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This manual prescribes minimum installation requirements for portable generators, in the event of unplanned outage or planned electrical works by the department or the power supply authority, for use on traffic signal sites only.

The portable generator covered under this guide must comply with the requirements of MRTS259.

In general, a traffic signal controller is expected to be equipped with a standby generator connection and a switch (see Figure 6.1.1). For other traffic signal controllers not equipped with a changeover switch, an acceptable connection point to manufacturer's specifications must be assessed before retro-fitting. Details of acceptable generator connection kits for retrofitting traffic controllers are provided in Appendices A to D.

ITS and Road lighting switchboards are not equipped with changeover switches to enable generator connection and therefore not covered under this document.