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Voltage Drop Equation:
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The voltage drop calculation determines how much voltage is lost as electricity travels through a wire. This is particularly important in low voltage lighting systems where even small voltage drops can significantly affect performance.
The calculator uses the voltage drop equation:
Where:
Explanation: The equation calculates the total voltage drop by considering the current, wire resistance, and total length of the circuit (both out and back).
Details: Proper voltage drop calculation ensures that lighting systems operate efficiently and maintain adequate brightness. Excessive voltage drop can lead to dim lights, reduced lifespan of fixtures, and potential safety issues.
Tips: Enter current in amperes, resistance in ohms per meter, and length in meters. All values must be positive numbers. The calculator will determine the total voltage drop for the circuit.
Q1: What is an acceptable voltage drop for low voltage lighting?
A: Generally, voltage drop should be limited to 3-5% of the supply voltage for optimal performance.
Q2: How can I reduce voltage drop in my lighting system?
A: Use thicker wires (lower resistance), reduce run lengths, or use multiple power feeds to different sections.
Q3: Why multiply by 2 in the calculation?
A: The factor of 2 accounts for both the supply and return paths in the circuit (the total length the current travels).
Q4: Does this calculation apply to AC and DC systems?
A: This simplified calculation works for DC systems. For AC systems, additional factors like power factor may need consideration.
Q5: Where can I find resistance values for different wire sizes?
A: Wire resistance values are typically available in electrical engineering references or from wire manufacturers' specifications.