When your entire house loses electrical power but all circuit breakers in your main service panel remain firmly in the "On" position, the failure typically originates outside your home on the utility company's side of the system. Common causes include a major neighborhood power outage caused by a blown transformer, downed transmission lines from a storm, or a snapped overhead service drop cable running from the utility pole to your house. Alternatively, a main breaker can fail internally while remaining in the "On" position. You can troubleshoot power outages safely by checking if neighboring homes are dark. You can verify that your corrective action is successful when contacting your electric utility provider to report the outage or having a licensed electrician replace a faulty main breaker restores steady power to your home distribution system.
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