Construction Monkey

Wire Properties

Improve Estimates With Productivity Data From the Field

Specific Wire Properties

Instructions

The Construction Monkey Conductor calculator lets you figure out electrical characteristics of wires including the ampacity, circular mills, area, resistance, reactance, impendance, conduit fill, and voltage drop.

Make your selections below and the form will automatically update the values.

Conductor

Full Conductor Properties
Ampacity1
Circular Mills
Outside Diameter
Area
Reactance3
Resistance3
Impedance2

Conduit Properties

Voltage Drop

Max Voltage Drop Max Length
2% Voltage Drop
3% Voltage Drop
5% Voltage Drop
feet
amps
Good design practices limit wire ampacity due to over current to 80% of rated ampacity under most circumstances.
The wire size will not be able to handle this load and it will cause catastrophic failures.
Good design requirements should limit overall voltage drop to less than 5%.

Notes:

1Ampacity based NEC Table 310-16, which is based on three (3) current carrying conductors at 30 degrees Celsius Ambient
2Calculations based on 0.85 Power Factor
3Based on NEC Table 9
4Check Conductor derating Factors for more than three (3) current carrying conductors
5Load for Voltage Drop is calculated based on 80% ampacity load of maximum allowable ampacity

Related Calculators

Circtuits/Feeders

Power/Amps/Voltage Feeder/Voltage Drop Motors Transformers

Conduits

Conduit Tables Conduit Fill Tables Conduit Size Selector Duct Bank

Conductors

General Wire Properties Specific Wire Properties Conductor Insulation Tables

Miscellaneous

Box Fill Calculations Optional Residential

Manpower/Productivity

Manpower Projections Productivity Changes Hour Estimator

Improve Estimates With Productivity Data From the Field

Combining the data across multiple projects, you can understand trends and update your estimating database to reflect actual productivity measures or to ensure your next project has enough hours to be successful.

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No guarantees are made as to the accuracy of the calculation or compliance with local codes.  Verify all calculations with a professional engineer. If you find an error, or have a suggestion, please send us an email.

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