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Frequently Asked Questions (FAQ) about Circuit Breakers
Friday, April 15, 2022
The building code refers to a circuit breaker as an OCPD, which stands for Over-Current Protective Device. Here’s a selection of our articles about them:
• What is the maximum number of circuit breakers allowed in an electric panel?
• Can you add circuit breakers by different manufacturers to an electric panel if they fit?
• My circuit breaker won't reset. What's wrong?
• What causes a hot circuit breaker in an electrical panel?
• What temperature is too hot for a circuit breaker?
• What does maximum sum of breaker ratings per stab mean in an electrical panel?
• What is the life expectancy of a circuit breaker?
• What is a tandem circuit breaker?
• What is a double tap at a circuit breaker?
• When did arc fault circuit interrupter (AFCI) breakers first become required?
• How do I identify a combination AFCI (CAFCI) circuit breaker?
• What does a circuit breaker with a yellow or white test button indicate?
• What is the difference between GFCI and AFCI circuit breakers?
• What happens when you press the "TEST" button on a circuit breaker in an electric panel?
• What is a Dual Function Circuit Interrupter (DFCI)?
• What does it mean when a wire is "overstripped" at a circuit breaker?
• Why is there a GFCI breaker in the electric panel for the bathroom shower light and exhaust fan?
• What is a lock device on a circuit breaker for?
• Why is the circuit breaker stuck in the middle?
• Why is there a 3-phase breaker in a single phase electric panel with only two bus bars?
• What is the maximum allowed height of a circuit breaker (OCPD) above the floor?
• Why is there no main shut-off breaker in my electric panel?
• Can an unused (spare) circuit breaker remain in an electrical panel or does it have to be removed?
• Can circuit breakers be installed upside-down, with the breaker "ON" in the down position?
• When did circuit breakers replace fuses in homes?
• Does a subpanel require a main breaker by code?
• Are double tapped breakers illegal?
• What is a classified circuit breaker?
• What is the difference between specified and classified circuit breakers?
• Can you substitute two 120-volt breakers for a 240-volt breaker in a panel?
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