12 AWG. You can run several hundred feet.
14-3 Is the standard wire use for residental smoke detectors.
The key parameter in sizing wire is the current requirement. Once you know that you can look up value in a wire gauge table. The length of the run is important for longer runs because of the resistance of the wire itself. Aluminum wire requires a larger diameter than copper for the same current. Once you calculate the wire size you can then size the conduit.
10 AWG.
12 gauge underground wire or if you think you will ever add any devices to this circuit use 10 gauge.
12 AWG. You can run several hundred feet.
For a 250-foot run, it is recommended to use a wire gauge that is appropriate for the electrical load and voltage requirements of the circuit. Typically, for longer runs like this, a thicker gauge wire such as 10 AWG or 12 AWG may be used to minimize voltage drop and ensure proper current flow. It is important to consult local electrical codes and regulations to determine the specific wire type and gauge suitable for your application.
No, you can never mix wire sizes in a circuit.
4 gauge
For a 50-foot run with a 6.3-amp load at 240 volts, you can use 14-gauge wire as it can safely handle up to 15 amps. If you want to take into account voltage drop for longer runs, you may opt for even thicker wire like 12-gauge to minimize power loss. It's always a good idea to consult with a professional electrician for accurate recommendations.
14-3 Is the standard wire use for residental smoke detectors.
The longer the run, the bigger and heavier the wire will need to be. The AWG number denotes the diameter of the wire: the smaller the AWG number, the bigger the diameter.
The key parameter in sizing wire is the current requirement. Once you know that you can look up value in a wire gauge table. The length of the run is important for longer runs because of the resistance of the wire itself. Aluminum wire requires a larger diameter than copper for the same current. Once you calculate the wire size you can then size the conduit.
10 AWG.
It is not recommended to connect a 14 gauge wire to a 12 gauge wire on a 20 amp breaker, as this can create a safety hazard. It's important to match the wire gauge to the circuit breaker rating to prevent overheating and potential fire hazards. It would be best to run a continuous 12 gauge wire for this circuit.
For low voltage wiring, typically smaller gauge wire is used, such as 18 or 20 gauge. The specific gauge will depend on the current requirements of the circuit and the distance the wire needs to run. It's important to consult the manufacturer's recommendations or local building codes to determine the appropriate wire gauge for your application.
10 gauge wire will only run up to 30 amps