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#191846 - 01/16/10 12:53 AM Wiring for office cubicles  
SJT  Offline
Member
Joined: Jul 2002
Posts: 241
PATCHOGUE, N.Y.
Is there a rule of thumb for the amount of circuits to be ran in an office setting with approx. 10 cubicles. Each would have a computer, monitor, and printer. I'm going to figure 1 amp for a single computer, and 1 amp for a single monitor. Are the desktop printers in the range of 2 amps? The computers, I would think should be figured with continuous duty, 125% added in. Thanks


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#191849 - 01/16/10 02:06 AM Re: Wiring for office cubicles [Re: SJT]  
noderaser  Offline
Member
Joined: Mar 2007
Posts: 404
Portland, Oregon, United State...
CRT or LCD monitor? Inkjet or laser printer? Computers can vary a lot, depending on how much kludge is in the box... A standard computer is probably around 100W or less, but professional workstations with multiple processors and hard drives can be more.


#191850 - 01/16/10 02:34 AM Re: Wiring for office cubicles [Re: SJT]  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,878
NY, USA
One thing I'd ask is if the people will be allowed to have portable heaters. Some people can't live without them. There might be a copy machine that will need its own circuit too.

Bill


#191856 - 01/16/10 03:12 PM Re: Wiring for office cubicles [Re: Bill Addiss]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,863
Brick, NJ USA
First & foremost IMHO, the following info should be available to the EC. Are cubicles 'new' or 'pre-owned'; equipped with factory' wiring harnesses? Or is the EC doing it from scratch?

Factory units must be wired to mfg instructions.

Otherwise, if it's a 'scratch' job, & the budget range of the job, 5 amps per ststion, 3 stations per 20 amp (derated); 4x20amp circuits would be my minimum.
Now...electric heat? 1 circuit each station! Toaster ovens? Don't laugh, I've been there!



John

#191857 - 01/16/10 03:16 PM Re: Wiring for office cubicles [Re: Bill Addiss]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,115
Estero,Fl,usa
I think you better bump that 100w up a bit. The PC that I am typing on now is pulling a tad over 180w just sitting here and when the CPU really cranks up (IE editing a video file) it goes over 200. That is a 2.8gz single core computer, 15" LCD monitor, a switch and a router. Ink Jet printer idle.
Just for Gee whiz info the Kilawatt device says I used 459 KWH in 2516 hours.

That translates to at least 2 amps

If they are going to have a laser printer, add 10 amps.

What is the wiring method? If they have an under the floor raceway/duct system you have a chance to upgrade. Nobody ever got in long term trouble putting too much power into an office but sometimes it takes a few years to prove them right. Going for the minimum usually bites you in the butt fairly soon.


Greg Fretwell

#191859 - 01/16/10 03:47 PM Re: Wiring for office cubicles [Re: HotLine1]  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,878
NY, USA
Originally Posted by HotLine1
Now...electric heat? 1 circuit each station! Toaster ovens? Don't laugh, I've been there!
Don't forget Coffee maker(s)

smile
Bill


#191861 - 01/16/10 04:14 PM Re: Wiring for office cubicles [Re: Bill Addiss]  
renosteinke  Offline
Cat Servant
Member
Joined: Jan 2005
Posts: 5,316
Blue Collar Country
The last pre-fab cubicles were arranged with three 20-amp circuits shared over five cubicles, if that's any help.


#191871 - 01/17/10 01:07 AM Re: Wiring for office cubicles [Re: renosteinke]  
SJT  Offline
Member
Joined: Jul 2002
Posts: 241
PATCHOGUE, N.Y.
The cubicles were pre-wired with factory assemblies. They may be the 8 pin type. It was set up with 2 circuits, and they want a third circuit. Looks like the in house Electricians will have to open the existing outlets to find where the circuits originate from.
Good Weekend


#191873 - 01/17/10 02:18 AM Re: Wiring for office cubicles [Re: SJT]  
sparkyinak  Offline
Member
Joined: Jul 2007
Posts: 1,327
Alaska
Rule of thumb for general open office is 4 cubicals. If you suspect extra electrical loads like coffee makers, boot dryers and such, 3 per circuit.

Last edited by sparkyinak; 01/17/10 02:18 AM.

"Live Awesome!" - Kevin Carosa

#191874 - 01/17/10 02:56 AM Re: Wiring for office cubicles [Re: gfretwell]  
noderaser  Offline
Member
Joined: Mar 2007
Posts: 404
Portland, Oregon, United State...
Originally Posted by gfretwell
I think you better bump that 100w up a bit. The PC that I am typing on now is pulling a tad over 180w just sitting here and when the CPU really cranks up (IE editing a video file) it goes over 200. That is a 2.8gz single core computer, 15" LCD monitor, a switch and a router.


Ok, let's say 200W... My two computers (one Mac Mini and one AthlonX2) and CRT draw 320W. Figure 60W on the CRT, 40-60W for the Mini and 200-220W on the Athlon. Could do more comprehensive tests, but that would require a shutdown.

Last edited by noderaser; 01/17/10 03:01 AM.

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