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Management Technologies for the Rest of Us™
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Are you in need of electrical calculations done quickly based on
current electrical engineering practices and the National Electrical Code?
Construction Monkey has compiled several programs to assist in electrical construction,
design and engineering. We are constantly adding new calculations and improving the
existing calculations. All calculations are free to use, but please read the
Terms
of Use for more specific information.
| Calculator | Description |
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Wire Tables
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Tables of various wire properties including ampacity, diameter for various
insulation types, and impedance and resistance values.
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Conduit Tables
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Tables of various conduit properties including interior and exterior diameters for
various types of electrical conduit.
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Conduit/Wire Tables
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Tables of various wire/conduit properties including fill quantities for various
sizes and types of conduit and wire.
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Power/Amps/Voltage
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Calculates ampacity or power or voltage of a circuit. It also calculates the wire size for the circuit calculated.
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Conductor Properties
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Gives all the applicable information for different types of conductors in
different conduits.
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Optional Residential
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Calculates the service size for a single residential unit utilizing the
NEC optional method.
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Feeder/Voltage Drop
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Calculates the wire and conduit size for various feeders and circuits. It also calculates
the voltage drop and allows you to limit the voltage drop so the feeder size will be increased.
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Motors
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Calculates the power, ampacity, feeder, and overcurrent protection on a
specific motor size and voltage. It also calculates the voltage drop of the circuit
you specified for the feeder portion.
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Transformers
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Calculates the feeders and overcurrent protection for different types of
transformers. It also calculates the voltage drop on the primary and secondary sides of the
transformer.
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Duct Bank
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Calculates the duct bank size based on the quantity of conduits, the size and type of conduit. The
calculator let's you know the amount of dirt to remove, the amount of dirt to return,
the amount of concrete for a duct bank, and the amount of left over dirt.
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Box Fill Calculations
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Calculates the minimum cubic volume required for a device or junction boxes based on NEC 313.16.
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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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