What does QO mean on a circuit breaker?
QO® (plug-on) one-, two- and three-pole thermal-magnetic circuit breakers provide overcurrent protection and switching on ac and dc systems.
What are 220 breakers?
220 Volt Circuit Breakers – These breakers usually power electric furnaces, dryers, heat pumps, and water heaters. 220 volt breakers each take up 2 slots in the panel.
What is AF and at in circuit breaker?
AF refers to the ampere rating of the breaker frame and AT refers to the breaker trip rating in amps.
How are circuit breakers classified?
There are several methods of classification of circuit breakers. By the arc extinction medium, the circuit breaker is categorised into four types. They are the air break circuit breaker, air blast circuit breaker, sulphur hexafluoride circuit breaker and vacuum circuit breaker.
What is better homeline or QO?
The main difference between the two is that the Homeline is rated for residential use only. The Qo is not only rated for business use, but it comes in more size options, up to 3-pole breakers. The costs are negligible for each; the Homeline is $4-5 whereas the Qo is $9-10.
What does a 220V breaker look like?
Two breakers are needed, one for each bus bar and one for each wire that connects to that bar, because a 220-volt circuit connects to both bus bars. A 220-volt breaker is known as a double-pole breaker.
What is the function of MCCB?
A moulded case circuit breaker (MCCB) is a type of electrical protection device that is used to protect the electrical circuit from excessive current, which can cause overload or short circuit.
What is electrical 2P?
2P—Single-phase 2-pole circuit breaker, which controls the live and neutral wires at the same time, and both have the function of thermal and magnetic tripping.
What is ABC in MCB?
‘B’ Curve MCB is used for the protection of circuits with equipment that does not cause surge current, like lighting and distribution circuits. So they are, the best fit for residential applications and domestic appliances with mainly Resistive Load.