CableCalc BS7671 - 18th Edition

CableCalc BS7671 Laptop

CableCalc BS7671 is a cable calculation and evaluation software application fully compliant with BS7671:2018 Requirements for Electrical Installations IEE Wiring Regulations 18th Edition based on IEC/CENELEC Standards.

Following on from the success of previous releases of CableCalc BS7671 over the past 20 years, CableCalc BS7671 provides an intuitive user interface with a host of exciting features and both Mac and Windows versions come with any purchase.

CableCalc BS7671 will calculate and check for voltage drop, disconnection time, fault current, earth fault data, overload and short circuit data in five easy steps producing detailed print-outs for each calculation.

CableCalc BS7671 is available in four levels to suit a wide range of needs, from simple installations up to larger scale projects containing hundreds of distribution boards. All Levels of CableCalc BS7671 will perform both single and three-phase calculations. The phase colours default as Brown, Black and Grey with Blue for Neutral, but may be customised to any set of colours.

Click a wire below to find out more....

CableCalc BS7671 - Level 1

CableCalc Level 1
CableCalc Level 1

For the electrician or engineer who requires quick calculations to the requirements of BS7671. CableCalc BS7671 Level 1 will calculate single and three phase calculations for radial and ring main circuits with the results shown as detailed calculation documents. Level 1 also includes Castline Systems' complete database of copper cables and generic protective devices.

CableCalc BS7671 Level 1 Print Out
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Use CableCalc BS7671 to create detailed and stylish PDF design schedules which can be emailed straight to your clients or printed on paper if required. CableCalc BS7671 is also compatible with third party cloud solutions such as One Drive, Drop Box, iCloud and Google Drive. Please note that Phase Graphs are only avaiable in Levels 3 & 4 and Design Schedules from Level 2 onwards.

Perform calculations and checks in six easy processes:

  1. Supply Details - Source information, circuit type, load and distance
  2. Cable Selection - Cable type, size and installation method
  3. Correction Factors - Grouping factors, temperature correction, thermal insulation and any cable tray or ladder configuration
  4. Protective Device - Type and rating of the device protecting the circuit
  5. CPC - Details of any cable sheath or armouring, internal cores and any separate cables or conduit/trunking
  6. Time - Device disconnection time graph display only for information.
CableCalc BS7671 disconnection time graph screenshot

Generic Protective Devices included are:

  • Miniature Circuit Breakers (MCB) to BS EN 60898 types B, C & D to 125A, Older BS 3871 types 1, 2, 3, & 4 to 125A
  • Moulded Case Circuit Breakers (MCCB) to BS EN 60947, 20A to 1600A, adjustable for Magnetic (multiplier) & Thermal settings
  • Air Circuit Breakers (ACB) to BS EN 60947, 400A to 6300A, adjustable for Magnetic (multiplier) & Thermal settings
  • Residual Current Devices (RCD) to BS EN 61008, 10mA, 30mA, 100mA, 300mA, 6A to 100A
  • Residual Current Circuit Breakers (RCBO) to BS EN 61009, 10mA, 30mA, 100mA, 300mA, 6A to 100A
  • BS 88 HRC cartridge fuses, 2A to 800A
  • BS 1361 HRC cartridge fuses, 5A to 100A
  • BS 1362 plug fuses, 1A to 13A

buy CableCalc Level 1 - £199.00

CableCalc BS7671 - Level 2

CableCalc Level 2
CableCalc Level 2

For the contractor or engineer who requires detailed calculation results and schedules. Including all the features found in Level 1, design complete electrical installations for both single-phase and three-phase projects, each supporting up to five distribution boards.

CableCalc BS7671 Level 2 Print Out

CableCalc BS7671 - Level 2 Key Features:

  • Project design up to 5 distribution boards (including the supply)
  • Circuit details and design schedules
  • Single-line diagrams
  • Sub-main calculations
  • Domestic and street lighting circuit calculations
  • DOL motor circuits
  • Star Delta Motor circuits
  • Includes CableCalc Utilities*

Also benefit from additional features of Level 2, such as the ability to perform discrimination checks to highlight anomalies instantly. The lighting calculation facility is especially useful for calculations involving cables ‘daisy chained’ or looped together, as in street lighting installations or sub-main distribution.

*CableCalc Utilities is a useful quick-reference tool featuring: Diversity calculations, commonly used conversions and formulae, cable length from resistance, IP rating reference, conduit & trunking carrying capacity and ring circuit analysis.

BUY CABLECALC LEVEL 2 - £295.00

Alternatively, get CableCalc Level 2 as part of a Contractor License Package for £150 per year or £15 per month

CableCalc BS7671 - Level 3

CableCalc Level 3
CableCalc Level 3

For the designer or consultant working on larger projects requiring high quality designs and schedules, CableCalc BS7671 - Level 3 is a highly efficient design tool for producing detailed diagrams, schedules and schematic drawings for a complete cable installation. Including all of the features found in levels 1 & 2, Level 3 contains a range of additional features and is capable of producing up to 20 distribution boards.

CableCalc BS7671 Level 2 Print Out

CableCalc BS7671 - Level 3 Key Features:

  • Distribution board schematic drawings
  • Create single line project layout diagrams
  • User defined protective devices
  • Up to 20 distribution board Schedules
  • Manufacture specific protective devices including Square D, MEM, Ylex, Hager, Crabtree and more

With a single click, CableCalc BS7671 - Level 3 will re-calculate all of the sub-circuits and feeder cables for multiple distribution board projects.

Get CableCalc Level 3 as part of a Design License Package - £275.00

Alternatively buy CableCalc Level 3 Standalone - £695.00

CableCalc BS7671 - Level 4

CableCalc Level 4
CableCalc Level 4
CableCalc BS7671 - Level 4 Distribution Board Diagram

The top level of CableCalc BS7671 for designers and consultants who require high-quality detailed diagrams, schedules and schematic drawings for a complete cable installation project of any size. Level 4 includes all of the features of levels 1, 2 & 3 as well as additional features:

  • Unlimited number of distribution boards
  • Distribution board diagrams
  • Aluminium cables database included

CableCalc BS7671 - Level 4 will calculate all sub-circuits and feeder cables for multiple distribution board projects from a single click.

Get CableCalc Level 4 as part of a Design License Package - £275.00

Alternatively buy CableCalc Level 4 Standalone - £1995.00

CableCalc Level Comparison Chart

Detailed calculation print out
Adiabatic CPC size calculations
CableCalc Level 1
CableCalc Level 2
CableCalc Level 3
CableCalc Level 4
Single-phase calculations
Device time/current graphs
PVC Twin and Earth Cables
Ring Circuit Calculations
Radial Circuit calculations
Three-phase calculations
Full range of cables including:
CableCalc Level 1
PVC, XLPE & LSF
CableCalc Level 2
CableCalc Level 3
CableCalc Level 4
FP Fire resistant cables
Flex & Tri-rated cables
MICC, Rubber and more
Lighting Circuit calculations
Sub main circuit calculations
star delta motor calculations
DOL Motor calculations
Project Design up to 5 DBs
CableCalc Level 3
CableCalc Level 4
Circuit Details Print-out
CableCalc Level 2
Design schedule print-outs
Export print-out as PDF
Device discrimination graphs
Single line diagrams
CableCalc Level 3
Manufacturer protective devices
Up to 20 distribution boards
User defined protective devices
CableCalc Level 4
DB schematic diagrams
Distribution board diagrams
Aluminium Cables
Unlimited distribution boards

CableCalc BS7671 - for iPad

CableCalc BS7671 for iPad

CableCalc BS7671 for iPad is an app that includes nearly all of the features of CableCalc BS7671 Level 1, meaning that you can carry out single and three phase cable calculations on-site using an iPad.

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Calculate and check for voltage drop, disconnection time, fault current, earth fault data, overload and short circuit data and will produce a detailed print-out for each calculation in PDF format which can be printed to an AirPort compatible printer or emailed.

Perform both single and three-phase calculations for radial, ring and sub main circuits.

CableCalc for iPad includes a full database of copper cables and generic protective devices and allows you to complete all information relevant to the calculation including any applicable correction factors for temperature, grouping etc. Energy let through values can be entered and calculations can be saved to load back in later.

The following cable types are included:

  • 70°C PVC Armoured & non-armoured multi-core & singles, twin & earth, 6491x & 6181y Singles
  • 90°C LSF Armoured singles & multi-core, 6491b & 6181 Singles, Twin & earth, Flat 3 core & earth
  • 90°C XLPE Armoured & Non Armoured singles & Multi-core, 6491b & 6181xy singles
  • FP100, FP200, FP200 Flex, FP400 and Fireforce PH30 Fire rated
  • MICC PVC Sheath/Bare, Heavy & Light Duty
  • CY, SY, YY 70°C PVC Flexible cable, 105°C Tri-Rated singles
  • 60 & 90°C Rubber insulated flexible cable
Download on the App Store

Buy CableCalc BS7671

Alternatively, buy CableCalc as part of an annual or monthly License package
  • CableCalc Level 1 (Windows) - £199.00
  • CableCalc Level 2 (Windows) - £295.00
  • CableCalc Level 3 (Windows) - £695.00
  • CableCalc Level 4 (Windows) - £1995.00
Mac OS
  • CableCalc Level 1 (Mac OS) - £199.00
  • CableCalc Level 2 (Mac OS) - £295.00
  • CableCalc Level 3 (Mac OS) - £695.00
  • CableCalc Level 4 (Mac OS) - £1995.00
  • For MacOSX 10.10 (Yosemite) and later
CableCalc for iOS mobile devices
Download from the App Store

All prices are exclusive of VAT
All purchases of CableCalc come with access to both Mac and Windows versions, although the purchase of additional users may be required for use on more than one computer.