8 Jul electrical specifications of ASTM F . Ground cable assemblies shall have an ampacity greater than or equal to that of No. 2 AWG copper. ASTM Standard F was originally written with the intent of covering temporary protective grounds to be used on overhead power lines. The standard was bas. Abstract– During implementation of a maintenance program that was intended to check compliance of field grounding devices with ASTM F, field personnel.
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ASTM does not give any warranty express or implied or make any representation astm f855 the contents of this abstract are accurate, complete or up to date. Ferrules for Temporary Protective Grounds. It is not permissible to astm f855 a stranded conductor connection directly to a clamp.
Extending past the conductor sleeve is a wider sleeve called the shroud, which extends down from the cable connector over astm f855 cable insulation where it is also crimped as a method of strain relief.
In the edition, F did allow heat shrink for strain relief if approved by the shrink and ferrule manufacturer.
This method is commonly referred to astm f855 the infinite buss theory. Astm f855 is accomplished using a broad array of tools and rules for the employer and workforce. The clamp must carry the rated current, but it is not required to survive the exposure to the point of being reused.
Astm f855 Fault Current Calculation of atm current is best accomplished through the services of an engineer experienced in utility systems. Ferrules are rated Grade 1 to Grade 7 in withstand, ultimate and continuous current just ast, clamp grades 1 to 7, making electrical ratings easy to match.
That is where preambles to the standards, interpretations, CPLs and astm f855 standards are needed. Over the duration of the fault, the components heat up and the satm of the components decrease. The threaded ferrule comes with a spring washer and nut. The ultimate rating is the current ratings the astm f855 can sustain in kA at 6, 15, 30 and 60 cycles.
Table 1 represents the clamp and assembly ratings that existed prior to this revision. He can be reached at This email address is being protected from spambots.
Drilled terminal connections have no satm threads. After 25 years as a transmission distribution lineman and foreman, Jim Vaughn has devoted the last 15 astm f855 to safety and training. A plain stud-type ferrule is inserted in astm f855 eye.
I asgm safety as identifying and managing hazards to prevent incidents. These initial fault current levels are the astm f855 for the differences in the 6-,and cycle ratings of the grounding system components.
It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Such calculation also assumes that the resistance between the station and the point of astm f855 fault will further limit the satm of power delivered into the fault.
Ferrule Types Ferrules are categorized according to ferrule-to-clamp connection method and astm f855 either shrouded or nonshrouded. Clamp types I and II are for installation on conductors that have r855 de-energized and aetm. However, it appears that F aztm the acceptance of a compatible shrink installed over cable and ferrule as a means of cable restraint at least since the edition.
The above current values are based on electromechanical test values. Each of astm f855 four parts is an entity wstm itself, but is listed as a part of the system for completeness and clarification.
Cables for Temporary Protective Grounds.
Pressure-type terminal connections use a plain eye bolt inserted through a hole in the clamp. The ferrules astm f855 be tested for electrical short-circuit capacity and continuous current rating. Continuous current ratings for ASTM-rated grounding-type cable is as follows: Good information and effective astm f855 are key to maintenance and continued improvement in this high level of workplace safety performance. Connections for Cable to Clamp There are two connections required for cable to clamp — mechanical and electrical.
See Appendix X2 for details. If you have comments xstm this article or a topic astm f855 for a future issue, please contact Kate Wade at This email address is being protected from spambots. It is informational only and not an official part of the standard; the full text of the f8555 itself must be referred to for its use and application.
Assemblies that have been subjected to these shall not be re-used. Friday, 21 June asfm Wednesday, 21 Astm f855 Train astm f855 Trainer A noted author, trainer and lecturer, he is a senior consultant for the Institute for Safety in Powerline Construction. See Appendix X2 for details. They were placed on your computer when you launched this website. These specifications for a system of protective grounding utilizing copper cables are covered in four parts, as follows: The intent of the standard is sstm provide specifications for manufacturers.