The Sparkys Mate

The Ultimate Digital Toolset for BS 7671 Electrical Professionals
The BS7671 Field Toolkit is the definitive companion for electrical engineers, electricians, and contractors working with the UK's IET Wiring Regulations. Designed to streamline your workflow from the site to the office, this application combines high-performance calculation engines with an intuitive interface to ensure your installations are safe, compliant, and efficient.
Why Choose BS7671 Field Toolkit?
Electricity is precise—your tools should be too. Gone are the days of carrying heavy reference books or relying on guesswork. Our toolkit brings the complexity of BS 7671:2018+A2:2022 into your pocket, providing instant answers to complex design and testing questions.
KEY FEATURES:
1. Smart Circuit Design Engine
Input your load requirements, and let the app handle the math. Calculate voltage drop, earth fault loop impedance (Zs), and thermal constraints with ease. Our engine cross-references current carrying capacities (Table 4D5, etc.) to recommend the optimal cable and protective device for any installation method.
2. Intelligent Cable Finder
Instantly identify the correct cable type and size for your specific installation conditions. Whether you are dealing with multi-core SWA, 6242Y, or XLPE, the app adjusts for ambient temperature, grouping factors, and thermal insulation to ensure you never undersize a cable again.
3. BS 7671 Compliance Validator
Check your test results against the official regulatory limits. Verify that your measured Zs values meet the maximum permitted values for various circuit breakers (Type B, C, and D) and fuses. The app provides clear "Pass" or "Fail" indicators, helping you identify potential issues before you leave the site.
4. Site History & Document Management
Keep your projects organized. Save circuit designs, test results, and site notes directly within the app. Each record is timestamped and categorized, making it easy to retrieve data for certifications or client reporting at a later date.
5. Real-Time Regulatory Updates
The electrical industry never stands still. Our toolkit features a "Regulatory Update" system that alerts you to the latest amendments and technical bulletins from the IET and industry bodies, ensuring your work always reflects the "state of the art."
6. Professional Utility Suite
Includes specialized calculators for:
Total Earth Loop Impedance (Zs = Ze + R1 + R2)
Resistance of conductors at varying temperatures (20°C vs 70°C)
Earthing and Bonding sizing (Table 54.7 and 54.8)
Unit conversions and electrical formulas (Ohms Law, Power Triangle)
Built for the Field
This app was designed from the ground up to work even in the most demanding environments. With high-contrast "Dark Mode" for low-visibility areas and oversized touch targets for easy use, the BS7671 Field Toolkit is as rugged as your physical tools.
Who is this for?
Qualified Electricians (Domestic, Commercial, Industrial)
Electrical Design Engineers
Testing & Inspection Specialists (EICR)
Electrical Apprentices and Students
Contract Managers and Site Supervisors
Compliance Disclaimer
While the BS7671 Field Toolkit is built to reflect the current IET Wiring Regulations, it is intended to supplement the professional judgment of a qualified electrician. Always refer to the official BS 7671 documentation for final certification.
Streamline your testing. Master your design. Download the BS7671 Field Toolkit today and elevate your electrical craftsmanship.

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