The Murray Electric MP120 is a widely available, low-voltage circuit breaker. This type of circuit breaker is most likely to be found in small rows within consumer units. They are designed to be easily removed, without the need to dismantle the switch gear. These single-pole circuit breakers can be refurbished.
Power Rating
The Murray MPC120 has an amperage rating of 20 amps, and a voltage rating of 120/240 V at 60 Hz. Its interrupting rating (AIR) is 10,000 amps. This circuit breaker also features a 12-to-8 AWG aluminum wire and a 14-to-8 AWG copper wire. The numbers on the Murray MC series circuit breakers indicate the amperage, and the MPC120 has one of the lowest amperage ratings in the series.
Physical Specifications and Safety Features
The Murray MP120 circuit breaker is approximately 1 inch wide and weighs no more than 2 lbs. when shipped. It is an interchangeable, single-pole, plug-in mounting circuit breaker. In addition, it has a switch indicator. When placed in Murray load centers, it protects against short circuits and overload which can cause electrical fires.
Accessories
Among the accessories for this circuit breaker are walking beam interlocks, kirk key interlocks, under-voltage releases, shunt trips, auxillary switches, and bell alarms. In addition, the MP120 can be mounted inside different kinds of enclosures, such as general purpose, rainproof and explosion proof enclosures.
Price
The MPC120 typically costs $9 to $11 as of January 2011, but can sometimes be found for as little as $5 or less. Refurbished MPC120s are sometimes sold for nearly identical prices as new ones.
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