“100 FEET 1/2 BRAIDED GROUND STRAP GROUNDING TINNED COPPER USA location c-2 The 100 feet 1/2 braided grounding strap by Powell is a high-quality wire made of tinned copper tubular braid. The 100 feet 1/2 braided grounding strap by Powell is a high-quality wire made of tinned copper tubular braid.