8 B8 _8 yQuestion:
/ d0 o- G  h( ]* d5 a# gIn the note of sub-clause of 30.2.2 of IEC60335-1:1991, 3rd Ed. , "In close proximity" is
considered to be a distance not exceeding 3 mm. Some say the distance means clearance or
Creepage distance and the others say it means shortest distance regardless of any non-metallic
materials between them. How should it be interpreted?
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