SINGLE ASSEMBLIES. GROUND CLUSTERS. URD GROUNDS
|** The clamps in any assembly can be identical or quite different depending on each grounding application. JM Test Systems stocks a wide variety of clamps for ALL applications. Clamps are offered in either bronze or aluminum alloys and are manufactured to meet the current specifications of ASTM F 855.
To attach a clamp to the grounding cable requires the use of a ferrule. Ferrules are compressed on the strands of the cable to provide a low resistance permanent connection. The size of the ferrule is determined by the size of the cable. Ferrules are manufactured to the specifications of ASTM F 855.
GROUNDS SET CHECKLIST
|1. Specify the clamps. Be sure that the clamp will meet or exceed the max amperage rating of the ground cable that it will be used with.|
|2. Specify the cable. Once the short circuit capacity of the system has been determined, choose the appropriate size cable. Specify the cable length, and the color of the jacket desired.|
|3. Specify the ferrules. The size of the ferrules must match the size of the cable that it will be used with. Specify Copper or aluminum and shrouded or non-shrouded.|
|4. Specify the options. List any optional equipment that is desired. This can include hanger studs, contact studs, heat shrink tubing, markings, clear strain relief, etc.|
|Grounding Cables are made with extra flexible strand of soft drawn #30 AWG (.01”) copper and are available in three different jackets.
The yellow thermoplastic elastomer jacketed cable is the standard for grounding service. It provides a combination of economy, flexibility, and durability. The service temperature ranges from 200º to -50ºF per ASTM F 855, Type I requirements.
The black thermoplastic elastomer jacketed cable has a smaller diameter and thinner jacket material giving it better flexibility than the yellow cable. The service temperature ranges from 200º to -50ºF per ASTM F 855, Type I requirements.
The PVC transparent flexible thermoplastic jacketed cable allows easy inspection for strand breakage. The flexibility decreases with low temperatures. The service temperature ranges from 140º to -40ºF per ASTM F 855, Type III requirements.
The silicone transparent flexible thermoplastic jacketed cable allows easy inspection for strand breakage. The service temperature ranges from 302º to -40ºF per ASTM F 855, Type I requirements.
*Click here to view all grounding cable options.