SUMMARY OF REQUIREMENTS
The following is a brief summary of the new and revised paragraphs in the Standard for Transfer Switch Equipment, UL 1008, which have a future Effective Date of April 15, 2013 and the action that may be required to determine compliance.
Paragraphs / General Subject and Comment /11.4 and 11.5 / Addition of requirements for location of switch handles – will require construction review /
17.1, 18.1-18.4, 18.11-18.13, 51.76-51.78, SB1.6, SB5.2-SB5.4, SB27.12 / Additional requirements regarding single pole separable connectors, including interlocking and marking requirements – will require review of construction, markings and test data, and possible retesting /
22.4-22.5, 30.5, 30.6, 30.8,51.18 / Intentional time delay is allowed, transfer must be possible in 10 seconds. Will require review of construction, marking, instructions, and possible operation/timing tests. /
28 / Hinged doors must open past 90 degrees. Construction review required /
39.1, 39.3, 39.4, 39.11-39.21, 39.26, 39.38-39.40 / Clarification of withstand test method(s) to determine short circuit ratings and appropriate overcurrent protective device – will require review of construction, markings and test data, possible retesting /
42.1-42.4, 42.6 / Clarification of closing test method(s) to determine short circuit ratings and appropriate overcurrent protective device – will require review of construction, markings and test data, possible retesting /
43.1-43.8, 43.10, 43.15, 43.19-43.22 / Clarification of short time withstand test, including new pass/fail criteria. Will require review of construction, markings and test data, possible retesting /
51.21-51.33, table 51.2, 51.67 / Significant changes to marking of short circuit and short time ratings – will require review of construction, markings and test data, to determine how markings need to be changed /
52 / Permanence of marking. Markings now required to be permanent. Review of required markings and marking methods will be necessary. /
SB6.6 – SB6.10
Section SB23
Section SB24 / Addition of requirements for spring-closing covers and covers closed by gravity will require review of construction, markings and test data, and possible retesting /
SB27.13 / All Danger and Warning signs shall comply with Z535-4. Will require review of markings. /
Appendix B / Informative Appendix gives examples of markings /
Paragraphs / General Subject and Comment /