ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Recent Posts
VFD MotorFeeders
by gfretwell. 10/19/17 01:02 AM
Generator Cable Sizing
by brsele. 10/18/17 07:39 PM
What do you do?
by gfretwell. 10/17/17 01:08 AM
Good ol' copper pipe in the fuse holder trick
by HotLine1. 10/16/17 07:16 PM
Another generator question
by HotLine1. 10/16/17 07:02 PM
New in the Gallery:
Gallery Test
Popular Topics(Views)
241,439 Are you busy
177,418 Re: Forum
169,008 Need opinion
Who's Online Now
0 registered members (), 9 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#181746 - 10/28/08 01:54 PM Service size for spec office space  
cgw  Offline
Member
Joined: Jul 2004
Posts: 133
Rochester NY
I'm trying to estimate a service size for a samll office building. My estimate works out to 10W/SF. Previous projects are all around 10W/SF. It is for a 14,800 square foot building for which I have preliminary floor plans for a small part of it (two tenents). 12 W/SF sound right? There is an elevator which I will add on top (of the 12W/SF) along with other house loads like exterior lighting.


Work Gear for Electricians and the Trades

#181748 - 10/28/08 04:14 PM Re: Service size for spec office space [Re: cgw]  
wa2ise  Offline
Member
Joined: Nov 2002
Posts: 784
Oradell NJ USA
I imagine that much of that load will be computers and such with really bad power factors and drawing current with lots of harmonics. Which means you'd need individual neutrals or superneutrals to handle it.


#181749 - 10/28/08 05:08 PM Re: Service size for spec office space [Re: wa2ise]  
ghost307  Offline
Member
Joined: May 2005
Posts: 916
Chicago Illinois USA
Make sure that the HVAC loads aren't coming out of your 12 W/SF. They can eat up a lot of power quickly.


Ghost307

#181752 - 10/28/08 10:11 PM Re: Service size for spec office space [Re: ghost307]  
cgw  Offline
Member
Joined: Jul 2004
Posts: 133
Rochester NY
The HVAC is included.
By NEC lighting is 3.5W/SF and receptacles 1W/SF (off the top of my head). In practice receptacle loads are higher (at least 2W/SF). Lighting will be less than 2W/SF but (as far as I can tell) we need to use the 3.5.
Electric for HVAC is fairly predictable.



Member Spotlight
NickD
NickD
Amish Country, PA
Posts: 46
Joined: March 2013
Show All Member Profiles 
Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.011s Queries: 15 (0.002s) Memory: 0.7604 MB (Peak: 0.8932 MB) Zlib enabled. Server Time: 2017-10-22 04:45:03 UTC