As an expert in the field of electrical engineering, I understand the importance of selecting the correct wire size for an inverter to ensure safety and efficiency. When it comes to a 1500 watt inverter, the wire size you choose will depend on several factors, including the inverter's voltage, the length of the wire run, and the current the inverter will draw.

Firstly, it's essential to know the voltage of the inverter. Common inverter voltages are 12 volts, 24 volts, and 48 volts. The higher the voltage, the lower the current that will flow through the wire for the same power output, which can result in smaller wire sizes being suitable.

The next critical factor is the continuous watts, which in your case is 1500 watts. To determine the current draw, you would divide the power in watts by the voltage of the inverter. For example, for a 12-volt inverter, the current draw would be \( \frac{1500}{12} \), which is approximately 125 amps.

Now, considering the wire size, the American Wire Gauge (AWG) is used to determine the wire's capacity to handle current. The lower the AWG number, the thicker the wire, and the more current it can safely carry. For a 1500 watt inverter at 12 volts, you would need a wire that can handle approximately 125 amps. According to the National Electrical Code (NEC) and various wire sizing charts, a wire size of 2/0 AWG would be suitable for such a high current draw over short distances. However, if the wire run is longer, you may need to consider a larger wire size to account for voltage drop and ensure the wire remains within its safe operating temperature.

It's also important to consider the ambient temperature and whether the wire will be in an enclosed space, as this can affect the wire's ability to dissipate heat. Additionally, the wire should be properly insulated to prevent any electrical hazards.

When selecting a breaker or fuse, it should be rated for the maximum current the wire can safely carry. For a 2/0 AWG wire, a breaker or fuse rated for 125 amps would be appropriate.

In summary, for a 1500 watt inverter, especially at 12 volts, a 2/0 AWG wire would generally be the minimum recommended size for short distances. Always consult with a professional electrician or refer to the latest electrical codes for specific installations, as there may be additional considerations based on local regulations and the specific application.

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Recommended Inverter Cable and Breaker or Fuse SizesInverter VoltageContinuous WattsWire Size (AWG)12 Volt6002800210002/015004/017 more rowsread more >>