III- 31
WIRE SELECTION GUIDES
INITIATING CIRCUIT WIRE SELECTION GUIDE
Each initiating circuit loop must not have a resistance greater than 100 ohms. The following chart is based on
the resistance of solid copper wire.
MAXIMUM WIRE LOOP DISTANCE (ft.)
RESISTANCE OF
SOLID COPPER WIRE
SIGNAL CIRCUIT WIRE SELECTION GUIDE
Each signal circuit loop must not have a voltage drop greater than 1 volt. The following chart is based on the
following premises: 1) All of the load is at the end of the wire run (worst case), 2) resistance is of solid copper
wire. Contact your local distributor or the factory, if further information is needed for your requirements.
MAXIMUM WIRE LOOP DISTANCE (ft.)
Signal
Load (A.)
* NOTE: Spade terminals of the appropriate size must be used for wire sizes larger than 14 AWG.
18 AWG 16 AWG 14 AWG *12 AWG *10 AWG
0.50 307 487 769 1250 2000
1.00 153 243 384 625 1000
2.00 101 160 253 412 666
2.00 76 121 192 312 500
3.00 61 97 153 250 400
22 AWG 20 AWG 18 AWG 16 AWG 14 AWG
6,172 9,803 15,625 24,390 38461
AWG
OHMS PER
THOUSAND FEET
22 16.2
20 10.2
18 6.4
16 4.1
14 2.6
12 1.6
10 1
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