ECN Forum Forums General Topics of the Trade General Discussion Area Wiring contactors instead of shunt trip breakers

Shunts need the voltage to open.Use a mechanical contactor N/C (like a lighting contactor).Or go back to the distribution panel and add a Main ST breaker.

Remember, what ever you use it MUST need to be manually reset.

NFPA 17A
4.4.3.7: Shut off devices shall require manual resetting prior to fuel or power being restored.