18
Cable Size Square mm Resistance in Ohms per 1000
Metres
0.2 95.30
0.5 36.20
0.75 24.13
1.0 18.10
1.5 12.10
EXAMPLE
A water tank is located 2000 metres from the E30. Two separate wires
each 0.2mm^2 are run to the remote tank (total wire length is 4000 metres).
The resistance as measured across the 2 wires back at the E30 (with the
tank level switch closed) is 382 Ohms. This is well under the 5,000 Ohm
limit. The remote input to the E30 will operate properly provided the wires
are separated by suffi cient distance that the capacitance between them is
less than 25nF. Capacitance should be measured between the wires when
the remote switch is open and it must be less than 25nF.
Note: Use table as a guide only, cable resistance may vary depending on
the wire standard and construction.
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