Originally Posted by landonshaw
I am replacing the mast light with a light that has a strobe, anchor, and tricolor so will need 4 wires
Depending how much room you have in the conduit, you should consider replacing the incadescent bulbs in the tricolor/anchor light with LEDs. This would allow you to use much smaller gauge wires. Also, there are significant differences in the outer diameter of cables
of different brands. For example, apparently Ancor cable is smaller diameter than Pacer cable with the same number of wires/gauges.