11/28/2023 0 Comments 10 gauge wire amp ratingThe thermoplastic PVC family includes THWN-2, THW-2, THHW, and THHN. ZW-2, XHWN-2, XHWN, XHHW-2, XHHW, XHHN, Z, XHH, USE-2, THWN-2, THW-2, THHW, THHN, TBS, SIS, SA, RHW-2, RHH, PFA, MI, FEPB, FEP The NEC lists the following insulators based on the current rating of the wire, but we’ll focus on the two common materials used – thermoplastic PVC and cross linked polyethylene (XLPE). Different types of 18 gauge wireġ8 gauge wires may come with different types of insulating materials. The maximum current is established to prevent melting insulators, while the actual current flowing through the wire is affected by the voltage drop caused by wire length. Two factors may be looked at when we consider the current flowing in an 18 gauge wire – the type of insulation and the length. However, this cable size is more commonly used in low voltage applications, and if you need a cord that will handle more power, you can switch to a 16 gauge wire. So, what is 18 gauge wire good for? You can use it for up to 1680 watts at 120 volts and 3080 watts at 220 volts. To know how many watts 18 gauge wires carry, we need to look at the voltage they operate under. If the wire gets too hot, it may damage the insulation and create a fire hazard. Since the size of 18 gauge wire is only around 0.0403 inches in diameter, the US National Electric Code or NEC only rated it up to 14 amps in a raceway or 18 amps in free air at 90 degrees Celsius these levels of power should prevent the cable from getting too hot. However, the more current that passes through a wire, the hotter it gets – a fact that impacts the amp rating 18 gauge wire carry. Generally, the larger the cross-sectional area of the wire, the more current it can allow to pass through. The current rating of an 18 gauge copper wire is limited by its thickness.
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