KVH Industries TracPhone FB250 Installation Manual page 64

Chapter 3: Connecting power
Example:
Ship supply voltage: 12 V DC
Ship source impedance (measured): 50 mΩ
2
Extension cable type: 4 mm (AWG 11)
85 mΩ - (50 mΩ + 10 mΩ)
Max. cable extension = 0.5 x 4 mΩ/m = 3.12 m
In this case, the power cable can be extended with up to 3.12 m.
If you need more length, you can double the maximum allowed length by
connecting two cables in stead of one, or you can use a cable with a larger
diameter.
Power cable selection 51