OT: UPS buying suggestion

Erich Dollansky erich at alogt.com
Fri Oct 18 04:09:28 UTC 2013


On Thu, 17 Oct 2013 14:44:23 +0100
Frank Leonhardt <frank2 at fjl.co.uk> wrote:

> On 17/10/2013 14:10, Ralf Mardorf wrote:
> > On Thu, 2013-10-17 at 13:15 +0100, Frank Leonhardt wrote:
> >> On 17/10/2013 07:51, Ralf Mardorf wrote:
> >>> On Thu, 2013-10-17 at 14:29 +0800, Erich Dollansky wrote:
> Bemessungsdifferenzströme = residual current rating (i.e. trip
> current). 1A! No good to stop a human being zapped, but might prevent
> a fire in the circuit. It'd be completely illegal in England,
> including in the workplace (I THINK). Certainly no more than 30mA for
> shock protection (or 10mA for low-voltage application like 110V. I
> know it's possible to fit 300mA where only fire prevention is needed;
> I've never seen anything higher than that, but I'm not an electrician.

1A? No, the maximum I heard of is 30A. All devices with a rating of
more than 30mA are used mainly in an industrial enviroment. I am sure
that they are legal also in England for that purpose.


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