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PPG
| Question | Answer |
|---|---|
| Bracket grounding | A method of personal protective grounding, in which a low resistance short circuited connection from a line to ground is provided on one or both sides of the worksite |
| Butt Ground | is a ground connection consisting of a temporary ground rod and grounding cable that is attached to the base of the tower |
| Cluster Bar | A cluster bar is a terminal point for the grounding jumpers used for equipotential zone grounding. |
| Disconnect Grounding clamp | A specially designed clamp that attaches to a disconnect cutout switches and provides a stud for the attachment of personal protective grounds |
| Equipotential zone grounding | short-circuited connection from line to ground is provided and connected to a cluster bracket attached to the pole. which provides a shunt that diverts the flow of current around the line worker. |
| Fault Current | the amount of current that a given system can deliver. Grounds must be rated for the available fault current. |
| Foreign Grounds | Grounded conductors that are within the equipotential zone. Grounded down guys and phone messenger are commonly encountered foreign grounds. Foreign Grounds must be bonded to the equipotential grounding scheme. |
| Ground Cable | OSHA requires that ground cables never be smaller than 2/0 AWG |
| Grounding spike clamp | Used to prove that an underground cable is deenergized at the work location |
| Grounding Elbow | Elbows are used for grounding applications in underground systems and provide a temporary ground. The grounding elbow is usually used in conjunction with a feedthrough bushing |
| Insulating Protective Cap | Used to cover vacated bushings on transformers and other underground apparatus. Insulating protective caps insulate, shield, and seal the vacated bushings |
| Portable Feedthru | Used for isolating, testing, and grounding underground circuits |
| Running Grounds | Used to effectively ground conductors that are being installed. Typically installed at one end of the pull section |
| Step potential | Refers to the voltage drop between a workers feet when the ground is energized by fault current. |
| Stringing Block Ground | Installed at various locations along the pull section |
| Test Probe | Devices that are inserted into underground bushings to a contact point for a voltage detector |
| Touch Potential | Touch Potential refers to a voltage drop between an energized metallic object that the employee is in contact with and the point on the earths surface where the employee is standing. |