Corridor Width for 500kV transmission lines

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mitchparis

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Does the NEC specify the minimum right-of-way required for 500kV transmission lines? If so, I am looking for the minimum corridor witdh for double circuit (meaning two sets of towers running parallel to each other) 500kV transmission lines.
 
Re: Corridor Width for 500kV transmission lines

Transmission lines are outside the scope of the NEC. I will go a step further and say 500kV systems are way outside the scope of the NEC.

That said, there is no doubt someone here who can point you in the right direction.

I am guessing that design of UHV systems is a specialty within a specialty.
 
Re: Corridor Width for 500kV transmission lines

Transmission lines are outside the scope of the NEC. I will go a step further and say 500kV systems are way outside the scope of the NEC.
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Peter it would depend on who owns the lines.

Check out 90.2, tables 110.31 & 110.34. ;)

Edit Pete to Peter

[ January 23, 2005, 12:31 PM: Message edited by: iwire ]
 
Re: Corridor Width for 500kV transmission lines

True enough Bob, but I think we can safely assume that 500 kV lines are owned by some sort of utility/power coooperative under NESC guidelines.

BTW, Pete is fine. :)
 
Re: Corridor Width for 500kV transmission lines

Pete...you are right. The 500kV lines are owned and operated by Virginia Dominion Power. Do you know if there is a forum like this that discusses the NESC guidelines? Thanks again for your help...you too Bob :)
 
Re: Corridor Width for 500kV transmission lines

Originally posted by mitchparis:
Pete...you are right. The 500kV lines are owned and operated by Virginia Dominion Power. Do you know if there is a forum like this that discusses the NESC guidelines? Thanks again for your help...you too Bob :)
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I'm not aware of an NESC related forums.

I just read your other thread that was locked and I am guessing that if the utility is proposing adding transmissions lines, then public hearings will likely be held, if they haven't allready.

We have had a similar situation where I live in Connecticut. The local utility has proposed adding a 235 kV line across the state (not along existing transmission paths) and there has been much opposition to it for the same reason - easements.
The utility researched the cost of burying the lines but the cost is so astronomical that they are pushing to put them overhead. It's been an ongoing battle with the public but the lines are badly needed to keep up with demand in the ever-expanding southwestern part of the state.

[ January 23, 2005, 01:56 PM: Message edited by: peter d ]
 
Re: Corridor Width for 500kV transmission lines

Pete - Bob - Nick, Thanks very much for your help. The public hearing is ongoing. Our representitive has recommended re-conductoring since the existing conductors are over 30 years old. Using ACSS-TW conductors would increase the current carrying capacity by two to three times, thereby providing the growth for the future demand. Thanks again for your help.
 
Re: Corridor Width for 500kV transmission lines

Originally posted by mitchparis:
Pete - Bob - Nick, Thanks very much for your help. The public hearing is ongoing. Our representitive has recommended re-conductoring since the existing conductors are over 30 years old. Using ACSS-TW conductors would increase the current carrying capacity by two to three times, thereby providing the growth for the future demand. Thanks again for your help.
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"Concernec Resident "

Just who is your "representative" and what makes him qualified to decide such a thing?

I would not think the utility would want to just use conductors with a higher temp insulation and get more current in the process. All the rest of their equipment is probably not suitable for the added current, plus the I^2R losses might well become a serious problem from an economic sense.
 
Re: Corridor Width for 500kV transmission lines

I'm curious what your interest is in the this.
 
Re: Corridor Width for 500kV transmission lines

* This NEC? Forum is for those in the electrical and related industries.
Questions of a "How-To" nature by persons not involved in the electrical industry will be removed without notice.

I think it is time to stop this thread.
 
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