Contact us
Questions, corrections and requests all reach a real person. ElectricalCharts is a small independent publisher, so email is the fastest route.
The best way to reach us is by email:
We read everything and typically reply within two to three business days. Please include the page URL when writing about a specific number — it saves a round trip.
Data corrections
Found a value that disagrees with a standard or with your code edition? Send the page URL, the value you saw and the value you expected. Correction reports get priority.
New charts & calculators
Tell us the number you were looking for and could not find. Requests that come up repeatedly get built.
Advertising & partnerships
We run display advertising and labelled affiliate links only. We do not sell placement inside charts or calculated results.
Privacy requests
For data access or deletion requests, email us with the word PRIVACY in the subject line. See the privacy policy for what is collected.
Before you write about a calculated value
Most disagreements come down to assumptions rather than arithmetic — ambient temperature, conductor termination rating, number of current-carrying conductors in a raceway, or a local amendment. Our methodology page lists every assumption each tool makes. If it still looks wrong after that, we want to hear about it.