TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Specifications
Section V - Specifications
Page V-67
Wiring Size Recommendations - Starter and Fuel Solenoid
Recommended Wire Gauge Table
(Values in table are AWG. size for 12/24-VDC systems)
Wire Length in Circuit
Battery to A
A to B
A to C
0.91 m [3 ft]
10/14
12/14
14/16
1.21 m [4 ft]
10/12
10/14
14/16
1.52 m [5 ft]
8/10
10/12
14/16
2.74 m [9 ft]
6/8
8/10
12/14
5.49 m [18 ft]
4/6
6/8
8/10
Wire length in circuit means total length in each individual circuit, e.g., Battery to A equals one circuit.
For example, in a 12-VDC circuit:
Battery to A = 1.52 m [5 ft]; gauge required = 8 gauge
A to B = 1.52 m [5 ft]; gauge required = 10 gauge
A to C = 2.74 m [9 ft]; gauge required = 12 gauge.
If the system is double-pole wiring (no frame ground), then the fuel and starter solenoid circuit lengths would include
the return cable run to the battery negative (-) post.
L-1431
