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In the UK the connection between neutral and earth is not done by the consumer, however when the supply is local it does need doing in the consumers' installation, so with solar panel inverters there is a relay to connect neutral to earth when the DNO supply is lost. I can't find a ref to...

The one, two, and three channel versions of programmable thermostats may use the same back-plate, but are not wired the same, and I would not have expected terminals 1 and 2 to be connected to anything with a S Plan with two channel version only a Y Plan tends to use DHW off.

I inherited a battery pack, the air pump has failed, and the 12 Ah battery did in the end fail, but replaced the battery as it is so easy to carry around, has a small fluorescent lamps, and a 150 watt inverter, and a handy cig socket, so anything designed for a car will run from it, and a wall...

I would say load can be left disconnected. The problem is with stage charging if it drops to final stage when the output drops to say 1 amp, and you're drawing 1 amp it can't drop into final stage and can overcharge the battery. 1) At that output, unlikely to overcharge a battery. 2) You're...

I also have 2 x 2 port valves, and mine is C Plan. The plan you show is missing the by-pass valve, but is the basic S Plan. I have a spare micro-switch for my motorised valves, but changing it is not easy, I would want to swap the whole head.

I started around 1965 looking at caravan electrics. At that time, all the battery did was work the water pump, replacing the rubber dome in the floor that I pressed with my foot, lighting was with gas, so was heating, the latter making the caravan very wet. As times has gone on, we have moved...

The likes of the Rufford wind generator uses furlmatic design to bring it out of the wind when wind get too strong, so don't produce either with no or very high winds, they were used on the Falklands which is known for being windy, but to run an electric fence back in late 80's early 90's when I...

Even with massive storage, the heater can be a problem, son with a narrow boat, engine running in the day, 350 Ah of lead acid batteries, and the heater failed before the morning. The alternators 2 x 60 amps, were voltage regulated, around 13.8 volt, so only producing around 5 to 10 amps after...

In most cases' no, but in my house yes, one TRV head is linked and can cause the boiler to fire. This house had all sorts of problems with central heating when I moved in. My plumbing skills are very poor, so I got a plumber to do the pipework, could not believe it when he admitted he did not...

I have had a faulty socket, but that is rare. The main reason for a socket to fail, is the 3.5 mm screws have hit a wire when screwing the socket into the box. Working on electrics, one must test what one has done, but these are not cheap, likely cost me around £150 to get the test gear, and...

1 kW of solar panels, will give you around 66 kWh per month. Judging by mine in Mid-Wales. To have a three kW item run, you need around 3.2 kWh of solar panels with a lithium (LiFePo4) battery. So 120 watt will not be enough much at all, I have 6 kW on my house roof, so 120 watt is about enough...

This video explains how the motorised valve works. 5:37 shows the switch, the thermostat or programmer works the motorised valve, and in turn the valve works the boiler, so if the micro switch sticks, the boiler will not turn off. My boiler had the same problem, I unclipped the head, gave it a...

Yes, at 74 I realise some improvements not worth doing, will not get paid back in my lifetime. But it was my mother who with eyesight problems and dementia, who seeing an extension lead flickering red thought it was on fire, and put it in a bucket of water, made me realise how important RCD...

Thank you, @AndyPRK what I was trying to say, is before looking at new consumer unit, relays etc. Need to work out what is the best way forward, what I did was work out what I want in 5 years time, then what steps to take each year to get there, so I am not fitting anything which will need...

I found the tariff question not as straight forward as I would have liked. It needs some careful sums. The peak tariff, is higher than a standard tariff, it varies area to area and provider to provider, but if we consider standard at 25p, off-peak 20p and peak 30p then simple maths shows half...

No. You can either pressurise the hot coil or you can use a power shower, either way tank not pressured, look at the diagram I put up.

I had a CU fitted with no pre-testing, and there was one borrowed neutral, really selecting the wrong line, but I am an electrician just wanted person doing the job to do bits I am no longer able to do, and I have no problem finding the problem and correcting, but I knew I was taking a chance...

As said, the boiler seems grossly oversized, my three-story house has a 20 kW boiler. Years ago I fitted wireless tank thermostats to my dad's house, but when I tried with this house, I could no longer find any for sale. I see non-vented cylinders as a pain, last thing I want is to have the...

Today can all be done wireless. The likes of Drayton Wiser the TRV on each radiator is programmed, the idea is every room is independent. The whole idea hinges around modern boilers gaining the latent heat from the flue gasses, to do this the return water needs to be cold enough, so the boiler...

I would say it's a battery lamp someone has stuck a plug on. As yes should be returned.