1. What is a Voltage Drop Calculator?

Definition: This calculator computes the voltage drop across a circuit based on current flow and resistance.

Purpose: It helps electricians and engineers determine how much voltage is lost in a circuit due to resistance.

2. How Does the Calculator Work?

The calculator uses Ohm's Law formula:

Where:

• \( VD \) — Voltage drop (volts)
• \( I \) — Current (amperes)
• \( R \) — Resistance (ohms)

Explanation: The current flowing through a conductor multiplied by its resistance equals the voltage drop across that conductor.

3. Importance of Voltage Drop Calculation

Details: Proper voltage drop estimation ensures electrical devices receive adequate voltage and helps prevent power loss in circuits.

4. Using the Calculator

Tips: Enter the current in amps and the resistance in ohms. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What causes voltage drop?
A: Voltage drop occurs due to resistance in conductors, connections, and components in an electrical circuit.

Q2: What's an acceptable voltage drop?
A: Typically 3% for branch circuits and 5% for feeder circuits, but check local electrical codes.

Q3: How can I reduce voltage drop?
A: Use larger wire sizes, reduce circuit length, or decrease the load current.

Q4: Does voltage drop affect power consumption?
A: Yes, voltage drop results in power loss (as heat) equal to I²R.

Q5: Is this calculation for AC or DC circuits?
A: This is the basic DC formula. For AC, you must also consider power factor and reactance.