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Yes the stat and cut out have continuity/no continuity when they are below or above limit. The cut out seems to go randomly. Also the supply is fine.

Sorry no photo atm

1. That's correct 2. Yes Hopefully it will do the trick, I don't see how it wouldn't. Unless the new stat is faulty. I've got a TS230 Dual Safety Thermostat as a replacement. Is this ok? All I have to do is wire straight into the new stat, missing out the cut out.

Thanks for the replies so far and I realise the importance of hot water safety, but I still need to know whether I can replace the thermostat and cutout for a dual thermostat that does both?

Thermostat is set to the original setting under a dot of paint, about 60 I think. Cuts out at different temperatures

Hi all, I have a standard vented copper hot water cylinder, less than a year old, with one immersion for hot water only, no boiler. The immersion heater has a cut out in the body of the immersion and a separate thermostat. The cut out keeps tripping for no apparent reason. The thermostat...

No, I agree with you, I just can't see it conclusively written anywhere.

Just a quick question.. At which point on a light fitting do you measure its height to the floor? I have a light fitting outside the shower enclosure but within 600mm of it. It is fixed to the ceiling at 2.4m The 3 adjustable spotlights on the light fitting are 2.2m from the floor when...

That's good advice ericmark. Unfortunately the generator installer isn't local, probably a mistake, but it is what it is. Incidentally, the whole of the outbuilding installation is on a TT system, not just the standby generator.

Is the system I described not TT then?

That's not what I meant, but I understand what you're saying.

I'm not sure this does apply, as there is a cable from the CU to the ATS and then to the downstream RCBOs. I think having read these posts, that a time delay RCD is the way to go. After all I'm simply trying to avoid one faulty pump from tripping the whole lot (which defeats the object of...

There is a separate CU in the outbuilding for lights, power etc, all on their own RCBOs.

I'm guessing from the replies that maybe if the cable to the ATS had been armoured or in earthed ducting then we could eliminate the first RCD?

Thanks davelx, see above ⬆️

The cable from the 32A RCBO to the ATS is 4mm H07 ducted straight through the outside wall (it's a basement) into the ground and ducting comes up inside generator shed and straight into the ATS. 3m run max.

Sorry, the RCD is not on the SWA. It goes: Main house is on TNCS 100A supply phase 1. 40 switch fuse is on phase 2, no RCD, which feeds the SWA going to the CU in the outbuilding. The SWA goes straight into the CU The earthed armour is not connected to this CU. This CU has its own rod earth...

Thanks. To clarify, the main house is TNCS. A 40A submain from the main house feeds this secondary residential outbuilding which is not connected to the earth of the submain cable but instead has its own earth rod. The generator is just for the pumps, which are sited next to the outbuilding...

Hi all, This may be an easy one to answer, but might be hard to explain... I maintain a residential property which relies on three flood water pumps to avoid being flooded when the water table is high. The electrician has fitted an ATS generator. As the building is remote from the main house...

I hope this is posted in the right category. I live in an 1890s detached house, next to a similarly aged detached house. Our roof water goes down a gully into a manhole on our neighbour's side of our house. Imagine an alley way between the two houses, that's where it is, although it now forms...