Cable Size Calculator

http://Cable%20Calculator%20App

Cable Calc

A simple to use cable size calculator.

✔ Calculates Voltage Drop
✔ Calculates Zs
✔ Calculates R1+R2
✔ Calculates Cable Size

Download Cable Calc for iPhone, iPad or Android

CALCULATE VOLT DROP Calculates and displays the volt drop calculation result
CALCULATE R1+R2 & Zs Calculates the R1+R2 and Zs values for the circuit
DE-RATING FACTORS De-rating factors are auto applied based on your design parameters
PRINT RESULTS Print or save the calculation results and design parameters

Description

Cable Size Calculator

Cable Calc is a simple to use cable size calculator app for Android, iPad and iPhone to calculate the minimum required cable size mm² based on the cable current carrying capacity tables, volt drop, installation method, Maximum Zs and any relevant correction factors.

Spending hours hunting for those cable sizing charts, volt drop formulas or cable current rating tables is now thing of the past with this cable calculation software.

Correction Factors

  • Ci = Thermal Insulation
  • Cg = Grouping
  • Ca = Ambient Temperature (air & ground)
  • Cc = BS3036 Semi-enclosed Fuse
  • CF = Total of all Correction Factor Values

Design Parameters

  • Ib = Design Current
  • L= Length of Circuit
  • Vd = Voltage Drop
  • s = Disconnection Time
  • In = Protective Device Rating
  • Ze / Zdb = Source Earth Loop Impedance (ELI)
  • Lighting or Power Circuit or Submain

Cable Size Calculations

  • Calculates Volt Drop %
  • Calculates Circuit R1+R2
  • Calculates Max Zs (100% & 80% temperature adjusted)
  • Calculates Circuit Zs
  • Calculates Cable Size

Other Parameters

  • Cable Type
  • Installation Method
  • Earthing System Type
  • Protective Device Type & Rating
  • RCD Protection in TT Systems
  • Maximum Permissible Zs
  • Maximum Permissible Volt Drop

Validation Check Examples

  • Checks if calculating a lighting or power circuit against the device rating
  • Checks if the wrong disconnection time is selected
  • Checks if the wrong voltage drop % is selected
  • Checks if the circuit has suitable RCD protection in TT earthing systems
  • Checks if the protective device max Zs exceeds the source Ze / Zdb value
  • Checks if the selected disconnection time is correct for the type of circuit
  • Checks the design current (Ib) against the protective device rating (In)
  • + Many More…

Cable size calculation charts, figures, data, tables and the cable calculation formula are obtained from BS7671 2018. Cable sizes are sized to meet the maximum permitted volt drop %, max Zs and tabulated cable rating (It) after applying the relevant correction factors.

Screenshots

  • ‎Cable Calc Screenshot
  • ‎Cable Calc Screenshot
  • ‎Cable Calc Screenshot
  • ‎Cable Calc Screenshot
  • ‎Cable Calc Screenshot
  • ‎Cable Calc Screenshot
  • ‎Cable Calc Screenshot
  • ‎Cable Calc Screenshot
  • ‎Cable Calc Screenshot
  • ‎Cable Calc Screenshot

Print, Save & Sign Cable Calculation Results

PRINT | APPROVE | SIGN

Print then approve and sign the completed cable calculation results.

Features

Itemoptions
  • Simple to Use

    Step 1 > Step 2 = Results
  • Calculation Hints

    Assisting calculation hints
  • Verification Database

    Pre-programmed verification checker
  • Correction Factors

    Automatically applies the relevant correction factors
  • Print Results

    Print the cable calculation results and design parameters
  • Approve & Sign

    Approve and sign the printed calculation results document

Changelog

Date: March 2021
– Added 90oC singles
– Added the option to input the circuit reference
– Added the option to input the circuit description

Date: August 2020
– Fixed cable calculator H07RN error message when calculating H07 cable type for sizes >25mm
– Efficiency improvements.

Date: June 2020
– Back-end improvements
– Reduced app download size

Date: June 2020
– Added a print the cable calculation results function
– Minor tweaks

Date: May 2020
– Added H07RN-F cable type
– Improved verification database
– New and improved UI

Date: June 2019
– Design improvements
– Back-end improvements

Date: 2019
– Maintenance update
– Bug fixes
– UI enhancements

Date: 2019
– Fixed iOS 12 keyboard bug
– Added support for 60947-2 MCCB’s & ACB’s
– Added support for TT earthing systems
– Added support for RCD’s in TT earthing systems
– Added a verification checker
– UI improvements

Date: 2018
– BS 7671 18th edition 2018 update

Date: 2016
– Maintenance update

Date: 2016
– 1st release

Cable Calculation Software

Cable Calc

Cable Sizing Software | Cable Size Calculator

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App Demo

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FAQ's & How To

What are the cable installation methods?

Cable Installation Methods:

  • A = Enclosed in conduit in a thermally insulated wall.
  • B = Enclosed in conduit or trunking on a wall (surface).
  • C = Clipped direct.
  • D = Direct in ground or in ducting in ground.
  • E = Free air or perforated cable tray / ladder (multi-core).
  • F = Free air or perforated cable tray / ladder (single-core).
  • G = Free air flat spaced by 1 cable diameter.
  • 100 = Flat twin & earth cable above a plasterboard ceiling covered by thermal insulation NOT EXCEEDING 100mm.
  • 101 = Flat twin & earth cable above a plasterboard ceiling covered by thermal insulation EXCEEDING 100mm.
  • 102 = Flat twin & earth cable in a stud wall with thermal insulation with the cable TOUCHING the inner wall surface.
  • 103 = Flat twin & earth cable in a stud wall with thermal insulation with the cable NOT TOUCHING the inner wall surface.

What are the cable calculation correction factors?

The cable size calculation correction factors (de-rating factors) are:

  • Cg = Grouping
  • Ci = Thermal Insulation
  • Ca = Ambient Temperature
  • Cf = BS 3036 Semi-Enclosed fuses

Can I request a new feature?

Yes, we welcome feature requests and suggestions, you can send us your feature request here.

How to save, print or share the calculation results

Android:

  1. Tap “Print”.
  2. From the native print preview window select “save as PDF” from the select printer options.

iOS:

  1. Tap “Print”.
  2. From the native print preview window expand the Cable Calculation Results image (will open the native share / save preview window).
  3. Tap the top right share icon (save options are displayed, options are dependent on your device capabilities).

How to calculate cable size

To calculate a cable size:

  1. Input your design data.
  2. Select an installation method and apply the relevant correction factors.
  3. Tap Calculate.
  4. Print or save the cable calculation results.

How to calculate volt drop

We have programmed the volt drop calculation formula in to the app so you don’t have to, this cable size calculator app automatically calculates the volt drop % for you.

How to calculate R1+R2 and Zs

This cable size calculator app automatically calculates the Zs and R1+R2 for you.

How to contact our support team

You can contact our support team from the app or via our web contact form, contact support.

Document Your Cable Calculations

Cable Calculations PDF
http://Cable%20Calculator%20App

Get the App

An easy to use cable sizing software.

✔ Calculate Volt Drop
✔ Calculate Zs
✔ Calculate R1+R2
✔ Calculate Cable Size mm²

Download Cable Calc for Android and iOS