WIRING in a vehicle is the distribution of current from the battery to all electrical components and also carries signals from sensors and switches. Wiring done at the manufacturer are usually hazard free. However, there are modifications done to meet the owner’s requirements. Such modifications include installation of new audio/video devices, lighting/ signalling system, sensors, meters, air conditioning display system, cameras, electronic horns, fans etc.
The important factors that need to be considered in modification are wire size, wire material, wire colour (coding of wires), correct protective components and connectors.
The vital aspect of wiring is that it must be correctly done.
An improper wiring leads to hazards, such as ignition of fire which can lead to explosion of the vehicle. Henceforth a correct standard must be followed.
The Land Transport Authority of Fiji has formulated a standard to enforce our entire vehicle owners and the auto electricians to prevent hazards relating to these modifications.
Critical areas
* Master switch
When major electrical wiring modifications are done, a master switch should be present in reach of the driver in driving position. Example in Omni-buses. This could act as a fuse when a major electrical fault occurs.
* Fuse
Appropriate fuse(s) must be used for new installations of electric drives.
Wire size
Appropriate wire size must be used taking into consideration the current carrying capacity.
Wire colour coding
All wiring done in the vehicle must be colour coded or labelled.
Duct, insulation, sleeving
All wires in the modifications must be well ducted or sleeved to prevent exposure to adverse conditions which can lead to its damage. Cable that enters the passenger compartment should always be protected by a secure cover
Connectors
Appropriate connectors must be used to connect or join two (2) or more wire ends. Refrain from entangling and twisting of the wire ends.
Appropriate routing
Secure fastening of the wires must be maintained. Ensure most suitable passage is used to route these cables. The passage should not; be dissipating a lot of heat, be in non-moving parts, near fuel system, and other related areas in the vehicle that can lead to deterioration of the cable.
