the higher the AWG size, the lower the ampacity and vise versa. In short, the ampacity is inversely proportional to the size of AWG integers (from 0000AWG to 40AWG) e.g. For example, the 14AWG size is a suitable wire for a 15Amp circuit breaker, whereas the 8AWG size is most appropriate for 40Amps of circuit breakers and load points. One thing should be noted about the AWG that the larger the integer, the smaller the thickness and diameter of wire. One of the most important roles of American Wire Gauge is to measure the current carrying capacity in Amps of wire (aka Wire Ampacity = The amount of maximum current that a conductor can carry continuously without exceeding its temperature rating. This table is for 12-Volt systems only.The AWG is used to exactly measure the diameter of a particular conductor (such as solid, stranded, round and non-ferrous (alloys or metals that do not contain any appreciable amounts of iron) materials e.g. Remember that the Length is a round-trip distance. Use 10% voltage drop for non-critical applications such as windlass, cabin lights, circuits other than running lights, electronics or panel board feeds. Use 3% voltage drop for critical applications affecting the safety of your boat and crew, such as running lights, blowers, electronics and panel board feeds. If 7–24 conductors are bundled, reduce amperage by 50 percent. If 4–6 conductors are bundled, reduce maximum amperage by 40 percent.
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