1. What is Amp Draw Calculation?

Definition: This calculator determines the electrical current (in amperes) drawn by a device based on its power consumption and operating voltage.

Purpose: It helps electricians, engineers, and DIYers properly size electrical circuits and components.

2. How Does the Calculator Work?

The calculator uses Ohm's Law formula:

Where:

• \( I \) — Current (amperes)
• \( P \) — Power (watts)
• \( V \) — Voltage (volts)

Explanation: The power consumption is divided by the operating voltage to determine the current draw.

3. Importance of Amp Draw Calculation

Details: Proper current calculation ensures safe circuit design, prevents overloads, and helps select appropriate wire sizes and circuit breakers.

4. Using the Calculator

Tips: Enter the device's power consumption in watts and operating voltage (default 120V for standard US outlets). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between amps and watts?
A: Watts measure power (energy consumption), while amps measure current (electron flow). Watts = Volts × Amps.

Q2: What voltage should I use for calculations?
A: Use 120V for standard US outlets, 240V for large appliances, or check your device specifications.

Q3: How do I find a device's power consumption?
A: Check the label or specifications (often listed in watts), or use a watt meter for accurate measurement.

Q4: Why is my circuit breaker tripping?
A: If the calculated amp draw exceeds your circuit's rating (typically 15-20 amps for standard circuits), the breaker will trip to prevent overheating.

Q5: Does this work for DC circuits too?
A: Yes, the formula applies to both AC and DC circuits, though AC calculations may involve additional factors like power factor.