How many outlets can I put on one circuit in Ontario?

In Ontario, the number of outlets per circuit depends on the circuit amperage and load calculations, but there are practical guidelines most electricians follow.

For 15-amp circuits, the Ontario Electrical Safety Code doesn't specify an exact outlet limit, but electricians typically install 8-12 outlets maximum. For 20-amp circuits, you can generally have 10-16 outlets. However, the actual number depends on the expected electrical load rather than just counting outlets.

The load calculation method is what really matters according to the OESC. Each outlet is calculated at 180 watts for load purposes. On a 15-amp circuit (1,800 watts capacity), you'd theoretically have room for 10 outlets at full load. But since you should only load a circuit to 80% capacity for continuous use, that drops to about 8 outlets for safety.

Kitchen and bathroom circuits have special requirements in Ontario. Kitchen counter outlets must be on dedicated 20-amp circuits, with no more than 2 outlets per circuit in some cases. Bathroom outlets require GFCI protection and are often on dedicated circuits. These areas have higher electrical demands, so fewer outlets per circuit is standard.

Bedroom and living area circuits can typically handle more outlets since the loads are usually lighter - lamps, electronics, and occasional vacuum use. Many electricians will put 10-12 outlets on a 15-amp bedroom circuit without issues.

The wire gauge must match the circuit rating - 14 AWG copper wire for 15-amp circuits, 12 AWG for 20-amp circuits. Using undersized wire for the circuit amperage violates the OESC and creates fire risks.

ESA inspectors focus on proper load calculations rather than just counting outlets. If you're adding outlets to existing circuits, a licensed electrician should verify the circuit can handle the additional load. Adding outlets to existing circuits typically requires an ESA permit in Ontario.

For your specific situation, it's best to have a licensed electrician assess your current circuits and electrical needs. They can determine the optimal outlet placement while ensuring code compliance and safety.

Want to discuss adding outlets to your home? Electrical Ottawa's ESA-licensed electricians can provide a free consultation and ensure your electrical work meets all Ontario requirements.

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