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It probably doesn't matter if:
The power to the PID is after the power switch (so that it's only receiving power when the rest of the components are, not just when the machine is plugged in)
The power to the PID also has the same circuit protection that the rest of the components do (fuse) -
Not sure which guide/advice you're following but I've piggybacked off the switch wiring in the past thanks to an online pdf by Auber, who also make a kit for these machines.
rpm
Kalkhoff
@allsop
I have an annoying PID question...
DIY'ing a PID to my Gaggia Baby Millennium and need to piggyback live and neutral wires to power the PID.
I've found the live and neutral mains (with a multimeter no less!) running from the main power outlet which both run to the power switch on the front of the machine. Presumably I can simply piggyback off these connections?
Various guides say to piggyback the live mains at the power switch and the neutral mains at the outlet itself, but this would mean trying to piggyback into a terminal box, which doesn't feel good...
It would be much simpler to tap both live and neutral at the power switch (mainly because there's a lot more room), but is there an obvious circuitry based reason why I shouldn't?
Note - fully aware that people won't want to give electrical advice, this is from a paper based, circuit only perspective!