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Generally, a 20-amp circuit requires a wire gauge of at least 12 AWG (American Wire Gauge) for copper wire, or 10 AWG for aluminum wire, to ensure that the wire can handle the load without overheating or causing a fire hazard.
This wire size calculator will calculate the appropriate wire gauge for a circuit based on amps, voltage, distance, and load. This website provides a wire size calculator, voltage drop calculator, wire ampacity charts and more.
Wire Size Chart. Electrical current is measured in amps. Each wire size, or wire gauge (AWG), has a maximum current limit that a wire can handle before damage occurs. It is important to pick the correct size of wire so that the wire doesn't overheat.
Wire Size & Amp Ratings • Ampacity is the maximum current that a conductor can carry continuously under the conditions of use without exceeding its temperature rating. Current is measured in amperes or “amps.” You must use the correct size wire for the current (load) requirement of the circuit to prevent the wire from overheating.
26 gru 2023 · If we follow the NEX310-16 rule that says for copper and aluminum 20-amp wires, there is a need to increase the amp by 20 percent for each 100-foot distance. We find the 25A ampacity wire used for the 20A circuit.
Wire gauge calculator. * @ 68°F or 20°C. ** Diameter and cross sectional area do not include the insulation. *** Results may change with real wires: different resistivity of material and number of strands in wire. Voltage drop calculator .
Load Carrying Capacities (see table below) The following chart is a guideline of “ampacity”, or copper wire current-carrying capacity following the Handbook of Electronic Tables and Formulas for American Wire Gauge. As you might guess, the rated “ampacities” are just a rule of thumb.
