Spectrex SharpEye 40/40I, User Manual

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General Instructions for Electrical Wiring 65
B Wiring Instructions
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In this appendix…
General Instructions for Electrical Wiring page 65
Typical Wiring Configurations page 67
B.1 General Instructions for Electrical Wiring
Follow the instructions detailed in this section for determining the correct
wire gauge to be used for the installation.
1
Use Table 25 to determine the required wire gauge/size for general
wiring, such as relay wiring. Calculate the permitted voltage drop with
respect to load current, wire gauge, and length of wires.
Table 25: Maximum DC Resistance at 68°F/20ºC for Copper Wire
AWG # mm
2
Ohm per 100ft Ohm per 100m
26 0.12 – 0.15 4.32 14.15
24 0.16 – 0.24 3.42 11.22
22 0.30 – 0.38 1.71 5.60
20 0.51 – 0.61 1.07 3.50
18 0.81 – 0.96 0.67 2.20
16 1.22 – 1.43 0.43 1.40
14 1.94 – 2.28 0.27 0.88
12 3.09 – 3.40 0.17 0.55
10 4.56 – 6.64 0.11 0.35
2
Use Table 26 to select wire gauge for power supply wires. DO NOT
connect any circuit or load to detectors’ supply inputs.
 Select Number of detectors connected in 1 circuit.
 Select wiring Length per your installation requirements.
 Refer to Power Supply Range for voltage extreme applied.
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