In my situation the Nat gas and fies box are far apart. I'm installing the
generator near the nat gas and running wire to the fuese box where the
transfer switch will be.
Its a 15kW unit so large (#2 minimum) wire will be needed to carry the
single phase power to the transfer switch.
I'm having trouble finding this in a bundle. Will I have to run individual
wires in a conduit? The run is ~140 ft.
Where's a good source for electrical wire of this size?
Well 15K Watts = 62.5 Amps.
You should be able to use 4 guage NM/B Wire IMO. That will have your 2
hots, neutral, and ground wire in it. From my understanding, this wire
can handle 70 AMPS up to about 130 feet for 2% voltage drop or less.
It can handle 60 AMPS up to about 150 feet for 2% voltage drop or less.
That would tell me that it should be able to handle up to 65
AMPS(15.6kW) for 140 feet.
When I ran a subpanel in my garage, I used 4 guage NM/B wire. I could
not find this at your standard Home Depot / Lowes places. However, a
quick look on Yahoo Yellow Pages or in your phone book for electrical
suppliers, you can ask around and find it easy. It did hit my pocket
book good for about $2.20 / foot.
Depending on how accurate the 140' measurement is, you're also close to
500' for the three conductors (reduced size ground) so you may get a
better price buying a full spool. Still need to buy just 140' or so of
the smaller wire for the ground.
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