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Operational Characteristics of Trailing Cable Splices.

PB95209227

Publication Date	1995
Personal Author	Yenchek, M. R.; Schuster, K. C.; Hudson, A. J.
Page Count	19
Abstract	The U.S. Bureau of Mines investigated the operational characteristics of spliced portable power cables. This research had a dual purpose: (1) to determine the thermal and mechanical performance of repaired trailing cables and compare them to undamaged cables, and (2) to gauge the impact of long-term, localized heating on the insulating and jacketing materials contained in the Mine Safety and Health Administration (MSHA) accepted or approved cable splice kits. The range of splice joint resistance and tensile breaking strength was first determined from laboratory measurements. The choice of crimping tools affected the strength of the splice under tension. Next, thermal profiles of energized spliced cables were constructed. Spliced conductor joints were found to operate 5 to 20 C hotter than the intact cable at rated currents. Finally, samples of splice kit insulation and jacket materials were subjected to accelerated life tests. Thermal aging of these materials confirmed a deficiency in the thermal rating of the insulating tape. The recommendations may be utilized to revise splice kit design, splice kit approval criteria, and trailing cable loading guidelines.
Keywords	Wiring Power lines Accelerated life tests Splices Splicing tools Thermal analysis Performance tests Splicing Tapes Adhesives Tensile strength Mining engineering Trailing cable splices
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 97E - Electric Power Transmission 71L - Materials Degradation & Fouling
Corporate Authors	Bureau of Mines, Pittsburgh, PA. Pittsburgh Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations/1995.
NTIS Issue Number	199514

Operational Characteristics of Trailing Cable Splices.

Operational Characteristics of Trailing Cable Splices.
PB95209227

Publication Date	1995
Personal Author	Yenchek, M. R.; Schuster, K. C.; Hudson, A. J.
Page Count	19
Abstract	The U.S. Bureau of Mines investigated the operational characteristics of spliced portable power cables. This research had a dual purpose: (1) to determine the thermal and mechanical performance of repaired trailing cables and compare them to undamaged cables, and (2) to gauge the impact of long-term, localized heating on the insulating and jacketing materials contained in the Mine Safety and Health Administration (MSHA) accepted or approved cable splice kits. The range of splice joint resistance and tensile breaking strength was first determined from laboratory measurements. The choice of crimping tools affected the strength of the splice under tension. Next, thermal profiles of energized spliced cables were constructed. Spliced conductor joints were found to operate 5 to 20 C hotter than the intact cable at rated currents. Finally, samples of splice kit insulation and jacket materials were subjected to accelerated life tests. Thermal aging of these materials confirmed a deficiency in the thermal rating of the insulating tape. The recommendations may be utilized to revise splice kit design, splice kit approval criteria, and trailing cable loading guidelines.
Keywords	Wiring Power lines Accelerated life tests Splices Splicing tools Thermal analysis Performance tests Splicing Tapes Adhesives Tensile strength Mining engineering Trailing cable splices
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 97E - Electric Power Transmission 71L - Materials Degradation & Fouling
Corporate Authors	Bureau of Mines, Pittsburgh, PA. Pittsburgh Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations/1995.
NTIS Issue Number	199514