2way light problem

[bernardgreen]

 

[EFLImpudence]

That's unlikey - even with the OP's singles.

 

[EFLImpudence]

Oh, and of course - impossible with your original diagram with twin&E and 3core&E meeting.

 

[ericmark]

I would say the back boxes for switches are tight enough as they are without having a block connector inside, OK no real option with intermediate switch, but two way switches are normally wired as EFLImpudence showed in first diagram.

Technically I suppose one should run the neutral with the live so it is a balanced transmission line, however at 50 Hz a small resistor or capacitor in the bulb can sink any out of balance current and stop the lamp coming on dim or flashing.

Oddly at school I was shown JohnW2 diagram, however also at school shown how a fluorescent tube worked with a starter, but missed out the ballast completely, that it seems is the advanced wiring diagram as used with "A" level students. So don't reckon much as far as electrics taught at school.

 

[ban-all-sheds]

My secondary school was founded in the mid 16th century, and some of the masters, whilst they probably had not been there since the beginning, looked as if they could well have been there since before electricity was discovered.

 

[JohnW2]

Oddly at school I was shown JohnW2 diagram, however also at school shown how a fluorescent tube worked with a starter, but missed out the ballast completely, that it seems is the advanced wiring diagram as used with "A" level students. So don't reckon much as far as electrics taught at school.

Well, I can't forgive the overlooked ballast (which sounds like a recipe for a 'big bang'!), but they were probably correctly teaching 'common/standard practice' as far as 2-way switching was concerned. The house I lived in whilst at school had such an arrangement, as did the first house I bought (in 1978) and also my present house (which had been rewired in the early 80s). In fact, it was decades after I was at school that I even became aware of what is now usually called the 'conversion' arrangement of 2-way switching.

Kind Regards, John

 

[flameport]

also at school shown how a fluorescent tube worked with a starter, but missed out the ballast completely, that it seems is the advanced wiring diagram as used with "A" level students.

As education progresses from 4 year olds starting school to university level, the only difference is that the lies, mistruths and omissions are less frequent.

 

[Tezbedz]

My secondary school was founded in the mid 16th century, and some of the masters, whilst they probably had not been there since the beginning, looked as if they could well have been there since before electricity was discovered.

I went to a very similar school in Stratford upon Avon

 

[JohnW2]

I went to a very similar school in Stratford upon Avon

The headmaster of my (boys') Grammar School was Victorian not only by birth by very much by attitude as well. Amongst other things he referred to mixed-sex schools as "the work of the devil" and, when some brave teacher instituted the concept of 'Saturday Night Dances' at the school, did all he could (eventually unsuccessfully!) to resist the idea that females should be allowed to attend these events. Items of, for example, footwear he disapproved of would often be described as "...as worn by third-class Swedish tourists"!

Kind Regards, John

 

[SUNRAY]

Technically I suppose one should run the neutral with the live so it is a balanced transmission line, however at 50 Hz a small resistor or capacitor in the bulb can sink any out of balance current and stop the lamp coming on dim or flashing.

This isn't the most common problem with the 'old' method of singles in tube.

 

[SUNRAY]

This was the method of intermediate switching taught at my school, using 2 double pole 2 way switches and a single gang 2 way.

I showed my father what I'd copied of the blackboard, he scribbled through and amended it with instruction to show it to the teacher.

I have come across it once using ceramic switches with screw on brass covers mounted on wooden pattesses with woven silk wiring And I've also found it in a wiring publication from the early 20th century. I recall the sketch in the 'Stannos method of wiring showing' advert showing the comparison with the alternative.