ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
220/230/240V 60Hz Systems
by gfretwell. 09/16/18 12:37 PM
Acronis Backup 2017
by gfretwell. 09/16/18 12:46 AM
Inspection camera help
by Bill Addiss. 09/15/18 11:32 AM
Tingle off the water spigot
by Trumpy. 09/15/18 03:24 AM
Lighting Load questions
by HotLine1. 09/14/18 07:04 PM
New in the Gallery:
Plug terminals
Housebilding DIY wiring
Who's Online Now
0 registered members (), 32 guests, and 23 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Large residential service question #184783
02/21/09 02:45 PM
02/21/09 02:45 PM
T
Trick440  Offline OP
Member
Joined: Aug 2005
Posts: 248
Waterford, MI, USA
I have a 5000sq ft. existing home. 2 - 200a panels fed off a 320a meter can.

They are doing a 4500sq. ft. addition. That will include an indoor pool, geo thermal, basketball court, laundry rm, kitchen, bath, bar & pool table rm, storage, lots of outside flood lights.

They would like 2 panels in this addition. One for the pool and Geo, and one for the rest of the addition. (I may tell them just one panel cause the run is over 200', times that by 2 and thats a hell of a run.)

So the question is what do you think is the best option to do this service? CT cabinet?



Shake n Bake
2017 / 2014 NEC & Related Books and Study Guides
Re: Large residential service question [Re: Trick440] #184786
02/21/09 04:57 PM
02/21/09 04:57 PM
F
frenchelectrican  Offline
Member
Joined: Feb 2003
Posts: 939
Wi/ Paris France { France for ...
4500 sqft addtion that is pretty good size there.

Did you do the load calucations yet so far ?

I am not suprise you will end up using 600 or 800 amp service there but check with your POCO for upperlimit for single phase service otherwise end up getting triphase service installed.

The last mega sized house I did work on it was a shy over 12K sqft that place end up having 800 amp 3 208Y120 service installed in there { I could go with single phase however the three phase line is there so might well use it anyway }

I am pretty sure you will end up useing the CT metering set up.

Merci,Marc


Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)

Re: Large residential service question [Re: frenchelectrican] #184795
02/21/09 10:57 PM
02/21/09 10:57 PM
G
George Little  Offline
Member
Joined: Jan 2004
Posts: 1,489
Michigan USA
Well, first of all you need to do a load calculation on the residence and then add to the existing load, the proposed load.

You currently have an underground service feeding a 400a. meter can and will be adding a geothermal system. The geothermal will require a separate meter and will probably require a new lateral from DTE.

My suggestion is to call DTE and work with them as to whether or not they will need to increase the size of the lateral. They will need load calculations.

As for running two panels to the addition, I don't think that will be necessary but you will probably need to run circuits to the heating equipment for the pumps and the backup resistance heating.


George Little
Re: Large residential service question [Re: George Little] #184796
02/22/09 12:39 AM
02/22/09 12:39 AM
T
Trick440  Offline OP
Member
Joined: Aug 2005
Posts: 248
Waterford, MI, USA
Load calc, and contact DTE. And then from that point it looks like a CT setup. Thanks.

George why will the Geo require a separate meter? This will be my third Geo and all have been on homes with a single meter.


Shake n Bake
Re: Large residential service question [Re: Trick440] #184798
02/22/09 12:49 AM
02/22/09 12:49 AM
G
George Little  Offline
Member
Joined: Jan 2004
Posts: 1,489
Michigan USA
All the Geothermal systems I've inspected (about 10) have separate meters so they can get a reduced rate on their electric bills.

Be prepared to hear from DTE that they will need to change the lateral once you go to a CT cabinet.


George Little
Re: Large residential service question [Re: George Little] #184799
02/22/09 01:25 AM
02/22/09 01:25 AM
T
Trick440  Offline OP
Member
Joined: Aug 2005
Posts: 248
Waterford, MI, USA
Thanks George.


Shake n Bake
Re: Large residential service question [Re: Trick440] #184975
02/26/09 11:34 PM
02/26/09 11:34 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,287
Estero,Fl,usa
The funny thing about all of this is the utility will probably put this whole thing on a 25KVA transformer ... shared by the neighbor.


Greg Fretwell

Featured:

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

 

Member Spotlight
Admin
Admin
NY, USA
Posts: 3,516
Joined: October 2000
Show All Member Profiles 
Top Posters(30 Days)
Admin 13
Trumpy 11
sparky 10
Popular Topics(Views)
249,289 Are you busy
187,226 Re: Forum
176,586 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.019s Queries: 15 (0.004s) Memory: 0.9862 MB (Peak: 1.1420 MB) Zlib enabled. Server Time: 2018-09-19 20:38:18 UTC