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Personal Protective Grounding for Electric Power Facilities and Power Lines


File : pdf, 1.66 MB, 89 pages

TOC

1. Purpose and Scope
1.1 Purpose
1.2 Scope
1.3 Responsibility
1.4 Cancellation

2. Definitions and Interpretations

3. Determine Need for Personal Protective Grounding
3.1 Uses Permitted
3.1.1 Over 600 Volts (Required)
3.1.2 Less Than 600 Volts (Optional)
3.2 Uses Not Permitted
3.2.1 Lightning
3.2.2 Over 50,000 Amperes Available Fault Current
3.2.3 Nontemporary Installations

4. Basic Criteria for Safe Grounding Practices
4.1 Electric Shock Hazard
4.2 Protective Grounding Requirements

5. Ground Cable Assemblies
5.1 Grounding Cable
5.1.1 Cable Ampacity
5.1.2 Parallel Grounds
5.2 Grounding Cable Jackets
5.3 Grounding Clamps
5.4 Ground Cable Ferrules

6. Application of Protective Ground Cables
6.1 Determine Maximum Available Fault Current at Worksite
6.2 Size the Cables
6.2.1 Cable Size
6.2.2 Cable Length
6.3 Inspect Ground Cable Assemblies
6.4 Obtain a Clearance
6.5 Confirm De-Energized Status (arc flash hazard analysis required)
6.5.1 Hot Stick
6.5.2 Noisy Tester
6.5.3 Hot Horn or Noisy Tester
6.5.4 Multiple Range Voltage Detector
6.5.5 Neon-Type Indicator
6.5.6 Direct-Reading Voltmeter
6.6 Clean Connections (arc flash hazard analysis required)
6.6.1 Wire Brushing
6.6.2 Self-Cleaning Clamps
6.7 Grounding Cable Installation
6.7.1 Ground-End Clamps
6.7.2 Circuit-End Clamps (arc flash hazard analysis required)
6.7.3 Multiphase, Worksite Grounding Required
6.7.4 Parallel Grounds
6.7.5 Barricade
6.7.6 Removal
6.8 Arc Flash Hazard Analysis Required

7. Power and Pumping Plant Protective Grounding
7.1 Three-Phase Tee Grounding
7.2 Double-Isolation Grounding

8. Switchyard and Substation Protective Grounding
8.1 General Considerations for Placement of Protective Grounds
8.2 Power Circuit Breakers and Transformers
8.3 Disconnect Switches and Bus
8.4 Insulated High-Voltage Cable
8.4.1 Cable Terminations
8.4.2 Midsection and Splices
8.4.3 Cable Testing
8.5 Grounding Transformers and Phase Reactors
8.6 Capacitor Banks
8.7 Mobile Equipment

9. Power Line Protective Grounding
9.1 Grounding on Metal Transmission Structures
9.2 Grounding on Wood Pole Transmission Structures
9.3 Transmission Line Terminal Ground Switches
9.4 Grounding on Distribution Lines
9.5 Surface Equipment and Vehicle Grounding
9.6 Opening or Splicing Aerial Conductors
9.7 Grounding Insulated Power Cable

10. Care, Inspection, and Testing Protective Grounding Equipment
10.1 Care
10.2 Inspection
10.2.1 Ground Cable Assemblies
10.2.2 Live-Line Tools
10.3 Testing
10.3.1 Ground Cable Assemblies
10.3.2 Live-Line Tools
10.4 Records

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