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Noted. As I say the Valiant installation manual I have does not require an RCD, but does specify the type if one is fitted.
I would say that the document above could be read either way however if you read it as RCD mandatory then a fuse is also mandatory and hardly anyone is going to fit one of those. Thus I would personally refer to the installation manual for clarification.
This was a bit of a nightmare when I discussing my install with the provider. However, the install manual also stated that I need this:
2024 build bungalow, Southern England, 179 m2, 14w/m2 Underfloor heating, fully open
Vaillant aroTHERM plus 3.5kW
50 litre volumiser
3.6KW solar panels
Noted. As I say the Valiant installation manual I have does not require an RCD, but does specify the type if one is fitted.
I would say that the document above could be read either way however if you read it as RCD mandatory then a fuse is also mandatory and hardly anyone is going to fit one of those. Thus I would personally refer to the installation manual for clarification.
This was a bit of a nightmare when I discussing my install with the provider. However, the install manual also stated that I need this:
Same as I quoted, no requirement for an RCD to be fitted but if one is fitted then it must be of a specific type. I think that's very clear and also entirely logical.
Not sure why they use the word 'fuse'. Most installations will use MCBs these days. Maybe it's a translation from the German or Czech.
4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.
@transparent. It looks from the picture posted earlier as if this RCD is fed from the main cu. That being the case perhaps there is an MCB in series there
4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.
There is NO MCB in the main consumer unit for the heat pump.
So I'd be interested to know where the feed to the new CU is supplied from... ... and what size cable it has between the two units.
Sorry missed that. It's pretty obvious from the photo that this RCD is fed from the main cu, but if there is no MCB then, as you say, what protects the cable?
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