This is the best place to ask this question
that I can find.

When do which standards take effect or are necessary?

UL / IPC / IEEE / ANSI etc. (oh ya, and IPC)

What governs or determines when a standard is necessary or

required?

Chris Robertson
[log in to unmask]

 








>
> This is copied from the title page.
>
> IEEE Std 315-1975 (Reaffirmed 1993)
> ANSI Y32.2-1975 (Reaffirmed 1989)
> CSA Z99-1975
>
> All are the same document, and still I see more variations and made-up
> reference designators. I guess the people who need to read it
> do not have a
> copy. What works, works.
>
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