My personal choice would be to run the cable down inside the tower to ground
level and then run the cable either over the ground or preferably in a pvc
conduit just below the surface.
I always feel that this is a safer way for both lightning protection,
eliminating unbalanced wind loading on the tower and aesthetics.
However if you do run the cable in the air, it definitely needs a steel
catenary over that sort of distance.
Make sure you test out the rotator with the full length of cable in circuit
and if possible, provide a rotational torque load on the rotator about the
same as the 402CD will provide in a 50 mph wind.
That's when you will find out the current/voltage limitations of the
You can simulate that sort of load by clamping the rotator in a vice and use
a torque arm with a known weight attached to produce the load required.
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