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Changing a CU without doing at least some inspection/testing first, can put the electrician and their customer in an awkward situation, For a few reasons. 1. By installing a new CU the electrician inevitably assumes some level of responsibility for the wiring supplied by it. Some pre-existing...

Is the cap of that lampholder make of metal? or is it plastic that looks like metal? If the former than that construction looks like an accident waiting to happen with half-assed wire terminations only millimeters from a metal part!

Does anyone know what those white boxes that look kind like meters but without any cables coming out the bottom are?

Is there any information on how exactly they came to be electrocuted? did they drive screws through cables? was the insulation touched by loose wires?

I've only tried the minigrid and architrave versions of the quinetic switches. They seem to make about as much noise as other plateswitches (much less than a pull cord).

AIUI generally the signalling voltage is within the "ELV" voltage band, but it's referenced to the neutral conductor. So in the event of a lost-neutral or an upstream polarity reversal it could become live at mains voltage.

black. The only mains cable/flex I've seen with a white conductor was/is american (american 4-core flex seems to be red/black/white/green).

I would not bet on the pictures on amazon being accurate. 4-core flex with a blue conductor certainly exists, I have some in my garage that I *think* came out of a maplin offcuts bag bought sometime in the 1990s or early 2000s. However since grey conductors became a thing in the mid 200s...

I recall reistard claiming that oversleeving a line-coloured conductor to use as a neutral was not permitted in the republic of ireland. If-so that would presumably mean a special cable type was needed.

No, it's collecting stuff from the internet, using that stuff to generate model weights and using those model weights to come up with confident, plausible-sounding answers. This process is quite capable of generating new bullshit that did not come from any human.

IIRC there is a regulation in BS7671 about dividing an installation into circuits to "avoid danger and minimise inconviniance". IIRC in older editions of BS7671 this regulation didn't explicitly mention RCDs, in newer editions it does. Given that in my experiance RCD trips are about as common...

Conversely, the presence of thermal damage to bonding conductors would be a massive alarm bell.

Bonding conductors can carry two types of current. The first is "fault currents", a fault happens somewhere and some proportion of the fault current flows through the bonding system. IIRC in a domestic/light commercial setting, a 6mm² bonding conductor will almost-certainly be enough to handle...

There is clearly the risk that such a device will increase the time from a fault being detected by a RCD to the power being shut down. Particularly in the case of single pole RCBOs. Double pole RCDs/RCBOs mitigate this somewhat but ideally an inverter would not be on the same RCD as any...

The sad fact is there are few cast-iron rules on coding, there is lots of industry guidance but industry guidance is not the law, it's not even BS7671. BS7671 says something along the lines of "installations designed to previous versions of this standard are not necessarily unsafe for continued...

Given the headline says "Make unlimited calls to UK landlines and mobiles with our optional Calls service. " and their FAQ also says they exclude "premium rate" numbers I'd guess they don't want to be bothered with per-minuite phone billing. As well as the technical complexity, IIRC there are...

FTTC and FTTP and dedicated fiber services share the same cables from the exchange to the aggregation node. Beyond that the three systems use seperate cables (though they will almost certainly share ducts and poles). I'm 99% sure that the aggregation nodes were built with FTTP in mind, even...

Yup Afaict there are four parts to an openreach FTTP connection, exchange to aggreation node, aggregation node to splitter, splitter to DP and DP to customer. Exchange to aggregation node was built out as part of the FTTC rollout. Aggregation node to splitter node to DP is normally built out...

Doesn't entirely surpise me. I suspect BT retail assumes that normal residential customers buy their phone and broadband as a bundle. For phone/broadband customers the main way to "encourage" customers to switch seems to have been offering them new deals. and burying in the fine print of those...

The cables from the exchanges to the aggregation nodes are used by both FTTC and FTTP. The cables from the PCP cabinet to the customer are, for the most part, existing cables from the pre-fiber era. That leaves the cables from the aggregation nodes to the FTTC cabinets, the fiber cabinets...