Do I have to place my ECRA/ESA licence number on my vehicles? What is the standard size and location?

Yes, Ontario law requires that electrical contractors prominently display the licence number on your business vehicles within 90 days of the date on your licence. The number should be at least one inch (2.54 cm) high, and located on the back or both sides of the truck. Review more detailed guidelines and get copies of the ECRA/ESA logo.