Equipment covered by this standardThis standard is applicable to mains-powered or battery-powered information technology equipment@ including electrical business equipment and associated equipment@ with a RATED VOLTAGE not exceeding 600 V. This standard is also applicable to such information technology equipment designed and intended to be connected directly to a TELECOMMUNICATION NETWORK@ regardless of the source of power. It is also applicable to such information technology equipment designed to use the AC MAINS SUPPLY as a telecommunication transmission medium (see note 4 of clause 6). This standard specifies requirements intended to reduce risks of fire@ electric shock or injury for the OPERATOR and layman who may come into contact with the equipment and@ where specifically stated@ for SERVICE PERSONNEL. This standard is intended to reduce such risks with respect to installed equipment@ whether it consists of a system of interconnected units or independent units@ subject to installing@ operating and maintaining the equipment in the manner prescribed by the manufacturer.Examples of equipment which is in the scope of this standard are: accounting machines bookkeeping machines calculators cash registers copying machines data circuit terminating equipment data preparation equipment data processing equipment data terminal equipment dictation equipment document shredding machines duplicators electrically operated drawing machines erasers facsimile equipment key telephone systems magnetic tape handlers mail processing machines micrographic office equipment modems monetary processing machines including automated teller (cash dispensing) machinesmotor-operated files PABXapos;s paper jogging machines paper trimmers (punchers@ cutting machines@ separators)pencil sharpeners personal computers photoprinting equipment plotters point of sale terminals including associated electronic scales postage machines public information terminals staplers telephone answering machines telephone sets text processing equipment typewriters visual display unitsThis list is not intended to be comprehensive@ and equipment that is not listed is not necessarily excluded from the scope. Equipment complying with the relevant requirements in this standard is considered suitable for use with process control equipment@ automatic test equipment and similar systems requiring information processing facilities. However@ this standard does not include requirements for performance or functional characteristics of equipment.Additional requirementsRequirements additional to those specified in this standard may be necessary for:?- equipment intended for operation in special environments@ for example@ extremes of temperature; excessive dust@ moisture or vibration; flammable gases; and corrosive or explosive atmospheres;?- electromedical applications with physical connections to the patient;?- equipment intended to be used in vehicles@ on board ships or aircraft@ in tropical countries@?or at altitudes greater than 2 O00 m;?- equipment intended for use where ingress of water is possible; for guidance on such requirements and on relevant testing@ see annex T.NOTE - Attention is drawn to the fact that authorities of some countries impose additional requirements.ExclusionsThis standard does not apply to:?- support equipment@ such as air conditioning@ fire detection or fire extinguishing systems;?- power supply systems@ such as motor-generator sets@ battery backup systems and transformers@ which are not an integral part of the equipment;?- building installation wiring;?- devices requiring no electric power.