ASTM F855-25 PDF
Name in English:
St ASTM F855-25
Name in Russian:
Ст ASTM F855-25
Original standard ASTM F855-25 in PDF full version. Additional info + preview on request
Full title and description
Standard Specifications for Temporary Protective Grounds to Be Used on De-energized Electric Power Lines and Equipment — ASTM F855-25. This document specifies the components and test requirements for temporary protective grounding systems (clamps, ferrules, cables, and complete assemblies) used to protect workers by creating equipotential zones on de‑energized electric power lines, stations, and equipment.
Abstract
ASTM F855-25 covers the equipment making up temporary grounding systems used on de‑energized electric power lines and equipment. The standard is organized into four parts—clamps, ferrules, cables, and complete protective grounds—and includes design and performance tests (mechanical torque strength, short‑circuit capacity, continuous current rating, and jacket material testing) as well as guidance on ratings for different X/R (reactance/resistance) conditions.
General information
- Status: Active standard.
- Publication date: January 9, 2025 (designation F855-25).
- Publisher: ASTM International.
- ICS / categories: Electrical engineering / protective equipment (ICS listing cited by distributors: 29.120.50).
- Edition / version: F855-25 (2025 edition).
- Number of pages: 20 pages (standard document length).
Scope
Defines specifications for the components and assemblies that constitute temporary protective grounds for de‑energized electric power lines and equipment. The standard details required tests and performance criteria for clamps, ferrules, and flexible copper cable assemblies, and provides rating tables and guidance for different fault asymmetry (X/R) conditions. It does not address procedural uses, detailed installation practices, or employer safety programs beyond equipment specifications.
Key topics and requirements
- Componentized approach: requirements for clamps, ferrules, cables, and complete ground assemblies.
- Mechanical and electrical tests: torque/mechanical strength and short‑circuit capacity tests for clamps; short‑circuit and continuous current rating tests for ferrules; jacket material and electrical tests for cables.
- Rating tables that address cable melting times and different X/R (reactance/resistance) conditions; includes separate values for low and high X/R situations.
- Specification of preferred units (Newton‑meter primary; inch‑pound values in parentheses) and test method caveats regarding safety responsibilities of users.
Typical use and users
Used by utilities, line contractors, manufacturers of grounding equipment, safety and electrical engineers, procurement/specification writers, and regulatory/compliance personnel. The standard is referenced by employers and safety programs to select and verify equipment that meets required ampacity and short‑circuit capacity for creating equipotential zones when working on de‑energized lines.
Related standards
Commonly used alongside national and industry guidance and regulations for worker protection and grounding, for example OSHA requirements and guidance on temporary protective grounds (1910.269 / 1926.962 and related appendices) and IEEE Guide for Protective Grounding of Power Lines (IEEE 1048 series). These documents complement F855 by covering installation practices, employer obligations, and grounding placement to achieve equipotential zones.
Keywords
temporary protective grounds, grounding clamps, grounding ferrules, grounding cables, equipotential zone, short‑circuit capacity, ampacity, X/R ratio, ASTM F855-25, protective grounding equipment.
FAQ
Q: What is this standard?
A: ASTM F855-25 is the 2025 ASTM International specification that defines the component and assembly requirements and test methods for temporary protective grounding equipment used on de‑energized electric power lines and equipment.
Q: What does it cover?
A: It covers clamps, ferrules, cables, and complete protective ground assemblies including mechanical torque and short‑circuit tests, continuous current ratings for ferrules, jacket material testing for flexible copper cables, and rating guidance for different fault X/R conditions. It does not prescribe employer procedures for use or maintenance beyond equipment specifications.
Q: Who typically uses it?
A: Utility companies, line crews, equipment manufacturers, safety engineers, procurement officers, and regulatory/compliance teams use the standard to specify, purchase, and verify grounding equipment suitable for worker protection on de‑energized systems.
Q: Is it current or superseded?
A: As of its designation F855-25 (2025 edition) the standard is active. Users should confirm the current status or any pending revisions or work items before purchase or specification.
Q: Is it part of a series?
A: F855 is focused on temporary protective grounds; it is often used together with complementary documents such as IEEE 1048 (Guide for Protective Grounding of Power Lines) and OSHA grounding requirements and guidance, but it is a standalone equipment specification rather than one part of a numbered ASTM series.
Q: What are the key keywords?
A: Temporary protective grounds, clamps, ferrules, cables, equipotential zone, short‑circuit capacity, ampacity, X/R ratio, ASTM F855-25.