08/31/2026
You could own a transformer vault and not even know it.
If your building has a grey padlocked door with a high-voltage sign on it, that room is likely a customer-owned vault.
Under Toronto Hydro's Conditions of Service, the transformers and switchgear inside are the property of the owner, not the utility.
Inspection, maintenance, repair, and replacement. All of it sits with you.
Here's the part that surprises people.
You can't just open the door and service it.
Toronto Hydro has to arrange access every time.
The work itself has to go to a contractor qualified to do it.
So a vault inspection isn't a work order you issue on a whim. It's a coordinated job.
That coordination takes weeks. Sometimes months on a large site.
That's why planned maintenance is always better and cheaper than waiting for something to break.
A planned entry is scheduled months out within your budget cycle and provides a condition report you can act on.
An emergency entry needs the exact same coordination, except now the building is dark while you arrange it, and you're paying emergency rates to do it.
