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Yes you have the essence in a nutshell. Subject to satisfactory testing of the circuit, by description, the installation is compliant to a very old version of  the wiring regulations, it is not compliant with the much safer regulations now in place (though there is no requirement to update...

If the kettle electrics have got wet then there would be a fairly high resistance path from Live through the water and so to the body of the kettle. A high resistance test meter might measure 240V from the kettle body to a good earth such as a sink, not usually just the water on the counter, as...

You would need to know the cross sectional area of the cable you have. As it is for a vacuum cleaner they are likely to take (unless it is old)  about 4-5 Amps and a 1mm² cable would be OK for that current but the cable is often then a bit physically thin for the manual stress they are...

They are what I would call an uninsulated cord end ferrule with insulation strain relief. (or wire end ferrule in the US) They are used in production all over the place but seem to be hard to obtain in a retail scenario. The ferrules you picture also require a specific crimp tool to close them...

It would not be straightforward to just change the switches because the incoming power supply and the outgoing switched line join the wiring at a separate point (probably at a light fitting).  Though the brown and blue in the connector block at the ground floor looks like something was changed...

Black H07RN-F cable would be suitable and would be the preferred cable for this application, however it is thicker than H05RN-F and may not fit through the existing cable entries in the product, but you must not reduce the conductor size. H05RN-F cable is the same type as "pond flex" 3183P this...

My thoughts are in red below, these are just my thoughts not the standard answers, stick with what you have been taught in the training if my thoughts conflict. A key point for the AM2 is to be competent and confident in what you are doing, to have this number of questions may be considered a...

There can be significant areas of risk in such an installation so be sure you are aware of all requirements before starting and take no risks either during the installation or using it after.  There will be key tests on the circuit to comply with the wiring regulations that will not have been...

It may be the same as this alarm, but do check it is programmed the same; mostly they are rebadged as is but sometimes there are minor changes.

My post was more of a technical exercise rather than practicality. However on a practical basis, as Tony has said, the volt drop is based on the design current with diversity taken into account and not the fuse size. The volt drop limits are 3.5% for lighting and 6.5% for power over that...

Result!

I would agree with that.  The voltage drop values are specified from the origin of the installation to the point of use. Therefore any sub main from origin to a DB that includes lighting in its final circuits is limited to a total volt drop (sub main plus final circuit) of 3%. I think in...

Have a look at the wiring in the main switch there should be a black and red core cable and the non pull cord end of the yellow, red and blue cored cable.  Note the terminals used for the yellow, red and blue cores at the main switch and match them in the pull cord switch.  e.g. yellow com, red...

The information you have given is not enough to be able to ensure that we can correctly advise a course of action. I might suggest that if you are not sure how this would be wired that you gain some on site advice from a  local electrician who could be sure of the wiring arrangement you have in...

I think the landis and gyr 5235D has an external time switch for two rates. On a quick google this place says they have them but they are often not actually the D variant, but might be worth asking them to ensure it is the one advertised.

The intended replacement lamp would be a 400 W 118 mm R7s linear halogen lamp, the fitting says 500W but this is the even less efficient version. Unless you really need that level of brightness then go for at most a 200W lamp or less but ensure it is 118mm not 78mm,  preferably use a 10W or so...

Murdoch GFCI is ground fault circuit interrupter (RCD). You have the breaker tripped on the bathroom lights, therefore there is a fault at the fan, shower light or vanity light. If there is no load out on the gfci then it is not doing anything, possibly you have missed the load out. Check the...

It is difficult to state if they are complaint with BS7671 as BS7671 only specifies that the products used should comply with an appropriate standard. It appears the boxes are made of ABS and meet various IEC standards so I would assume they are suitable for use under BS7671, but what types of...

I tend to put down "labelled as"... 60A or whatever is on the carrier, if anything. Then I assume they labelled it right regarding the rest of the bits I have to inspect but can do nothing about. If we are to code these how can we when BS7671 does not apply to them because the ESQCR takes...