Is it (in 60601-1)? Chapter and verse (or better still, a relevant quote), please!
Yes "equipment leakage" for Class II is included in 62353 ... it looks like (what we might call) "total equipment leakage" (1,2) to me. Easy enough to measure when there is a patient connection (like ECG leads connected together, for instance) ... but how do you pick up
any leakage current (3) otherwise?
Leakage current generally has two components:- resistive and capacitive. Time, then, to bring out the foil! Or (as I have mentioned before), the old ESU return plate for the kit to sit on. What harm can it do (and how long does it take)? Just record "zero µA" if that's what you see (4).
As an aside, I believe that the general term "leakage current" is a bit of a poor choice. This current inherently finds its way from the live parts of
any mains powered equipment to accessible metal casing or parts. In Class I equipment (that is, kit with a protective earth conductor), this "leakage current" flows harmlessly to earth.
So, one wonders, where does any similar current "leak" to in Class II equipment?
1) What Old-Timers might recognise as Patient Leakage and Enclosure Leakage combined.
2) The Rigel booklet mentions "touch current" (which is fine by me) and gives the limit as 100 µA.
3) Assuming a non-conductive casing.
4) But I'll bet you'll always get something.
