Reference charts
13 reference charts: wire ampacity and gauge, breaker and ground wire sizes, conduit fill, voltage drop, extension cords, motor amps and appliance wattage, and the weight of landscape materials. Every value is calculated by the same tested code as the calculators, and every chart can be printed or downloaded as a PDF.
Electrical charts
- Ampacity chartAllowable amps for copper and aluminum conductors from 14 AWG to 600 kcmil at 60, 75 and 90 °C, with the small-conductor breaker limits.
- Appliance wattage chartRunning watts and amps of common household appliances at 120 and 240 V, with the breaker and circuit each one needs.
- AWG chartAmerican Wire Gauge sizes from 18 AWG to 600 kcmil: diameter in inches and millimeters, area in circular mils and mm², resistance per 1,000 ft.
- Breaker size chartLargest breaker for each wire size from 14 AWG to 600 kcmil, copper and aluminum, for NM-B cable and for 75 °C terminations.
- Conduit fill chartMaximum number of THHN wires from 14 AWG to 4/0 in EMT, PVC Schedule 40 and 80 and rigid conduit from 1/2 to 4 inches.
- Ground wire size chartMinimum equipment grounding conductor for every breaker from 15 to 1,200 amps, copper and aluminum, and how to size it on long runs.
- Extension cord gauge chartWhich extension cord gauge to use for a load from 5 to 15 amps at 25, 50, 100 and 150 feet, keeping the voltage drop within 5%.
- Generator wattage chartRunning and starting watts of household appliances and the generator size each one needs, from a refrigerator to central air.
- Motor FLA chartFull-load amps of single-phase and three-phase AC motors by horsepower and voltage, with the 125% conductor ampacity for the branch circuit.
- Voltage drop chartHow far each copper wire size can run at full load before the voltage drop passes 3%, at 120 and 240 volts.
- Wire gauge chartAWG wire sizes from 18 to 4/0 with diameter, cross-section, amps for copper NM-B cable and THHN, the largest breaker and what each size is used for.
- Wire size chartWire size for every standard breaker from 15 to 400 amps in copper and aluminum, for NM-B cable and for 75 °C terminations.