Canadian Electrical Code

Rule 4-004 18

4-004 Ampacity of wires and cables

When the load factor of the installation load is known to be less than 1.00 and is supported by official documentation, the calculated ampacity of und...

Unlock the Full Rule Analysis

This rule has been fully audited and analyzed. Log in to ask Henri for exact calculations, exceptions, and job-site requirements.

Ask Henri Now
🧮

Smart Calculators

Henri uses this rule to automatically calculate wire sizing, voltage drop, and box fill.

🔍

Cross-Referenced

Instantly view how this rule interacts with Utility Manuals and Appendix B.

⚡️

Jobsite Ready

Accessible via mobile with offline caching capabilities for remote locations.

Email UsFacebookInstagram
PRIVACYTERMS
Solidmind is an independent tool, not affiliated with or endorsed by the CSA Group or the Régie du bâtiment du Québec (RBQ). The information provided by Henri and our reference tools are for informational purposes only and do not replace official provincial or territorial electrical codes. While designed to help, they may not always be 100% accurate. Always rely on your professional expertise and primary source documents to ensure compliance and safety.

© 2026 ™ Solidmind. All rights reserved.