In article o.uk,
Dave Liquorice writes

The RCD is for shock protection. Pretty sure that has to be 30 mA.

100mA ones are for circuit protection and normally time delayed to
provide discrimination against downstream 30 mA shock protection
RCDs.

Ta.

We had a computer suite with ~15 PCs which regularly tripped the 30mA
RCD feeding the room. I'm pretty sure the sparky's fix was to change
the 30mA RCD for a 100mA one.

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