Look up or Google this: National Electrical Code Table 310.16 This is the table you are looking for. You can find a link by following the related question below.
140 AMPS
3/0 gauge
Yes, # 4 AWG copper and 100 amps is the max.
Typically 30 amps.
The American Wire Gauge code table shows 8 gauge safe for 24 Amps, 10 Gauge for 15 Amps. If the circuit is going to be used at capacity (2400 Watts in this case), 8 or 10 gauge is the minimum, if load is constant, use 8 gauge. Voltage ability of the wire is dependent on the insulation thickness and material. So 20 amps at 120 Volts is 2400 watts of power, and 20 amps at 12 volts is 48 watts of power. Both would require the same gauge of wire, but the higher voltage would need better insulation. <<>> This is a voltage drop question. A #1 copper conductor will limit the voltage drop to 3% or less when supplying 20 amps for 500 feet on a 120 volt system.
A 4-gauge aluminum wire can typically carry up to 70-85 amps of current for general household wiring applications. It is important to always consult with local electrical codes and a professional electrician to ensure safe and compliant electrical installations.
50 amps
The amps that a four gauge wire will handle will depend with the thickness of the wire. If the wire is thin, the four gauge will handle 95 amps.
A 16 gauge wire can typically carry around 10-13 amps at 120V AC over a short distance like 25 feet. It's important to follow standard safety practices and consult with an electrician to ensure that the wire gauge is appropriate for your specific application and local electrical code requirements.
140 AMPS
In cooper electrical wire, gauge 8 means the wire size assigned by the American Wire Gauge (AWG) system. That is why you always will hear about AWG WIRE, it's not the type of wire is the gauge that we are talking about. A gauge 8 wire will be used for connections requiring from 40-45 amps to a maximum of 73 amps. (24 for power transmission). Diameter of an 8 AWG wire is 0.12849 inches. 8 AWG is solid, not stranded.
15 amps
The electrical current in a circuit is measured in amps.
The ampacity of an 8 gauge wire at 240 volts would depend on the specific type of wire and the installation conditions. Generally, an 8 gauge wire can safely carry around 40-50 amps of current. It is important to consult the National Electrical Code (NEC) and local regulations for precise guidance.
3/0 gauge
The maximum safe amperage for 14 gauge wire is typically around 15 amps in most household wiring applications. Exceeding this amperage could lead to overheating of the wire and pose a fire hazard. It's important to always verify the specific requirements with the National Electrical Code or a qualified electrician for your specific application.
50 amps