I suppose there might be a little.
Depends on the lights whether it's noticed, I suppose.
Two 2way light circuits.
- Thread starter TonyW2
- Start date
Depends on the lights whether it's noticed, I suppose.
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Afterthought - Don't we get induced voltage from three strapper wiring?
Thanks for all the input.
Just to confound things, when I started to check the existing stuff, it turns out that one of the lights is looped at its lamp batton but the other has a connector block in its switch.
I think i will start from scratch, although as an adopted Yorkshireman it grieves me to spend even a couple of quid without my arm being near broken.
Just to confound things, when I started to check the existing stuff, it turns out that one of the lights is looped at its lamp batton but the other has a connector block in its switch.
I think i will start from scratch, although as an adopted Yorkshireman it grieves me to spend even a couple of quid without my arm being near broken.
Induced between what and what? As I recently illustrated, with the 'conversion method; of 2-way switch wring, at any one time there will be equal currents going along two of the three conductors 'in opposite directions (and nothing through the third), hence largely 'cancelling' in terms of electromagnetic coupling to anything else.
Capacitive coupling from live conductors may become an issue with any long switch cables, whether in the context of 1-way or 2-way switching.
Kind Regards, John
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I was just thinking of the LED flashing problem in two-way circuits.
Is it only in two strapper systems?
Is it only in two strapper systems?
Yes, I assumed that you were thinking of flashing LEDs (and sometimes even CFLs). However, as I just wrote, as I see it capacitative coupling between L and S/L (effectively bypassing the switch to a small extent) can occur with any sort of long switch runs - be they '3 strapper' or '2 strapper' 2-way switches or just plum standard 1-way switching.
I suspect that the common belief that this issue is peculiar to 2-way switching derives from the fact that,it is commonly associated with appreciably longer switch cable runs than is the case with 1-way switching.
Kind Regards, John
I thought that was what Rocky was referring to.
He appeared to be asking about the possibility of 'induced voltage' between two (separately switched) separate 'light sub-circuits' being a problem, rathing than a problem in relation to the switching of one of the lights.
Kind Regards, John
I'm confused.
Rocky wrote ....
... which seemed to be asking about a possible interaction between two lighting 'sub-circuits' (i.e. each having their own separate switch+light), regardless of how the switching was arranged (1-way, 2-way {'2-stapper' or '3-strapper}), and seemingly nothing to do with voltages induced 'between strappers' in one of the circuits. Have I misunderstand?
An arrangement which can theoretically give rise to what I thought Rocky was asking about is this ...
... particularly if the two S/L's are physically on the same side of the CPC in the 3C+E cable (and the cable is long).
Kind Regards, John
I don't know. I don't really understand what you are saying - or rather why you are saying it.
Rocky seemed to think there was a problem with the circuit Kentishman and I are proposing. Is there?
I'm saying it, because I'm also confused - firstly as to why Rocky was concerned about possible 'coupling' of the two (separate) light circuits and, secondly, why you responded by talking about coupling between strappers (of the same circuit). Rocky didn't actually quote anyone - are we sure to whose post/proposal he was responding?
I'm not sure what Rocky thinks, and why, but I see absolutely no problem with the circuit (which, to be fair, was essentially proposed by BAS before either Kentishman or yourself) - which, after all, is nothing more than two instances of plumb-standard 'traditional' 2-way light switch wiring.
Kind Regards, John
I don't think that's right. It's not quite plumb-standard.
I was not doubting the drawing, as John says it was in relation to the two switch lines in close proximity, though it would be a similar situation with singles in a pipe.
As its a large garage i was guessing a lot of inductive lights.
We work on large canopies that are wired in yy flex bunched in trunking and often find a reading of up to 50 volts at ends of disconnected cables, I assume from inductance, though its not a problem you still feel a tingle when connecting them in.
As its a large garage i was guessing a lot of inductive lights.
We work on large canopies that are wired in yy flex bunched in trunking and often find a reading of up to 50 volts at ends of disconnected cables, I assume from inductance, though its not a problem you still feel a tingle when connecting them in.
I wonder in what sense do you regard it as not being "two instances of plumb-standard 'traditional' 2-way light switch wiring"? You posted ...
With a bit of inexpert 'erasing', one can split that into the following two. This one ...
... and this one ....
In what sense are either of those latter two not "instances of plumb-standard 'traditional' 2-way light switch wiring"? If that's what each of them are, then the two together surely constitutes "two instances of plumb-standard 'traditional' 2-way light switch wiring", don't they?
Kind Regards, John
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