Siemens FC2005 - Appendix-A: Reference Data; Wire Selection Guides; Resistance of Solid Copper Wire; Addressable Device Circuit Wire Selection Guide

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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
Ohm per Thousand Feet*
18
8.08
16
5.08
14
3.19
12
2.01
*NEC Chapter 9, Table 8.
Addressable Device Circuit Wire Selection Guide
Each addressable device circuit must meet the following requirements:
Total loop resistance – 50 Ohm maximum with 50 devices
Total loop capacitance - 0.5 uF max line to line per km and 1.0 uF max line to shield per km
Note:
• The terminal blocks of Siemens SLC devices are rated for a maximum of 14AWG wire.
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