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About 2.2 million Siemens and Murray circuit breakers are being recalled over concerns a spring clip can break and cause the breakers to fail, the U.S. Consumer Product Safety Commission said.
Zinsco would remain with copper in both their panels and breakers until the third major copper shortage in the early 1960s, when they would switch to an aluminum bus. In 1963, Zinsco introduced the R-38 twin breaker, which was the only twin circuit breaker that also made contact on both bus-bars for 240 volts in a single breaker space.
A circuit breaker is an electrical safety device designed to protect an electrical circuit from damage caused by current in excess of that which the equipment can safely carry ( overcurrent ). Its basic function is to interrupt current flow to protect equipment and to prevent fire. Unlike a fuse, which operates once and then must be replaced, a ...
Informing other CB users that you would like to start a transmission on a channel. May be followed by either the channel number, indicating that anyone may acknowledge (e.g., "Breaker One-niner" refers to channel 19, the most widely used among truck drivers), or by a specific "handle", which is requesting a particular individual to respond. [6]
Breaking capacity. Breaking capacity or interrupting rating [1] [2] is the current that a fuse, circuit breaker, or other electrical apparatus is able to interrupt without being destroyed or causing an electric arc with unacceptable duration. The prospective short-circuit current that can occur under short circuit conditions should not exceed ...
An earth-leakage circuit breaker ( ELCB) is a safety device used in electrical installations with high Earth impedance to prevent shock. It detects small stray voltages on the metal enclosures of electrical equipment, and interrupts the circuit if a dangerous voltage is detected. Once widely used, more recent installations instead use residual ...
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