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New Releases. This is a measure of how much of the amplifier power is dissipated in the cable, before it ever gets to the loudspeaker. The lower the power loss, the more power actually goes into making sound. So, from the standpoint of power transmission, gauge wire is suitable for many home applications.
But for longer cable runs, the losses can be greater and you should consider changing to a larger diameter cable. Another result to note is that, for many cables, the roll-off frequency is well above 20 kHz, the upper limit of the audible frequency range. If the roll-off frequency is below 80 kHz, you might consider changing your cable to a larger diameter. Cookies that are essential for technical reasons are set on this webpage so we can provide users with our offers.
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Amplifier Ratings. Note : It's recommended to check the ampacity of a wire after doing a voltage drop calculation. Always use the total length of the circuit for calculations. Consult with an engineer if your application requires more complex calculations.
The National Electrical Code provides requirements for sizing electrical wire to prevent overheating, fire and other dangerous conditions. Properly sizing wire for many different applications can become complex and overwhelming. Amperage is the measure of electrical current flowing through a circuit. The ampacity rating of a wire determines the amperage that a wire can safely handle. In order to properly size a wire for your application, the ampacity ratings for a wire must be understood.
However, many different external factors such as ambient temperature and conductor insulation play a part in determining the ampacity of a wire. Wire ampacity is calculated in such a way as to not exceed a certain temperature rise at a particular electrical load.
The heating of a conductor can be directly attributed from its I 2 R losses in the circuit. The length of a conductor is directly proportional to its resistance. However, the cross-sectional area of a conductor can also be changed to alter the conductor's resistance. The max current that the wire can safely carry is reduced because it has less capacity to dissipate the heat generated by the current flow.
Load runs continuously for 20 minutes or more? This is to mitigate the fact that more heat builds up in the wire if the current flows continuously. Wire in conduit, insulation or bundled with 2 or more wires?
Recommended Wire. A Maximum current that a wire can carry continuously without exceeding its temperature rating.
A Corrected ampacity when taking derating factor s into account. Fuse too small. How this wire calculator works. Based on Load Current:. We compare 1. Based on fuse size:.
We find a wire gauge for which the ampacity is higher than the fuse size. We compare 2. Derating Factors:. Load runs continuously for 20 minutes or more. Wire in conduit, insulation, or bundled with 2 or more wires.
Making things easy. Wiring Diagram. Maxxfan Wire Sizing Example. Load Current. Wire Length.
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