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. . . if there's more than one and they do not conform to each
other, is this not prima-facie demonstration that no such convention
exists?

Bob . . .

No, I don't think it is. ...

There is no convention
for mounting switches into the product, only a few standards
for orientation of the keyway for purposes of describing
functionality of any given switch.

...

This appears to be a duplicate thread, the above posting being a response to this original thread: http://forums.matronics.com/viewtopic.php?t=79809

The message above has been re-posted to the orig ...

Thanks Bob et al for the responses. I figured that would probably be the case -- the keyway up recommendation in the AEC being for some historical reasons and nothing more. Glad to have that confirm ...

Bob's reply somehow ended up in a separate duplicate thread, so I'm re-posting it here:

I would take "keyway conventions" with a grain of salt!
It's been about 15 years since I did m ...

This is a question for Bob Nuckolls as author of the AeroElectric Connection:

In the chapter on switches, it is stated that "for most applications, switches are mounted with bushing keyway ori ...