Equipment & Systems
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.