Canadian Electrical Code

Appendix B - Rule 28-210

Instantaneous-Trip Circuit Breakers

Instantaneous-trip circuit breakers are defined as devices that operate on a magnetic-only trip mechanism, lacking any inherent time delay. They may,...

Unlock the Full Appendix

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

Ask Henri Now
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.