Feeder Size Calculator

Calculate Feeder Size







Formula

The formula to calculate the feeder size is:

\[ FS = \frac{2 \cdot \rho \cdot I}{V \cdot PF} \]

Where:

Example

Let's say the resistivity (\( \rho \)) is 10 ohms per circular mil foot, the current (\( I \)) is 100 amperes, the voltage (\( V \)) is 240 volts, and the power factor (\( PF \)) is 1. Using the formula:

\[ FS = \frac{2 \cdot 10 \cdot 100}{240 \cdot 1} \]

We get:

\[ FS = \frac{2000}{240} \approx 8.33 \text{ circular mils} \]

So, the feeder size (\( FS \)) is approximately 8.33 circular mils.

What is Feeder Size?

Feeder size refers to the cross-sectional area of an electrical feeder wire, which is necessary to carry a certain amount of current without overheating or dropping too much voltage. It is typically measured in circular mils, which is a unit of area used specifically for wires. Proper feeder sizing is crucial for the safety and efficiency of an electrical system.

Extended information about "Feeder-Size-Calculator"

How to Size a Feeder

Definition: Sizing a feeder involves determining the appropriate size of the feeder conductor based on the load it will carry.

Formula: \( \text{Feeder Size} = \frac{\text{Total Load}}{\text{Voltage} \times \text{Efficiency}} \)

Example: \( \text{Feeder Size} = \frac{10000}{240 \times 0.8} \)

How to Calculate Feeder Conductor Size

Definition: Calculating the feeder conductor size involves determining the appropriate wire size based on the current it will carry.

Formula: \( \text{Conductor Size} = \frac{\text{Current}}{\text{Allowable Ampacity}} \)

Example: \( \text{Conductor Size} = \frac{50}{0.8} \)

Feeder Demand Range Calculator

Definition: Feeder demand range calculation involves determining the demand load for a feeder based on the connected load.

Formula: \( \text{Demand Load} = \text{Connected Load} \times \text{Demand Factor} \)

Example: \( \text{Demand Load} = 15000 \times 0.75 \)