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Kaba Mas
Minimum gauge wire chart for lock circuits
The chart in Figure A2 helps you find the minimum wire gauge needed for a specific length wire run. It assumes that the
lock circuit is made of two conductor cable. The chart also factors in a 15% voltage loss at 24 volts.
Maximum
1.500
lock current
(in amps)
1.375
1.250
1.125
1.000
.875
.750
.625
.500
.375
.250
.125
0
Figure A2: Minimum gauge wire charts for lock circuits
To find the correct gauge wire
1. Determine the maximum lock current and find that value
on the left side of the chart.
2. Determine the total footage of cable to be used in
the lock circuit and find that value at the bottom of
the chart.
3. Locate the intersection of current and footage. The line
above or to the right of the intersections shows what
minimum gauge wire you need.
Example
p Lock current: 0.18 amp maximum
p Total wire run: 1000 feet
Wire guage needed: 20 AWG two conductor cable
Note: For 12 volt locks, double the maximum lock current,
then use that value on the left side of the chart.
26
Installation Guide / DKX-10 Type II
Example
Total footage of two conductor cable for lock circuit (in feet)
Installation hints
1. Wire gauge (or size) determines how efficiently the lock
2. Use wire of 20 AWG (gauge) or larger. We do not
3. When wiring two or more locks to a single power supply,
Example
For two locks powered by one supply:
p Lock 1 (9KW) is rated at 24 volts, 0.18 amps—24 volts X
p Lock 2 (45HW) is rated at 24 volts, 0.75 amps—24 volts
Choose a transformer with a rating of at least: (4.32
volt-amps + 18 volt-amps) X 1 1/2 = 33.48 volt-amps
will operate. Consider wire gauge before installation. To
find the recommended minimum wire gauge for all wire
runs, see Figure A2.
recommend using a smaller wire gauge than 20 AWG.
make sure that the power rating of the power supply is 1
1/2 times greater than the sum of the lock's power
requirement.
0.18 amps = 4.32 volt-amps
X 0.75 amps = 18 volt-amps
Document Number 548.0418 Rev. AX — 02/2019
Do not use this
chart for any plots
made to this shaded
area.
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