Electrical

Check extension cord watts, amps, voltage drop, and the safe limit from cord length, AWG, voltage, and amp rating.

Check extension cord amps, voltage drop, and AWG size for a load, length, and outlet rating.

Check outlet circuit load with watts or amps, including long-running loads, short-use loads, breaker size, and room left.

Check kitchen appliance watts against breaker amps, volts, long-run loads, and common small-appliance circuit cautions.

Check appliance watts or amps against a breaker, including 120/240 V, 3-hour loads, headroom, and breaker comparison.

Estimate natural gas generator fuel cost from gas use, run time, bill unit, heat content, and grid electricity price.

Estimate propane generator runtime from tank size, fill, fuel use, watts, reserve, daily run hours, and propane price.

Estimate whole house generator kW from running watts, starting surge, extra room, derating, voltage, and common sizes.

Estimate generator fuel cost, fuel needed, runtime coverage, and fuel left after reserve using a manual rate or size-and-load estimate.

Choose generator extension cord AWG by load, length, voltage drop, and run time. Check a cord you already own.