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Correct abbreviations for electrical units.

One thousand watts is it 1Kw or is it 1KW both are used.

Is a "board of trade unit" 1Kwh or is it one 1KWH.


Likewise 1Mw or 1 MW

And 1Mwh or 1MWH.


And spelling.

Power inverter or power invertor or is either correct.
Parents
  • OED makes a subtle distinction between inverter = an apparatus which converts DC into AC; and invertor = an instrument for reversing an electrical current, a commutator.


    Thus the spelling in any standard will reflect the purpose of the apparatus concerned.
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  • OED makes a subtle distinction between inverter = an apparatus which converts DC into AC; and invertor = an instrument for reversing an electrical current, a commutator.


    Thus the spelling in any standard will reflect the purpose of the apparatus concerned.
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