Questions on outdoors feeder circuit

[modernhistorian]

I am helping our HOA to design and build towers to bring wireless into out mountain community, and I have some questions regarding bringing power to the tower. Our intent is to set a meter with main disconnect at the nearest pole or pad transformer (working with local utility on that) and then run a feeder circuit to a sub-panel (ground/neutral not bonded) at the tower. The ISP would connect there. It is rocky and steep terrain, so we wish to set poles and run the feeder cable overhead (no road, so ten feet clearance from the ground should be good). The max distance meter to sub-panel is under 300 feet, and we want to provide for 60-amp load (either three 20-amp or four 15-amp branch circuits).

An online calculator showed that either #2 copper or (more likely) 2/0 aluminum should keep this load below three percent voltage drop. First question: anyone get a different size for that? Second question is what type of cable to use? NEC 2014 article 225 states UF is acceptable but says nothing about SER. An SER 2/0-3 would be most economical, if it is acceptable for that use.

Final question has to do with the poles. Where could I find information on type, sizing, and location of proper poles. I am thinking galvanized pipe, set at fifty or one hundred foot intervals in concrete, but have no idea where to get help on this.

Thanks for any advice.
Buck

 

[jumper]

I am closing this thread, in accordance with the Forum rules. This Forum is intended to assist professional electricians, inspectors, engineers, and other members of the electrical industry in the performance of their job-related tasks. However, if you are not an electrician or an electrical contractor, then we are not permitted to help you perform your own electrical installation work.


If I have misjudged the situation, if for example this project is related to your work, then send me a Private Message. If you can show me that I am wrong, and that you are a licensed electrician (or at least a licensed apprentice), then I will reopen your post, and offer an apology for the delay and inconvenience.