Preparing an Older Toronto Building for a New Tenant
A new tenant was preparing to move into a commercial space in a more than 100-year-old building in the St. Clair West area of Toronto. Before opening, they wanted the electrical system reviewed and upgraded so the space could support their new use.
The first concern was two older fuse boxes serving the space. During our inspection the equipment showed physical deterioration and visible arcing marks. The tenant also needed additional circuits, which meant the existing distribution had to be assessed before any new loads were added.
A Fuse Box Located Inside the Washroom
One of the fuse boxes was located inside the washroom. As part of the upgrade we were able to reorient the replacement equipment so the electrical panel faced the adjoining room instead of opening into the washroom.
That improved the layout while allowing the new distribution equipment to serve the space from a more appropriate location.
Further Investigation Found an Oversized Feeder Breaker
While tracing the supply to the fuse boxes we found another important issue: the breaker feeding the equipment was oversized for the downstream installation. Correcting the feeder protection required access to the building's electrical distribution, so the work could not be treated as a simple fuse-box swap.
A planned building shutdown was required so the upstream breaker protection could be corrected and the replacement equipment installed safely.
Why This Matters in Older Toronto Buildings
Older buildings often contain electrical systems that have been modified many times over decades. A visible fuse box may only be one part of the system. Before adding circuits or replacing equipment, the upstream protection, feeder conductors and existing distribution need to be evaluated as a complete system.
In this project, investigating beyond the two fuse boxes identified the oversized feeder breaker before additional circuits were installed. The same principle applies to commercial electrical work across Toronto: what is behind the cover matters more than what is on it.
Building Shutdown and Electrical Upgrade
Portman Electric coordinated the work so the building could be shut down and the feeder protection corrected. The two old fuse boxes were replaced with modern breaker equipment, and the tenant's required new circuits were added as part of the upgrade.
If you are weighing up the same decision in your own building, our guide to fuse boxes versus breaker panels explains the practical differences.
New Circuits for the Tenant Space
With the distribution upgraded, new surface-mounted conduit and receptacle circuits were installed to support the tenant's electrical requirements. This approach allowed new wiring to be added cleanly in the existing commercial space without opening up century-old finishes.
Completed Breaker Panel Upgrade
The replacement equipment was installed and positioned to face the adjoining room rather than the washroom, correcting the original arrangement while modernising the distribution serving the space.
Finished in Time for Opening
The electrical deficiencies were corrected, the old fuse equipment was replaced, the feeder protection was addressed and the tenant received the additional circuits needed for the space. The project was completed in time for the new tenant to open as scheduled.
For the tenant the result was more than a cosmetic panel replacement: the project addressed problems in the existing electrical distribution while preparing a century-old Toronto building for its next use.
