Re: Seeking cable management ideas....

bp@www.zefox.net wrote:

Chris Green <cl@isbd.net> wrote:

Grant Taylor <gtaylor@tnetconsulting.net> wrote:

On 6/14/24 09:27, bp@www.zefox.net wrote:

One approach that sort-of works is to plug two walwarts (one for the
Pi, one for the hub) into a single 3-outlet extension cord, then coil
the excess wire (both mains and 5-volt) around the cleat- like object
which results and hold it in place by a cable tie or split conduit.
I've done a couple like this and it's ugly but better than loose
wires. One can at least see where each Pi plugs in.

 
I would be careful -> avoid coiling low voltage with high voltage mains.
 My concern is that you would end up with something akin to a (poor)
transformer of sorts.  Wherein the high voltage mains would couple onto
the low voltage lines.  At a 1:1 ratio, you'd end up with the same high
voltage on the low voltage secondary side.
 
I don't know how many loops on a coil would be needed for this to be
noticeable.
 

Without an iron core of some sort I doubt if there's much risk.
However wiring regulations require that mains carrying cables should
be either 50mm away from low voltage ones or that there should be
'mechanical separation' between mains and low voltage wiring. (That's
the basics anyway).
 

 
I hadn't considered electrical codes 8-) I suspect that very few
computer setups in homes observe a 50 mm separation rule, at
least here in the US. Still a picky inspector might take issue.
 

I'm quoting UK codes of course.  I *think* mechanical separation would
be satisfied by an extra layer of sleeving over the actual wires
carrying the mains voltage.  It is now a requirement in the UK (and EU
I believe) that all mains leads are sheathed, you can't use the
'figure of eight' twin flex that used to be quite common.

--
Chris Green
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