These particular requirements apply to electrical vacuum cleaners (including their accessories and their component parts) for household and similar use. This standard applies as it is to electrical vacuum cleaners operating in dry conditions. Some addition and modifications for vacuum cleaners operating in wet conditions are under consideration. By "similar use" is understood use in conditions similar to those in households, for example in inns, coffee houses and tea rooms. This standard does not apply to vacuum cleaners for industrial or professional purposes.