Castline Systems Electrical Software

Cable Calculation & Electrical Design,
Test & Inspection Certification

Explore Castline Software products

CableCalc BS7671 Macbook

New! CableCalc 18-2
Cable Sizing, Electrical Calculation and Design

New for 2024, CableCalc 18-2 BS7671 Edition is a software application for performing electrical calculations for circuit cable sizing and the creation of distribution board designs. CableCalc 18-2 is the ideal tool for electricians and designers and is fully compliant with BS7671:2018+A2:2022 Requirements for Electrical Installations, IET Wiring regulations 18th Edition Amendment 2.

Available for Windows PC and Mac, easily calculate volt drop, disconnection time, fault current, earth fault, overload & short circuit for single and three phase projects. Evaluate sub-circuits & feeder cables for multiple distribution board projects. Once finalised, produce detailed diagrams, schedules and schematic drawings for the complete cable installation.

Electrical Certification Software

FormFill is an application for managing and producing test & inspection certificates, commercial fire alarm and emergency lighting certificates. available for Windows PC and Mac, FormFill is fully compliant with BS7671:2018+A2:2022 Requirements for Electrical Installations, IET Wiring regulations 18th Edition Amendment 2.

Fill certificates in on-screen or collect data in advance using the mobile app or compatible test instruments then issue branded certificates that include your company logo and choice of colours. Certificates are validated for errors and your client data is stored for easy retrieval in the future.

FormFill Laptop and Certificates

Inclusive Product Benefits

Cross platform compatibility

Windows LogoMac OS Logo
Whether you use a Mac or a PC, FormFill and CableCalc are available for both Windows and Mac OS. Especially convenient if you have multiple users working on different computer hardware.

Free Mobile Apps

Supporting on-site data collection apps for Android, iPad and iPhone are included with desktop versions of FormFill. Also enjoy a free CableCalc app for quick on-site twin & earth calculations.

BS7671 Amendment 2 Compliant

All Castline products are fully compliant with BS7671:2018+A2:2022 Requirements for Electrical Installations, IET Wiring regulations 18th Edition Amendment 2

No Internet Connection Required

Castline products are compatible with most Cloud based storage solutions, however a constant Internet connection is not required when using the software applications. This means that when you're at a site that has no WIFI or phone signal, the applications will continue to run without issues or interruptions.

Standalone iPad Versions

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CableCalc BS7671 -for iPad
Easy on-site calculation

As an alternative to CableCalc BS7671 for Mac and Windows, Castline Systems offer a standalone iPad app. CableCalc BS7671 for iPad is the ideal tool to carry out single and three phase cable calculations for radial, ring and sub main circuits quickly on-site.

CableCalc BS7671 will calculate and check voltage drop, disconnection time, fault current, earth fault data, overload and short circuit data while applying correction factors such as temperature and grouping if required. When your calculation is complete, CableCalc BS7671 will produce a detailed PDF report ready for printing and emailing to your clients. Calculations can also be saved so they may be edited at a later date.

Download on the App Store
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FormFill Pro - For iPad
Test and Inspection Management

In addition to the supporting mobile apps for desktop versions of FormFill, Castline Systems offer a standalone version of FormFill for iPad. FormFill Pro gives you the ability to produce BS7671 electrical certificates directly from your iPad. FormFill Pro includes all current BS7671 certificates as standard; Minor Electrical Installation Works, Electrical Installation Certificate, Electrical Installation Condition Report and Domestic Fire Alarm Installation Certificate and has an option to add BS5266 Emergency Lighting and BS5839 Commercial Fire Alarm certificates too.

Certificates may be customised by adding your company logo and setting your choice of background and text colours. You can also add photos from your camera roll to certificates on additional pages before emailing them direct to your client or printing them using an Airport compatible printer.

Download from the App Store

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