Cable Energy-Loss Cost Analyzer — Put Annual Cable Loss Into Dollars
Calculate resistive cable loss from current and resistance, then turn that loss into annual energy use and electricity cost using the operating schedule and tariff you provide.
Loss calculation inputs
Why cable loss becomes an operating-cost issue
Resistive cable loss is power that does not reach the useful load. When current and resistance are known, the loss can be translated into energy over the operating hours and then into cost using a tariff assumption.
Why current matters so strongly
Because loss follows the square of current in the simplified I²R model, changing current can materially change the modeled loss even when resistance stays constant.
Why loop resistance must be understood
A common mistake is entering the resistance of only one conductor when the calculation is intended to represent a complete electrical path. The tool labels the field explicitly as loop resistance.
Example
At 120 A and 0.08 Ω, modeled resistive loss is 1,152 W. At 4,000 operating hours, that corresponds to about 4,608 kWh/year.
Limitations
Real conductor resistance changes with temperature, connection conditions and other factors. This tool is a transparent estimate using the resistance you provide.
Frequently asked questions
Does the tool account for conductor temperature?
No. Enter the resistance value appropriate to the condition you want to model.
Can I use a zero resistance value?
Yes mathematically, although it produces zero modeled loss.
Can I compare two cable options?
This page analyzes one set of assumptions at a time. Use the lifecycle comparison tool for broader two-option analysis.