SPECIAL INSTRUCTIONS FOR ELECTRONIC SUBSYSTEMS 5-35 E UROCARGO Euro 4/5 Table 5.26 1) For uses longer than 30 seconds Depending on the position and therefore the temperature that can be reached in the housing compartment, choose fuses that can be loaded up to 70% - 80% of their maximum capacity. It is wise to keep in mind that in grouping a number of cables, it will be necessary to have a reduction in the strength of the current compared to the nominal value of a single cable to compensate for the less heat dispersion. On vehicles where frequent engine starts are done, with current drawing and limited engine rotation times (e.g.
vehicles with cold storage), plan for periodical battery charging to keep it efficient. The jack connections and terminals will have to be of the protected type, resistant to the weather, using components of the same type as those originally used on the vehicle. 5.8.7 Operations for changing the wheelbase and the overhang If the length of the cables must be changed for the new size of the wheelbase and/or of the overhang, there must be a watertight box of the same characteristics as those on our vehicles. The components used such as cables, couplings, terminal blocks, corrugated pipes, etc. must be of the same type as the ones originally used and be correctly installed.
5.8.8 Drawing power at a different voltage to that of the system With the 24V system, if a 12V electric supply is required, it is necessary to use a suitable voltage reducer that draws on the normal circuit; drawing from a single battery is not allowed for the negative effects that it would have on the batteries when recharging. NOTE Auxiliary 12V+24V connectors on fuse 70601/5 Both the 24Vche connector, via a converter, and the three 12V connectors are connected to fuse 70601/5. If 20A are drawn from the 12V connectors, only 5A is available from the 24V connector (to specify that 20A on the 12V converter means 14A on the electric supply fuse).
5A are always available on the 24V connector; if the 12V connectors are not used, 20A can be reached on 24V. The converter is protected from overloads and short-circuiting. If 20A are used on the 12V and 20A on the 24V, fuse 70601/5 will get damaged. Electrical system: modifications and drawing-off power Print 603.93.431 Base - January 2008 Continuous max current 1) (A) Cable cross-section (mm2) 4 0.5 10 1 20 2.5 25 4 35 6 50 10 70 16 90 25 120 35 150 50