[sdiy] OT: Mains Safety PSA

chris chris at chrismusic.de
Sat Jan 15 00:01:41 CET 2022

And we always thought electrolytic caps tolerance was the worst you
could find...


On Fri, 14 Jan 2022 23:09:11 +0100 cheater cheater via Synth-diy
<synth-diy at synth-diy.org> wrote:

> The breaker is rated 12A. I can get it to trip at 34A. I think that's
> all that needs to be said.
> On Fri, Jan 14, 2022 at 5:22 PM Chromatest J. Pantsmaker
> <chromatest at azburners.org> wrote:
> >
> > I'm in the US, and I've done extensive house wiring here, but I know nothing about what is acceptable or even legal in other countries.
> >
> > In the US, we run 120V for regular wall outlets.  The regular receptacles are rated at 15A.  The wiring needs to be rated for at least 15A, and the fuse/breaker can be rated no higher than the rating of the smallest wiring conductor between the breaker and outlets.  This is typically 14 gauge (with a 15A breaker) or 12 Gauge (with a 20A) breaker.  That breaker typically supplies *multiple* 15A receptacles, with the idea that they aren't going to all draw their rated maximum at the same time (if ever).  And if they do, the breaker trips or the fuse blows to protect the wiring.
> >
> > So my question is, do other countries allow wiring with oversized breakers?  Why didn't Cheater's fuse/breaker save the day?  I would expect breakers in 240V countries to be even smaller thanks to Mr. Ohm.
> >
> > On Fri, Jan 14, 2022 at 8:13 AM Mike Bryant <mbryant at futurehorizons.com> wrote:
> >>
> >> 26 Amps is also marginal for the house wiring in many European countries.    Europeans never did understand the advantages of UK ring mains which are of course compulsory here in most situations :-)
> >>
> >> -----Original Message-----
> >> From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of Gordonjcp
> >> Sent: 14 January 2022 13:55
> >> To: synth-diy at synth-diy.org
> >> Subject: Re: [sdiy] OT: Mains Safety PSA
> >>
> >> On Fri, Jan 14, 2022 at 12:33:06PM +0100, cheater cheater via Synth-diy wrote:
> >> > So as recent experience shows, 18 - 26 amps max continuous load for
> >> > months was a tad optimistic for this unknown brand Schuko wall socket,
> >>
> >> 18A is somewhat and 26A is grossly out of spec for Schuko.
> >>
> >> If you're going to pull that kind of power you need to look into getting a dedicated circuit and IEC60309 sockets fitted.  We use the 16A version for our "small" cabinets (where they mostly just power a single 24V rackmount PSU, with extra "UK plug" BS1363 sockets for plugging in test equipment.  For our server cabs we use the 32A version.
> >>
> >> You might want to use the 32A version, too.
> >>
> >> --
> >> Gordonjcp

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