Richard Nute writes

>Juan Pena wonders why we have multiple standards (i.e. IEC 65, 
>IEC 950, and IEC 1010) when the products are very similar in
>construction.
>
>I would go further and include IEC 601 in the list.
>
>Let's look at the big picture, the construction of products
>for safety.....
>
>

I disagree with Richard's statement that IEC 601 can be included in the
list, mainly because the concept of SELV is not applicable for medical
equipment. Hazardous or even fatal leakage currents can be caused by very
low voltages when in contact with the body, particularly with internal body
parts, e.g. via endoscopes, intracardiac probes, etc.

The isolation concepts used in IEC 950, IEC 1010 and IEC 65 are sufficiently
different from those required for medical equipment to make a unified
standard not feasible in this case.

Jon Griver
ITL (Product Testing) Ltd.
[email protected]

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