i need to get 200amp/240 service from the utility easement 1000' away. the land owner dont want utility poles on land. i fgure i can run parallel with 480 with XFMR. thats one problem,the other is once i get it to XFMR now i gotta terminate these large wires inside...This is a crazy request but if that what the customer wants....... Any Ideas?
assuming you have 240 single phase at utility demarcation point, you could use a pair of single phase xfmr's
at 480 volts to bump it up and back down. 100 amps at 480 for 1,000' comes to 2.19% loss on 350 mcm AL,
so if you were to run direct burial cable in aluminum, you are looking at $1.65 / ft or about $3,500.
you'll also need a ground. #6 aluminum is what is needed for a 100 amp circuit, but the long length may
reuqire upsizing that. time to ask an engineer on this one. i've seen engineers specify a ground larger than
the feeders.
so you are in prolly about $6k, not counting labor and trenching, and profit. if you are running conduit, i'd
not go smaller than 3" for that length of run... and i'd blow air thru it pretty often, and make sure to keep
crud out of the pipe. all you need is a 1k run you can't blow string thru.... :rant: