Regression tests and independent checks
For tools with both PHP and browser implementations, shared cases check that their results agree within the stated tolerances. Server-only tools are checked on the server. Tests cover supported inputs, unit handling, rounding, invalid inputs and boundary cases; the checks available differ by tool.
Agreement between our own implementations is not an independent reference or professional certification. Reference values still need traceable sources, applicable conditions and separate expected-result checks. A passing software test does not establish that a proposed electrical installation is safe.
Publication is a separate decision
Drafts, source evidence, reuse decisions, editorial review and owner approval are checked separately. Changing reviewed content requires fresh approval. Unfinished and safety-held pages remain private; a local preview is not a published or professionally approved answer.
What this page is not
It is not a laboratory accreditation. It is a record of how this site refuses to invent a watt, an amp, or a breaker size. Report a mismatch on the contact form.