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ENEnglish繁中繁體中文ESEspañolARالعربيةFRFrançaisITItalianoPTPortuguêsRUРусскийDEDeutschJA日本語VITiếng ViệtKO한국어THไทยTRTürkçe

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Engineering Calculator · 065

Cable Power Loss Calculator

Calculate ideal resistive power loss and energy loss from circuit current, total resistance and operating duration.

Electrical continuity
Start calculationReview the method

Live calculation

Enter the known values.

Units remain visible beside every field and result. Change any input to recalculate immediately in your browser.

01

Inputs

02

Results

Power loss20W
Energy loss160Wh
Heat per hour72kJ

Formula
Ploss=Ic2RcP_{\mathrm{loss}}=I_c^2R_c

The calculation runs locally in this browser. Values are not submitted or stored by this tool.

Direct answer

What this result means

Calculate ideal resistive power loss and energy loss from circuit current, total resistance and operating duration. The relationship P = I²R ties circuit current, circuit resistance and operating duration directly to the reported result. Current and resistance are constant during the entered duration. Treat the value as a transparent preliminary calculation, then compare it with the actual cable-entry assembly and current product documentation.

Cable Power Loss Calculator engineering relationship diagramP = I²R defines the calculation shown here. Current and resistance are constant during the entered duration. Keep the entered units with the result so another reviewer can reproduce the method. This dedicated schematic represents cable power loss and is not to scale.RESISTIVE LOSS · TOOL 065Circuit currentPower loss
Calculator-specific engineering relationship diagram — schematic, not a product drawing, and not to scale.

Formula & theory

Make the assumptions visible.

P = I²R defines the calculation shown here. Current and resistance are constant during the entered duration. Keep the entered units with the result so another reviewer can reproduce the method.

Calculation relationship
Ploss=Ic2RcP_{\mathrm{loss}}=I_c^2R_c

P = I²R defines the calculation shown here. Current and resistance are constant during the entered duration. Keep the entered units with the result so another reviewer can reproduce the method.

Variables

tOperating durationh
EEnergy lossWh

Use sequence

From measurement to review

  1. Confirm circuit current and circuit resistance from a controlled drawing, measurement or project document.
  2. Apply P = I²R with consistent units and keep the entered values beside the result.
  3. Use power loss only after checking conductor temperature, AC losses, duty cycle, ventilation and termination resistance.

Limits

What this calculation does not confirm

  • Current and resistance are constant during the entered duration.
  • Inputs describe one defined operating or measurement condition and use mutually consistent units.
  • The result does not by itself confirm product suitability, standards compliance, ingress performance or installation approval.

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Calculator FAQ

Use the number without losing the engineering context.

These answers clarify what the tool calculates and where a product-specific review still begins.

01Calculator guidanceHow does the cable power loss calculator calculate power loss?

The tool applies P = I²R to circuit current, circuit resistance, operating duration. Current and resistance are constant during the entered duration. Keep the displayed units with the result so the calculation can be repeated.

02Calculator guidanceWhat does power loss show for this resistive loss review?

Calculate ideal resistive power loss and energy loss from circuit current, total resistance and operating duration. It is a preliminary engineering value, not confirmation of a cable-gland model, standards compliance or installation approval.

03Calculator guidanceWhat should be checked about conductor temperature before using the cable power loss calculator result?

The equation does not model conductor temperature, AC losses, duty cycle, ventilation and termination resistance. Confirm those conditions against the actual cable-entry assembly, applicable requirement and current product documentation.

Product selection support

Connect the calculation with cable-entry product options.

Bepto Cable Glands can help relate a preliminary result to the product family and current model information for your application. You can start with the details you have; a complete drawing package is not needed to ask a question.

Request product support