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Operational characteristics of trailing cable splices.

Authors
Yenchek-MR; Schuster-KC; Hudson-AJ
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9540, 1995 Jan; :1-19
Link
NIOSHTIC No.
20039202
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
Splicing-tools; Thermal-analysis; Performance-tests; Splicing; Tapes; Adhesives; Tensile-strength; Mining-engineering; Wiring; Power-lines; Accelerated-life-tests; Splices
Publication Date
19950101
Document Type
Report of Investigations
Fiscal Year
1995
NTIS Accession No.
PB95-209227
NTIS Price
A03
Identifying No.
RI-9540
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9540
State
PA
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