How to Choose The Right Circuit Breaker

Size

Evaluate the wire size indicated on the cable that will be attached to the circuit breaker to determine the optimum size circuit breaker for your specific domestic purposes. There are two metrics listed: The first number represents the wire gauge, followed by a dash, and a second number indicating the number of wires within the cable. After you’ve determined the wire gauge, use the chart below to select the appropriate circuit breaker:

A 40-amp circuit breaker is made of 8-gauge wire.
A 30-amp circuit breaker with 10-gauge wire
A 20-amp circuit breaker with 12-gauge wire
A 15-amp circuit breaker with 14-gauge wire

Ambient Temperature

A temperature of more than 104°F necessitates calibration. The functioning of the circuit breaker might be affected by high ambient temperatures. Almost all domestic circuit breakers use this calibration because most enclosures are around 104°F.

If the temperature is below or over 104°F, you may need to calibrate upward or downward.

Altitude

Different circuit breakers are appropriate at various different altitudes. High elevations exceeding 6000 feet, for example, have thinner air that does not transport away the heat from current-carrying components. This necessitates calibrating the circuit breaker for voltage, carrying capacity, and interrupting capability.

The build-up of electrical charge that is able to withstand voltage levels is prevented by thinner air. Altitude can also reduce the efficiency of power-producing equipment. Before choosing circuit breakers for high attitudes, consult a power generation professional.

Moisture And Corrosion

For humid situations, a special moisture solution for the circuit breakers is advised. Fungus and mold, which are renowned for ruining systems, can be helped by treating circuit breakers. Space heaters are frequently utilized in enclosures in high-humidity situations.

Corrosion wreaks havoc on circuit breaker components, resulting in malfunctioning systems. If they must be utilized in corrosive environments, specialized corrosion-resistant versions should be employed.

High Shock Probability

Electrical shocks are a common occurrence in several workplaces. Anti-shock mechanisms should be put in this scenario to avoid any disasters.

Anti-shock devices are made up of inertia counterweights that are attached to the poles that support the trip bar. The thermal or magnetic trip units, on the other hand, should not be affected by this weight.

Maintenance Difficulty

When selecting a circuit breaker, it’s also important to examine the circuit breaker’s maintenance needs. Circuit breakers with low maintenance requirements should be considered. If you need to perform circuit breaker maintenance, it should be simple and inexpensive.

Because the closed device is protected from dust, mildew, moisture, and filth, molded circuit breakers are dependable. In comparison to open models, enclosed models require less upkeep. To avoid overheating and breakage, some circuit breakers must be cleaned on a regular basis; as a result, the breakers should be able to open freely for maintenance.

Safety

Indoor circuit breakers are intended for use in secure enclosures. Buildings should have these breakers installed to protect them from the elements. Medium-voltage circuit breakers are controlled by metal-clad switchgear enclosures.

Outdoor circuit breakers, on the other hand, do not need any shielding or roofing. In comparison to their indoor counterparts, they have more robust enclosure structures. They are employed in more complicated power systems since they are not impacted by wear and tear.

Every electrical circuit requires circuit breakers. Always exercise caution when working with electricity and remember to turn off the breaker before beginning any electrical work. Also, make sure you’re using the right sort of breaker for the circuit.