B&S GAUGE 22 20 18 16 14 12 10based on 0.5 volt drop. Composite and wood/cloth airplanes double distance for ground. Subtract 10% from current capacity for operation at 120F.milliohms/ft @68F 16.1 10.1 6.4 4.0 2.5 1.6 1.0
max fuse size (Amps, 7' max) 5 7 10 15 20 25 35 max Amps, 15' 2.1 3.3 5.2 8.3 13 20 33 max Amps, 20' 1.6 2.5 3.9 6.2 10 15 25 max Amps, 25' 1.2 2 3 5 8 12 20 max Amps, 30' 1 1.6 2.5 4 6.6 10 16 max Amps, 35' 0.9 1.4 2.2 3.5 5.7 8.9 14 max Amps, 40' .78 1.2 1.9 3.1 5 7.8 12 max Amps, 45' .69 1.1 1.7 2.7 4.4 6.9 11
Make sure your wires can handle the max capacity of the breakers to which they are connected. The whole point of breakers is to protect you from the smoking insulation of overheated wires (not to mention a subsequent fire), not to protect the devices at the end of the line. I sized my breakers to be at least 25% larger than the total of the devices they protect, and the wire the next size larger. My breakers are combination switch/breakers, made by Carlingswitch (see www.pocosales.com), but no longer sell in small quantities like my instrument panel. Newark sells the 5A and 10A version though. Potter Brumfield makes a nice one too (see AS&S catalog for only $13 or so) but it has a cheesy looking translucent orange rocker. The Carlingswitch rockers come in a multitude of configurations and colors, if you can find a supplier that will sell in small quantities. I highly recommend them.
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