Editorial Policy

This policy describes how the calculators, reference pages and guides on Standard Clarity are produced, checked, and kept current.

Sources

Every tool, reference page and guide is based on published, primary sources: the engineering standards themselves and the equations, test methods and tables defined within them. These include IPC-2221 and IPC-2152, IEC 60529, IEC 60664-1, IEC 61010-1 and IEC 62368-1, UL 94, NEMA 250, ISO 20653 and ISO 22810, and the NEC, among others. Where a standard is paraphrased or summarized, it is to explain method and intent. Official standards texts are not reproduced and remain the property of their publishers.

Where a primary standard sits behind a paywall, its parameters are corroborated against first-tier industry references, such as accredited test laboratories, standards-body explainers and established component or enclosure manufacturers, and any figure is recorded before it is published.

How calculations are produced and checked

• The standard's own formula is used wherever one exists, with its published constants.
• Results are verified against worked examples and known reference values before a tool is published.
• Where a standard presents its data as charts rather than a closed formula, any interpolation model used is identified and its limits are stated.
• The governing standard and clause are shown on each tool, so any figure can be traced back to its source.

How reference and explainer content is produced

Alongside the calculators, Standard Clarity publishes reference pages and explainers, such as the standards guides and the IP rating pages. They follow the same discipline as the tools:

• Every technical figure, test parameter and limit comes from the primary standard, or is corroborated against first-tier industry sources where the standard is paywalled, and is recorded before publishing.
• Each page names and links the standard it explains, and separates what the standard actually specifies from the common misreadings of it.
• Comparisons between ratings or standards describe how the underlying tests differ, rather than presenting one rating as simply higher or better than another.

Accuracy and validity

Standards are derived under defined conditions, and results outside those conditions are extrapolations. Each tool carries the validity range of its method and warns when an input falls outside it. Many methods are deliberately conservative, and where a newer standard gives a different result for the same question, both are noted. Results are an engineering reference and a starting point, not a substitute for the standard or for professional judgment.

When standards disagree or do not map cleanly

For some questions, more than one standard applies and they do not agree. IPC-2221 and IPC-2152 for trace current capacity are the clearest example. A related case is the relationship between IP codes and NEMA enclosure types, where the two systems map in one direction only and cannot be converted back cleanly. In those cases the content presents the established method by default, notes where the alternative differs, and links to a page explaining which to use and why. We do not silently pick one and hide the other.

Corrections and updates

Accuracy comes before completeness. Standards are revised over time, and content is reviewed and updated to reflect meaningful changes. If you find an error in a calculation, a formula, or a reference value, please report it through the contact page. Corrections to the numbers are prioritized and made promptly.

Independence

Editorial decisions, including what a tool calculates, which method it uses, and what it reports, are made on technical grounds alone and are not influenced by any commercial relationship. Standard Clarity is independent and not affiliated with any standards or certification body. Standard names are used only to identify the documents the content is based on.