Load Current using Resistance (1-Phase 2-Wire US) Calculator

Formula Used:

\[ I = \sqrt{\frac{P_{loss}}{2 \times R}} \]

Current Underground AC (I):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is Load Current using Resistance (1-Phase 2-Wire US)?

The Load Current using Resistance (1-Phase 2-Wire US) calculation determines the current flowing through an underground AC electrical system based on line losses and resistance. This is essential for proper electrical system design and analysis.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ I = \sqrt{\frac{P_{loss}}{2 \times R}} \]

Where:

\( I \) — Current Underground AC (Ampere)
\( P_{loss} \) — Line Losses (Watt)
\( R \) — Resistance Underground AC (Ohm)

Explanation: This formula calculates the current by taking the square root of the ratio between line losses and twice the resistance in the system.

3. Importance of Current Calculation

Details: Accurate current calculation is crucial for electrical system design, ensuring proper component sizing, safety compliance, and efficient power delivery in underground AC systems.

4. Using the Calculator

Tips: Enter line losses in watts and resistance in ohms. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Why is the resistance multiplied by 2 in the formula?
A: The factor of 2 accounts for the total resistance in both conductors of the 1-phase 2-wire system.

Q2: What are typical resistance values for underground AC cables?
A: Resistance values vary based on cable material, size, and length, but typically range from 0.1 to 10 ohms per kilometer for standard installations.

Q3: How accurate is this calculation method?
A: This method provides a good approximation for current calculation, though actual values may vary slightly due to temperature effects and other factors.

Q4: Can this formula be used for overhead lines as well?
A: Yes, the same formula applies to both underground and overhead 1-phase 2-wire AC systems.

Q5: What safety considerations should be made when working with these calculations?
A: Always follow electrical safety standards, use appropriate personal protective equipment, and consult with qualified electrical engineers for critical applications.