1. What is Power Loss in Cable?

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

Purpose: It helps electrical engineers and technicians determine energy losses in wiring systems.

2. How Does the Calculator Work?

The calculator uses Joule's first law formula:

Where:

• \( \text{Loss} \) — Power loss (watts)
• \( I \) — Current (amperes)
• \( R \) — Resistance (ohms)

Explanation: The power loss is proportional to the square of the current multiplied by the resistance of the conductor.

3. Importance of Power Loss Calculation

Details: Calculating power loss helps in selecting proper wire gauge, minimizing energy waste, and ensuring system efficiency.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why does power loss increase with current squared?
A: Because both the voltage drop across the resistance and the current increase together, resulting in a squared relationship.

Q2: How do I find cable resistance?
A: Resistance can be calculated using the wire material resistivity, length, and cross-sectional area.

Q3: Does this account for AC effects?
A: This gives DC loss. For AC, you would need to consider skin effect and proximity effect.

Q4: How can I reduce power loss?
A: Use thicker cables (lower resistance), shorter runs, or higher voltage (lower current for same power).

Q5: Is this heat loss?
A: Yes, the power loss is converted to heat in the conductor.