Built by a working UK electrical engineer
Interactive 3D machines you can take apart, and BS 7671 calculators that show every line of the working. Free, no account, works offline.
01 / Visual Lab
Real machines and real protective devices, built from first principles. Turn them, open them, run them.
Raise the magnetising force on a wound toroidal core and watch flux density flatten as it saturates.
See through the frame to the squirrel-cage rotor, laminated stator core, and 3-phase distributed copper windings.
An open drive cabinet: rectifier, DC bus, IGBT inverter bridge, and the motor it controls.
02 / Calculators
Computed from first principles, with the regulation cited and the full working underneath every result.
4.0 mm²
Conductor size, flat T&E
PASS · Iz 37 A ≥ In 32 A
14.2 A
Full load current
Check against motor nameplate
£1,622.40 a year
Running cost
Standing charge not included
03 / Industry Wire
Curated UK electrical engineering news, safety notices, and regulatory updates from trade press and industry sources.
BS 7671:2018+A4:2026 (Orange Book) is the sole current UK wiring standard. Previous editions are withdrawn.
What changed in A4C.K Tools has launched Cable Bug following development based on market feedback and identified challenges faced by electricians. The company discussed the product's creation with Professional Electrician to highlight its utility for installers.
Read story