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" 9 q5 B4 m# g7 }7 {" R

30.2

60335-1(ed.3) ; E# h% \6 ?/ w2 b0 y# l2 H

" i$ {2 J( V. Q, X, X5 f# S, nStandard: IEC60335-1:1991, 3rd Ed
Sub clause: 30.2
+ |: x* J$ l% zSheet No.: DSH-442
' D+ P+ g# n1 o; I  q7 vSubject: Interpretation of “in close proximity" or “within a distance of 3 mm"
Key words:  -close proximity   - within a distance of 3 mm
Decision taken at the 40th CTL meeting 2003.
5 g1 p/ y3 A' D3 Q1 s$ D* SQuestion:
! p  s) I: m4 ZIn 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
8 w9 w0 }! a( }& b# Dmaterials between them. How should it be interpreted?
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