1. What is Voltage Drop Calculation?

The voltage drop calculation determines the appropriate cable size to ensure proper voltage at the load end of a low voltage circuit. It prevents excessive voltage drop that could affect equipment performance.

2. How Does the Calculator Work?

The calculator uses the voltage drop formula:

Where:

• \( I \) — Current in Amps
• \( L \) — Cable length in Meters
• \( VD\ Factor \) — Voltage drop factor (specific to cable type)
• \( Allowed\ VD \) — Maximum permitted voltage drop in Volts

Explanation: The equation calculates the minimum cable cross-sectional area needed to maintain voltage within acceptable limits.

3. Importance of Voltage Drop Calculation

Details: Proper voltage drop calculation ensures electrical equipment operates correctly, prevents energy waste, and maintains system efficiency.

4. Using the Calculator

Tips: Enter current in amps, length in meters, VD factor (consult cable specifications), and allowed voltage drop. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical allowed voltage drop?
A: For most applications, 3% of supply voltage is common for power circuits, 5% for lighting.

Q2: How do I find the VD Factor for my cable?
A: Consult cable manufacturer specifications - it depends on conductor material and installation method.

Q3: Does this apply to both AC and DC systems?
A: The basic principle applies to both, but AC systems may require additional considerations for power factor.

Q4: What about temperature effects?
A: Higher temperatures increase resistance. For precise calculations, use temperature-corrected values.

Q5: Should I round up the calculated size?
A: Yes, always select the next available standard cable size equal to or larger than the calculated value.