MPC-6000 / MPC-7000 / RND-2 INSTALLATION, OPERATION AND MAINTENANCE MANUAL
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APPENDIX-A: REFERENCE DATA
This appendix provides reference for the following topics:
•
Wire selection guides
•
Battery size calculations
WIRE SELECTION GUIDES
Resistance of Solid Copper Wire
AWG
Ohms per Thousand Feet*
18 8.08
16 5.08
14 3.19
12 2.01
*NEC Chapter 9, Table 8.
Notification Appliance Circuit Wire Selection Guide
The following chart is based on the following premises:
•
V=IR
•
The entire load is at the end of the wire run (worst case).
•
Resistance is of solid copper wire.
Contact your local distributor or the factory if further information is needed in your
circumstances.
Maximum Wire Loop Distance (Feet)
Signal Load (A)
18 AWG
16 AWG
14 AWG
12 AWG
0.10
1237
1968
3134
4975
0.25
495
787
1253
1990
0.50
247
393 626 995
0.75
165
262 417 663
1.00
123
196 313 497
1.25
99
157
250
398
1.50
82
131
208
331
