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Texte wiki de la nouvelle page, après la modification (new_wikitext) | '<br>If you are in the market for a new busbar or have just replaced your existing busbars with newer ones, then you need to understand the busbar rating of the busbars you are considering. A busbar rating is a mathematical formula that determines the electrical and mechanical properties of a busbar based on its length, width and bending load capacity. Most manufacturers of busbars develop and maintain their own rating tables that are used to determine the strength and compatibility of their busbars in outdoor application. The actual formula used is complicated and not easily understood by the average person, so most manufactures simplify the calculation to get a quick answer. The result is usually not what you want so it's best to use a busbar rating calculator that is designed specifically for outdoor busbars.<br><br><br>Most busbars that are used in the construction industry come with an outdoor rating that specifies the maximum voltage that the busbar can withstand and still maintain its integrity, flexibility and effective performance under all weather conditions. To get this information you will need to read the fine print of the [https://www.rhibusbar.com/product/product_137_1.html busbar rating table] that is supplied with your busbar. Most manufacturers use a single number, E or A, to denote the maximum voltage they can safely handle. If the busbar is rated E/A then it will be safe to operate in any climate where temperatures do not exceed those specified. If the busbar rating table does not specify a maximum operating temperature, then it is safe to assume that it can handle up to and beyond 500 degrees Fahrenheit but it is prudent to only operate it in areas that have a natural insulation value (temperature that your heater would be capable of sustaining without getting uncomfortably hot).<br><br><br>The next thing you need to know is what the individual components in your busbar can tolerate. There are many different elements in a busbar that affect its durability including, thermal resistance, galvanic corrosion, chemical resistance and the current rating. The higher the current rating, the more resistive it is to damage from the physical forces associated with electrical current. Busbars with a high current rating can withstand a tremendous amount of thermal impact, which is great if you are using copper busbars in a thermal controlled environment like a bus garage.<br><br><br>Another important aspect to consider is the mechanical properties of the busbars as well as their bending strength. As stated above, copper busbars have very high thermal conductivity and are also very bendable. This makes them very attractive for use with cable couplers and in cable assembly applications such as in electric storage battery chargers, remote door opener switches, etc. However, these features also make them highly susceptible to damage. In order to reduce the effects of bending and to extend the life of your busbars, it is imperative to use only solid brass or steel parts in your busbar wiring or cable assembly.<br><br><br>The third aspect that should be considered in a busbar table is the ampacity. The idea behind any busbar is to allow the current carrying capacity of the current to be calculated directly against the busbar diameter. It is imperative to use high quality busbars in order to increase the carrying capacity of the current, but at the same time make sure that the copper rim has adequate thickness. It is important to use the appropriate amount of insulation within the wire according to the electrical load in order to maximize the electrical performance and to reduce the risk of short-circuit in your system. Using a busbar with a low capacity will significantly reduce the current carrying capacity and short-circuit potential, while using a busbar that is too small will reduce the ability of the system to handle high current loads and may even increase the risk of short-circuit as well.<br><br><br>The fourth factor to consider in your busbar and wire selection process is the cold-cranking amps. Cold-cranking amps determine the power dissipated across the conductors when cold; it is usually indicated on the wiring diagrams as CSA or measured in milliamps. A higher CSA means higher cold-cranking amps. There is a relationship between the hardness of the copper wire and its copper CSA rating. It is advisable to choose a wire with a higher CSA rating than the busbar that is selected for your application. Copper wire with a lower CSA rating is more susceptible to heat dissipation and can lead to increase in power dissipation along with an increase in thermal resistance.<br>' |
