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Note it only says an RCD can't be the sole protection. I can think of a number of reasons, or possible reasons : * An RCD doesn't give any overcurrent/fault protection for a L-N fault. I haven't looked at the regs, so in this context is that a valid reason ? * As I've mentioned, while there is a...

The detection mechanisms are different. MCB, the magnetic field pulls on the trip mechanism - more field, more force. It also operates at high currents, so would need a massive DC component to come anywhere clise to the AC component. RCD, there is transformer action where rate of change of...

That's probably easy to answer. A DC component will add to the magnetic field on half the mains cycle, and subtract from it on the other half. So in extreme it could delay tripping by half a cycle ... approximately. Worst case the fault occurs late in a half cycle - so doesn't trip. The next...

LPG is one of those "here be dragons" things. There's still a lot of ignorance and misinformation going around. Some garages may refuse them simply because they don't have the skills/knowledge to handle them safely - not, as pointed out, there's similar risks with petrol (also heavier than air...

I had assumed absence of a functional CPC. You can never rule out a parasitic earth path via a person ... If you consider what's in an MCB and an RCD, there is going to be a massive difference in PFD (probability of failure on demand) - I'd guess an order or two difference. Essentially, you've...

Just my 2d worth. Another vote for Aico. I too prefer hardwired if possible, but you can mix & match with Aico. In the flat, I have two heads on one hardwired circuit, and a head and test switch hardwired on another. Two heads have radio modules which link the two circuits. One annoyance is that...

I took that as someone bought it from Temu, but I see now - a freeby from Temu. They need telling it's dangerous junk - though I suspect they have a filter for that straight into the bit bucket.

A cloth is better as you can clean the cable without getting your hands sh...dirty.

Free gift from whom ? If it was a business, need to tell them they've broken multiple laws - and they need to recall any others they've given away. If a family member or friend, I'd suggest they need to send it back and report the seller.

You've mentioned a lack of space, do you have a basement/cellar ? If not, is there any space under the ground floor ? Just looking for an alternative location for your break tank and pump - to free up space for a hot tank (unvented cylinder or thermal store).

You need to read the display on the meter not the in-home display - that doesn't update in real-time.

You'd setup the boiler's heating connections to an S-plan. That has two (or more) 2-port zone valves to direct the water as required. As a minimum, one zone for heating, one for hot water. When there is no call for heating, that zone stays off - and the boiler will just run when needed for hot...

It should be insulated, but builders do all sorts - including just throwing some pipes down and pouring concrete.

Except those which are designed to be able to disconnect the mains and operate in isolated mode. Some need configuring for one role or the other, some can automatically do it.

We've got a number of sockets where that isn't the case. Worst case we have to move furniture to unplug, but can reach the switch.

I'm thinking that if you are going to be running an extension, moving plugs, etc. then it might be easier to just plug the genny into the inverter. There would then be the option of charging the battery for a short time and then stop the genny - probably more fuel efficient overall. BUT that...

It's really irrelevant whether the socket is SP or DP switched - for isolation you pull the plug since I can't recall ever seeing a domestic BS1363 socket with anything remotely resembling a lock off facility. Do we bother ? The days when the DNOs came round disconnecting local earth rods when...

Your options are to manually change the connection and manually start the genny, or install an ATS (automatic transfer switch) so the inverter can switch the input from mains to genny when needed (and start the genny if you install the remote control interface).

As I view the diagrams, no you do not need to cut any joists. In fact, you MUST not go cutting 125mm holes as you'd destroy the strength of the joists. Also, you'd not be able to thread a rigid pipe through. Taking another look at the materials list, it looks like most of the ducting is 75mm...

That's an interesting thought. Irrelevant since you have full isolation with the plug out - even with an unswitched socket. And there's something to be said for not having a handy switch on the heating. So ? If it has no electrical connection, iit probably doesn't need an earth. If it's...