UL RP 5770:2018-08 Recommended Practice for Evaluating Cables for Use in Repeated Flexing Applications.
1.1 This Recommended Practice provides test procedures for evaluating the capability of a cable to withstand different flexing motions. One or more of these tests may be used depending on the specific application.
2 General
2.1 Units of measure
2.1.1 The unit of measure is defined as SI. If a value for measurement is followed by a value in other units in parentheses, the second value represents a direct conversion or an alternative value.
2.2 NormatIve references
Standard for Appliance Wiring Material, UL 758
Standard for Wire and Cable Test Methods, UL 2556
2.3 Safety
2.3.1 General It is not the intent of this recommended practice to address all of the safety issues associated with its use. It is the responsibility of the user of the recommended practice to train personnel, establish proper health and safety procedures and be aware of, and comply with, local, state/provincial, and national regulatory restrictions that apply.
2.3.2 Electrical hazards Certain test procedures require high voltage. Ills important that the equipment be designed to comply with good engineering practices, with safety being an integral part of the design. To avoid electric shock in such cases, necessary precautions shall be taken and test equipment manufacturers’ recommendations shall be followed.
2.3.3 Mechanical hazards Some tests utilizing mechanical equipment can expose the operator to mechanical hazards. Care shall be exercised to protect eyes, fingers, hands, and other body parts from injury.
2.4 Definitions
2.4.1 NORMAL VISION — vision without any aid other than the examiner’s normal corrective lenses, if any.
2.4.2 ROOM TEMPERATURE — 25 ±10 °C (77 ±18 °F).
2.5 Test temperature
2.5.1 Tests should be conducted at ROOM TEMPERATURE.
2.6 Tolerances
2.6.1 If tolerances are not provided, the values in Table 2.1 should be used.UL RP 5770 pdf download.