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Expansion Sections are used at all structural expansion joints and for systems longer than 492 ft. (150 m) to allow for thermal expansion / contraction of the bar. The maximum gap of the Expansion Section is 2.0" (50 mm). The Expansion Section is 14' 9" (4.5 m) long and is installed in place of one length of conductor bar.
Cu-Expansion-Sections-with-Splice-Installed
Unit of Measure
1 

Item #

Amperage Rating

Cover Type

Weight

Material

310307-J N/A 160 A N/A Standard Phase Cover (Orange) N/A 7.5 lb3.4 kg N/A Copper
310308-J N/A 160 A N/A Standard Ground Cover (Green) N/A 7.5 lb3.4 kg N/A Copper
310309-J N/A 160 A N/A Medium Heat Cover (Red) N/A 7.5 lb3.4 kg N/A Copper
39132-J N/A 160 A N/A UV Stable (Black) N/A 7.5 lb3.4 kg N/A Copper
310407-J N/A 250 A N/A Standard Phase Cover (Orange) N/A 8.9 lb4 kg N/A Copper
310408-J N/A 250 A N/A Standard Ground Cover (Green) N/A 8.9 lb4 kg N/A Copper
310409-J N/A 250 A N/A Medium Heat Cover (Red) N/A 8.9 lb4 kg N/A Copper
39133-J N/A 250 A N/A UV Stable (Black) N/A 8.9 lb4 kg N/A Copper
310507-J N/A 400 A N/A Standard Phase Cover (Orange) N/A 10.6 lb4.8 kg N/A Copper
310508-J N/A 400 A N/A Standard Ground Cover (Green) N/A 10.6 lb4.8 kg N/A Copper
310509-J N/A 400 A N/A Medium Heat Cover (Red) N/A 10.6 lb4.8 kg N/A Copper
39134-J N/A 400 A N/A UV Stable (Black) N/A 10.6 lb4.8 kg N/A Copper
Unit of Measure
1