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)
241,443 Are you busy
177,420 Re: Forum
169,010 Need opinion
Who's Online Now
0 registered members (), 10 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#116541 - 04/08/04 08:06 AM Roof Service  
electure  Offline


Member
Joined: Dec 2000
Posts: 4,262
Fullerton, CA USA
Does this seem a little abnormal to you?


[Linked Image]


The HV lines come from the pole to a bracket with insulators mounted on the parapet of this building. Transformer is on the roof.

The secondaries come out the other side of the building (at far left). You can see 2 service risers, one in PVC conduit, the other in white SCH40 PVC water pipe.


Tools for Electricians:

#116542 - 04/08/04 09:29 AM Re: Roof Service  
Electricmanscott  Offline
Member
Joined: Jan 2002
Posts: 1,457
Holden, MA USA
Depends what country this is in.


#116543 - 04/08/04 12:37 PM Re: Roof Service  
Lostazhell  Offline
Member
Joined: Feb 2004
Posts: 1,431
Bakersfield, CA (Originally Or...
Judging from the colors of the buildings & the "rojo" on the ad at the top of the building. I'd say this is someplace south of the US border... (Mexico, Central or South America) From what I've seen down there... ANYTHING goes!

-Randy


#116544 - 04/08/04 06:08 PM Re: Roof Service  
electure  Offline


Member
Joined: Dec 2000
Posts: 4,262
Fullerton, CA USA
No secret, it's in Mexico.
So, disregarding the plumbing pipe for a mast, does anyone ever see an overhead service to a building done like this?
I'm serious. I put up what I thought was an example of a strange way to do an underground service on another thread and found that it's just the way Easterners do them (and so do the utilities in Mexico)...S


#116545 - 04/08/04 06:58 PM Re: Roof Service  
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
I’m guessing ~35kV, but that seems a bit unusual for a liquor store. In the US, a unit substation on a roof would more typically be found on an industrial occupancy.
[Linked Image]


#116546 - 04/08/04 10:47 PM Re: Roof Service  
Scott35  Offline

Broom Pusher and
Member
Joined: Oct 2000
Posts: 2,708
Anaheim, CA. USA
I did an EE set for a Bank T.I. in Westchester (1 mile from LAX Airport), and the original building (shell) was to have a setup similar to this - which was to be performed during a previously done remodel and addition to the entire building.

These plans were dated 1976, and the pages I am referring to were designed per LADWP Design Engineer's requests.

Was to have a Delta - Delta 750 KVA Transformer on the Roof, fed from overhead 13,200 VAC Primary Feeders to a dead-end rack.

I guess they scrapped these plans, and put everything underground instead.

It was a real eye catcher! Had to look three times at the Plan Page to make sure it was showing this!

All the Buildings in this area have the same model# GTE / Sylvania Gear (Main Breaker in the Pull Section, 800 amp rated multi meter sections, Federal Circuit Breakers, 1Ø 3 Wire).
Roof mounted HVAC equipment carries the wild phase and ends the grounded conductor at the service equipment - also located on roof / 2nd floor.

Scott


Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!


Member Spotlight
CDS
CDS
Nicholson Ga
Posts: 34
Joined: June 2006
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: 0.012s Queries: 14 (0.002s) Memory: 0.7775 MB (Peak: 0.9209 MB) Zlib enabled. Server Time: 2017-10-22 09:52:36 UTC