Extension Cord Gauge and Length Safety Chart
Find recommended extension cord AWG by nameplate amps and cord length for 120 V household loads.
Recommended copper extension cord gauge (AWG) for 120 V household circuits, by the tool/appliance's nameplate amp draw and cord length. Thicker cords (lower AWG number) reduce voltage drop and overheating risk on long runs.
About this tool
Extension Cord Gauge and Length Safety Chart is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Electrical & Electronics. Browse more Electrical & Electronics tools.