Realising Obvious Things (that Blow Your Mind)

Dirk Diggler said:
That's why modern plug tops also have a black insulated portion at the base of the 2 live conductor pins. :)
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The insulation on the plug conductors is so you can't get a shock whilst inserting them. A child or someone with small fingers could wrap their hand around the plug when inserting it and be touching the base of the live conductors whilst the tips of them make contact inside the socket.
 
touch said:
The insulation on the plug conductors is so you can't get a shock whilst inserting them. A child or someone with small fingers could wrap their hand around the plug when inserting it and be touching the base of the live conductors whilst the tips of them make contact inside the socket.
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Absolutely, that's another reason for the insulation. It's designed that way because it can't meet IP20 standard whilst being inserted into the socket. However, it also prevents the issue you quoted. The openings on the phase and neutral entries already meet IP20 standard i.e. it's impossible to fit a finger in there so the shutters aren't there to prevent that.
 
builder22 said:
it’s a minor 7th and it would just be E in F# minor! Unless you mean harmonic minor...or melodic...
F# Major you’d use E#...but it’s because you only use one of each letter when spelling scales...

enough of this tho :p
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Raising the 7th in a minor key is a pretty normal thing to do (as you obviously know!) The point was that you’d never have an F natural in F# minor. You’re right that F# major would have been a far better example though.......

What I tell my students when they insist on spelling scales wrong is that E# and F aren’t the same note, they just happen to make the same noise....
 
Dirk Diggler said:
It wasn't always like that. The reason the design changed is because people had got into the habit of not bothering with a plug or multi gang extension and instead just stripped the brown and blue wires to bare copper and cut the earth off. They then sandwiched the brown and blue (in no particular order) into the socket with the plug of another device to create a makeshift extension. This meant that the plugless device had live bare copper exposed, no fuse, wrong polarity etc.

That's why modern plug tops also have a black insulated portion at the base of the 2 live conductor pins. :)
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I may have mentioned I was the Quality Audit Technician at Creda/Hotpoint/Ariston/Indesit for 27 years.
One day I was checking somebody's work and opened up the plug that would be fitted when it got to the customers house, the product wasn't tested with that plug and wire on.
I opened the plug to see the worst mess I have ever seen, with the wiring all over the place.
I quickly bonded 10 more and they were all totally different with the wires put anywhere.
I ran to the assembly line where every single plug was wired incorrectly and had to quarantine about a 1000 products.
The worker was one of my best mates and he said that he had never wired a plug before and nobody had showed him.
It was touch & go but I argued that he wasn't shown an example or trained to do it.
It does seem strange that a man of around 40 at the time and played in bands all his life had never wired a plug.
 
SexyGreyFox said:
The worker was one of my best mates and he said that he had never wired a plug before and nobody had showed him.
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Surely you ask someone if you don't know how to do it?! Not just randomly stuff the wires in anywhere. Must have had a terrible boss if he felt he couldn't ask for help :p
 
Reminds of me doing networking alongside CCTV crew. A lot of the crew felt the networking boys were overpaid and they could terminate CAT5... the sheer mess of the jobs they did that could have been avoided if they had asked for guidance.
 
touch said:
Surely you ask someone if you don't know how to do it?! Not just randomly stuff the wires in anywhere. Must have had a terrible boss if he felt he couldn't ask for help :p
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Think from his perspective, he didn't think he needed help.
"Wire those plugs up"
"OK"
 
Bluecube said:
Pretty sure that’s wrong. January is is named after Janus, a Roman god and has been around for a while. Not sure about February. The two “new” extra months are July and August after Julius Caesar and Augustus Caesar.
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Quintilis was renamed in honour of Julius after his death.
The 12 month calendar predates all of this, and the added months were January and February at the end of the year.

Ancient sources derived Februarius from februum, a thing used for ritual purification. Most of the observances in this month concerned the dead or closure, reflecting the month's original position at the end of the year.
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