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No need for a box if properly made spicelines are used and pushed up as suggested. Wago connectors are also worth a look and will join cable to flex. Also from Screwfix (amongst other places)

Intelligent designers specify a hot water loop circuit back to the hot water cylinder, with a pump connected to a motion sensor in the kitchen, with all pipes insulated. Oh dear, yes, we've gone off on a tangent to electrical work, but still very interesting. However, the statement above...

Quote: I doubt you'd need a switch fuse for the shop supply? Yes, otherwise to isolate the shop CU would mean turning off the supply to the flat. This may not be a regular event, but could be a considerable problem to both parties.

The photograph is too dark on my screen for me to see clearly, but it does look like a Henley block at the side of the meter. The white switch is just that - an isolating switch - so you would need to take the tails from that switch to the new Henley Blocks. From here you'll have two sets of...

These are not flats but this is a house in multiple occupation so fireproofing of the entry points, under staircase areas etc needs to be taken into account in any plan. That said, the simplest way to provide a separated supply to the upper units would be to take the incoming supply from the...

The fan is the load. Switch will say Load on one side and input/feed/source on the other. Two wires from fan go to L and N on load .

No! Condensing dryers are designed for a different reason. The big problem with boiler fed washing machines is the loss of heat through pipework (not a worry maybe in winter) and the tank (if used). Turn on the machine and cold water from the pipe flows in followed by water from the tank /...

Depends on what your wall is made of and how thick. I wouldn't suggest trying to cut out for a backbox if it is a single leaf wall (as in most garages); however, if it is lean -to and the wall is against the house or it is a cavity wall then no problem.

That sounds bad. No way should that external wall vapour barrier be damaged. Not only will you get cold air in as you describe, but there will be a real risk of interstitial condensation. An airtight box would stop the cold air reaching the room, but behind the wall surface there will be a steep...

If it was my research, I'd start by testing just how much air would get through a normal socket or switch. These are on internal walls with insulation between inner and outer leaves and cannot be compared with letter boxes or gaps to the external air. Those gaps introduce cold air which needs...

The steel joist will act to disperse any heat, so better let it touch the metal rather than separate (no sharp edges of course).

Sarah, Please forgive my personal approach, but have you become pregnant? The difference between men and women when hearing high pitched noises is quite noticeable and generally younger women/girls can hear much much higher frequencies than their male counterparts. This becomes more of a...

It looks as if the 'extra' cable just goes to the second light. So, you have in and out of the lighting loop circuit (2), switch cable (1) and to other luminaire (1)

Also few DIY people will have a testing unit, so the check on live proves that the tester is working.

Cigaro is right about the likely cause, but please turn off all power. Once ALL the power is off you can cut away a little of the plasterboard and see what damage has been done. Be careful as there may be another cable in there (which is why all power off not just the lighting circuit). With any...

A spur can be taken from a spur if the whole is through a FSU so limiting the total current to 13A. The most important aspect of earthing is to have a low resistance to flow from a fault to earth, so a wire taking fault currents back to the house earth can be better or worse than taking the...

Yes, the common way is to use a metal box with glands which hold the cable and armour securely then the wires are connected to the circuit. Sizes of glands vary to fit the cable. There are pictures on the TLC website. Some garage units will be made so that armour can be introduced, again via the...

You don't need another RCD for safety, but as you say, a problem in the garage would trip the whole house. This may be why the shed was disconnected. To get over this two different types (30/100mS delays) of RCD are needed. Simply putting another 30mS one in the garage might not work as the...

It doesn't sound good, but assuming that you want to restore power to the shed, a few questions need asking to get you started.... Can you work out the size of the cable to the shed? Does the armoured cable actually go into a backbox with a socket on the front; i.e. was that cable just...

No expertise, but had a similar problem with a spin dryer and the fault was a capacitor linked to the motor.