1.1.1 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 machinesbookkeeping machinescalculatorscash registerscopying machinesdata circuit terminating equipmentdata preparation equipmentdata processing equipmentdata terminal equipmentdictation equipmentdocument shredding machinesduplicatorselectrically operated drawing machineserasersfacsimile equipmentkey telephone systemsmagnetic tape handlersmail processing machinesmicrographic office equipmentmodemsmonetary processing machines including automated teller (cash dispensing) machinesmotor-operated filesPABX'spaper jogging machinespaper trimmers (punchers, cutting machines, separators)pencil sharpenerspersonal computersphotoprinting equipmentplotterspoint of sale terminals including associated electronic scalespostage machinespublic information terminalsstaplerstelephone answering machinestelephone setstext processing equipmenttypewritersvisual 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 consideredsuitable 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 orfunctional characteristics of equipment.1.1.2 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 tropicalcountries, or at altitudes greater than 2 000 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.1.1.3 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.