UL 60730-2-18
Standard for Automatic Electrical Controls for Household and Similar Use; Part 2: Particular Requirements for Automatic Electrical Water and Air Flow Sensing Controls Including Mechanical Requirements

Edition Number:1SCC Approved:--
Edition Date:2004-01-16DOD Approved: --
Price Code:DANSI Approved: --


    1 Scope and normative references

    This clause of part 1 is replaced as follows:


    1.1 This part of International Standard IEC 730 applies to automatic electrical water and air flow sensing controls for use in, on or in association with equipment for household and similar use including controls for heating, air-conditioning and similar applications. The equipment may use electricity, gas, oil, solid fuel, solar thermal energy etc., or a combination thereof.

    Examples are pressurized boilers, air conditioning chillers and ventilation applications.

    1.1.1 This part 2 applies to the inherent safety, to the operating values, operating times, and operating sequences where such are associated with equipment protection, and to the testing of automatic electrical water and air flow sensing controls used in, on or in association with household and similar equipment.

    This part 2 is also applicable to controls for appliances within the scope of IEC 335-1.

    Automatic electrical water and air flow sensing controls 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 part 2.

    This part 2 is also applicable to individual controls utilized as part of a control system or controls which are mechanically integral with multifunctional controls having non-electrical outputs.

    This part 2 is not applicable to pressure sensing controls, requirements for which are contained in IEC 730-2-6.

    This part 2 does not apply to automatic electrical water and air flow sensing controls designed exclusively for industrial applications.

    Throughout this part 2, the word "equipment" means "appliance and equipment".

    1.1.1DV Modification to clarify 1.1.1 of 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, electric shock or injury to persons.

    1.1.2 This part 2 applies to automatic electrical controls, mechanically or electrically operated, responsive to or controlling an air or water flow.

    1.1.3 This part 2 contains requirements for electrical features of water and air flow sensing controls and requirements for mechanical features that may affect their electrical safety.

    1.1.4 In general, these water and air flow sensing controls are integrated or incorporated with the equipment or are intended to be integrated or incorporated in or on the equipment. This part 2 also covers these controls when they are independently mounted. In-line cord controls are not covered by this part 2.

    1.2 This part 2 applies to controls with a rated voltage not exceeding 660 V and a rated current not exceeding 63 A.

    1.2DV Modification of 1.2:

    The maximum voltage is 600 V. The maximum current is unlimited.

    1.3 This part 2 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 part 2 applies also to controls incorporating electronic devices, requirements for which are contained in annex h.

    1.5 Normative references

    This clause of part 1 is applicable, except as follows:



    IEC 730-2-6, 1991,  Automatic electrical controls for household and similar use – Part 2: Particular requirements for automatic electrical pressure sensing controls including mechanical requirements

    1.5DV Modification of 1.5 by adding the following:

    The following are US National References:


    Creepage Distance for Electric Equipment, Insulation Coordination Including Clearances and – UL 840

    Fittings for Conduit and Outlet Boxes – UL 514C

    Fuseholders – UL 512

    Fuses for Supplementary Overcurrent Protection – UL 198G

    Grounding and Bonding Equipment – UL 467

    Marking and Labeling Systems – UL 969

    Metallic Outlet Boxes – UL 514A

    Nonmetallic Outlet Boxes, Flush-Device Boxes, and Covers – UL 514C

    Plastic Materials for Parts in Devices and Appliances, Tests for Flammability of – UL 94

    Polymeric Materials – Fabricated Parts – UL 746D

    Polymeric Materials – Long Term Property Evaluation – UL 746B

    Polymeric Materials – Short Term Property Evaluation – UL 746A

    Polymeric Materials – Use in Electrical Equipment Evaluations – UL 746C

    Printed-Wiring Boards – UL 796

    Safety-Related Software – UL 1998

    Sleeving, Coated, Electrical – UL 1441

    Switches, Special-Use – UL 1054

    Systems of Insulating Materials – General – UL 1446

    Tape, Insulating – UL 510

    Terminal Blocks – UL 1059

    Terminals, Electrical Quick-Connect – UL 310

    Transformers, Class 2 and Class 3 – UL 1585

    Transformers, Specialty – UL 506

    Tubing, Extruded Insulating – UL 224

    Wire Connectors and Soldering Lugs for Use With Copper Conductors – UL 486A

    1.101DV Addition to the part 2:

    This part 2 standard is:

    a)    Intended to be used in conjunction with the third edition of the Standard for Automatic Electrical Controls for Household and Similar Use, Part 1: General Requirements, UL 60730-1A, and

    b)    Based on the first edition of IEC 60730-2-18.

    Expand All

    • Cover
    • Transmittal
    • Table of Contents
    • UL Preface
    • UL Foreword
    • Deviations
    • IEC Foreword
    • IEC Preface
      • AUTOMATIC ELECTRICAL CONTROLS FOR HOUSEHOLD AND SIMILAR USE – Part 2: Particular requirements for automatic electrical water and air flow sensing controls, including mechanical requirements
        • Section
          • 1 Scope and normative references
            • 1.5 Normative references
          • 2 Definitions
            • 2.2 Definitions of types of control according to purpose
          • 3 General requirements
          • 4 General notes on tests
            • 4.1 Conditions of test
          • 5 Rating
          • 6 Classification
            • 6.3 According to their purpose:
          • 7 Information
          • 8 Protection against electric shock
          • 9 Provision for protective earthing
          • 10 Terminals and terminations
            • 10.1 Terminals and terminations for external copper conductors
          • 11 Constructional requirements
            • 11.101 Constructional requirements relating to operating mechanism
          • 12 Moisture and dust resistance
          • 13 Electric strength and insulation resistance
          • 14 Heating
          • 15 Manufacturing deviation and drift
          • 16 Environmental stress
          • 17 Endurance
            • 17.1 General requirements
          • 18 Mechanical strength
            • 18.101 Strength of parts (hydrostatic)
          • 19 Threaded parts and connections
          • 20 Creepage distances, clearances and distances through insulation
          • 21 Resistance to heat, fire and tracking
          • 22 Resistance to corrosion
          • 23 Radio interference suppression
          • 24 Components
          • 25 Normal operation
          • 26 operation with mains borne perturbations, magnetic, and electromagnetic disturbances
          • 27 Abnormal operation
          • 28 Guidance on the use of electronic disconnection
        • Figures
        • Annexes
        • Annex E Circuit for measuring leakage current
        • Annex H (normative) Requirements for electronic controls
          • H.7 Information
          • H.11 Constructional requirements
            • H.11.12 Controls using software
          • H.26 operation with mains-borne perturbations, magnetic and electromagnetic disturbances
            • H.26.2 Addition:
            • H.26.4 Test of the influence of signal voltages in the power supply networks
            • H.26.5 Test of the influence of voltage dips and short voltage interruptions in the power supply network
            • H.26.7 Test of the influence of d.c. in a.c. networks
            • H.26.8 1,2/50 µs – 8/20 µs voltage-current surge test
            • H.26.9 Fast transient burst test
            • H.26.10 Ring wave test
            • H.26.11 Electrostatic discharge test
            • H.26.12 Radiated electromagnetic field test
            • H.26.13 Evaluation of compliance
          • H.27 Abnormal operation
        • Annex AA
          • AA.1 Number of cycles for independently mounted controls
    • Annex 18.DVA – Manufacturing and Production Tests(normative)