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Maybe not, but I've worked for it. Don't know about you.

Yes, I think we've thrashed this to death, sorry to bore some on here!

I don't know about "merely", but that's right ;) You can add (or subtract) components of 2 vectors, and same with real and imaginary parts of 2 complex numbers, so they're similar in that respect. But there's no such thing as vector dot and cross products with complex numbers. Also eg...

Imaginary numbers are a subset of complex numbers (as are real numbers). By convention, electrical engineers call them vectors, but complex numbers don't obey the rules of vector algebra, though there are similarities. If you need to work with complex numbers, Mathcad is excellent.

Definitely, I was of course joking. Complex number theory is a very interesting and useful branch of maths, with applications in several fields in science and engineering, AC theory for one. Are you aware of Euler's formula, e^(i*x) = cos(x)+i*sin(x)? Three apparently separate areas of maths...

OK thanks

Good summary Does the introduction of 3 (or more) phase motors affect the operation of RCDs? That's what I was unclear about.

I said that, did I?

You said something right for once. Slavery practised by other people.

Maybe, it could be a case of chicken and egg. And how is a copper meant to allow for that when dealing with a situation?

If numbers are imaginary, do they exist? ;)

This was discussed at some length here Fridge motor Looking at it again, I'm not clear where 3-phase, or more, at the motor or supply, in ericmark's #22, comes into the discussion, but no doubt you will enlighten me!

I believe fridge motors are 1-phase, capacitor start, (so brushless) but I haven't examined one for many years.

OK, with you. I can see that for a washing machine, which uses a wide range of motor speeds, and maybe a drier, but fridge/freezer? If it's not single speed, start/stop on thermostat I'd think it must be a recent development.

Do we know how he got the black eye?

Three phase domestic appliances? That surprises me

Does the cold feed go into the boiler flow pipe, after the open vent, or into the boiler return (the old way)?

This is pathetic. Anybody with half a brain knows they mean the same thing by either name.

You get sillier all the time.

So there is a road tax then?