a poser for trainees/ apprentices

[telectrix]

OK, just a little lighting fault for the learners among us to ponder on.

standard 2 way switching, 1 light. 3 core from sw1 to sw2, and switch wire from light in L1 and L2 of sw1.

job was to fit intermediate switch for customer's convenience.

removed 3 core from sw1 and diverted to intermediate switch, then new length of 3 core to sw2.

powered up and light on permanently, slight flicker when operating any one of the switches.

clue: the fault was of my own making, took 10mins to find, and would not have happened before 2006.

let the young 'uns have a crack before the experts try.

 

[Strima]

Headtorch...

 

[ackbarthestar]

Well, the European directive appears to have been all browns or blacks for the phases, I think it was the UK who argued that we should have some form of colour identification since blue was common to neutral throughout the EC. which we agreed to change, eventually, back in 71.

So it appears we are luck to have any colour discrimination at all. ! and we should consider ourselves lucky that we don't live on some of the Caribbean islands where you install the colour that is in stock on the day. lol

 

[telectrix]

was common practice on 2 way, to put red to red, blue to black ( sleeved) and use yellow for common. some guys, however used red as common, so it was in C. as you say, as long as it's sleeved.

edit: why should we follow mainland europe anyway? next thing is they'll be insisting we drive on the wrong side of the road.

 

[MarkieSparkie]

Headtorch...

Yes please! If your offering freebies.:lol:

 

[Knobhead]

For the few domestics I did red was always common. I suppose it’s each to his own.

 

[Strima]

Yes please! If your offering freebies.:lol:

Always free in exchange for some paper with the Queens head on... :lol:

 

[VoltzElectrical]

Wow... I think it is a unusual experience.

Not really. Probably quite 'common'. lol