On Thu, 25 Aug 2005 10:13:08 +0100, Cordless Crazy
wrote:

3. What size of cable would be required on this 55m run with, what I
assume will be, a huge voltage drop?

Voltage drop is given by V=IR where I is the current in amps and R is
the resistance of the wires in ohms. The resistance of the wires is
found from the resistivity of copper - 1.68*10^-8 ohm metres: R =
(length in metres * resitivity) / cross-sectional area of the wire in
square metres.

Mr F.