2-74
CHASSIS MODIFICATIONS
D
AILY 4x4
Base - May 2007 Print 603.93.761
Electrical System: Modifications and Drawing-Off Power
2.16.5 Additional Circuits
These must be separated and protected by a fuse from the vehicle’s main circuit.
The cables utilised must be of a siz e t hat is suitable for the relative functions an d must be well insulated. They must also be suitable
protected in sheaths (not PVC) or routed though flexible c onduits in the case of a plurality of fun ctions (we recommended the u se
of polyamide ty pe 6 plastic for flexible conduits) and they must be correctly installed in a place where they are protected from impact
and heat sou rces. Take care to avoid any chaffing with oth er components, particularly with live edges of the bodywork. The tran s it
of these cables through structural components (cross members, profiles, etc.) must be executed using suitable cable glands or protec-
tions; firstly the cables must be secured separately with insu l ated cable clamps (e.g. made of ny lon) at adequate intervals (approx.
200 mm).
In the case of external panels u se a suitable sealant on both the cable and on the panel, to avoid the risk of infiltration of water,
dust, or fumes.
Establish suitable distance between electrical wiring harnesses and other components as follows:
- 10mmfromstaticcomponents;
- 50 mm from moving components (minimum distance = 20 mm);
- 150 mm from components th at generate heat (e.g. eng ine exhaust).
Wherever possible it is good practice to follow a different cable route for signal cables interfering at high absorbed intensity (e.g.
electric motors, solenoid valves) and signals that are susceptible to low absorbed in t ensities suc h as sensors, maintaining in any event
a position as close as possible to th e metal structu re of the vehicle in both cases.
Plug and terminal connections must be protected, resistant to weathering, and executed using components of the same type as
those utilised originally on the vehicle.
Use cables and fu ses with the characteristics shown in the following table in acc o rdance with the c urrent draw:
Table 2.25
Max. continuous current
1)
(A) Cable cross-section (mm
2
) Fuse capacity
2)
(A)
0 ÷ 4 0.5 5
4 ÷ 8 1 10
8 ÷ 16 2.5 20
16 ÷ 25 4 30
25 ÷ 33 6 40
33 ÷ 40 10 50
40 ÷ 60 16 70
60 ÷ 80 25 100
80 ÷ 100 35 125
100 ÷ 140 50 150
1)
Forusesofmorethan30seconds.
2)
Depending on the position and hence the temperature that may be reached in the housing, choose fuses that can be loaded to up to 70% - 80% of their maximum
capacity.
!
The fuse must be connected as close as possible to the current take-off point.
Precautions
- Incorrect installation of electrical accessories may affect occupant safety and cause severe damage to the vehicle.Contact IVECO
if yo u h ave any questions.
- Avoid coupling w ith signal transmission cables (e.g. ABS), for which a preferential path has been defined for electromagnetic
requirements (EMI).
It sho uld be noted that when grouping several cables together, in order to compensate for the lower heat dispersal capacity
current intensity must be reduced with respect to the nominal value of a single cable.
- In vehicles subject to frequent engine starts, in the presence of power draws with limited engine running times (e.g. vehicles with
refrigerated bodies) periodic battery charges are required to maintain optimal efficiency.
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