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A breaker that trips consistently when you use the microwave almost always points to circuit overload, and it is one of the more predictable and fixable electrical patterns homeowners run into. Here is why it happens and how it is typically resolved, from the licensed electricians at EZSMART, serving Toronto and the GTA.
Microwaves draw a significant amount of current, especially higher-wattage models, and many kitchens were originally wired decades ago when microwaves were smaller or less common. If your microwave shares a circuit with other kitchen appliances, such as a toaster, kettle, or coffee maker, the combined load when multiple items run together can exceed what that circuit is rated for.
If it is a shared circuit issue, the most common solution is adding a dedicated circuit for the microwave, which is standard practice in modern kitchen wiring. If the breaker itself is aging or overly sensitive, replacing it with a properly rated breaker, such as those from Eaton or Square D, may resolve it. A licensed electrician can confirm the cause and recommend the right fix, with any new circuit work permitted through the Electrical Safety Authority.
Do microwaves need their own dedicated circuit?
Modern kitchen wiring standards often call for this, particularly for built-in or higher-wattage microwaves, though many older homes were not wired this way.
Is it expensive to add a dedicated circuit for a microwave?
Cost depends on your panel’s available capacity and the distance from the panel to the kitchen. A licensed electrician can provide a quote after assessment.
Could my microwave itself be the problem?
Yes, an aging or failing microwave can draw excess current. If the issue persists even with nothing else on the circuit, this is worth considering.
Is it safe to keep using the microwave if it keeps tripping the breaker?
It is safer to have the cause diagnosed rather than continuing to reset the breaker repeatedly, since the underlying overload or fault does not resolve on its own.
Tired of your breaker tripping every time you use the microwave? EZSMART provides licensed circuit diagnostics and dedicated circuit installation across Toronto and the GTA. Call 416-838-9006, and see what our customers say on our Google reviews page.
Electrician Since 2008 Journeyman Electrician Designated Master Electrician at EZSMART Corp
