A NEW SPECIFICATION will present an economical method of manufacturing
single input stranded copper conductors used to deliver high-voltage
electrical power to industrial and residential sites.
ASTM B 902, Standard Specification for Compressed Round Stranded
Copper Conductors, Hard, Medium-Hard, or Soft Using Single Input
Wire Construction, will apply to conductors that will be insulated
for electric power delivery systems.
It facilitates the manufacture of a stranded conductor that would
have less process variability and reduced cost, says engineer
Steven Campbell, a high voltage technical development manager
for Forte Power Systems, Inc., Heflin, Ala. Campbell is chairman
of ASTM Subcommittee B01.04 on Conductors of Copper and Copper
Alloys within Committee B01 on Electrical Conductors. He says
only in the last 15 years has technology evolved that allows more
economical manufacture of these products.
An B01.04 subcommittee task group of manufacturers and users produced
B 902. It covers stranded conductors made from round copper wires,
either uncoated or coated with tin, lead, or lead alloy for general
use in insulated conductor assemblies for electrical purposes.
Examples are THW, THHN, 600-volt UD cables, medium-voltage URD
cables, and MV-90 power cables. It describes requirements for
wires, joints, measurement, construction, as well as physical
and electrical tests, and inspection.
The specification will be available August 1. For further technical
information, contact Steven Campbell, Forte Power Systems, Inc., 6771 Hwy. 78, P.O. Box 518, Heflin,
AL 36264. Committee B01 meets Oct. 26-27 in Orlando, Fla. For
meeting or membership details, contact manager Felicia Quinzi, ASTM (610/ 832-9738). //