Re: Cable debate ...


"Keith G" <keith_g@xxxxxxxxxxxxx> wrote in message
news:Y6KdnbmZ3J3eLVjeRVnyig@xxxxxxxxxxxx
>
> "Roderick Stewart" <rjfs@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
> news:VA.00000e02.00646654@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>> In article <4de784d091jcgl@xxxxxxxxxxxxxxxxxx>, Jim Lesurf wrote:
>>> Just before Christmas a colleague brought me the electronics from his TT
>>> as
>>> it had stopped working. (Well regarded UK brand.)
>>>
>>> Examining it, and working out the circuit, worried me.
>>>
>>> There was no mains transformer, and no mains switch. The circuit was
>>> therefore live all the time the deck was plugged into the mains,
>>> regardless
>>> of the switches and indicators visible/useable on the deck.
>>
>> There's a lot of dodgy design nowadays, the commonest manifestation being
>> the
>> "lumpy mains plug" type of power supply with no switch, connected to the
>> equipment via one of those horrible little co-axial connectors with no
>> standardisation of physical size, voltage or polarity - if it even has a
>> polarity, because some of them are AC and some of them are DC. The only
>> power
>> switch is in the low-voltage circuit, and being fitted to the equipment
>> itself
>> probably gives the unsuspecting owner the comfortable feeling that when
>> it's
>> switched off it's switched off.
>>
>> Separate power supplies are so common nowadays, and almost unheard of
>> when I
>> was young, that I wonder what can have changed? In reality, two boxes are
>> more
>> expensive than one, considerably more ungainly, and with the huge variety
>> of
>> power requirements a splendid opportunity for error, so there seems no
>> practical sense in not building the power supply into the equipment. My
>> best
>> guess is that perhaps it is the result of some committee's misguided
>> notion of
>> a safety feature, but does anybody know why?
>
>
> Yes, there's wacky legislation afoot that any device with a captive power
> lead must be capable of being suspended by that lead, hence the advent of
> kettle leads.


Hmm. is this something very new, coming up in the UK?
Over here (and I would have thought that standard EU
regs apply everywhere) no equipment may have a
fixed three core power cable.
>
Iain



.

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