Two parts to this question:
1) Curious, why do the 4 breakers in my CU labelled as "down sockets" have different current ratings? Two are 32, one is 40 and one is 16.
If they are four ring circuits then why would they be different?
2) What has kicked this off is that I have just got a 2000W table saw in the garage and it trips the 16A breaker every time I try to use it. Research suggests this is very common and is due to the start up load of the saw spinning up being high.
Suggested solution is to change the breaker for a C type rather than a B. But would it also make sense when doing that to change it for a 32A one, or is there a reason a 16A has been specified for that ring?