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

Topic Options
Rate This Topic
#201864 - 06/28/11 07:37 PM Utility construction
wire_twister Offline
Member
Registered: 07/25/07
Posts: 265
Loc: Georgia USA
Alright you utility guys, I have a question just for my own curiosity: Why on some utility lines is the neutral on the bottom of the stack, and others, high voltages I assume, the neutral is on the top? Just a curiosity, as I dont do any utility work but it cant hurt to know how things work.
_________________________
Jimmy

Life is tough, Life is tougher when you are stupid
Top
Work Gear for Electricians and the Trades
#201866 - 06/28/11 09:13 PM Re: Utility construction [Re: wire_twister]
Niko Offline
Member
Registered: 08/17/06
Posts: 356
Loc: Campbell, CA
That is not the Neutral. the Neutral is at the transformer on the low voltage side. 120/208 or 120/240.

i believe that wire is for lighting purposes and is to interconnect the towers together.

probably someone with more experience will concur or set me straight. smile
_________________________
Be kind to your neighbor, he knows where you live

Top
#201877 - 06/29/11 06:11 AM Re: Utility construction [Re: wire_twister]
Yoopersup Offline
Member
Registered: 03/04/03
Posts: 822
Loc: Michigan
If you have 13800/7200 on a system you have a Neutral.
Top
#201879 - 06/29/11 06:58 AM Re: Utility construction [Re: Yoopersup]
Niko Offline
Member
Registered: 08/17/06
Posts: 356
Loc: Campbell, CA
Originally Posted By Yoopersup
If you have 13800/7200 on a system you have a Neutral.

see i told you someone will set me straight. I am glad i learned something.

i didn't know that. i always thought that neutral is strictly for the low voltage only.
_________________________
Be kind to your neighbor, he knows where you live

Top
#201886 - 06/29/11 05:27 PM Re: Utility construction [Re: wire_twister]
gfretwell Online   content


Member
Registered: 07/20/04
Posts: 9039
Loc: Estero,Fl,usa
I suppose it gets down to whether you have Delta or wye distribution. Wye by definition has a neutral. Now is the difference also defining whether the grounded/grounding conductor is on top?

The 13kv wye in front of my house has the ground on the bottom, the 250kv line behind my house has the ground on top (that is presumably delta)

That might only be anecdotal tho. One is neighborhood distribution (with cable TV and 120/240 on the pole) and one serves the next town. Maybe it is just down low for safety or convenience to tap off the pole pigs.
_________________________
Greg Fretwell
Top

Member Spotlight
Member Since: 05/03/03
Posts: 1137
New in the Gallery:
SE cable question
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box


Who's Online
1 registered (HotLine1), 81 Guests and 8 Spiders online.
Key: Admin, Global Mod, Mod
 
New in the Gallery:
SE cable question
 
Top Posters (30 Days)
Admin 47
HotLine1 43
gfretwell 19
Ruben Rocha 12
Trumpy 9
 
Newest Members
KrmtFrg, Stack, Scotto, Freecrowder, clee512

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