Messenger Wire

1 x 7, 1 x 19 from 1.0 to 4.19mm with BS183, BS4565, BS443, ASTM-475, ASTM363, ASTM640, ASTM498, BSI EN 50, 189 and IEC888 standards
Round wire concentric lay overhead electrical standard conductors IEC 1089
Galvanized-coating on wire BS 443
Zinc-coated steel, stay and messenger wire for aerial self-support, overhead earth or static wire
Galvanized steel strand stay wire and aerial earth wire for BS 183, ASTM IEC 888 1 x 7, 1 x 19, 1 x 37
As overhead ground (or static) wire (for protection against lighting)
1 x 7 construction strand with grade A galvanization and with group one tensile strength is mostly used for this application. The strand is installed at the top of steel tower and functions as a ground (earth) wire to protect the aluminum conductor with steel reinforced (ACSR) from lightening. Therefore, with its normal lifespan of 20 to 30 years, thick galvanized layer better than or equivalent to that of galvanized strand for ACSR is recommended
For telecommunication cable (self-supporting type)
Used to support self-supporting (SS) telecommunication cable, which has replaced obsolete lead plated cables. 1 x 7 strands with group one tensile strength and grade A galvanization are widely used for this application. The telecom cable and galvanized strands are coated together with a poly-ethylene insulation
As messenger wire to support utility lines
Used at train railroad, streetcar line and subway railroad. Either 1 x 7 or 1 x 19 construction strands are used
As guying wire (for poles and towers)
Used as guying wire for various poles and towers for power cables and telecom cables. The industry is moving towards using higher strength strands with better corrosion protection for this application
For ACSR (aluminum conductor, steel reinforced)