[rescue] Big computer, single phase, three phase

[Robert Darlington]

On Fri, Feb 12, 2010 at 12:35 PM, Ethan O'Toole <ethan at 757tech.net> wrote:

<snip>


> I'll check. I'm going to permanantly install this toy I used to run at the
> old office:
>
> http://users.757.org/~ethan/pics/geek/unsort/IMG_1150.JPG<http://users.757.org/%7Eethan/pics/geek/unsort/IMG_1150.JPG>
>
> We had them built into the PDUs at NASA and I thought it was so cool I got
> one on eBay.
>
>
>  Consult the NEC.
>> Did I mention you should bond your supplies together?  Call me if you need
>> to.
>>
>
> What do you mean? Ground them all together on the computer? It's all one
> chassis, so there shouldn't be an issue here. Well 2 cabinets but they are
> physically bolted together.
>
> Thanks for the advice!
>
> <snip>


That's a sweet power monitor thing.

Bonding is electrically connecting one thing to another.  Basically once the
racks are bolted, go back with some wire braid and attach one to the other.
Grind or sand down the area where you'll bolt the braid so you have very
good electrical contact.  You can probably get away with bolting alone, but
I would go the extra step.  You see this done in cars where ham radios are
installed.  People bond the body panels and hood together and it cuts down
on noise even though everything is already bolted together.  It makes a
difference.

-Bob



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