DSH 535 Reduction of clearance and creepage distance

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DSH 535

Reduction of clearance and creepage distance 9 h1 B6 \9 ?' {- n5 R

54

60601-1(ed.2);am1;am2 . e/ F( B* [! f9 @( {6 q/ F0 \0 o

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Standard(s)- (year and edition):
* x; I2 ~, D( [5 D* RIEC 60601-1:1988+A1 +A2
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54
Sheet n°: 535
! w% p' y% R/ N% `- ^( \Subject:
# B% [5 @! v' |- r9 lReduction of clearance and
5 ~# P  f$ o8 t  m  Rcreepage distances
2 t1 E$ I1 o, s/ d. `6 nKey words:
; P* Z  ]$ `! hClearance, creepage, reduction,
2 i5 x# G2 v3 ]7 {, X2 xtracking resistance
' i8 E7 l1 x  b. c4 A9 }Decision taken at the 40th
* a. u. n5 e+ ~& O# F: h7 Wmeeting 2003
8 ?5 F$ w, g: x  _  G, ~Question:
2 ?/ k: w9 c1 @( d* {% I5 MIs it permitted to reduce the creepage and clearance requirements of clause 57.10 based on evidence that
the material being assessed has a high resistivity to tracking?
If it is permitted, what IEC Publication should be used as a guideline in determining the permitted
reduced creepage and clearance distances?
! X% p& ~, w7 B/ g; ^0 Z. [Decision:
8 k+ `! D( u9 q# l2 Z6 `/ sThis edition of the standard does not allow reduction in clearance and creepage distance.
Explanatory notes:
This problem will be transferred to SC62A/WG14 to make a recommendation to the 2nd edition do deal
7 B* D* a7 v  ^; Y: Mwith this issue. The 3rd edition will address this issue.
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