BRP-Rotax
INSTALLATION MANUAL
I [m]
I [ft]
A
min.
[mm
2
]
A
min.
[in
2
]
A
max.
[mm
2
]
A
max.
[in
2
]
AWG
min.
<4
<13
20.408
0.031
25
0.039
4
4<I<4.5
13<I<14.8
22.959
0.036
35
0.054
3
4.5<I<5
14.8<I<16.4
25.51
0.04
35
0.054
3
5<I<5.5
16.4<I<18
28.061
0.043
35
0.054
2
5.5<I<6
18<I<19.7
30.612
0.047
35
0.054
2
6<I<6.5
19.7<I<21.3
33.163
0.051
35
0.054
2
6.5<I<7
21.3<I<23
35.714
0.055
50
0.078
1
7<I<7.5
23<I<24.6
38.265
0.059
50
0.078
1
7.5<I<8
24.6<I<26.2
40.816
0.063
50
0.078
1
8<I<8.5
26.2<I<27.9
43.367
0.067
70
0.109
0
8.5<I<9
27.9<I<29.5
45.918
0.071
70
0.109
0
9<I<9.5
29.5<I<31.2
48.469
0.075
70
0.109
0
9.5<I<10
31.2<I<32.8
51.02
0.079
70
0.109
0
The internal resistance of the battery and the resistance of the electrical system (wires,
contact points, relay contacts) largely determine the performance of the starting system.
Therefore, the total loop resistance (RS
max
) may not exceed 0.015 Ω.
R
Smax
= Ʃ R = R
iBatt
+R
C Starter relay
+R
L
+ R
Other
Symbol
Description
R
iBatt
Inner resistance of battery
R
C Starter Relay
Contact resistance starter relay
R
L
Line resistance
R
Other
Any other resistor (e.g. Master relay, contact resistance...)
Page 6
December 01 2017
Effectivity: 915 i A Series
Edition 0/Rev. 0
Summary of Contents for 915 iS 3 A
Page 165: ......