What minimum wire gauge is suggested for a mobile HF transceiver drawing 22 amperes?

When selecting a wire gauge for a mobile HF transceiver that draws 22 amperes, it's essential to consider both the current carrying capacity of the wire and the potential voltage drop over the length of the wire run. The American Wire Gauge (AWG) system is a standard for measuring wire sizes, with lower numbers indicating thicker wire.

For a current of 22 amperes, using a wire gauge that is too thin can lead to increased resistance, which can cause a significant voltage drop and potentially overheating of the wire. Number 8 gauge wire is generally recommended for this level of current, as it is capable of safely carrying 22 amperes over a reasonable distance.

Using number 8 wire ensures that the transceiver receives sufficient voltage while minimizing power loss and maintaining safety. It's also important to take into account the length of the run; if the distance between the power source and the radio is particularly long, a thicker wire, such as number 6, might be more suitable to further reduce voltage drop, although number 8 is the minimum generally suggested for 22 amperes.

Choosing a wire gauge that is too small, such as number 10 or higher, may not adequately support the current draw, leading to inefficiency and potential damage