Owner`s manual

VANNER Incorporated Testing and Troubleshooting
70-Series Power Management System OWNER’S MANUAL
13
Wire Size and temperature rating
Cables connecting the VANN-Guard to the batteries must be sufficiently sized to prevent unwanted
voltage drops. These voltage drops (loss) must be less than 0.05 VDC between the VANN-Guard’s +24
volt terminal and the battery +24 volt terminal (Battery B positive terminal), less than 0.10 VDC between
the VANN-Guard’s +12 volt terminal and the battery +12 volt terminal (the jumper between Battery A and
Battery B), and less than 0.05 VDC between the VANN-Guard’s GND terminal and the battery ground
terminal (Battery A negative terminal that is connected to chassis ground). In most installations, the
VANN-Guard’s terminals are wired directly to the battery terminals (reference fault protection) to prevent
voltage loss that could occur in switch contacts, connections, and long wire runs. Since the VANN-Guard
can be operated in temperatures up to 75ºC, use wire rated at least 90ºC. See Wire and Fuse Size Chart.
Wire and Fuse Size Chart
Wire
Size
AWG
Ring Terminal
AMP or UL
recognized
equal
Max wire length, in feet, between VANN-Guard and battery to keep voltage drop under 0.1
volt. The chart assumes wire carries no other load and wire temperature is below 80ºC.
70-60M
70-80M
70-100M
2 X 70-100M
#8
33462
2.1
XXX
XXX
XXX
#6
33466
3.2
2.4
XXX
XXX
#4
33470
5.9
4.4
3.5
XXX
#2
322870
8.7
6.5
5.2
2.6
#1
321867
10.9
8.2
6.5
3.3
#1/0
321867
13.8
10.4
8.3
4.1
#2/0
321870
17.6
13.2
10.5
5.3
Fuse F1
80 amp
100 amp
125 amp
250 amp
Fuse F2
40 amp
50 amp
80 amp
150 amp
Crimp the ring terminals using AMP ROTA-CRIMP 600850 (2/0 - 8ga).
AMP Product Information Center: 800-522-6752
AMP Tooling Assistance Center: 800-722-1111
Note: The wire gages listed are for use without remote sense, see the monitor section for applications
using the remote sense capability.