Also known as cable protectors, cable ramps, and Yellow-Jackets, BumbleBees, Guard-Dogs, (all brand names). Placed wherever portable cable or wire must run on the ground in a traffic path. Most have five channels, which conveniently matches five-wire, 4/0 feeder. The jigsaw shapes allow multiple units to lock together end-to-end. Note: Different brands are very, very, rarely compatible with each other.
Picture from CABLERAMPS.COM: Cable Management Systems.
http://www.yjams.com/Yellow-Jacket-Classic/ps-1.aspx
Picture from CABLERAMPS.COM: Cable Management Systems.
http://www.yjams.com/Yellow-Jacket-Classic/ps-1.aspx