breaker
BRAY-ker
/ˈbreɪkər/
An automatic safety switch that interrupts electric flow when current exceeds safe operational levels.
Unlike fuses which burn out and must be replaced, circuit breakers can be reset manually after tripping.
The story behind the word. Derived from Old English 'brecan' (to burst apart). Thomas Edison patented early fuses, but modern spring-loaded circuit breakers were introduced in the 1920s to safely break circuits without replacing parts.
Word relationships
- cutout: Cutout is a generic term for a disconnecting device; breaker specifically resets automatically or manually.
- fuse: A fuse melts permanently during a fault, while a breaker trips mechanically and resets.
- conductor: A conductor facilitates continuous electricity flow; a breaker deliberately breaks flow.
Commonly confused with
- overload: An overload is the dangerous excessive condition; the breaker is the device stopping it.
Word family
- break (verb): To interrupt or separate into pieces.
Collocations
- circuit breaker
- trip a breaker
- breaker panel
- main breaker
Example sentences
- "Plugging two space heaters into one wall outlet tripped the 15-amp breaker in the basement panel." Home Maintenance
- "Always lock out and tag the main circuit breaker before replacing switches or working inside boxes." Trade Practice
Memory hook
A BREAKER BREAKS the flow of current when things get too hot. Safety switch that trips on excess current.
When not to use
Do not confuse an electrical circuit breaker with ocean waves breaking on the shore.
Fun facts
- Modern arc-fault breakers can detect tiny sparks inside walls before they start electrical fires.
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