Can we also go back to red & black wires please...

[Dustydazzler]

Brexit: Government to launch study on economic benefits of reintroducing imperial units

<strong>Exclusive: </strong>Business minister mocked for ‘ludicrous’ attempt to quantify ‘Brexit benefit’

uk.yahoo.com

 

[telectrix]

Just imagine them singing 'I can see for kilometres and kilometres'.
It would be a disgrace.
That's why we still use miles...... not many know about 1760 yards, though.

also........

 

[nicebutdim]

also........

There's no way they'd walk 880,000 yards.

 

[Mike Johnson]

When I started work all dimensions on drawings where in imperial with the metric equivalent in Millimetre's in brackets underneath never used Centimetre's or come to think of it Meters.

 

[oracle]

It is there for idiots. Had a 4th year apprentice working with me recently and he was baffled by 3 phase. Had absolutley no idea why it was RYB and claimed never to have seen it before. Needless to say after seeing his work I'd be scared to think next year he'll probably be out working on his own for a company no doubt.

An apprentice? I've seen 5 day Part P jockeys trading the next week.

 

[pc1966]

When I started work all dimensions on drawings where in imperial with the metric equivalent in Millimetre's in brackets underneath never used Centimetre's or come to think of it Meters.

It is recommended to only use multiples of 1000 (so um, mm, m, km) and not cm as it becomes far more obvious in the "unit" is wrong if out by 1000 instead of 10.

I have had some stuff machined to 1/10 scale as a result of that sort of mix-up!

 

[telectrix]

When I started work all dimensions on drawings where in imperial with the metric equivalent in Millimetre's in brackets underneath never used Centimetre's or come to think of it Meters.

when i started meters were for putting shillings in. rememember my dad telling me to put my pocket money in the "safe" under the stairs

 

[MJPD29]

An apprentice? I've seen 5 day Part P jockeys trading the next week.

We don't have the 5 day wonders here as far as I am aware, but then I don't get involved in the domestic market. What amazed me was how confident and cocky he was even though after 4 years he didn't know cable colours, how to fit a occupancy sensor or what a contactor did. Incredible

 

[telectrix]

There's no way they'd walk 880,000 yards.

it's 1,760,000 yards. as they need to comeback to record the next album. maybe be they entitle it "letter from Ukraine".

 

[Julie.]

It is recommended to only use multiples of 1000 (so um, mm, m, km) and not cm as it becomes far more obvious in the "unit" is wrong if out by 1000 instead of 10.

I have had some stuff machined to 1/10 scale as a result of that sort of mix-up!

Yeah, the use of cm really annoys me, there are preferred multiples/units.

Most come from latin so...

Instead of 1/100th - (centeimus) -
centimetre

Perhaps we should start using 1/20th - (vicesimum) - vicesmetre, vicesohm, vicesvolt.

That piece of cable is only 10vm long, it has a voltage drop of just 1vV.

That's going to mess them up!

 

[telectrix]

Yeah, the use of cm really annoys me, there are preferred multiples/units.

Most come from latin so...

Instead of 1/100th - (centeimus) -
centimetre

Perhaps we should start using 1/20th - (vicesimum) - vicesmetre, vicesohm, vicesvolt.

That piece of cable is only 10vm long, it has a voltage drop of just 1vV.

let me get a 50cl 1 gill of scotch and i'll re-read that.

 

[pc1966]

Yeah, the use of cm really annoys me, there are preferred multiples/units.

The other oddity is the deciBel but we can quietly ignore that for now.

 

[Julie.]

let me get a 50cl 1 gill of scotch and i'll re-read that.

Now I understand why people want to move to imperial, a gill is 1/4 of a pint - so around 3x a current 35 - 50ml serving!

And perhaps, really telling tel, is 50cl is 1/2 litre - close on a pint.

So ...

 

[Julie.]

The other oddity is the deciBel but we can quietly ignore that for now.

Yeah odd, but as no one really understands it anyway one can't argue against it....

So when you say it's 10dB bigger that's 10x yes, so the signal is 10x larger?

No that would be 20dB

What, so the power for 10x is 20dB?

No that's 10dB

Err hang on I said that the signal is 10x larger and you said it was 20dB not 10dB

It is yes!

Arrrhhhh....

Now tell me about entropy and enthalpy...

 

[DPG]

Yeah odd, but as no one really understands it anyway one can't argue against it....

So when you say it's 10dB bigger that's 10x yes, so the signal is 10x larger?

No that would be 20dB

What, so the power for 10x is 20dB?

No that's 10dB

Err hang on I said that the signal is 10x larger and you said it was 20dB not 10dB

It is yes!

Arrrhhhh....

Now tell me about entropy and enthalpy...

The logarithmic dB is not that hard to understand once you grasp it. The thing that makes it slightly more confusing to people, I think, is the difference between voltage gain in dBs and power gain in dBs, and also the weighted dBA unit.

I think I'd need a refresher myself to be honest though!

 

[Mike Johnson]

The reasoning behind only using millimetres on construction drawings was it avoids confusion when a dirty finger imprints over the dimension and you loose the decimal point.