I live in an area where normality is to have the gutter inside the parapet wall as in your case. Some houses (but not my one) do have a (properly done) hole through the parapet wall for when the downpipe can't cope. I believe this takes some careful planning as it needs to be below the level...
AIUI when we have an inductive load the current sine wave lags behind (peaks after) the voltage sine wave, but in a capacitive load the current sine wave leads (peaks before) the voltage sine wave.
However most loads are inductive, any coil of wire is an inductor so transformers (e.g. taking...
Residual Current Device which you expect to find in your Consumer Unit (CU) (aka Fuse Box). The usual advice is to post a picture of the CU so that we can see all the "switches" and their labels.
One of the Pro's on here recommends bending the 2 shorter pins on the plug towards each other so that the plug can't be pushed into a socket. But, as Marty said, as long as it's unplugged it's safe.
Does the new switch have a metal faceplate? If so, you'll need to ensure that it's earthed.
I believe the most conscientious way of doing it is to connect the earth wire, which is currently in the back box, to the faceplate and then have a short flylead connecting the faceplate to the backbox...
I believe RandomGrinch is suggesting that, as a test, you connect the Live and the Timer terminals together, also connect (via the plug) the Live terminal to 240v and the neutral terminal to 0v and see if the fan works.
I wouldn't suggest having a link wire connected at 1 end to the Live...
I believe he means hold the "sharp" end of a screwdriver against the disc you want to remove and then tap (with a hammer) the handle end to knock the disc out.
Hopefully a correction to the above.
Your notes say both switches have 4 holes across the top and 5 across the bottom.
The photos of the new switches seem to show one as being upside down compared to the other.
I'm by no means certain but I believe the downstairs switch is more likely to have 5...
Your notes show both switches as having 4 holes across the top and 5 across the bottom.
I can't see the photos of the new switches very well but it looks to me as though the upstairs one has 4 holes across the top and 5 across the bottom.
As JohnD says you have to be very careful about...
I'm afraid you're not going to like this. There's a thread which has similarities to your question:
https://www.diynot.com/diy/threads/soakaway-question.635363
One of the replies in that thread says that it's really up to what your (and your neighbours) deeds say. In that thread the deeds...