Emerson UVU-140A Smoke Alarm User Manual


 
19
Appendix C Wire Resistance In Ohms
Distance
(Feet)
AWG #20 AWG #18 AWG #16 AWG #14 AWG #12 AWG #10 AWG #8
100 1.02 0.64 0.40 0.25 0.16 0.10 0.06
200 2.03 1.28 0.08 0.51 0.32 0.20 0.13
300 3.05 1.92 1.20 0.76 0.48 0.30 0.19
400 4.06 2.55 1.61 1.01 0.64 0.40 0.25
500 5.08 3.20 2.01 1.26 0.79 0.50 0.31
600 6. 09 3. 83 2. 41 1. 52 0. 95 0. 60 0. 38
700 7.11 4.47 2.81 1.77 1.11 0.70 0.44
800 8.12 5.11 3.21 2.02 1.27 0.80 0.50
900 9.14 5.75 3.61 2.27 1.43 0.90 0.57
1000 10.20 6.39 4.02 2.53 1.59 1.09 0.63
1250 12.70 7.99 5.03 3.16 1.99 1.25 0.79
1500 15.20 9.58 6.02 3.79 2.38 1.50 0.94
1750 17.80 11.20 7.03 4.42 2.78 1.75 1.10
2000 20.30 12.80 8.03 5.05 3.18 2.00 1.26
2250 22.80 14.40 9.03 5.68 3.57 2.25 1.41
2500 25.40 16.00 10.00 6.31 3.97 2.50 1.57
3000 30.50 19.20 12.00 7.58 4.76 3.00 1.88
3500 35.50 22.40 14.10 8.84 5.56 3.50 2.21
4000 40.60 25.50 16.10 10.00 6.35 4.00 2.51
4500 45.70 28.70 18.10 11.40 7.15 4.50 2.82
5000 50.10 32.00 20.10 12.60 7.94 5.00 3.14
5500 55.80 35.10 22.10 13.91 8.73 5.50 3.46
6000 61.00 38.30 24.10 15.20 9.53 6.00 3.77
6500 66.00 41.50 26.10 16.40 10.30 6.50 4.08
7000 71.10 44.70 28.10 17.70 11.10 7.00 4.40
7500 76.10 47.90 30.10 19.00 12.00 7.49 4.71
8000 81.20 51.10 23.10 20.20 12.70 7.99 5.03
9000 91.40 57.50 36.10 22.70 14.30 8.99 5.65
10 000 102.00 63.90 40.20 25.30 15.90 9.99 6.28
NOTE: RESISTANCE SHOWN IS ONE WAY. THIS FIGURE SHOULD BE DOUBLED WHEN
DETERMINING CLOSED LOOP RESISTANCE.