A ground clamp comprises an electrically-conductive main member with outwardly-projecting upper and lower flanges. One or more lugs or abutments (which may have pointed tips) project upward from the lower flange, and a bolt rotatably engages a threaded hole or nut on the upper flange, such that the lower end of the bolt stem is oriented toward the lower flange. The lower end of the bolt stem has a concave recess with a sharp-edged circumferential rim. When a conductive element of a structure or equipment unit requiring grounding is disposed between the lugs and the bolt stem, rotation of the bolt will clamp the conductive element between the lugs and the bolt stem, with the bolt stem's sharp-edged circumferential rim tending to rotatingly penetrate any surficial contaminants on conductive element, thus establishing or enhancing electrically-conductive contact with sound metal beneath the surficial contamination on the conductive element.

An access point for sending signals along a plurality of tracer wires includes a base and a cover attached to the base. The access point includes a plurality of terminals wherein each of the plurality of terminals include a bore for receiving one of the plurality of tracer wires within a cavity of the base and conductively connect to each of the plurality of tracer wires to each of the terminals. A switching mechanism is slidably positioned between the base and the cover wherein the switching mechanism includes a ground terminal configured to conductively connect to a ground wire. The switching mechanism is configured to slide between a first position where conductive contact is made between the switching mechanism and each of the plurality of terminals and a second, ground open position.

An access point for sending signals along a plurality of tracer wires includes a base and a cover attached to the base. The access point includes a plurality of terminals wherein each of the plurality of terminals include a bore for receiving one of the plurality of tracer wires within a cavity of the base and conductively connect to each of the plurality of tracer wires to each of the terminals. A switching mechanism is slidably positioned between the base and the cover wherein the switching mechanism includes a ground terminal configured to conductively connect to a ground wire. The switching mechanism is configured to slide between a first position where conductive contact is made between the switching mechanism and each of the plurality of terminals and a second, ground open position.