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Wireway Fill Calculator
Fill at 20% of cross-section per NEC 376.22 with verdict. 3 inputs, 3 outputs.
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Electrical calculators
Load and power, wire and voltage drop, motors and protection, 24V control power, heat, lighting, backup, and raceway, each with visible math.
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Pull Box Sizer
Minimum length per NEC 314.28 for straight and angle pulls. 3 inputs, 1 output.
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Transformer Inrush Estimator
First-cycle inrush at 10x FLA, single or three phase. 3 inputs, 2 outputs.
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Transformer K-Factor Selector
K rating from nonlinear share stepped to K-1 through K-30. 1 input, 2 outputs.
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Generator Sizer
Genset kVA from running kW plus 6x largest-motor starting kVA. 2 inputs, 3 outputs.
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Motor Disconnect Sizer
Disconnect at 115% FLA per 430.110(A) to a standard switch size. 2 inputs, 3 outputs.
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Motor Locked-Rotor Current Calculator
Starting amps from HP and code letter per 430.7(B) with FLA multiple. 3 inputs, 2 outputs.
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Main Bonding Jumper Sizer
Bonding jumper size per NEC 250.28(D)(1) for service equipment. 1 input, 1 output.
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Grounding Electrode Conductor Sizer
GEC copper size from the service conductor per NEC Table 250.66. 1 input, 1 output.
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Commercial Lighting Load Calculator
Lighting plus receptacle load from floor area: continuous VA, feeder amps, 20A circuits. 4 inputs, 4 outputs with grouped results.
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