Hi John
After resistor you might have ES1 circuit and safety distances do not apply.
However resistor need to comply with special requirements of Annex G.
See table 4 for ES1 limit for DC current. I think it is 2mA. You have to
simulate short accross resistor unles resistor comply with searate
Brian, for a rigorous determination of creepage and of clearance you need to
also determine and assign:
1. Over-voltage Category ( affects Clearance )
2. Pollution Degree ( micro-environment affecting Creepage )
3. Basic (simple separation) or Reinforced (protective separation)
It isn't clear to me whether the requirements of 5.4.2 and 5.4.3
(Edition 4) apply if the product remains safe with relevant clearances
and creepages short-circuited (one at a time). The specific case is at a
point fed by a 1 kV DC source behind two 4.7 megohm resistors in series.
Please
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