
A speaker wire with a gauge of 14 can support up to 30 watts. You must be referring to a 14 gauge speaker WIRE, I suppose. Furthermore, based only on the wire's current capacity, a typical 14 AWG copper conductor has a maximum continuous rating of 25 A. The maximum power while feeding an 8 ohm load is I^2R, or 25 * 25 * 8 = 5,000 watts.
For 100 Amp Service, standard wire sizes are 4 AWG or 2 AWG for copper wiring and 2 AWG, 1 AWG, or 1/0 AWG for copper-clad or aluminum wiring. Direct burial is another application for these sizes.
For a 60 Amp circuit breaker, 4 AWG copper or 3 AWG aluminum wire diameters are ideal. At 75°C, the 4 AWG copper wire has a capacity of 85 amps. At 75°C, the 3 AWG aluminum wire has a 75 amp capacity.
There are several general guidelines that people can abide by. For example, while some audiophiles use more sophisticated calculations to determine what they'll install, others prefer to stick with 14 gauge and lower for anything more than 50 feet. Recall that sound quality is never truly harmed by thicker wire.
Generally speaking, resistance exceeds 5% of the speaker's impedance at which point it begins to affect the speaker's performance. Two important factors that influence resistance are the wire's cross sectional area and length. The wire will have less resistance the shorter it gets.
DescriptionWire Gauge: 2 Ohms to 4 Ohms12 Feet 24 Feet 16 Gauge20 Feet 40 Feet 14 Gauge30 Feet 60 Feet* 12 Gauge* Ten Gauge, fifty feet, hundred feetThree additional rows
Gauge Conversion of WireA.W.G. or B&S (Inches) as the wire number (gauges) Metric (MM) A.W.G.7 0.1443" or 3.665 mm8.0.2855" 3.264 mm9 0.1144" or 2.906 mm10 0.1019" or 2.588 mm
If the gauge or thickness of the speaker wire is suitable for the power of the device, you can use it for 12 volts. Speaker wire with a gauge of 18 or 16 is appropriate for low-voltage applications such as 12 volts since it can carry up to 7 or 10 amps of current, respectively.
Additionally, the wire can safely carry more current (amperage) before overheating the larger the cross-section. More power can be carried by a wire with a smaller gauge (bigger diameter) than by one with a larger gauge. A lower AWG number is often preferable over a greater AWG.
Indeed. Make clean joints and use wire of the same size. Depending on the situation, adding more than a few dozen feet could be problematic. It won't have any effect on the sound.