Automatic Electrical Controls for Household and Similar Use; Part 2: Particular Requirements for Timers and Time Switches

UL 60730-2-7

1 Scope

This clause of Part 1 is replaced as follows:

1.1 In general, this standard applies to timers and time switches for household and similar use that may use electricity, gas, oil, solid fuel, solar thermal energy, etc. or a combination thereof, including heating, air conditioning and similar applications.Throughout this standard the word "timers" means timers and time switches, unless the type is specifically mentioned.Devices which only indicate time or passage of time are not included.This standard does not apply to multi-functional controls having an integrated timing function which is not capable of being tested as a separate timing device.This standard does not apply to time-delay switches (T.D.S.) within the scope of IEC 60669-2-3.This standard is also applicable to individual timers utilized as part of a control system or timers which are mechanically integral with multifunctional controls having non-electrical outputs.

1.1DV Deleted December 5, 2002

1.1.1 This standard applies to the inherent safety, to the operating values, operating sequences where such are associated with equipment protection, and to the testing of timers used in, on or in association with household and similar equipment.This standard is also applicable to timers for appliances within the scope of IEC 60335.Timers for equipment not intended for normal household use, but which nevertheless may be used by the public, such as equipment intended to be used by laymen in shops, in light industry and on farms, are within the scope of this standard.Throughout this standard the word "equipment" means "appliance and equipment".This standard does not apply to timers designed exclusively for industrial applications.

1.1.1DV Deleted December 5, 2002

1.1.2 This standard applies to manual controls when such are electrically and/or mechanically integral with timers.Manual switches not forming part of an automatic control shall comply with IEC 61058-1.

1.2 This standard applies to controls with a rated voltage not exceeding 660 V and a rated current not exceeding 63 A.

1.3 This standard does not take into account the response value of an automatic action of a control, if such a response value is dependent upon the method of mounting the control in the equipment. If a response value is of significant purpose for the safety of the user or surroundings, the value defined in the appropriate household equipment standard or as determined by the manufacturer shall apply.

1.4 This standard applies also to timers incorporating electronic devices, requirements for which are contained in annex h.

1.5 Normative references

This subclause of part 1 applies except as follows:Add the following IEC standard.

1.5

IEC 669-2-3: 1984, Switches for household and similar fixed electrical installations - Part 2: Particular requirements for time-delay switches (T.D.S.).

1.5 Addition of the following to the part 2:

In IEC terminology, "safety" is defined as an acceptable level of risk. This is consistent with the intention of UL requirements to reduce the risk of fire, shock or injury to persons.