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Actual KW Rating of Electric Shower

ebee

Did anyone ever get an answer from manufacturers?

Example, not that long ago really, they used to quote the the KW rating for 240V Electric showers, from that you could calculate the expected heater impedance and current rating.

So far so good.

Then our nominal voltage changed to 230V to Harmonise with Europe etc.

But the manufacturers kept their stated rating.

Some then pointed out that at 230V a straightforward resistive element (non electronic) shower would actually run at less current and less voltage (if the voltage was actually 230 not 240) therefore less KW. 

So they started, I think to list both ratings, probably to keep trading standards happy .

So, the advertised shower KW nowadays, which rating do they give in the headline power advert?

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    I did eventually get a response to my email from a major manufacturer . Basically it looks like a printed spec probably given in one of their manuals. It gives the given KW at 240V and shows a comparison of a lower KW rating at 230V.

    personally, I have no objection to them stating a KW in a product in the UK market being as per our "real" voltage but I do understand the more pedantic taking the view that it must be stated at the harmonised voltage. Showing both and knowing what is what it also gives us a chance  of interpolating for any slightly differing actual voltages we may be working with in practice, to a degree at least.

    So, in this case, the stated KW on the box is if you have a (UK) 240V. Same as it was before we redeclared the value for the sake of harmony with Europe

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  • 0

    I did eventually get a response to my email from a major manufacturer . Basically it looks like a printed spec probably given in one of their manuals. It gives the given KW at 240V and shows a comparison of a lower KW rating at 230V.

    personally, I have no objection to them stating a KW in a product in the UK market being as per our "real" voltage but I do understand the more pedantic taking the view that it must be stated at the harmonised voltage. Showing both and knowing what is what it also gives us a chance  of interpolating for any slightly differing actual voltages we may be working with in practice, to a degree at least.

    So, in this case, the stated KW on the box is if you have a (UK) 240V. Same as it was before we redeclared the value for the sake of harmony with Europe

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