UL 310:2019 PDF Download

The UL 310:2019 standard specifies the requirements for quick-connect terminals used in electrical equipment. These terminals come in nominal widths of 2.8, 3.2, 4.8, 5.2, and 6.3 mm (0.110, 0.125, 0.187, 0.205, and 0.250 in). They are designed for internal wiring connections within electrical equipment and for connecting conductors to electrical equipment in accordance with the Canadian Electrical Code, C22.1, in Canada, and the National Electrical Code, NFPA 70, in the United States.

This standard applies to quick-connect terminals that are suitable for use with one or two 26 - 10 AWG (0.13 - 5.3 mm²) copper conductors. However, it does not cover terminals used with aluminum conductors. Additionally, the standard does not apply to multi-pole devices, as these are covered by UL 1977 and CSA C22.2 No. 182.3.

It is worth noting that in Canada, general requirements related to this standard can be found in CAN/CSA-C22.2 No. 0.