At 06:19 PM 8/22/00 -0700, you wrote:
>120 >> 12 volt transformers for PC devices such as hubs, speakers and
>modems never have polarized plugs.
>However I have always made sure that the transformers are plugged in at the
>correct direction relative to the printing on the device so as to put the
>hot lead on the right. This is not always easy to arrange without loosing
>some outlets on a surge protector or UPS.
>
>Because the transformers never have polarized plugs I am not sure that this
>is in fact necessary ?
>Is this a good idea or does it matter ?
Not a EE here, but a CET. Maybe half as many Es will do?
Not necessary unless the transformer is not isolated (Neutral of the
primary winding connected to one lead of the secondary). I can't think of
any reason not to isolate the secondary.
So, I would suppose it doesn't matter.
J. Paul Jones
[log in to unmask]
Visit our website regularly for FAQs,
articles, how-to's, tech tips and much more
http://nospin.com - http://nospin.org