Electrical Safety Grounding Cable and Grounds Accessories In Stock
Grounding And Jumpers
Find grounding cable cluster parts, create new & custom configurations, rent safety grounds, inspect, clean & test your existing grounds inventory – all with JM Test Systems
A full service solution for your grounding cable needs
- Quick Turnarounds Quick turnarounds are available for all stock items.
- Custom Grounds Available Our custom grounds are built to your exact specifications.
- Large Selection of Inventory From the cable to the clamp, we have hundreds of products in stock.
- Lab Tested All grounds are tested by our NAIL Accredited laboratory prior to shipment
- Pickup & Delivery 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.
- ANSI/ASTM Compliant Testing in accordance to all ANSI/ASTM Standards.
No need to worry about maintenance, repairs or testing cost.
JM Test repairs, cleans and tests ground cables for continuity and resistance values before shipment.
Always in stock and ready to ship
Currently over 400 grounds in our rental inventory.
Get the configuration of cables required for your specific project.
JM Test carries a wide variety of clamps, cable sizes and lengths.
Shipping available nationwide.
JM Test offers fast shipping nationwide.
Renting grounds is often easier and faster.
Buying a new piece of equipment requires multiple people to approve and sign-off on. Renting grounds can alleviate these purchasing complications and keep your job on schedule.
They run a fraction of the cost of buying new.
Rental rates are typically 90% less than the cost of purchasing. There’s no reason to buy equipment that you only use occasionally.
Reduce storage space.
Grounds can be bulky and very heavy. Renting eliminates the need to store them at your jobsite or office facility. JM Test also provides a canvas carry bag for each set of grounds for easier transport.
Grounding Cables, Clamps, Ferrules, Rods, Sleeves & More
A single source solution for high voltage, electrical grounding cable clusters and single assemblies. Rental options, custom builds, parts like clamps and covers, testing, cleaning, and inspection on all ground configurations.
Single Ground Assemblies
4 Way/ Cluster Ground Assemblies
Ball & Socket Clamps
Cable Penetrating Ground Clamp
Clear Plastic Jumper Clamps
Conductor and Cleaning Tools
Dead Front Ground Sets
Duck Bill Clamps
Flat Jaw Clamps
Flexible Insulated Jumper Cables
FRP Jumper Clamps
Plain Unshrouded Ferrules
Pole Mounted Contact Bars
Salcor Jumper Clamps
Screw Ground Rod
Stick Installed Flexible Jumper
Strain Relief Sleeves
Grounding Cable Inspection, Cleaning, & Repair
Our process of handling customers equipment follows the best suggested process, set forth by ASTM, the governing body over testing materials. Our process is as follows:
We review each part and their connections throughout the entire ground/jumper set.
Clamps are checked for functionality. If they fail, we can repair most clamps or replace them if one is too damaged.
Next, we check ferrules and ensure the connection between the clamp and the ferrule is solid and free of debris. (Dirty equipment can have a significant impact on the equipment’s ability to function properly.) The ferrule to wire connection is checked to ensure no cable is damaged or exposed. If there is an issue, we repair it.
Lastly, we check the entire length of the cable for damage to the insulation. We can repair minor damage, shorten the cable length to remove the damage, or replace the cable completely.
After the visual inspection test, the equipment is tested under the procedures outlined in ASTM F2249 for grounds and ASTM F2321 for jumpers. If the equipment fails the testing, we start the process over and attempt to diagnose the exact issue in order to repair the problem part instead of replacing the entire set of equipment. We can probe each piece of the set and determine if just a single ferrule is bad, both ferrules, a connection isn’t quite right, or that the cable is too degraded, ect. JM Test is able to service, repair, or replace all parts in house via our highly trained technicians.
Tags Put On
All items are labelled with calibration tags to clearly show the calibration date and any ID numbers provided by the customer.
Salisbury Grounding Cable Accessories
Electrical Ground Clusters and Single Grounds
∙ Black, Yellow, or Clear
∙ Duck Bill
∙ Dead Front Grounding
∙ “C” Clamp
∙ Ball and Socket
∙ Ball Studs
∙ Flat Jaw
∙ Aluminum Shrouded
∙ Aluminum Unshrouded
∙ Copper Unshrouded
∙ Copper Shrouded
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.
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.
JM Test Systems is compliant with OSHA and NFPA standards including:
NFPA 70E 2021
Additional Literature & Catalogs
BUILT TO YOUR SPECIFICATIONS
Custom Ground Configurations
Our Custom Builder Tool will help determine which grounding components you will need to meet your systems requirements. We keep thousands of pieces in stock in order to build your custom ground assembly quickly.