Chapter 3: Installation and Testing
14
3.3
Connections and Wiring
3.3.1
General Wiring Recommendations
To maximise performance, minimise EMC emissions, maximise EMC and ESD immunity, and to
keep the cabling of the scooter safe and tidy, please observe the following guidelines.
Keep all cables as short as possible.
Avoid wire loops, especially loops of single wires instead of wire pairs.
Try to run wires in pairs or bunches. For example, run the battery positive and negative
wires together, and the motor positive and negative wires together. Bind wires together
and fix them to the chassis.
Do not route the cables (including the motor cable) near the motor case, where possible.
Do not leave electrical connections unnecessarily exposed. Insulate exposed
connections (for example with sleeving) to reduce the risk of short circuits, exposure to
water and connection stress.
Make sure that all vehicle sub-frames, particularly the transaxle, controller case and tiller
head assemblies, are electrically connected.
Make sure that the controller and speed setting potentiometers are electrically
connected to the vehicle frame.
Do not use the vehicle frame as the earth return. Any electrical low-resistance connection
to the frame is a safety risk and is not allowed by international safety standards.
To minimise electromagnetic emissions by the motor brushes, it may be necessary to fit
capacitors between the brush holders and the motor case. Make sure that the leads are
kept as short as possible. A suitable capacitor is 4n7, 2kV Ceramic.