- Published on
What a hazardous area is, why it matters, and how zones, Ex equipment, and competent design work together.
Jon Wilson
Engineer. Projects, notes, and occasional writing.
A place for things I have built, tested, learned, fixed, or wanted to keep somewhere useful.
Recent Notes
Practical notes from projects, tools, and technical work.
- Published on
A practical guide to BS 7671 from an electrical design engineer's perspective, covering design inputs, load assessment, cable sizing, protection, earthing, verification, and documentation.- Published on
A practical guide to IEC 62443, the NCSC Cyber Assessment Framework, UK cyber law, zones and conduits, network segmentation, secure remote access, industrial firewalls, asset management, patching, and cyber security across the engineering lifecycle.
Projects
Project shelves for homelab work, drones, and this site rebuild.
Engineering Tools
Practical calculators and engineering utilities that run directly in your browser.
Control Panel Load Calculator
Create AC and DC load schedules, assess individual supply rails, and produce a traceable engineering calculation report.
Open calculator →Control Panel Heat Calculator
Calculate component heat losses, estimate enclosure temperature rise, and assess natural or forced ventilation requirements.
Open calculator →Currently
Keeping project notes tidy, moving useful writing into this site, and building out a practical archive for future reference.