Not a problem for a really thick cables. Most of trolling motors have circuit breakers in 55-60A range. If this value is lower than your desired current, then use thicker wire. Calculating Line-Losses If you would like to calculate the correct size of wire for your renewable energy system or otherwise visit our page on. In case you have a gauge number that goes beyond 40, you will enter it in the second field.
Keep in mind that metal resistance increases with temperature, not by much, but if you can't hold your trolling motor cables in your hands due to the heat, decrease the power and get thicker cables as soon as possible. Trolling motors usually have shorter cables. Even 'Resistivity Temperature Coefficient' depends on a temperature, but it is constant in this calculation. Enter Current: A Default value is 5%. Amazon and the Amazon logo are trademarks of Amazon.
We have really tried to verify data on this page and not only on this page ; please read our. Power Loss: W Power transferred from battery to the electric motor or any other electric load. You will also get the cross sectional area in square millimeters which is calculated automatically with the diameter in millimeters. The diameter of the gauge number 36 is 0. Current U 5% Drop, 10m 2x5m Wire: This is calculated maximum current trough 10m wire 2x5m cable at given voltage, with allowed 5% drop loss of voltage.
Again, these are calculated values for 10m 33 feet wire - 2x5m 2x16 feet cable. If this value is lower than your desired current, then use thicker wire. Other materials can be used as well, but most of the time, wires are made out of copper. There you should find all of the equations and information you need about selecting wire to match the voltage, current, and length of wire required in your system. Anyway, always check manuals for any given device and if in doubt for some reason, use thicker cables. The gauge number is more than 40 and hence you will enter the value in the blank text field.
Actuall Voltage Drop: V Lost power in a wire - this is heat loss and leads to further increase in wire temperature and thus, increased resistance. Calculator assumes 'ideal' battery - no changes in nominal voltage with temperature and discharge current and internal resistance of the battery is assumed zero! If this value is larger than maximum allowed voltage drop, then use thicker wire. This converter has two text fields and control buttons that are used to execute different actions during the calculations. Engine starters operate for few seconds only, but draw huge currents, and their cables are much thicker. Diameter in inches: in Diameter in mm of given wire. Aluminum is not commonly found on boats and ships. To convert inches to mm divide by 0.
Also, voltage drop and power losses depend on the cable length, thickness and current flowing through the cable. This is calculated voltage drop on the cable - calculator doesn't take into account losses due to battery resistance and resistance in connectors. Pure copper cable has resistivity coefficient of 1. Remember, this is 10m wire or 5m cable with two wires. If this value is larger than maximum allowed voltage drop, then use thicker wire.
Enter wire size or diameter: Default value is 'Wire Copper' - mostly used in cables and wires and that is usually pure electrolytic copper, but heat treated. It executes the conversions within a single click displaying the result in millimeters mm. Maximum Allowed Voltage Drop %: % Diameter in inches of given wire. Keep in mind that longer cable, at the same power loss, will generate less heat per meter of the cable. If you can hold a cable with bare hand for about 5-6 seconds, then temperature of that cable is around 55-60°C 130 - 140°F. Very thick cables are used for engine starters and they draw several hundred Amperes. If there is need for more power, current is kept below 60A and voltage is increased from 12V to 24, 36 or even more volts.
. If you double the length of the cable, you should use cable that has half the resistance to keep voltage and power losses at the same level. Bow and stern thrusters usually tolerate larger voltage drops although, these losses should be avoided, if possible , but they usually operate for shorter period of time, when compared with electric trolling motors. Above 120°C 393 K, 248F , insulation starts to melt down. Select wire material: Select Resistivity coefficient of chosen material. Wire cable is a vital component of any renewable energy system.
Long story short - don't go cheap on wires and cables. As an Amazon Associate, we earn from qualifying purchases. Keep in mind that trolling motors usually have shorter cables and they usually tolerate 5% voltage drop on cables. Deep Cycle Marine Battery www. . .