Amperage is the measure of electricalĬurrent flowing through a circuit. Wire for many different applications can become complex and overwhelming. Wire to prevent overheating, fire and other dangerous conditions.
170FT 200 AMP SERVICE WIRE SIZE CODE
The National Electrical Code provides requirements for sizing electrical Source: NFPA 70, National Electrical Code, Table 310.15(B)(16-17) Conductor Sizing Always use the total length of the circuit for calculations.Ĭonsult with an engineer if your application requires more complex calculations. Note: It's recommended to check the ampacity of a wire after doing a voltage drop calculation. It is recommended not to exceed a voltageĭistance - Enter the one-way length of the wires in the circuit in feet. Voltage Drop - Choose the maximum percentage of the source voltage drop. In a cable, burried in the Earth, or in open air. This is typically in a raceway (cable-tray or conduit), Installation - Choose the installation method for the circuit. Common conductors are copper and aluminum. Insulation - Select the thermal rating of the insulation on the wire.Ĭonductor - Choose the material used as a conductor in the wire. To calculate ground wire size, use the Ground Wire Size Calculator. For three-phase circuits, four wires are required. Single-phase circuits, three wires are required. This is typically single-phase or three-phase. Phases - Select the number of phases in the circuit.
To multiply the nameplate FLA by 1.25 for wire sizing.
While three-phase voltages are typically 208V, 230V or 480V.Īmperes - Enter the maximum current in amps that will flow through the circuit. Single-phase voltages are usually 115V or 120V, Voltage - Enter the voltage at the source of the circuit.
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