1. What is Cable Loss Calculation?

Definition: This calculator determines the power loss in electrical cables based on current flow and cable resistance.

Purpose: It helps electrical engineers and technicians estimate energy losses in wiring systems to ensure efficient power distribution.

2. How Does the Calculator Work?

The calculator uses Joule's first law formula:

Where:

• \( P \) — Power loss (watts)
• \( I \) — Current flowing through the cable (amperes)
• \( R \) — Resistance of the cable (ohms)

Explanation: The power loss increases with the square of current and linearly with resistance.

3. Importance of Cable Loss Calculation

Details: Proper calculation helps in selecting appropriate wire gauges, minimizing energy waste, and preventing overheating in electrical systems.

4. Using the Calculator

Tips: Enter the current in amps and cable resistance in ohms. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why does current appear squared in the formula?
A: Power loss is proportional to the square of current because both voltage drop and current contribute to power (P=VI), and voltage drop itself is proportional to current (V=IR).

Q2: How do I find the resistance of my cable?
A: Resistance can be calculated using R = ρL/A, where ρ is resistivity, L is length, and A is cross-sectional area, or measured directly with an ohmmeter.

Q3: Does this account for AC effects like skin effect?
A: No, this is the DC calculation. For AC systems, additional factors like skin effect and power factor must be considered.

Q4: What's a typical acceptable power loss percentage?
A: Generally, power loss should be kept below 2-3% of the total power in distribution systems.

Q5: How can I reduce cable losses?
A: Use thicker cables (lower resistance), shorter runs, higher voltage (lower current), or better conductive materials.