Ted,
I wonder if the load center panel is mounted on an exterior wall? If
so running a penetration from the panel to outside might be
better. Then you could route it in conduit or exterior cable routed
along exterior to a good spot to bring it back inside at the lower
level. That still might require running cable along interior wall surface.
I ran about 35-foot of 8-4 cable from my 200A service panel in our
utility hall by running it thru pvc conduit thru the floor to our
4-foot high crawl space. Then looped across the underside of floor
joists to another floor penetration in the ham shack where I
installed a 80A panel. I installed one 240v 20A breaker for my QRO
amplifier PS and added two 120v 20A duplex boxes which run my 50A
Astron 12v station supply and a MOT 24v 100w repeater PS for 24v
stuff. 240vac was run thru conduit to 4-inch box with 20A twist-lock
receptacle for the amp cord to plug into.
Now I am converting to 50v LDMOS amps and need to provide them
240vac. Two will be kilowatt amps and another 600w. Each to be
installed at the base of a different tower so will have 120-foot,
100-foot, and 70-foot 240vac cable runs outside. All get to run
inside 2-inch conduit and will have load centers at the amplifier
end. Two will route from the hamshack 240v panel. Third has not been
determined (might be second 240v line direct from the house main panel).
I am designing remote control panels for each amplifier to control
and monitor parameters. All are no-tune single band amps so that is
much simpler than a KPA500 or KPA1500.
But my circumstance is much easier with open crawl space and simple
R-19 fiberglass insulated wooden walls; quick work with a hole
saw. Working one summer in college as electrical apprentice doesn't
hurt knowing what to do. My dad's barn got wired after that summer (for free).
73, Ed - KL7UW
http://www.kl7uw.com
Dubus-NA Business mail:
[email protected]
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