12 AWG. You can run several hundred feet.
12 gauge underground wire or if you think you will ever add any devices to this circuit use 10 gauge.
A #8 copper wire with an insulation factor of 75 or 90 degrees C is rated at 45 amps.
It depends upon the length of the circuit, but for 50 feet or less a 10 gauge wire should be fine. A short length (15 feet), you could use 12 gauge. If you double the length to 100 feet, you should use 8 gauge. A rule of thumb is to drop down a gauge for every length that is doubled. There are wire size charts available on the internet. Some can be conservative such as recommending #8 for 50 ft or less at 30 amps. It is better to be conservative than to run too much amperage on a smaller wire that can cause a fire. As a general rule, 12ga wire can be used in house circuits for 20amps or less. 16ga wire can be used for 15 amps or less such as lighting circuits. That is considering lengths of less than 100 feet.
14-3 Is the standard wire use for residental smoke detectors.
4 gauge
This is a voltage drop question. To answer this question a voltage must be stated.
The maximum distance a 12 gauge electrical wire can run depends on the voltage and amperage of the circuit it is serving. In a typical residential circuit with 120 volts and 20 amperes, a 12 gauge wire can run up to 60 feet before voltage drop and overheating become concerns. It is always best to consult local electrical codes and standards for specific guidance on wire length limitations.
12 AWG. You can run several hundred feet.
12 gauge underground wire or if you think you will ever add any devices to this circuit use 10 gauge.
This is a voltage drop question. To answer this question a voltage must be stated.
The size of wire needed for a trolling motor depends on the motor's maximum amperage draw and the length of the wire run. A general guideline for a 12V trolling motor is 6-gauge wire for runs up to 10 feet, 4-gauge wire for runs up to 20 feet, and 2-gauge wire for runs over 20 feet to minimize voltage drop and ensure proper performance. Be sure to consult the manufacturer's recommendations for your specific trolling motor.
No, you can never mix wire sizes in a circuit.
A 120-volt water heater should not be run over a 14-gauge wire at 300 feet. The voltage drop over such a long distance would be significant, potentially causing the water heater to not function properly or even become a safety hazard. It is recommended to use a larger gauge wire or locate the heater closer to the power source.
For a 40 amp 220 volt circuit run 60 feet in a residence, it is recommended to use a #8 AWG copper wire for the wiring. This will ensure that you have a safe and efficient electrical connection for your circuit.
For a 30 amp circuit running 100 feet, you would typically need to use at least a 10-gauge wire to ensure safe and efficient electrical flow. It's important to consult local building codes and regulations to ensure compliance.
For a 50 amp service over a 145 feet distance, it is recommended to use a 6 gauge wire to ensure proper voltage drop and safety. This wire size will help reduce resistance and prevent overheating of the circuit. Be sure to consult with a licensed electrician to confirm the appropriate wire size for your specific installation needs.