When installing a metal consumer unit, the line and neutral wires should pass through a single hole. If they are passed through separate holes, the resulting magnetic field can create eddy currents in the metal, causing overheating.
In this video, a current of 25A and 120A is passed through a single wire which is routed through two holes in a metal consumer unit to see if it overheats.
A selection of contactors, one with a failed contact. All have overheating damage to the plastic cases.
These have been in use for 15 years.
MEM types 4 pole AA404 and 2 pole AA402, normally open.
Hager types 2 pole ES220 normally open and ES230 normally closed.
Contactors and relays: https://youtu.be/5Iujs94re_U
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https://www.youtube.com/watch?v=9mC5h1s8a0A
Small screwdriver with three different sizes of fusewire concealed inside the handle.
Probably made 1950s-1960s.
The handle has 'Made In England' moulded in.
There is some other printed text, but all that remains is part of the word 'Presented', so presumably it was used as a promotional item.
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https://www.youtube.com/watch?v=qRB6cTyf4hg
Part 4 in the phase converter series. A look at the components which have been repainted, and the wiring diagram showing how the various parts were connected together.
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https://www.youtube.com/watch?v=18S2Vm8gNzg
A low cost mains powered LED nightlight is tested to see how much power is used when on or off, and the temperature of the resistors inside is measured.
Part 1: http://youtu.be/8hlqBIwLbuw
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https://www.youtube.com/watch?v=huPvdFKaJSM
An old broken socket outlet with the line and neutral holes totally open, and a new one which has other problems.
MK socket for comparison: https://youtu.be/H1gMYu5VHus
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https://www.youtube.com/watch?v=kPpX1YXvGcg
Wiring for a combination boiler with two central heating zones, each zone controlled by its own thermostat.
This is for 230V switched boilers only - NOT appropriate for boilers with 24V or other non-mains inputs.
Can be used with almost any thermostats, including Hive, Nest and other smart devices. Also applies to wireless, wired, mains powered and battery thermostats.
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https://www.youtube.com/watch?v=98lZvN9q7rw
Badgers and some other garden creatures. Recorded over a two week period in July 2013.
There is no sound, as the camera was inside behind a closed window - these are wild animals which run away at the slightest sound of anything.
Video contains a lot of noise, as the only lighting was a 10W LED floodlight.
This is a front garden in a rural area, the road is immediately behind the hedge. No traffic, as this was recorded between 11pm and 1am.
The rectangular tray on the ground is intended for birds, most of what is on it is seeds of various sorts. A few shots have bits of bacon fat, meat and various other things.
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https://www.youtube.com/watch?v=NwGLR2DzGWI
Destruction of an unsafe power lead, which also demonstrates the overheating that happens when an extension lead is used when rolled up.
Current approximately 13 amps.
While extended flat, it becomes hot to touch but does not fail.
When coiled, the same heat is concentrated into a smaller area which causes damage to the insulation and eventual failure.
Flames from 5:00
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