Contact

Email contact@voltagedropcalculator.co. There is no contact form, on purpose: a form needs JavaScript and a server endpoint, and this site runs without either.

Corrections are the most useful thing you can send. If a figure on any page disagrees with the code book in front of you, say which page, which value, and which edition and table you are reading from — that is enough to check it and fix it. Every conductor figure here is transcribed from a published table, so a transcription error is entirely possible and worth catching.

Broken links, a calculator that returns something obviously wrong, a page that will not render on your phone, or a chart that is missing a size it should list are all worth reporting. So is a request for a calculator or reference the site does not yet have, though there is no promise attached to it.

This site does not give advice on individual installations. A question of the form "here is my situation, what size wire do I need" cannot be answered responsibly by someone who cannot see the job, the equipment, the existing wiring or the local amendments that apply to it, and answering it anyway would be worse than not answering. Those questions belong with a licensed electrician in your jurisdiction, or with your local inspector, who is the one who has to sign the work off.

The calculators and the reference pages exist precisely so that you can work the numbers yourself and take a documented result to the person who will do the job.

This is a small site run by one person, not a support desk. Expect a reply to a genuine correction within about a week, and treat anything longer as a sign it was missed rather than ignored — a second email is fine. Sales and link-exchange email is not answered.

For data questions relating to this site, the same address applies; the privacy policy sets out what is and is not collected.

Last updated: September 2026