UL 6703-2021 pdf download

UL 6703-2021 pdf download.Connectors for Use in Photovoltaic Systems.
2.2 Units of measurement 2.2.1 The requirements in this standard are stated in metric units that make the requirement conveniently useable in countries employing the various metric systems (practical SI and customary). In addition to being stated in metric units, the inch/pound units, that are customary in the USA, are also provided. The values given in SI (metric) units shall be normative, except for AWG conductor sizes. Any other values given are for information purposes only. 2.2.2 Equivalent – although, not necessarily exactly identical – results are to be expected from applying a requirement in USA or metric terms. Equipment calibrated in metric units is to be used when a requirement is applied in metric terms. 2.3 Undated references 2.3.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 3 Glossary 3.1 For the purpose of this standard, the following terms and definitions apply. In addition, see the Glossary section of the Standard for Cable Assemblies and Fittings for Industrial Control and Signal Distribution, UL 2238, for multi-polarity devices. 3.2 ACCESSIBLE PART – a part so located that it can be contacted by a person, either directly or by means of a probe or a tool, or that is not recessed the required distance behind an opening. 3.3 AMBIENT TEMPERATURE – maximum temperature of the ambient as assigned by the manufacturer, in which the connector is able to operate permanently without the maximum operating temperature being exceeded.
4 General 4.1 Only materials that are acceptable for the particular use shall be employed in a PV connector. PV connectors shall be made and finished with the degree of uniformity and grade of workmanship that are practicable in a well-equipped factory. 4.2 A PV connector shall comply with the requirements in the Standard for Wire Connectors, UL 486A- 486B, as appropriate, and with this standard. 4.3 Multi-pole PV connectors shall additionally comply with the following construction requirements, as appropriate, in the Standard for Cable Assemblies and Fittings for Industrial Control and Signal Distribution, UL 2238: a) Grounding and Dead-Metal Parts (Section 9); b) Terminals (Section 10); c) Strain Relief and Cord Entries (Section 11); and d) Assembly (Section 13). 4.4 There shall be no sharp edges or corners on the outer surface of a PV connector that can result in damage to the PV wire insulation that the connector contacts. 4.5 Latching connectors shall not require the use of a tool to unlatch. Latching connectors shall incorporate a suitable latching mechanism such as ribs, twisting action, or other latching mechanisms between the mated pair. 4.6 Locking connectors shall require the use of a tool to unlock the connectors in a mated position. A tool can be a specialized device provided by the manufacturer or a standard common device, i.e. screwdriver. The tool and its operation shall be identified in the manufacturer’s assembly instructions, see 12.2.1(d)(8).
6 Polymeric Materials 6.1 General 6.1.1 Polymeric materials may be used as an enclosure or as insulating materials that are in direct contact with or in close proximity, less than 0.8 mm (1/32 in), to live parts. When the same material is used for both purposes, the more stringent requirements shall be applied. 6.1.2 Polymeric materials employed as a part of the connector shall be suitable for its rated temperature. The relative thermal index (RTI), electrical, mechanical impact (IMP) and mechanical strength (STR), as determined in accordance with the Standard for Polymeric Materials – Long Term Property Evaluations, UL 746B, shall not be less than 20° C (36° F) above the maximum operating temperature rating for the connector as specified by the manufacturer. For soft materials, such as elastomers, where the RTI Mechanical IMP cannot be determined, or for those connectors protected from impact under use, the RTI mechanical IMP is not required. UL 6703-2021 pdf download.