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Q: When calculating circuit breaker size for motors how would you determined which number to multiply by - 1.25 percent - 1.75 percent or 2.25 percent - as the size of the HP and voltage increases?
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What best breaker rating for 1.5 hp air con unit?

The breaker you use is determined by the size of the wire in the wall not by what is being connected to that circuit. If you have 14/2 wire then use a 15 amp breaker. If you have 12/2 wire then use a 20 amp breaker. The breaker protects the wiring not the item connected.


What best breaker rating for 1.5 hp air-con unit?

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How do you calculate rated kva of a circuit breaker?

You don't calculate the rated kV.A of a circuit breaker; it's determined by the manufacturer. It's important that a circuit breaker's rated kV.A exceeds the fault level kV.A at the point where the circuit breaker is located, otherwise it may fail to interrupt a fault current and, possibly, self destruct.


What size circuit breaker is needed for a 300 watt bulb?

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What is the ton rating of ckt48-18?

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Why does the surge protectors circuit breaker trip if a surge or overload is detected?

A circuit breaker shuts off the power to an electrical circuit when it detects too much current flow. As electricity moves through wiring, an electromagnetic field develops around the wire. Electromagnetic breakers capitalize on this field production by using electromagnets. The current that moves through the breaker charges the electromagnet and as the current increases the magnetic pull also increases. If the current exceeds the limit the breaker is designed to handle, the magnetic pull becomes strong enough to pull the contact plate away from the stationary plate. This breaks the circuit and is referred to as "tripping the breaker. A surge protector on the other hand prevents a voltager higher than the normal voltage from damaging electical devices. It does not shut off the power as a circuit breaker or fuse does.


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