Starting Battery Cable Area
Volvo Penta recommends cable cross-sections
according to the table below in order to provide suffi-
cient power from the battery to the starter motor.
NOTICE! The list applies to both 12 V and 24 V sys-
tems.
Measure the total cable length from the battery pos-
itive
terminal (+) via the main switch to the starter motor
positive connection (+), and from the starter motor
negative connection (-) back to the battery negative
terminal (-).
Then select the recommended cable area according to
table below for both the negative cable (-) and the
positive cable (+).
Because the cable must absorb generated heat, the
cross-sectional area must be no less than 50 mm²
(0.076 in.
2
).
The total start battery cable length and cable cross section in temperature class 70 °C
(158 °F)
Total length of positive (+) and negative (-)
cables, max. length m (ft.)
7,3 (24) 9,7 (32) 12,4 (41)
Cable area, mm² (AWG) 70 (00) 95 (000) 120 (0000)
Comparison cable cross section (mm²) – diameter (mm) according to Volvo standard (SS
IEC 228)
Cross section, mm² (AWG) 50 (0) 70 (00) 95 (000) 120 (0000)
Core diameter approx., mm (in.) 12 (0.47) 14 (0.55) 16 (0.63) 18 (0.71)
IPS800