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From: "Michael A. Terrell"
Subject: Re: OT: In floor power recepticles
Date: Mon, 28 Oct 2002 05:59:59 -0500
Organization: Do I have to? Well, Ok. If you insist!
X-Mailer: Mozilla 4.61 [en]C-CCK-MCD (Win95; U)
> >Come on guys! This *must* be a troll. I'm no electrician (EE
> >type), but who on the good planet Earth would hire someone to
> >design an OR without *specific* knowledge of the requirements.
> >The fact that the OP is looking for a floor mounted receptacle
> >for an OR (add to the insult that he's searching for one and
> >cannot find it) here in the NewsGroups, certainly means
> >*something*. ...and not something good. Sheesh!
> > Keith
> I am the OP. Please re-read your reply and tell me what value it has. Please
> ask yourself...what is worse. A troll asking a stupid question intended to
> generate multiple worthless responses and thereby clogging up the net, or a guy
> like you who responds to alot of questions with no clue as to a solution saying
> a generic "I don't know how it can be done so the guy asking the question must
> be an idiot".
> I would venture a guess that guys like you contribute more dead wood to the net
> than trolls. Just my opinion.
I have avoided this thread till now. I been forced to use floor
outlets for microphones in several auditoriums. The seal on the
threaded cover works great! If it is tightened properly. If the O-ring
isn't damaged. If the cover doesn't get lost. If someone doesn't
damage the threads. In other words, they stink. The replacement covers
cost me $60 each because you had to buy the complete package each time.
They only lasted a year before the connectors and wiring were so damaged
that they were useless. Some know nothing architect decided it would
look better to have them in the floor than along the front of the stage,
and across the back and side walls. Most were abandoned and new outlets
were installed with surface mounted conduit and new boxes where they
belonged after a couple very expensive repairs. They are a last resort
anywhere liquids are used, and if the floors are cleaned with a floor
scrubber / buffer, it will pump liquids into closed outlets. Check the
National Electrical Code, and with the hospital's insurance company
before you go any further. Anything that can cause a spark in the OR
can cause an explosion. the oxygen, and other gasses can be fatal when
An old guy I worked for years ago serviced master clock systems. He
had to carry special filler plates with seals to cover the hole if he
had to remove a clock for repair in an OR. He had to make sure the
wiring was properly protected to prevent a spark, and was liable if
anything went wrong.
The liability is so high that I doubt anyone would sell you the floor
outlets if they knew you intended to install them in such a hazardous
location. The wiring should have explosion proof seals at every place
where conduit connects to a box, and at the other end, if it leaves the
OR. Think of industrial wiring for a mine, or the petroleum / natural
gas / propane / welding gas filling station. It is all critical, and
people die if it isn't done right.
Have you ever looked at the low leakage plugs used in a hospital? A
couple drops of anything conductive, and that isolation is gone. Then
the electric is shut down during the operation with the patient on the
table while they need it most. Use your head. It is dangerous and
Michael A. Terrell
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