What Size Wire for a 20 Amp 120V Circuit?
Standard 20 amp circuits are commonly used for kitchen countertop outlets, bathroom outlets, and general-purpose receptacles. Proper wire sizing ensures safe operation and code compliance.
Results
Need to adjust these values? Use the full calculator:
Open Full CalculatorRelated Calculations
30 Amp 240V Wire Size for Dryer (Copper)
Determine the correct wire gauge for a 30 amp 240V electric dryer circuit using copper conductors.
40 Amp 240V Wire Size for Range (Copper)
Calculate the proper wire gauge for a 40 amp 240V electric range or stove circuit with copper wire.
50 Amp 240V Wire Size (Copper)
Find the correct wire gauge for 50 amp 240V circuits including EV chargers, ranges, and sub-panels using copper conductors.
60 Amp 240V Sub-Panel Wire Size (Copper)
Calculate the proper wire size for feeding a 60 amp sub-panel with copper conductors.
100 Amp 240V Sub-Panel Wire Size (Copper)
Determine the correct wire gauge for a 100 amp sub-panel feeder using copper conductors.
200 Amp 240V Main Service Wire Size (Copper)
Calculate the proper wire size for a 200 amp main service entrance using copper conductors.