RCD tripping

[SparkyLabs]

Typically a master RCD is fitted rated at 100mA. This won't save your life but is an overall protection of gross faults. After that any amount of 30mA RCD's are put on separate circuits. I don't know if you can say get a 60mA RCD. Or maybe you need to fix the equipment. The 30mA will cut out at less but with a longer fault. It's about how much for how long that the human body can withstand.

Sent from my phone so mind the autocorrect.

[cropwell]

10, 30 and 100mA seem to be the common RCBO's. You could put a 10mA on the kit, but you would probably get it blowing all the time. If you have carbon build up in the motor you can get a trip from the back-emf leaking to earth, so it wouldn't hurt to blow out the motor, assuming it is the brushed type. Else you might have damp dust in the electrics somewhere, so again a clean out with compressed air could help.

Happy New Year


Rob

[Saracen]

Many thanks for all the comments.

Today the RCD blew mid-morning, without me even having been down to the workshop. By a process of elimination, I have found that an external 13A socket we never use had suffered from water damage.
I think that the water has entered the MICC which provides the supply to the workshop, and now the trip will not stay energised, even with the workshop consumer unit disconnected.

Looks like I need to either get the MICC repaired or have the whole lot replaced with SWA :-(

It may be that this water seepage has been going on for a while, so may have contributed to the earlier RCD trips.

Adrian.