Branding an electrical contracting business in Ontario: the licence number goes everywhere
The direct answer
Under Ontario Regulation 570/05, nobody may operate an electrical contracting business without an electrical contractor licence, an electrical contractor may carry on business only in the name indicated on the licence, and the contractor must prominently display the licence number in all correspondence, contracts and advertisements, on business vehicles and generally wherever it communicates with the public. The Electrical Safety Authority's guidance says the number must appear on all correspondence, contracts, invoices, business cards and ads, on the website and on business vehicles, within 90 days of receiving the licence; on vehicles the number must be at least one inch high and preceded by ECRA/ESA Lic or ECRA/ESA. The ESA logo may be used only alongside the company name, never on its own.
Five conclusions
The argument, compressed.
- Trade only under the name on the licence.
- The licence number appears prominently in all correspondence, contracts, advertisements and on business vehicles.
- ESA expects it on invoices, business cards, ads and the website too, within 90 days of licensing.
- On vehicles: at least one inch high, preceded by ECRA/ESA Lic or ECRA/ESA.
- The ESA logo may appear only with the company name, never alone.
Working framework · 4 decisions
The contractor brand kit check
Four places the licence number has to live. Build each into the identity templates once, and every new piece complies by default.
Decision 01 / 04
Name
Confirm the trading name on every sign, site and invoice matches the name on the licence exactly.
What the regulation requires
Ontario Regulation 570/05, made under the Electricity Act, 1998, licenses electrical contractors and master electricians. Section 3 says no person shall operate an electrical contracting business without an electrical contractor licence. Section 18 says an electrical contractor shall carry on business only in the name indicated on the licence. Section 19 says the contractor shall prominently display the licence number in all correspondence, contracts and advertisements, on business vehicles and, generally, in all situations where it is communicating with the public.
Together those three sections define the brand's fixed elements: one name, matching the licence, and one number that travels with it.
How the Electrical Safety Authority applies it
The Electrical Safety Authority's display guidance turns the regulation into a checklist. The licence number must appear on all correspondence, contracts, invoices, business cards and ads, including classified and directory listings, as well as on the website and the business vehicle, and the contractor has 90 days from receiving the licence to comply.
For vehicles, the number must be at least one inch high and must be preceded by ECRA/ESA Lic or ECRA/ESA. The ESA logo may be used only where the company name also appears; contractors are barred from using the ESA logo by itself.
Design it once
Treat ECRA/ESA Lic plus the number as part of the logo lockup, and it stops being something to remember.
A contractor brand built around the number
The licence number is a trust mark as much as a requirement. Homeowners are told to look for it, and a contractor whose vans, cards and website all show it clearly reads as the licensed, inspectable choice before a quote is given.
The brand work sits in what surrounds it: a distinctive name that matches the licence, a visual system that gives the number a fixed, legible place, and a clear statement of the work the contractor is known for, such as panel upgrades, EV chargers or commercial fit outs.
Before you use it
Questions that can change the recommendation.
Does an Ontario electrical contractor have to put the licence number on ads?
Yes. Section 19 of Ontario Regulation 570/05 requires the licence number to be prominently displayed in all correspondence, contracts and advertisements, on business vehicles and wherever the contractor communicates with the public.
How big does the ECRA/ESA number have to be on a truck?
The Electrical Safety Authority's guidance says the number on a business vehicle must be at least one inch (2.54 cm) high and preceded by ECRA/ESA Lic or ECRA/ESA.
Can an electrical contractor use the ESA logo?
Only with the company name present. ESA's guidance says contractors are barred from using the ESA logo by itself.
Can an electrical contractor trade under a different name from its licence?
Section 18 of the regulation says an electrical contractor shall carry on business only in the name indicated on the licence.
Research record
What this guide draws from.
Each source note describes what the reference supports. Platform guidance, research findings and Branding Tatva's practical suggestions have different scopes.
- O. Reg. 570/05: Licensing of Electrical Contractors and Master Electricians
Government of Ontario
Sections 3, 18 and 19.
- Requirements to display your licence
Electrical Safety Authority
