DC Voltage Wire Calculator

Voltage Drop Formula:

\[ Voltage\ Drop = \frac{2 \times L \times I \times R}{1000} \]

Voltage Drop:

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is DC Voltage Wire Calculation?

The DC Voltage Wire Calculator determines the voltage drop in DC circuits according to UK wiring regulations. It helps ensure proper wire sizing to maintain adequate voltage levels throughout the electrical system.

2. How Does the Calculator Work?

The calculator uses the voltage drop formula:

\[ Voltage\ Drop = \frac{2 \times L \times I \times R}{1000} \]

Where:

\( L \) — Length of the wire in metres (m)
\( I \) — Current flowing through the wire in amperes (A)
\( R \) — Resistance per kilometre in ohms per kilometre (Ω/km)

Explanation: The formula calculates the voltage loss along the wire due to its resistance, with the factor of 2 accounting for the return path in DC circuits.

3. Importance of Voltage Drop Calculation

Details: Proper voltage drop calculation is essential for designing efficient DC electrical systems, ensuring equipment receives adequate voltage, preventing performance issues, and complying with UK wiring regulations.

4. Using the Calculator

Tips: Enter wire length in metres, current in amperes, and resistance per kilometre in Ω/km. All values must be positive numbers. The calculator will determine the voltage drop in volts.

5. Frequently Asked Questions (FAQ)

Q1: Why is voltage drop important in DC circuits?
A: Excessive voltage drop can cause equipment malfunction, reduced efficiency, and potential safety hazards in DC electrical systems.

Q2: What is an acceptable voltage drop percentage?
A: Typically, voltage drop should not exceed 3-5% of the supply voltage for most applications according to UK wiring standards.

Q3: How do I find the resistance per km for different wire sizes?
A: Resistance values are available in wire specification tables based on conductor material (copper/aluminum) and cross-sectional area.

Q4: Why is there a factor of 2 in the formula?
A: The factor of 2 accounts for both the outgoing and return paths in DC circuits, as current flows through both conductors.

Q5: Can this calculator be used for AC circuits?
A: No, this calculator is specifically designed for DC circuits. AC circuits require different calculations considering impedance and power factor.