Electrical field tools
Equipment & Systems
Work with motors, communications, protection, and installed electrical equipment.
Motor Systems
Check motor current, output, voltage drop, overload settings, and drive compatibility.
Multiple Motor Feeder CalculatorEstimate feeder current from multiple motor currents and largest-motor adder.Motor Speed and Slip CalculatorCalculate synchronous speed and induction motor slip.Motor Starting Current CalculatorEstimate locked-rotor current from full-load current and multiplier.VFD Motor Speed CalculatorEstimate motor speed from drive frequency and slip.Motor Full-Load Current and Circuit Protection ReferenceLook up motor table FLC, branch-conductor ampacity, and general protection limits.Motor Overload Protection Setting ReferenceCalculate normal and conditional overload trip-current limits.Motor Energy Cost CalculatorEstimate electrical input power, annual energy, and operating cost from shaft load and efficiency.Motor Efficiency Upgrade Payback CalculatorCompare energy costs at equal shaft duty and estimate simple payback for a replacement motor.Pump and Fan Speed Energy CalculatorEstimate relative flow, head, and shaft power at a changed speed using ideal affinity laws.Motor Voltage Drop EstimatorEstimate running and starting voltage drop from motor and conductor data.Three-Phase Motor Power and Torque CalculatorEstimate motor input power, shaft horsepower, and torque.VFD and Motor Compatibility WorksheetScreen rated current and track manufacturer review items.
Low-Voltage & Communications
Estimate low-voltage cable drop and compare communications equipment power limits.
Fire Alarm Battery Load WorksheetCalculate standby and alarm amp-hour demand from project inputs.Low-Voltage Cable Voltage Drop EstimatorEstimate two-wire DC cable drop from manufacturer resistance data.PoE Power Budget EstimatorCompare device demand with switch and port power limits.Notification Appliance Circuit Voltage Drop CalculatorEstimate segment-by-segment DC voltage drop and appliance terminal voltage.Access Control Power Supply CalculatorEstimate controller, lock, and accessory current for standby and simultaneous activation.Security System Backup Battery CalculatorEstimate backup capacity from security system standby and alarm loads and durations.Distributed Speaker Load CalculatorSum speaker transformer taps and compare with amplifier output capacity and headroom.
Protection & Safety
Review selected equipment protection and electrical safety inputs.
Arc-Flash Label Data HelperCheck that study-supplied label fields and review records are present.Available Fault Current and SCCR ScreenEstimate fault current at transformer terminals and equipment.Protective Device Time-Current Curve Comparison CalculatorCompare interpolated clearing times from two supplied protective-device curves.Energy Control Checklist BuilderRecord energy sources and isolation points against a written procedure.GFCI and AFCI Requirement FinderCheck selected circuit-protection requirements by location and circuit details.Standard Overcurrent Device Rating CalculatorFind the next standard fuse or breaker ampere rating.Equipment SCCR Comparison CalculatorCompare study-provided available fault current with assembly SCCR and voltage ratings.Ground-Fault Loop Current EstimatorEstimate grounded fault current from source voltage and complete loop impedance.
Industrial & Emergency Systems
Review industrial environments, emergency lighting, and equipment records.
Emergency Lighting Runtime ScreenCheck emergency lighting energy against a required duration.Emergency Lighting Illumination CalculatorEstimate direct illuminance at one point from fixture photometric data and geometry.Industrial DC Power Supply Sizing CalculatorCompare continuous and transient DC loads against manufacturer supply ratings.Redundant DC Power Supply Capacity CalculatorCompare normal and single-module-failure capacity with DC system load.Control Panel Heat Load CalculatorSum component losses and external heat gain for an enclosure heat-load estimate.Enclosure Ventilation Airflow CalculatorEstimate ideal ventilation airflow from enclosure heat load and allowable temperature rise.Enclosure Cooling Capacity CalculatorEstimate enclosure active cooling demand from heat load, dimensions, ambient, and target temperature.Welding Circuit Sizing CalculatorScreen welder conductor and protective-device values using entered nameplate and rule factors.Industrial Enclosure Environment ReferenceFilter NEMA type descriptions by location and exposure.