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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