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Last seen: Jun 16, 2026
Thanks @toodles for delivering the full text. I'm getting most of the Derril Water story from elsewhere, but I'm missing the crucial source referenc...
No. The shape of the waveform has no bearing on the decision to use an RCD. BTW. I'm still unsure why you're making "DC Component" into a...
Erm... I can interpret that question in more than one way, so I'm unsure of the angle you're taking. All Type-B RCDs and RCBOs will correctly trip i...
Thanks Tim. That SolarEdge data also shows voltages above 253v. But we don't know enough to tell what's happening. Eg Is the voltage falling aga...
I don't believe it's in the Vaillant documentation. I can see no functional advantage in a heat-pump being supplied via an RCD. It's purely a prot...
The additional profit being made the installers.
The issue isn't DC leakage. Type-B RCDs and RCBOs will trip correctly despite the waveform having a DC component present. You need the contacts to...
I just read that article, @jamespa It seems the bodies are beginning to pile up...
OP wrote: 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.
Hager CDB540HP is a Residual Current Circuit Breaker. Here's the English text in the Installation Manual.It measures current which leaks to earth. ...
I'm 90% certain that the device you have does not operate as over-current protection. The number of Amps stated on it are the rating of the contacts...
There's usually a group of people on the beach at Dover who know what details can be used to populate option-fields in UK Government forms.
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Latest Posts
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@transparent Contractors for elements, I like being han...
By chastity_outward053@simplelogi , 7 hours ago
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RE: Heat pump installation quotations
@majordennisbloodnok We have a sort of inflatable ru...
By Batpred , 8 hours ago
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RE: GivEnergy inverter tripping due to over-voltage?
The symptoms you describe can be accounted for by anoth...
By Transparent , 8 hours ago
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RE: Harvest Thermal - ASHP with a smart thermal battery
@etchedpixels My comment was in reply to @jamespa comme...
By Toodles , 15 hours ago
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RE: Heat pump done right first time? Installation in Kent.
Thank you for that, @wanttobegreen. Information like th...
By Majordennisbloodnok , 17 hours ago
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Floor standing brackets for K3 rads
My neighbour is a plumber and said I would need to fit ...
By Singlespeed , 1 day ago
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After an intense recode, I’m pleased to announce that w...
By Mars , 1 day ago
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Hopefully this will answer your question. To...
By ASHP-BOBBA , 1 day ago
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RE: Help me keep the faith with my air source heat pump installation
I would be interested to find out if others do this and...
By ASHP-BOBBA , 1 day ago
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Don't you dare. You just carry on as you are; as @batpr...
By Majordennisbloodnok , 1 day ago
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RE: Heat pump design review please: 5 kW Vaillant aroTHERM Plus heat pump
@ragtime27 some rooms in our house only have one place ...
By Judith , 1 day ago
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RE: Several AC coupled batteries
That is a good point, a manufacturers can stop trading,...
By Batpred , 2 days ago
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RE: Indevolt Batteries UK Support & Info Thread
Hi @hanno - good question. The range of hybrid invert...
By Transparent , 2 days ago
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