Grounding Cables

Find grounding cable cluster parts, create new & custom configurations, inspect, clean & test your existing grounds inventory – all with JM Test Systems

Electrical Safety Grounding Cable and Grounds Accessories in Stock!

JM Test offers a full service solution for your grounding cable needs. Grounds are built, repaired, and tested to ASTM Standards F855-09 and F2249-03(2009). All products are tested prior to shipping. Most grounding cable options can be tested, repaired and cleaned by our technicians.

Need A Custom Grounding Cable in a Hurry? We Make it Easy

  • Quick turnarounds are available for all stock items
  • Build to your exact specifications
  • From the cable to the clamp we have hundreds of products in stock
  • All grounds are tested by our NAIL Accredited laboratory prior to shipment
  • JM Test offers pick-up and delivery service across Southern and Mid-West US.
  • Onsite Testing available, we come to you! Call us to inquire today!
  • Testing in accordance to all ANSI/ASTM Standards

Salisbury Grounding Cable Accessories in Stock!

Electrical Ground Clusters and Single Grounds

Grounding Clamps
Duck Bill
Dead Front Grounding
“C” Clamp
Ball and Socket
Ball Studs
Flat Jaw

Aluminum Shrouded
Aluminum Unshrouded

Black, Yellow, or Clear

Click the button below to view the full line of grounding cable configurations, clamps, ferrules, and cables.

Grounding cable clamps
Ground cable building
NAIL Accredited Lab

Single Assemblies • Grounding Cable Clusters • URD Grounds

Grounding cable single

Grounding cable cluster

Grounding cable dead front ground sets

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.

Grounding cable parts list

Grounding Cable 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.

Multi angle grounding cable clamp

Multi Angle

Duck Bill grounding cable clamp

Duck Bill

C Clamp for a grounding cable

C Clamp

Ball and Socket grounding cable clamp

Ball & Socket

Flat jaw grounding cable clamp

Flat Jaw

Substation grounding cable clamp


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.

Grounding cable colors yellow black and clear
Plain unshrouded ferrules

Plain Unshrouded

Shrouded ferrules for a grounding cable assembly

Plain Shrouded

Threaded ferrules for a cable cable assembly


Grounding Cable: Purchase, Rent, Parts, Build, Test, & Repair!

Tell JM about your grounding cable needs from custom builds and rental to the individual part# that you need. Each grounding cable is inspected, repaired, and tested to ASTM Standards F855-09 and F2249-03(2009). 

Each grounding cable can be cleaned and repaired

General QuestionRental QuoteNew Purchase QuoteCalibration / Inspect / RepairOther / Miscellaneous