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Utility construction #201864 06/28/11 09:37 PM
Joined: Jul 2007
Posts: 265
W
wire_twister Offline OP
Member
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

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Re: Utility construction [Re: wire_twister] #201866 06/28/11 11:13 PM
Joined: Aug 2006
Posts: 356
Niko Offline
Member
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

Re: Utility construction [Re: wire_twister] #201877 06/29/11 08:11 AM
Joined: Mar 2003
Posts: 849
Y
Yoopersup Offline
Member
If you have 13800/7200 on a system you have a Neutral.

Re: Utility construction [Re: Yoopersup] #201879 06/29/11 08:58 AM
Joined: Aug 2006
Posts: 356
Niko Offline
Member
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

Re: Utility construction [Re: wire_twister] #201886 06/29/11 07:27 PM
Joined: Jul 2004
Posts: 9,547
G
gfretwell Offline
Member
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

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