DSH 535 Reduction of clearance and creepage distance

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DSH 535

Reduction of clearance and creepage distance

54 # l$ A' Z& X: H& P0 m# R9 O

60601-1(ed.2);am1;am2 - x2 {; ~, k* k7 f3 T7 U) u0 w

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) U1 u6 p& w% z( n! i$ aStandard(s)- (year and edition):
2 O3 G+ c! ?' O% S8 }$ f3 s) qIEC 60601-1:1988+A1 +A2
Sub clause(s):
8 C6 H' N7 F9 Y54
  P5 ^6 e' R; rSheet n°: 535
7 o' E+ {- j! i0 [! i, c" ?Subject:
Reduction of clearance and
; c; m6 ]5 [1 Mcreepage distances
Key words:
+ D4 d( `& d# w8 IClearance, creepage, reduction,
tracking resistance
Decision taken at the 40th
0 s8 F- b, t& ~meeting 2003
0 G: d' g" S' Z2 V- I3 w  \Question:
Is 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?
/ s7 D; d( X& A' |Decision:
, X4 c9 |1 K5 R' ^: WThis edition of the standard does not allow reduction in clearance and creepage distance.
Explanatory notes:
, g+ S- o( b  xThis problem will be transferred to SC62A/WG14 to make a recommendation to the 2nd edition do deal
  x" [9 N. y8 u1 N+ Q7 [! mwith this issue. The 3rd edition will address this issue.
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