LAPP North America's current product catalog

Appendix Technical data

Cable Frequently asked questions

1. What is U 0 /U? The nominal voltage in European applications is expressed by the combination of two values expressed by the designations U 0 /U, where: U 0

: The voltage between any insulated conductor and shield or ground. U: The voltage between any two conductors of a multi-conductor cable. Example : P/N 0026157: the nominal voltage is expressed as 300/500 V. U 0 : 300V, the voltage between any insulated conductor and shield ground. U: 500V, the voltage between any two conductors of a multi-conductor cable.

2. Are the voltage ratings in the catalog expressed in terms of Alternating Current (AC) or Direct Current (DC)? Voltages are expressed in Alternating Current. A conservative estimate of the amount of Direct Current voltage is 1.5 times the AC value. Example : P/N 0026157: based on the voltage listed above, the estimated DC voltage would be as follows: U 0 : 300 VAC × 1.5 = 450 VDC U: 500 VAC × 1.5 = 750 VDC 3. Do wire and cable require MSDS sheets? No. Any products that meets the definition of an “article” are exempt from the OSHA Communication Standard and do not require an MSDS. An article is a manufactured item: a) which is formed to a specific shape or design during manufacture; b) which has end-use functions dependent in whole or part upon its shape or design during end use; c) which does not release or otherwise result in exposure to a hazardous chemical under normal conditions of use. 4. What are the requirements for green/yellow stripe width of LAPP conductors? For every 15 mm length of conductor, one of those colors shall cover at least 30% and not more than 70% of the surface area of the conductor. The other color covers the remainder. 5. Why are there symmetrical grounds in a VFD cable? The three symmetrical bare ground wires provide a balanced ground system. This combination reduces AC motor shaft voltage, thereby reducing the likelihood of premature motor bearing or motor insulation failure. 6. Why are conductor diameters not specified for European stranding? VDE only specifies maximum DC resistance requirements; VDE does not specify a conductor tolerance to the number of strands or diameters. These can vary so that maximum DC resistance requirements are not exceeded.

7. My cable order has been shipped; can I get a test report? Relevant Test reports can only be provided when requested at the time of order.

8. Can a flexible cable be used in a continuous flexing application? No. Flexible cables are intended to move randomly in a non-automated application. They are susceptible to occasional uncontrolled conditions of movement.

9. Can a continuous flexing cable be used in a festoon trolley application? No. Continuous flexing cables are intended for constant linear motion in automated non-festoon applications.

10. Can a continuous flexing cable be used in a robotic application? No. Robotic applications requires x-y-z motion which will incur continuous bending and torsional (twisting) movements.

11. For wire and cable, can temperature and/or voltage ratings be exceeded? No. It is never recommended to exceed either temperature and/or voltage ratings due to the potential safety issues.

for current information see: www.lappusa.com • www.lappcanada.com

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