Note that references are to IEC 60950 Third Edition 1999-04. Where the references in the Second Edition differ, they appear in parentheses.
Components in circuits at Hazardous Voltage are considered safety critical.
REQUIREMENTS
The product must be provided with one of the following means of connection to the primary power supply: - terminals for permanent connection to the supply - a non-detachable power supply cord for permanent
connection to the supply be means of a plug- an appliance inlet for connection of a detachable power supply cord- a mains plug that is part of direct plug in equipment
Power supply cord allowed by the standard are: - rubber insulated, of synthetic rubber and not lighter than
ordinary tough rubber sheathed flexible cord according to IEC 245. - polyvinyl chloride insulated; for equipment of mass 3 kg or less, no lighter than light polyvinyl chloride sheathed flexible
cord according to IEC 227; for equipment of mass more than 3 kg, no lighter than ordinary polyvinyl chloride sheathed flexible cord according to IEC 227. Table 11 of the standard specifies minimum
cross-sectional areas of conductors according to rated current. The standard requires that
non-detachable power supply cords are anchored in such a way that the point of connection are relieved of strain.Moveable equipment is considered by IEC 60950 to involve
a slightly increased risk of shock, due to extra strain on the supply cord in normal use, which may cause the disconnection of the earth conductor and a leakage current hazard.
MANUFACTURERSYou can get information on power supply cords from the following list of manufacturers. Feller
BeldenElectri-cordQualtekTumbler CorporationThe list of manufacturers is given as a service for your
convenience. It does not imply i-Spec's recommendation of any particular manufacturer or component. Manufacturers wishing to be added to this list are requested to contact us.
REFERENCE
Complete requirements are given in IEC 60950, Clause 3.2.5 (3.2.4)
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