Circuit breakers are electrical switches that protect devices, homes and electric vehicles in case of over current/overload or short circuits. They interrupt current flow by opening their contacts when the protective relays detect an overload or arc and prevent further damage by shutting off power almost instantly.
When the operating handle of a low or medium voltage molded case circuit breaker is opened, it’s closing spring is compressed ready to rapidly re-close the contact. This safety feature helps to reduce the risk of arcing which can burn people, cause fires and destroy the insulating materials on wires and in the breaker’s housing. The breaker’s maximum voltage rating is the highest value of AC or DC that it can handle continuously without overheating. This is typically stated on the breaker’s operating handle and calibrated to a specific ambient temperature. Choosing the wrong voltage rating can result in poor performance and melted wires, which will create dangerous situations.
It is important to choose a circuit breaker with an amperage rating high enough to handle the maximum amount of current that will be drawn by devices attached to it. A low amperage rating will result in frequent tripping which can be frustrating and it may not cut off the power entirely quickly enough to prevent electrical hazards or costly damages. To figure out the right amperage rating for a circuit breaker, find the wattage of any device connected to it and look for its data plate or information label (typically on the back or underside of the device or near where the cord enters) to see what its maximum power draw is. Then, add up the amperage ratings of all the devices that will be running at any given time and compare to the breaker’s rating. Standard breakers are rated for 120 volts and 15 or 20 amps. They control the standard lighting and outlet circuits in a home. Molded case breakers are insulated to protect the current-carrying parts and mechanisms from damage.
When you’re in the market for a new circuit breaker, there are several things to look out for. The voltage rating is one of the most important factors, as it determines how much current your breaker can handle. The operating conditions are another factor, as some environments can be unforgiving on circuit breakers. For instance, high ambient temperatures can cause them to deteriorate faster. If you’re looking for a durable and reliable breaker, consider purchasing molded case circuit breakers (MCCB). These are ideal for high-voltage applications. They’re available in a wide range of frame sizes and amp ratings.
They also feature an insulated case that protects the components from accidental contact. If you’re looking for a less expensive option, opt for a tandem breaker. This type does the job of a 2-pole breaker but takes up half the space in your panel. It’s a great choice for homes with limited space. Stay in the loop about circuit breakers for sale specials – click here or visit their website.
