Stack Exchange network consists of 178 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
View all activity pages
I have seen this issue where the 1st circuit breaker was less sensitive than the 2nd breaker. Having said that, your 'splicing' looks messy, especially it looks like you have bundled the ground(earth) ...