UL 60950:2000 pdf download Safety of Information Technology Equipment
1 General
1.1 Scope
1.1.1 Equipment covered by this standard
This standard is applicable to mains-powered or battery-powered information technologyequipment,including electrical business equipment and associated equipment, with a RATEDVOLTAGE not exceeding 600 V and designed to be installed in accordance with the CanadianElectrical Code, Part l. CSA C22.1: CSA C22.2 No. 0: and the National Electrical Code. NFPA70
The standard is also applicable to equipment. unless otherwise identified by a marking olinstructions. desianed to be installed in accordance with Article 645 of the National ElectricaCode. NFPA 70. and the Standard for the Protection of Electronic Computer Data-ProcessingEquipmentNFPA 75.
See annex NAE for examples of and references to requlatory requirements that may apply tothis equipment.
This standard is also applicable to such information technology equipment designed andintended to be connected directly to a TELECOMMUNICATION NETWORk, regardless of the source ofpower.
it is also applicable to such information technology equipment designed to use the Ac MAINsSUPPLY 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 forthe OPERATOR and layman who may come into contact with the equipment and, where specificallystated,for SERVICE PERSONNEL.
This standard is intended to reduce such risks with respect to installed equipment, whether itconsists of a system of interconnected units or independent units, subject to installing, operatingand maintaining the equipment in the manner prescribed by the manufacturer.
Examples of equipment which is in the scope of this standard are:
1.1.2 Additional requirements
Requirements additional to those specified in this standard may be necessary for:
equipment intended for operation in special environments, for example, extremes oftemperature; excessive dust, moisture or vibration; flammable gases; and corrosive orexplosive 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 onsuch 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 Exclusions
This 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 andtransformers, which are not an integral part of the equipment;
– building installation wiring;
– devices requiring no electrical power.
1.2 Definitions
For the purpose of this lnternational Standard the following definitions apply. Where the terms’voltage and “current are used they imply the r.m.s. values, unless otherwise specified.