What are the transformer oil containment requirements in Canada?

In Canada, the transformer oil containment requirements mandate that power transformers must have secondary containment systems to prevent oil spills from contaminating the environment. This includes using impermeable barriers, such as dikes or bunds, that can hold at least 110% of the transformer oil capacity. Additionally, regular inspections and maintenance of these containment systems are required to ensure their integrity and effectiveness in case of leaks or spills.