The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!


2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
Parking lot pole light swap....
by ghost307
Today at 04:10 PM
International Wire Colour Codes
by Tjia1981
Today at 12:08 PM
Son of Sparky
by HotLine1
10/20/16 07:43 PM
Speaking of Plugmold ...
by gfretwell
10/17/16 02:37 PM
Broken battery charger? Check for cobwebs!
by gfretwell
10/17/16 02:30 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 12
HotLine1 7
ghost307 6
renosteinke 6
Potseal 4
Who's Online
1 registered (HotLine1), 162 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#45494 - 11/30/04 03:34 PM MDP for Sub Division
mustangelectric Offline

Registered: 02/08/04
Posts: 496
Loc: Bentonville, AR
I am setting up a design for a all electric subdivision where the owner is paying all the utilities and installing his own water treatment facility. There is also permanent site lighting that will be installed (Stainless Light Poles) throughout the subdivision.

Each residence will have a 100A main breaker in a NEMA 3R panel mounted on the exterior wall and there are 220 residences in the subdivision.

Wouldn't this be best acheived with primary metering, switchboard, and pad mounted transformers that will be located throughout the subdivision to feed the residences and the area lighting.

What is the best setup for this type of installation? A primary metered MDP with 480 VAC feeders to the transformers and service laterals from the pedastals to the residence?

I was thinking a Switchboard with high voltage breakers feeding the transformers?

What is the most common type of installation for this type of setup?

I would apprecite any suggestions.

Thanks for any replies.


Electricity has no respect for ignorance!

Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#45495 - 11/30/04 05:24 PM Re: MDP for Sub Division
scameron81 Offline

Registered: 02/24/04
Posts: 80
Loc: Healdsburg, ca, USA
I have only seen a setup like your talking about once before. It wasn't a subdivision but a large resort. The Poco metered the 12KV and then set a 12kv/4160 transformer which was then distrubuted to the different areas where they placed transformers for each building.

IMHO based on the size of the subdivision It seems like 480VAC distribution wouldn't quite be enough to power the subdivision without worrying about voltage drop issues or some pretty good sized feeders.

I hope I have been at least a little help


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals