Select Phase System to See Voltage
Select a load input type above
Fill in the required inputs below to instantly generate breaker size, conductor size, EGC size, raceway size and maximum circuit length.
Enter the conductor details and select a conduit type to calculate fill percentage and required conduit size.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
No items added
No items added
No items added
No items added
No items added
No items added
No items added
Enter the square footage of the building to calculate the required electrical service size based on building load.
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Primary Voltage to See Secondary Options
Fill in the required inputs below to instantly generate protection, conductor, EGC, bonding jumper, and raceway sizes for both primary and secondary sides.
Select Phase to See Voltage
Fill in the required inputs below to calculate the voltage drop across your circuit based on conductor size, load, and cable length.
Select Phase to See Voltage
Fill in the required inputs below to calculate the maximum circuit distance allowed before voltage drop exceeds your limit.
Select Phase to See Voltage
Fill in the required inputs below to calculate the minimum conductor size needed to stay within your voltage drop limit.
Select Phase System to See Voltage
Select a load input type above
Fill in the required inputs below to instantly generate breaker size, conductor size, EGC size, raceway size and maximum circuit length.
Enter the conductor details and select a conduit type to calculate fill percentage and required conduit size.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
No items added
No items added
No items added
No items added
No items added
No items added
No items added
Enter the square footage of the building to calculate the required electrical service size based on building load.
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Primary Voltage to See Secondary Options
Fill in the required inputs below to instantly generate protection, conductor, EGC, bonding jumper, and raceway sizes for both primary and secondary sides.
Select Phase to See Voltage
Fill in the required inputs below to calculate the voltage drop across your circuit based on conductor size, load, and cable length.
Select Phase to See Voltage
Fill in the required inputs below to calculate the maximum circuit distance allowed before voltage drop exceeds your limit.
Select Phase to See Voltage
Fill in the required inputs below to calculate the minimum conductor size needed to stay within your voltage drop limit.
Select Phase System to See Voltage
Select a load input type above
Fill in the required inputs below to instantly generate breaker size, conductor size, EGC size, raceway size and maximum circuit length.
Enter the conductor details and select a conduit type to calculate fill percentage and required conduit size.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
No items added
No items added
No items added
No items added
No items added
No items added
No items added
Enter the square footage of the building to calculate the required electrical service size based on building load.
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Primary Voltage to See Secondary Options
Fill in the required inputs below to instantly generate protection, conductor, EGC, bonding jumper, and raceway sizes for both primary and secondary sides.
Select Phase to See Voltage
Fill in the required inputs below to calculate the voltage drop across your circuit based on conductor size, load, and cable length.
Select Phase to See Voltage
Fill in the required inputs below to calculate the maximum circuit distance allowed before voltage drop exceeds your limit.
Select Phase to See Voltage
Fill in the required inputs below to calculate the minimum conductor size needed to stay within your voltage drop limit.
Select Phase System to See Voltage
Select a load input type above
Fill in the required inputs below to instantly generate breaker size, conductor size, EGC size, raceway size and maximum circuit length.
Enter the conductor details and select a conduit type to calculate fill percentage and required conduit size.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
No items added
No items added
No items added
No items added
No items added
No items added
No items added
Enter the square footage of the building to calculate the required electrical service size based on building load.
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Primary Voltage to See Secondary Options
Fill in the required inputs below to instantly generate protection, conductor, EGC, bonding jumper, and raceway sizes for both primary and secondary sides.
Select Phase to See Voltage
Fill in the required inputs below to calculate the voltage drop across your circuit based on conductor size, load, and cable length.
Select Phase to See Voltage
Fill in the required inputs below to calculate the maximum circuit distance allowed before voltage drop exceeds your limit.
Select Phase to See Voltage
Fill in the required inputs below to calculate the minimum conductor size needed to stay within your voltage drop limit.
Select Phase System to See Voltage
Select a load input type above
Fill in the required inputs below to instantly generate breaker size, conductor size, EGC size, raceway size and maximum circuit length.
Enter the conductor details and select a conduit type to calculate fill percentage and required conduit size.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
No items added
No items added
No items added
No items added
No items added
No items added
No items added
Enter the square footage of the building to calculate the required electrical service size based on building load.
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Primary Voltage to See Secondary Options
Fill in the required inputs below to instantly generate protection, conductor, EGC, bonding jumper, and raceway sizes for both primary and secondary sides.
Select Phase to See Voltage
Fill in the required inputs below to calculate the voltage drop across your circuit based on conductor size, load, and cable length.
Select Phase to See Voltage
Fill in the required inputs below to calculate the maximum circuit distance allowed before voltage drop exceeds your limit.
Select Phase to See Voltage
Fill in the required inputs below to calculate the minimum conductor size needed to stay within your voltage drop limit.
Select Phase System to See Voltage
Select a load input type above
Fill in the required inputs below to instantly generate breaker size, conductor size, EGC size, raceway size and maximum circuit length.
Enter the conductor details and select a conduit type to calculate fill percentage and required conduit size.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
No items added
No items added
No items added
No items added
No items added
No items added
No items added
Enter the square footage of the building to calculate the required electrical service size based on building load.
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Primary Voltage to See Secondary Options
Fill in the required inputs below to instantly generate protection, conductor, EGC, bonding jumper, and raceway sizes for both primary and secondary sides.
Select Phase to See Voltage
Fill in the required inputs below to calculate the voltage drop across your circuit based on conductor size, load, and cable length.
Select Phase to See Voltage
Fill in the required inputs below to calculate the maximum circuit distance allowed before voltage drop exceeds your limit.
Select Phase to See Voltage
Fill in the required inputs below to calculate the minimum conductor size needed to stay within your voltage drop limit.
Select Phase System to See Voltage
Select a load input type above
Fill in the required inputs below to instantly generate breaker size, conductor size, EGC size, raceway size and maximum circuit length.
Enter the conductor details and select a conduit type to calculate fill percentage and required conduit size.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
No items added
No items added
No items added
No items added
No items added
No items added
No items added
Enter the square footage of the building to calculate the required electrical service size based on building load.
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Primary Voltage to See Secondary Options
Fill in the required inputs below to instantly generate protection, conductor, EGC, bonding jumper, and raceway sizes for both primary and secondary sides.
Select Phase to See Voltage
Fill in the required inputs below to calculate the voltage drop across your circuit based on conductor size, load, and cable length.
Select Phase to See Voltage
Fill in the required inputs below to calculate the maximum circuit distance allowed before voltage drop exceeds your limit.
Select Phase to See Voltage
Fill in the required inputs below to calculate the minimum conductor size needed to stay within your voltage drop limit.
Select Phase System to See Voltage
Select a load input type above
Fill in the required inputs below to instantly generate breaker size, conductor size, EGC size, raceway size and maximum circuit length.
Enter the conductor details and select a conduit type to calculate fill percentage and required conduit size.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
No items added
No items added
No items added
No items added
No items added
No items added
No items added
Enter the square footage of the building to calculate the required electrical service size based on building load.
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Primary Voltage to See Secondary Options
Fill in the required inputs below to instantly generate protection, conductor, EGC, bonding jumper, and raceway sizes for both primary and secondary sides.
Select Phase to See Voltage
Fill in the required inputs below to calculate the voltage drop across your circuit based on conductor size, load, and cable length.
Select Phase to See Voltage
Fill in the required inputs below to calculate the maximum circuit distance allowed before voltage drop exceeds your limit.
Select Phase to See Voltage
Fill in the required inputs below to calculate the minimum conductor size needed to stay within your voltage drop limit.
Select Phase System to See Voltage
Select a load input type above
Fill in the required inputs below to instantly generate breaker size, conductor size, EGC size, raceway size and maximum circuit length.
Enter the conductor details and select a conduit type to calculate fill percentage and required conduit size.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
No items added
No items added
No items added
No items added
No items added
No items added
No items added
Enter the square footage of the building to calculate the required electrical service size based on building load.
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Primary Voltage to See Secondary Options
Fill in the required inputs below to instantly generate protection, conductor, EGC, bonding jumper, and raceway sizes for both primary and secondary sides.
Select Phase to See Voltage
Fill in the required inputs below to calculate the voltage drop across your circuit based on conductor size, load, and cable length.
Select Phase to See Voltage
Fill in the required inputs below to calculate the maximum circuit distance allowed before voltage drop exceeds your limit.
Select Phase to See Voltage
Fill in the required inputs below to calculate the minimum conductor size needed to stay within your voltage drop limit.
Select Phase System to See Voltage
Select a load input type above
Fill in the required inputs below to instantly generate breaker size, conductor size, EGC size, raceway size and maximum circuit length.
Enter the conductor details and select a conduit type to calculate fill percentage and required conduit size.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
No items added
No items added
No items added
No items added
No items added
No items added
No items added
Enter the square footage of the building to calculate the required electrical service size based on building load.
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Phase System to See Voltage
Fill in the required inputs below to instantly generate protection size, conductor size, EGC size, raceway size and maximum circuit length.
Select Primary Voltage to See Secondary Options
Fill in the required inputs below to instantly generate protection, conductor, EGC, bonding jumper, and raceway sizes for both primary and secondary sides.
Select Phase to See Voltage
Fill in the required inputs below to calculate the voltage drop across your circuit based on conductor size, load, and cable length.
Select Phase to See Voltage
Fill in the required inputs below to calculate the maximum circuit distance allowed before voltage drop exceeds your limit.
Select Phase to See Voltage
Fill in the required inputs below to calculate the minimum conductor size needed to stay within your voltage drop limit.
Circuit Calculations
Size conductors, breakers, and raceways for any branch circuit or feeder. Includes automatic voltage drop calculations and equipment grounding conductor sizing.
Try Circuit Calculator ->
Load Calculator
Complete dwelling unit load calculations following NEC Article 220. Size service conductors and calculate demand loads for residential installations.
Try Load Calculator ->
Conduit Fill
Determine minimum conduit size based on conductor count and type. Supports all common conductor insulations and raceway types per NEC Chapter 9.
Try Conduit Calculator ->
Transformer Calculator
Complete primary and secondary sizing for single-phase and three-phase transformers. Includes protection, conductors, bonding jumpers, and raceways.
Try Transformer Calculator ->
Motor Calculator
Get proper breaker and fuse sizing for single-phase and three-phase motors from 1/6 HP to 10 HP. Includes conductor sizing and both breaker and fuse options.
Try Motor Calculator ->
Voltage Drop
Three specialized calculators: find minimum conductor size for a given length, calculate maximum circuit length for a conductor size, or determine actual voltage drop percentage.
Try Voltage Drop Calculator ->
Cooling & Heat Pump Calculator
Size circuits for air conditioning or heat pump equipment using nameplate MCA and MOCP values. Handles single-phase and three-phase systems.
Try Cooling & Heat Pump Calculator ->
Resistive Heating Calculator
Calculate circuits for electric heating equipment including baseboard heaters and unit heaters, based on nameplate ratings. Handles single-phase and three-phase systems.
Try Resistive Heating Calculator ->
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