38
Electrical system
Main switch requirements
Normal Nominal capacity
Working
Standard
Protection
voltage Contin-
During During temp.
degree
uous
5 sec.
5.5 min. Max.
<48V 150A 1000A 450A
+ 85°C
SAE J1171
IP 66
+185°F
Marine
Total power cable length and cable area, alternator–battery
For cables that carry charging current, for systems with charge distributor.
Cable length in meter (ft)
–2.5 (8.2) 2.5–3.5 (8.2–11.5) 3.5–5.0 (11.5–16.4) 5.0–7.0 (16.4–23.0)
Cable area in mm
2
(min)
Engine D1, D2
25 35
50
70
Relation between mm²
(sq in) and AWG
AWG
mm² (std.)
sq.
in
18 0.75 0.029
16 1.5 0.044
14 2.5 0.098
12 2.5 0.098
10
6
0.236
8 10 0.393
6 10 0.393
5 16 0.629
4 25 0.984
3 25 0.984
2 35 1.378
1/0
50
1.969
Recommended start battery capacity
Engine
Ah
CCA
SAE
standard
D1
70
540
D2
88
700
CCA = Cold Cranking Amp.
Total cable length and cable area, battery to starter
For cables that carry starting current, for systems with and without charge distributor.
Cable length in meter (ft)
–1.3
1.3–1.8
1.8–2.6
2.6–3.7
3.7–4.8
(–4.2) (4.2–5.9) (5.9–8.5) (8.5–12.1) (12.1–15.7)
Cable area in mm
2
(min)
Engine D1
25 35 50 70 95
D2
35
35
50
70
95
AWG = American Wire Gauge