Recent content by shortshrift

Hi All, I have a 5 year-old 210 litre OSO 20 RI unvented water heater. The cylinder now only runs the showers in the house for about 15 minutes total (normal showers with fairly modest flow) before they run cold. My prior experience of the OSO was that under normal conditions it didn't...

I sometimes turn up old threads in a Google search - a question is asked, there's a bit of discussion, but the OP never comes back with the final resolution. In that spirit: Called in the electricians, who tested the circuits with a multimeter [Hmm. Could have done that myself. I had asked...

JohnD - RCD adaptor... thanks, I'm sure that would make a useful fault-finding tool, and much cheaper than the earth-leakage clamp meters I was looking at. martinxxxxxx - Have turned off the boiler for the time being (this is - as you point out - Argyll, though; will reconsider when the...

JohnD, Thanks. "it's usually water." I bet. I still have some money on the CH pump because it did smell overheated first time the RCD went and because the tripping did disappear for some while after I bled and repressurized the system. Two other thoughts that occur: (1) With damp in a...

Chri5, thanks. All good stuff! Unfortunately I have had 10 days between trips (which led me to think I'd fixed it), and then... Given which, it's a very slow business to exhaustively exclusion test since you only get a data point in the event of a trip and the test circuit has to remain...

Thanks for the replies. My thinking on the time-delayed RCD is that while the RCBOs will trip on N-E faults, single pole RCBOs will do nothing to isolate the fault: they'll trip, but the N-E leakage will continue all the same. So a double-pole RCD is additionally needed to gain full...

I've been plagued by intermittent RCD trips in the last few weeks - 12 to date, sometimes 4 in a day, sometimes nothing for 10 days, the irregularity making it impossible to identify the failing circuit by exclusion. Clearly I'm going to have to get an electrician in, but if he can't rapidly...