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Typical Resistances

Add 1 milliohm per connector contact pair (not Tamiya!).

Add 1 milliohm for good switch.

Add 2.3 milliohms for 30A fuse.

Add 4.5 milliohms for 20A fuse.

Add 1.3 milliohms per foot for #10 wire.

Add 1.5 milliohms per foot for #11 wire.

Add 1.8 milliohms per foot for #12 wire.

Add 2.3 milliohms per foot for #13 wire.

Add 2.9 milliohms per foot for #14 wire.

Add 3.6 milliohms per foot for #15 wire.

Add 4.5 milliohms per foot for #16 wire.

Add 7.2 milliohms per foot for #18 wire.

Add 1.5 milliohms per foot for 4.0 sq. mm. wire.

Add 2.4 milliohms per foot for 2.5 sq. mm. wire.

Add 4.0 milliohms per foot for 1.5 sq. mm. wire.

Check your data sheet or manufacturer for ESC resistance.