Hi John:
> The symbol I mentioned in my original question looks similar to the 5173
> but it is not identical (see below).
>
> |
> |
> -----
>
> My question is: can this symbol be used for marking of a terminal to which
> return (0V) wires of redundant DC POWER sources are connected? If not, what
> symbol would you use? 0V?
My recollection is that, many years ago, HP
invented this mark for their Test and
Measurement equipment because they had no
space for the "rakes" below the horizontal
line:
|
|
-----
/ / /
The meaning was the same: the terminal is
connected to the chassis and accessible
metal parts.
HP did attempt to get the symbol into the
international symbol standard, IEC 479. And,
according to Doug Powell's message, I guess
they were successful.
(I was not with HP at the time, although I
was well-acquainted with their safety folks,
and we worked together on safety standards
committees.)
Best regards,
Rich
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