Lightning protection guides & validation
Plain-language notes on the IEC 62305 standards behind the tools, and exactly how each engine is checked. Written for practising engineers — clause-grounded, no reproduced tables.
Start here
Your first building, through to its dossier
Follow a five-part model through assessment, protection design, specification and a recorded document revision.
Follow the illustrated workflow →Using Voltbench
Engineering guides
IEC 62305-2: what changed in the 2024 edition
Read →IEC 62305-2
The free IEC 62305-2 tools, and which edition each one computes
Read →IEC 62305-2
Where the lightning density comes from
Read →IEC 62305-2
The separation distance, worked through
Read →IEC 62305-3
What decides whether an SPD actually protects anything
Read →IEC 62305-4
Calculators
One calculation each, free and without an account. The derivation is printed with the answer.
How each study is validated
See which calculations are reconciled against published examples, which checks exercise the software and geometry, and where validation has limits: