Two old MK dimmer switches from the 1970s. These have a separate switch and dimmer control, with both fixed and dimmed outputs.
Dimmer rated 500W, switches 5A. Switches are separate from the dimming part.
Internal components:
Variable resistor 4.5k to 490k
Fixed resistors 47k and 120k
Capacitors 2x 100nF, 1x 10nf
Q4006LT Diac/Triac
Ferrite core inductor.
Website: http://xo4.uk/?M77
...
https://www.youtube.com/watch?v=3mQ4ruL8igw
Why RCDs trip when faults between neutral and earth occur, and why switching off a circuit breaker / MCB is not isolating the circuit properly.
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https://www.youtube.com/watch?v=JTkuoMplER8
An old and obsolete voltage operated earth leakage circuit breaker.
These were used on TT installations in the 1970s and earlier to disconnect the supply if a fault occurred between live and an earthed metal part of the installation.
These devices are NOT RCDs, and do not provide any protection against electric shock.
The principle is that they are tripped by a voltage between the earth electrode for the installation and the earth connection to exposed conductive parts within the installation.
The wiring attached to this is tinned copper, and not aluminium. Aluminium wiring in small sizes was only in use for a very short period and was copper clad. 99% or more of wiring with a silver appearance is tinned copper.
00:00 Introduction
01:00 The Item
02:58 Inside
05:17 Trip coil
06:55 Buttons
08:45 Trip using DC voltage
11:49 Tinned copper wiring
14:54 TFW
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https://www.youtube.com/watch?v=1BHr3YvVfU8
An extension lead with 4 outlets and 4 USB sockets. A total failure straight out of the box. Inside - more fail.
Another video by Kyle Bishop on a pink version of this device: https://youtu.be/QZSAFKftsZM
Next episode with various test failures: https://youtu.be/yuZjxIEvP2A
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https://www.youtube.com/watch?v=wneFtZ755wE
Basics of multimeters, what they do and how to use them. This is from an electrical point of view - for electronics the features required will be different.
Includes the basics of voltage, current and resistance, how to measure those three things, manual and auto ranges, CAT ratings, a look inside two multimeters.
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https://www.youtube.com/watch?v=rrqa-R1zCWQ
BS7671 18th Amendment 2, published March 2022. This is a summary of the main concepts in the new Part 8, Prosumers Electrical Installations.
IET Fake Awareness with list of approved suppliers: https://electrical.theiet.org/bs-7671/fake-awareness/
Other videos in this series: https://www.youtube.com/playlist?list=PLVsHvs2SuqmqMoXZCFp_CYTgZH_Y2ywwk
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https://www.youtube.com/watch?v=1vGGbA8M9Uc
Driving an electric car or van, which is mostly the same as vehicles powered by other fuels.
Van used: Citroen e-Dispatch 50kWh.
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https://www.youtube.com/watch?v=LWXSjlSqZOw
Three Belkin standby saver plugs, two faulty and one working. Belkin model F7C009AF.
Product info: https://www.belkin.com/uk/support-article?articleNum=5398 (discontinued, not available to purchase)
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LPT200 power meter: https://youtu.be/2DQ9Jzulo4I
Triangular bits: https://amzn.to/2ApfeYh
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https://www.youtube.com/watch?v=9z0mxfpN0ig
A selection of older industrial style electrical switches and a 3 phase rewireable fuseboard.
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https://www.youtube.com/watch?v=qQ-JfTkheMs