On Apr 24, 10:44*am, George wrote:
RickH wrote:
On Apr 24, 6:46 am, wrote:
On Apr 23, 10:44 pm, "Ed Pawlowski" wrote:

"RickH" wrote in message
....
I need to put a centralized UPS in my business office. *Do I need to
get into an expensive 3 phase unit? *Or will the elecrical code allow
me to distribute the outlets from a less expensive 115v consumer UPS,
through existing conduit, (to orange outlets), to 3 separate offices?
The number of computers I need to protect can easily be handled by a
larger consumer unit. *However my question is on the code legality of
distributing the UPS outlets back out to the 3 offices. *I can esily
pull dedicated wires through the conduit. *I would keep the UPS unit
in the electrical room by the mains.
There are probably ways to do it, but it may be cheaper to buy separate UPS
units. *Even a $100 unit can save the day.
It would seem to me that "less expensive consumer unit" and wiring an
appropriate size unit for 3 offices are mutually exclusive. * Why not
just use a seperate consumer UPS in each office ? * * *Aside from the
cost, the consumer units come with outlets built-in. * How are you
going to then wire that in for distribution?

Another note, whatever you get, you surely don't need 3 phase, unless
you have 3 phase eqpt in those offices.- Hide quoted text -

- Show quoted text -

I meant 3 phase on the primary side of the UPS unit where the output
of the unit is a single phase inverter to 115v.

For hookup I was thinking of making extension cords out of 3/8 BX
cable and steel plugs. *Those would go to a pull box. *From the pull
box I would go into the subpanel just to pass-thru into the conduits.
UPS would be secured to the wall.

It is a commercial office condo unit with 3 phase main, but I have a
single phase subpanel for these offices (signage, parking lot, AC,
heat, etc is common and 3 phase). *All the conduit from the subpanel
is 3/4 so there is plenty of room. *I just dont know if it's ok to
distribute from a plug-type UPS unit, or if I have to look for a wire-
in unit (which I've had a hard time finding).

Direct connect UL approved for purpose units are commonly available but
not in big box. You get them where you get any other commercial quality
stuff.- Hide quoted text -

- Show quoted text -


Yes, but I'd still have the issue of combining the electrical systems
unless I use a dedicated raceway. I think just getting a larger APC
or Triplite consumer unit and distributing with wiremold is the best
fit for this cost-wise. About 5000VA is all I need mostly to keep the
network LAN and servers up for a half hour or so, the desktops are
shut off at night. The unit I'm looking at has a built in web server
to check on its status remotely too. I'm not building a whole data
center but like the idea of being able to lock up the UPS centrally.
All the small data-center wire in units I've seen start above $5,000.