Electrical Calculators | HVAC Lens App

Ohm's Law

Enter any two - the rest fills automatically

Voltage (V)

Current (A)

Resistance (ohms)

Power (W)

Voltage Drop

CEC max 3% (Rule 8-102)

Load current (A)

One-way length (ft)

System voltage

Phase

Wire material

Wire AWG

—

Drop (V)

—

Drop (%)

—

Status

—

Motor Circuit (MCA / MOP)

Motor FLA

Motors on circuit

Termination / insulation

MCA (A)

—

MOP / breaker (A)

—

Max breaker (A)

—

Wire size

—

Capacitor Sizing

Motor HP

Voltage

Capacitor type

Capacitance (uF)

—

Tolerance

—

3-Phase Power

Line-to-line voltage

Current (A)

Power factor

Real power (kW)

—

Apparent (kVA)

—

Wye / Delta Voltage

Vdelta = Vy / sqrt(3); Vy = Vdelta * sqrt(3). NA: 347 V = one leg of 600Y.

Direction

Source voltage (V)

Converted (V)

—

Phase-neutral V_LN

—

Presets

Compressor RLA (A)

Voltage

Wire temp rating

MCA (A)

—

Breaker (A)

—

Max MOP (A)

—

Wire size

—

Est. inrush (A)

—

Inrush current not used for breaker or wire sizing. Use nameplate LRA when available.

Enter as

Full Load Amps (FLA)

Voltage

FLA used (A)

—

MCA (A)

—

Breaker (A)

—

Wire size

—

Enter as

Total Defrost Heater Wattage (W)

System voltage

Current (A)

—

MCA (A)

—

Breaker (A)

—

Wire size

—

Leave blank for zero

Compressor RLA (A)

Cond fan FLA (A)

Evap fans total FLA (A)

Controls / other (A)

Defrost watts (opt.)

System voltage

Total running (A)

—

MCA (A)

—

Breaker (A)

—

Reference only - verify with manufacturer data

Cooling capacity

Unit

Compressor power (W)

Fan / aux power (W)

OR total power (kW) - overrides above

Load type

Cooling (kW)

—

Power in (kW)

—

COP

—

EER

—

kW/ton

—

Status

—

Unlock HVAC Lens App

Ohm's Law

Voltage Drop

Motor Circuit (MCA / MOP)

Capacitor Sizing

3-Phase Power

Wye / Delta Voltage