UL 60950

Safety of Information Technology Equipment

UL 60950

1.1 Scope

1.1.1 Equipment covered by this standard

This 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 and designed to be installed in accordance with the Canadian Electrical Code, Part I, CSA C22.1 ; CSA C22.2 No. 0; and the National Electrical Code, NFPA 70 .

The standard is also applicable to equipment, unless otherwise identified by a marking or instructions, designed to be installed in accordance with Article 645 of the National Electrical Code, NFPA 70, and the Standard for the Protection of Electronic Computer Data-Processing Equipment, NFPA 75.

See annex nae for examples of and references to regulatory requirements that may apply to this equipment.

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

motor operated files

bookkeeping machines

PABX’s

calculators

paper jogging machines

cash registers

paper trimmers (punchers cutting machines,separators)

copying machines

pencil sharpeners

data circuit terminating equipment

personal computers

data preparation equipment

photoprinting equipment

data processing equipment

plotters

data terminal equipment

point of sale terminals including associated electronic scales

dictation equipment

postage machines

document shredding machines

public information terminals

duplicators

staplers

electrically operated drawing machines

telephone answering machines

erasers

telephone sets

facsimile equipment

text processing equipment

key telephone systems

typewriters

magnetic tape handlers

visual display units

mail processing machines

micrographic office equipment

modems

monetary processing machines including automated teller (cash dispensing) machines

This 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.

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 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 2 000 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 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 and transformers, which are not an integral part of the equipment;

– building installation wiring;

– devices requiring no electrical power.