[ingvul]

> Like if production is down how can you say: "My 40 hours is up this week, I'll look at it on Monday".

It depends. If it's the first time production is down and I'm already off, I fix the issue. Once it's fixed I'll tell my manager: "we need on-call people. Please don't consider me for that position because I value more my free-time than money. Thanks". The second time production is down, I won't fix it.

If they fire me because I don't do on-call, then again it depends. I would revisit my contract and if it doesn't say anything about being on-call I would point that out. In any case, I would start to look for a new job asap.