TP-5592 7/96 Installation 6-19
Battery
Batteries and their installation must conform to USCG
Regulations183.420 (a) through(g). Provide generator
setswithbatteriesseparatefromthepropulsionengines
whenever possible. The starting/charging systems of
both the generator set and the engine must have a
common negative (--) ground.
USCG Regulation 183.415, Grounding, requires
connection of a common conductor to each grounded
cranking motor circuit. Size this conductor to match the
larger of the engine’s two battery cables. Figure 6-18
lists cable sizes for generator setbattery connectionsat
various ambient temperatures. Connecting a common
conductor to each grounded cranking motor circuit
prevents the starting motor current from using
alternative electrical paths should the cranking motor
ground circuit be restricted or open due to oxidation or
loose hardware. Alternative electrical paths include
metallic fuel lines which can pose a fire hazard. See
Figure 6-19 for battery connections to generator set.
Distance between
Generator Set
and Battery ft. (m)
At 0°F
(-18°C)
Cable
Size
(AWG) At
32°F
(0°C)
At
75°F
(24°C)
40 (12.2) 00 0 1
30 (9.1) 0 1 2
25 (7.6) 1 2 4
20 (6.1) 2 2 6
15 (4.6) 2 4 6
10 (3.0) 4 6 8
5 (1.5) 6 6 8
2.5 (0.8) 8 8 8
Figure 6-18. Battery Cable Sizes
DA-250000-H
1
2
3
5
4
1. Starter solenoid
2. Battery positive (+) connection
3. Equipment ground
4. Engine block mount
5. Battery negative (--) connection
Figure 6-19. Battery Connections
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