What Are 2 Pole MCBs?

Stuart Williams
By Stuart Williams 5 Min Read
what are 2 pole mcbs

In every household’s main circuit panel, you would find two kinds of circuit breakers:

  1. Single pole MCB or miniature circuit breaker
  2. 2 pole MCB or miniature circuit breaker

Here’s what they are: a circuit breaker is a safety device used to guard houses or institutions against major short-circuit damages. Its primary purpose is to stop the flow of current to safeguard machinery and lower the likelihood of a fire. In addition, a circuit breaker can manually or automatically reset itself, unlike a fuse, which can only be used once before needing to be replaced. Many circuit breakers range from tiny devices that protect low-current circuits or specific home appliances to massive switchgear built to safeguard high-voltage circuits supplying an entire city.

Single-pole breakers function on 120 volts and run on 15-20 amperes. They control your house’s appliance circuits and other regular lighting and circuits. The breakers are sleek in design and fit into a single slot in the home’s breaker box. On the other hand, 2 pole MCBs function on 240 volts and run on 20-60 amperes.

With that, let us now focus on 2 pole MCB, their functionality and the advantages they carry.

Defining a 2 Pole MCB

These breakers are literally “double-wide” and occupy two slots in the breaker box. The toggle switch on these is twice as long as the toggle on single-pole breakers. They supply power to large appliances like dryers, air conditioners, boilers, etc. The 2 pole MCBs comprise two conductors: two are hot, while the other is a common neutral connection.

The functionality of 2 Pole MCB

A double-pole breaker is just two single-pole breakers stacked on top of one another. When you snap the breaker into position, the first breaker clips into one hot bus and the second onto the other hot bus, both wires are disconnected from the bus simultaneously thanks to an inbuilt trip mechanism that ensures this. There must be two hot wires on the circuit that this sort of breaker regulates. One of the wires, typically black, is connected to one breaker, and the other, typically red, is connected to the other. The circuit is finished by a white wire connected to the neutral bus and shielded by a bare or green wire attached to the ground bus. Double-pole breakers are rated for larger currents because they manage circuits that produce more power than single-pole circuits. Depending on the appliance, you should utilize a certain grade. For instance, while ranges and electric heating systems often require 50- and even 60-amp breakers, window air conditioners and water heaters normally only need 30-amp breakers.

Installing A 2 Pole MCB

The wiring of a 2 pole MCB comprises two hot wires—one of which has red and black insulation—and one neutral wire—which is covered with white insulation. Split the wires and remove inches of spacing from either end if the cable is plugged into the panel. You must next make the following connections to install the 60-ampere 2 pole MCB: first, attach the white wire with its white wires to the neutral chrome bus. The ground wire should then be linked to the ground bus, which is also connected to other ground wires. The black wire should then be connected to the other lug of the 60-ampere breaker after connecting the red wire to the first lug. When everything is near, position the breaker before an open slot and snap it into place.

If the panel board you are using for installation is configured for a tandem circuit breaker, feel free to use that instead.


We have realized how vital any miniature circuit breaker is, whether a single pole or even a double pole. The whole point of their installation lies in safety from a major mishap that might potentially take place.

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Hey, I'm Stuart, a tech enthusiast and writing expert. With a passion for technology, I specialize in crafting in-depth articles, reviews, and affiliate content. In the ever-evolving world of digital marketing, I've witnessed how the age of the internet has transformed technology journalism. Even in the era of social media and video marketing, reading articles remains crucial for gaining valuable insights and staying informed. Join me as we explore the exciting realm of tech together!
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