Shielding troughs allow for overhead routing of power cables/whips on top of the NetShelter enclosures and 4 post racks. The troughs attach without tools to the roof for ease of installation, and ship with ground studs and one 8 inch/203mm grounding strap. Includes: Installation guide, Qty 1 - 8 inch/20cm grounding strap Protective grounding provisions Safety protection against electric shock and reduction of EMI emissions. NetShelter Enclosures incorporate a series of ground studs within each enclosure, providing adequate means for grounding all loose sheet metal panels and/or internally rack-mounted equipment.