Dear Group,

Medical devices frequently include an equipotential terminal. It is used to
ensure that all devices connected simultaneously to a patient are referenced
to the same earth potential, otherwise any differences can cause a current
through the patient.

Does anyone know the standard which specifies the mechanical structure of
this terminal, in particularly whether the yellow/green disc, which is
usually placed around the terminal, is a mandatory part of the
specification? A colleague claims that the yellow/green disc is not
necessary.

Please note that the answer is NOT is IEC 60601-1, which just specifies the
marking which is required adjacent to the terminal, but does not specify the
form of the terminal itself, or when it should be used.

Regards,

Jon Griver
http://www.601help.com
The Medical Device Designer's Guide to IEC 60601-1




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