Or perhaps even 7.2kW to be fair.I guess we can take that as 7.2kw (?)
Or perhaps even 7.2kW to be fair.I guess we can take that as 7.2kw (?)
They might. There will certainly be some 'margin', since no-one would serious believe that a switch 'rated' at 20A would 'blow up' at 20.01A. However, since it's not part of the spec, we can only guess at how far one can exceed the rating without potentially incurring problems.What was at the back of my mind was that if isolator switches, say a 20A, have say a 100% overload for the contacts for a certain time before problems arise.
As above, there obviously must be 'margins', but we can usually only guess what they might be.I know all contacts in isolators can take more than what is stamped on the back.
best installed 20amp dp switches can very often burn out on their intended uses,
Phatboy, are you sure? I have never seen a hob come with a 13A plug attached.
JL do not sell it any longer. Here it is:Absolutely, it's this one:- https://www.johnlewis.com/bosch-pia611b68b-induction-hob-black-glass/p562279
We are a family of 4, and the limitation of 13amp has never hindered even Christmas Day cooking!
JL do not sell it any longer. Here it is:
https://www.bosch-home.co.uk/product-list/PIA611B68B
I'm in the process or purchasing one.
It says 32A circuit required.
But also says it can be used on 10A and 16A circuits. (for europe I guess). I would love to know how you invoke this. There are links where the power is connected, so maybe you remove the links.
I would imagine when on half power, it time multiplexes the cooking zones.
I guess it won't allow you to set them all to max, and forces the user to choose lower settings?
If it were me, and I assume most users, I would switch off each ring before opening the switch, then breaking the max current does not arise. Don't know whether you can design on that basis though.As I've said (and as I would have thought would be obvious to anyone who understands the concepts), the concept of diversity is not appropriate to switches. Diversity estimates the maximum average current over an appreciable period of time, which is what matters in terms of heating of cables etc. A switch has to be able to safely break the maximum possible instantaneous current at the moment of switch-off - so the average current over a period of time is irrelevant, hence application of diversity inappropriate.
Kind Regards, John
Indeed - as you say, that's what you, I and most others would do if we could (although I doubt that many/most of us would in an 'emergency' situation - e.g. if smoke or flames were involved, or someone was receiving an electric shock!). In any event ...If it were me, and I assume most users, I would switch off each ring before opening the switch, then breaking the max current does not arise.
I think that's the point - even if that scenario is very unlikely, one should not design on the basis that it would never happen. Indeed, could your argument not be used in an attempt to 'justify' the use of a switch which could only safely break 10A, 5A or whatever?.... Don't know whether you can design on that basis though.
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