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12 C2941M (8/07)
Table C.
Recommended Wire Gauge and Wiring Distances
The following are the recommended maximum distances for 24 VAC applications and are calculated with a
10-percent voltage drop. (Ten percent is generally the maximum allowable voltage drop for AC-powered
devices.)
Wire Gauge
Example:
A camera that requires 10 VA and is installed 283 ft (86 m) from the transformer would require
a minimum wire gauge of 20 AWG.
NOTE:
Wire gauges are standard AWG or metric sizes. Distances are calculated in feet; values in
parentheses are meters.
Total
VA
20
(0.5 mm
2
)
18
(1.0 mm
2
)
16
(1.5 mm
2
)
14
(2.5 mm
2
)
12
(4.0 mm
2
)
10
(6.0 mm
2
)
10 283
(86)
451
(137)
716
(218)
1142
(348)
1811
(551)
2880
(877)