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    UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR

    DISTRIBUTION WITHOUT PERMISSION FROM UL

    Subject 8750May 29, 2009

    SUMMARY OF TOPICS

    The following requirements for the Standard for Light Emitting Diode (LED) Equipment for Use inLighting Products, UL 8750, are being proposed:

    1. This proposed First Edition of the Standard for Light Emitting Diode (LED) Equipmentfor Use in Lighting Products, UL 8750, includes the following major changes from theOutline of Investigation, Subject 8750: a) Revised title to reflect intended range ofproducts covered by the standard; b) Revised Scope, Section 1, to reflect intended rangeof products covered by the standard; c) Added, removed, and revised glossarydefinitions; d) Removed General section and replaced with Power Supplies, LED Drivers,and Transformers; e) Added provision to Environmental Considerations for potted orconformal coated constructions; f) Revised Mechanical Construction to consolidatemechanical construction requirements into one section; g) Revised ElectricalConstruction to consolidate electrical construction requirements into one section; h)Revised Internal Wiring to expand considerations for wiring smaller than 18 AWG; i)Added requirements for both Permanently-Connected Units and Cord-Connected andDirect Plug-In Units; j) Added requirements for Coil Insulation for LED drivers employingcoil forms; k) Relocated Performance Tests and Abnormal Conditions Tests into onesection for Performance Tests; l) Relocated Markings section; m) Added supply wiringtemperature marking

    STP BALLOTS AND COMMENTS DUE: July 28, 2009

    1. This proposed First Edition of the Standard for Light Emitting Diode (LED) Equipment for Usein Lighting Products, UL 8750, includes the following major changes from the Outline ofInvestigation, Subject 8750: a) Revised title to reflect intended range of products covered by thestandard; b) Revised Scope, Section 1, to reflect intended range of products covered by thestandard; c) Added, removed, and revised glossary definitions; d) Removed General section andreplaced with Power Supplies, LED Drivers, and Transformers; e) Added provision toEnvironmental Considerations for potted or conformal coated constructions; f) RevisedMechanical Construction to consolidate mechanical construction requirements into one section;g) Revised Electrical Construction to consolidate electrical construction requirements into onesection; h) Revised Internal Wiring to expand considerations for wiring smaller than 18 AWG; i)Added requirements for both Permanently-Connected Units and Cord-Connected and DirectPlug-In Units; j) Added requirements for Coil Insulation for LED drivers employing coil forms; k)Relocated Performance Tests and Abnormal Conditions Tests into one section for Performance

    Tests; l) Relocated Markings section; m) Added supply wiring temperature marking

    RATIONALE

    Proposal submitted by: Ed Joseph, UL

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    UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR

    DISTRIBUTION WITHOUT PERMISSION FROM UL

    UL has determined that there is sufficient need and interest for developing a First Edition of theStandard for Light Emitting Diode (LED) Equipment for Use in Lighting Products, UL 8750. Theproposed standard is based on ULs currently published Third Issue of the Outline of Investigation forLight Emitting Diode (LED) Light Sources for Use in Lighting Products, Subject 8750.

    The Proposed First Edition of the Standard for Light Emitting Diode (LED) Equipment for Use in LightingProducts, UL 8750, includes the following changes from the previous published Third Issue of theOutline of Investigation for Light Emitting Diode (LED) Light Sources for Use in Lighting Products,Subject 8750. Aside from these noted changes, minor editorial changes and rearrangement ofthe requirements within the standard were made for ease of use.

    a) Revision to the title to reflect the intended range of products covered by the standard. In thetitle of the standard, the term Equipment replaces Light Sources.

    b) Revisions to the Scope, Section 1, to reflect the intended range of products covered by thestandard. The Scope was revised to specify component parts including LED drivers, controllers,arrays, modules, and packages.

    c) Changes to Definitions, Section 3, as follows:

    Removed: The following definitions were removed as these terms were not referencedin the standard:

    circuit, extra-low voltage

    circuit, limited current

    circuit, safety extra low voltage

    enclosure, mechanical

    lamp

    LED lamp, integrated

    LED lamp, non-integrated

    LED luminaire

    LED module

    Pollution Degrees (1, 2, and 3)

    power source, Class 2 or Limited Power Source (LPS)

    rated maximum temperature, Tc

    Added: The following definitions were added as these terms are referenced in thestandard:

    barrier

    LED control module

    MAY 29, 2009SUBJECT 8750 -2-

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    UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR

    DISTRIBUTION WITHOUT PERMISSION FROM UL

    insulation-piercing terminal

    environmental locations (dry, damp, wet)

    PLC value

    power source, Low Voltage Limited Energy (LVLE)

    Revised:

    The definition of LED array was revised to combine the definitions for LEDarray and LED module for the purpose of clarification of terms.

    Risk of fire was also revised in order to align with the definition of Class 2 andLVLE circuits.

    d) Removed General from previous Section 4 and replaced with new Power Supplies, LEDDrivers, and Transformers, Section 4, including the following changes:

    1) Requirement of previous paragraph 4.2 for double insulated products was removedas it was not anticipated that products covered by the standard would be designed inthis fashion.

    2) Generalized statement of previous paragraph 4.1 addressing the relationship ofrequirements in this standard to applicable end-use lighting standard was relocated intoparagraphs 6.1.1, 7.1.1, and 8.1.1.

    3) Added paragraphs 4.1 and 4.2 for power supplies, LED drivers, and transformers torelocate previous Sections 8.3 and 8.4 of the Third Issue of the Outline of Investigation.

    e) Added provision to Environmental Considerations, Section 5, for constructions that are pottedor conformal coated. Section 5 was revised to introduce an exception to the environmentalcondition tests for damp and wet location units that are potted or provided with a conformalcoating. These added provisions are consistent with the requirements in the Standard forFluorescent-Lamp Ballasts, UL 935.

    f) Revised Mechanical Construction, Section 6, to consolidate mechanical constructionrequirements of previous Sections, 6, 8, and 9 into one section of the standard, including thefollowing changes:

    1) Section 6 was revised to consolidate metal enclosure and polymeric enclosure andmaterial requirements for LED power sources, LED arrays, controllers, and packagesinto one location within the standard.

    2) Added an exception in Section 6.2 for reduced metal enclosure thickness based on amechanical strength test introduced in Section 8.13. This requirement is consistentwith the requirement for reduced metal thickness in the Standard for Luminaires, UL1598.

    3) Material flammability requirements and electrical properties requirements for LEDlens materials were added in Table 6.2 and paragraph 6.3.4 taking into considerationthe small size of this component part.

    MAY 29, 2009SUBJECT 8750 -3-

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    UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR

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    g) Revised Electrical Construction, Section 7, to consolidate electrical construction requirementsof previous Section 7, 8, and 9 into one section of the standard. This section now coverselectrical construction requirements for LED power sources, LED arrays, controllers andpackages.

    h) Revised Internal Wiring, Section 7.3, to expand considerations for wiring smaller than 18AWG. These requirements are consistent with the internal wiring requirements in the Standardfor Luminaires, UL 1598.

    i) Added Permanently-Connected Units, Section 7.4.2, and Cord-Connected and Direct Plug-InUnits, Section 7.4.3. Requirements were added for supply and load connection of permanentlyconnected, cord-connected, or direct plug in LED drivers. These requirements are consistentwith the supply connection requirements in the Standard for Electric Sign Components, UL 879.

    j) Added requirements for Coil Insulation, Section 7.11, for LED drivers employing coil forms.These requirements are consistent with the coil insulation requirements in the Standard forClass 2 Power Units, UL 1310.

    k) Relocated Performance Tests from previous Section 10, and Abnormal Conditions Tests,from previous Section 11, into Performance Te