Main fuse tripped

TMSG

@Section62 Well, as I said, I've something important and interesting learned and that w/o real cost to me. So a good day's work

Thanks to all for the responses, appreciated!

Risteard

GDB2222 said:

TMSG said:

One practical reason why I'd like to get some idea about why and how this happens is that I am often away for a couple of weeks, sometimes longer... and if the RCD trips while I am away, the contents of the freezer will be in an interesting state when I return. I am not keen to experience this

It takes barely any residual current to trip the RCD. 30mA on most RCDs. So, a tiny trace of water can cause that. 

I suggest that you disconnect whatever kettle you have before leaving for two weeks.

Actually, it's anywhere between 15mA and 30mA for a nominally 30mA device.

GDB2222

Risteard said:

GDB2222 said:

TMSG said:

One practical reason why I'd like to get some idea about why and how this happens is that I am often away for a couple of weeks, sometimes longer... and if the RCD trips while I am away, the contents of the freezer will be in an interesting state when I return. I am not keen to experience this

It takes barely any residual current to trip the RCD. 30mA on most RCDs. So, a tiny trace of water can cause that. 

I suggest that you disconnect whatever kettle you have before leaving for two weeks.

Actually, it's anywhere between 15mA and 30mA for a nominally 30mA device.

I’m not surprised there’s a tolerance. The 13A fuses in plugs will pass over 20A more or less indefinitely, and that’s according to the BS1362 standard.