- Demelco Electric
 - Contractor specializing in the installation and maintenance of electrical components in the retail petroleum industry. - Falvo Electrical Supply Ltd.
- New and reconditioned electrical supplies.
- Hubbell Canada
- Lindemann Electric Services Inc.
- Electrical contractor, panel builder, and automation company.
- Power-Tek Electrical Services Inc.
- Electrical, communications technical integration, event, and facility management services in the Ottawa area.
- Ross Morrison Electrical Ltd
- Designs, supplies and installs electrical systems and manufacture PLC and relay logic panels.
- Shore Acre Enterprises, Inc.
- Specializes in the engineering, supply, and installation of grounding systems. Also offers products including conductive concrete and lightning strike counters.
- Smith and Long Limited
- Offers electrical construction, data communications, and automation.
- State Group Limited, The
- Electrical and mechanical contracting company.
- Wil-Can Electronics
- Lightning & transient control.
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