IEC 60999-1:1999

Foreword
1 Scope
2 Normative references
3 Definitions
4 General
5 General notes on tests
6 Main characteristics
7 Connection of conductors
8 Constructional requirements
9 Tests
Annex A (informative) Approximate relationship between mm2
                      and AWG sizes
Annex B (normative) Rated connecting capacity and
                    corresponding gauges
Annex C (normative) Construction of stranded conductors
Bibliography
Figure 1 - Test apparatus according to 9.4
Figure 2 - Examples of pillar clamping units
Figure 3 - Examples of screw and stud clamping units
Figure 4 - Examples of saddle clamping units
Figure 5 - Examples of mantle clamping units
Figure 6 - Examples of screwless-type clamping units
Table 1 - Relationship between rated connecting capacity and
          diameter of conductors
Table 2 - Relationship between mass and cross-sectional area
          during testing
Table 3 - Relationship between pull force and cross-sectional
          area
Table 4 - Relationship between torque and nominal diameter of
          thread

IEC 60999-1:1999 Applies to screw-type and screwless-type clamping units for connecting devices, either as separate entities or as integral parts of equipment, for the connection of electrical copper conductors (complying with IEC 60228), rigid (solid or stranded) and/or flexible, having a cross-sectional area of 0.5 mm2 up to and including 35 mm2 and equivalent AWG sizes with a rated voltage not exceeding 1 000 V a.c. with a frequency up to and including 1 000 Hz, and 1 500 V d.c.