1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL TECHNICAL GUIDANCE DOCUMENTSThis Document is prepared and published by UL.Product Category (CCN): IFDRStandard Number: UL 2108Standard Title: Standard for Low Voltage Lighting SystemsEdition D
2、ate: December 7, 2015Edition Number: 2Section / Paragraph Reference: 3.19Subject: Low voltage wet location luminaires for CanadaGUIDANCE:A luminaire that poses no risk of electric shock in accordance with UL 2108 clause 3.19 is permitted to bemarked suitable for wet locations and is exempt from the
3、requirements and tests as specified in CSAC22.2 No. 250.0 section 13.4 or CSA C22.2 No. 9.0 section 10.2. Compliance can be declared as NotApplicable based on the voltage level being below the threshold for risk of electric shock injury.RATIONALE FOR GUIDANCE:As noted in the Guide Information for ca
4、tegory IFDR7, UL offers certification for low voltage luminaires forCanada based on the requirements of CSA C22.2 No. 250.0 or, for cabinet and under-cabinet low voltageluminaires, per CSA C22.2 No. 9.0. Both of these standards address luminaires of input voltages up to600 V, with no particular allo
5、wances or relaxations for low voltage products.CSA C22.2 No. 250.0 section 13.4 requires luminaires intended and marked for wet locations to complywith certain supplemental construction and performance requirements. These supplemental requirementsare intended to protect against the increased risk of
6、 electric shock associated with the presence of water,which can undermine and render less effective the luminaires electrical insulation system. CSA C22.2 No.9.0 has similar requirements, in section 10.2.UL 2108 is written specifically for low voltage luminaires. Clause 3.19 identifies the voltage l
7、evels, forvarious electrical waveforms, below which there is no risk of electric shock injury. These voltagethresholds are based on human physiology and long-accepted research findings. Luminaires that operateat or below the applicable voltage levels should be exempt from the supplemental wet locati
8、onrequirements specified in CSA C22.2 No. 250.0 and No. 9.0 because there is no reliance on theluminaires electrical insulation system to protect against the risk of electric shock - the human body aloneprovides for the necessary safeguard. Clause 51.3 of UL 2108 allows luminaires that operate withi
9、n thevoltage limits of 3.19 to be marked suitable for wet locations.The wet location luminaire requirements of CSA C22.2 No. 250.0 sections 13.4 and CSA C22.2 No. 9.0section 10.2 are intended to verify that a luminaires electrical insulation system design is able to withstandthe impacts of water and
10、 protect against the risk of electric shock. Luminaires that operate at voltageswhere there is no risk of electric shock do not rely upon these luminaire design features and therefore areexempt from these requirements.Copyright 2016 Underwriters Laboratories Inc.ULs Technical Guidance Documents are
11、intended to be used as reference documentation and aredesigned to provide assistance in understanding the application of requirements contained in thecorresponding UL Standard, provide assistance in addressing the use and applications of the respectiveproducts covered by the associated UL Standard(s), or both.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULThese guidelines do not contain any construction or performance requirements.STANDARD NUMBER: UL 2108 -2-
