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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Alternate testing circuits are available for laboratories that cannot achieve the above requirements.
Wstm nut on either side of the terminal is tightened to trap the ferrule in place. The values in parentheses are the inch-pound units. Astm f855, 21 June Shrouded-type ferrules are designed to be used with ASTM-type grounding cable.
The narrow part of the sleeve is the cable connector that astm f855 crimped onto the conductor strands. Astm f855 Logged In Member?: V855 that have been subjected to these shall not be re-used. Referenced Documents purchase separately The documents listed below are referenced within the subject standard astm f855 are not provided as part of the standard.
Plain copper ferrules are usually used with bronze clamps. Clamps for Temporary Protective Grounds.
astj I define safety as identifying and managing hazards to prevent incidents. In engineering terms this is known as DC offset. Ferrules for temporary astm f855 grounds. A plain stud-type ferrule is inserted in the eye.
That is where preambles to the standards, interpretations, CPLs and consensus standards are needed. Guest Friday, 27 July Subscribe to this blog astm f855 Please awtm in your email address to subscribe to updates from this post.
Train the Trainer 101: ASTM F855 Grounding Equipment Specs Made Simple
The values in parentheses are the inch-pound units. Alternate testing circuits are available for laboratories that cannot achieve the above requirements.
It is the responsibility of the user of this standard to establish appropriate safety, health, astm f855 environmental practices astm f855 determine the applicability of regulatory atsm prior to use. Clamp types I and II are for installation on conductors that have been de-energized and tested.
Over the duration of the fault, the components heat up and the ratings of the components decrease. The threaded ferrule is inserted through f55 drilled terminal. In the same way, the initial fault current is high because of the DC component asymmetry, but drops off quickly due to I2r loss.
The above current values are based on electromechanical test values. Continuous current ratings for ASTM-rated grounding-type cable is as follows: This method astm f855 commonly referred to as the infinite buss astm f855.
See Appendix X2 for details. In addition, astm f855 paragraph notes that many of these cables have been tested to the ASTM standard and have been found to meet the requirements of the standard. The ultimate rating is the current ratings the clamp can astm f855 in kA at 6, 15, 30 and satm cycles. There are nine ASTM termination styles designated for ground atsm.
Zstm can change your cookie settings through your browser. The principal difference in each type is the temperature rating of the insulation and stranding of the conductor. The concerns when considering non-ASTM-listed types of cable are insulation performance, proper stranding, quality of the strand lay and alloying of astm f855 copper strand materials in the conductor, all of which affect performance in a fault.
Drilled terminal connections have no astm f855 threads.