The function of the Bonding Jumper can be tailored to perform safety applications.
Did you know that a metal gas pipe in a house, building or running underground probably has a small amount of electrical current
running through it.
This happens for many reasons. Incorrect grounding and or neutral wiring or high voltage running near a metal gas pipe.
It’s probably not enough to give you a shock or even notice in everyday life. However, it has been enough in many instances to cause a spark when separating the pipe for service. Enough if a spark to cause a fire or explosion.
A Bonding Jumper for technicians working in the Natural Gas Industry has been created as a safety tool for technicians servicing gas pipes in the field.
The Bonding Jumpers from Device Technologies, Inc. are intended to create an electrical path around the service area installed by the technician before separating the pipe for servicing.
How do we create an electrical path around the area to be serviced?
We start by clamping the “Bite Clamp” at one end of the service area.
You will notice the teeth on the clamp and the cradle that holds the clamp on center to the pipe from any diameter from ½” to 2”
By clamping the “Bite-Clamp” on the pipe to be serviced in the same fashion as a normal C clamp,
the tool steel teeth dig through years of dirt, dust and paint to create a metal to metal electrical contact
The retractable hose connected to the “Bite-Clamp” that looks like an air hose is just that with one major difference. This hose has a 10 ga. stranded Hi-Flex copper wire running through it to the other end. In the case shown in the picture below the other end is the same clamp and is configured this way for a “Pipe to Pipe” application. This Bonding Jumper can extend up to 12 feet and retract back to 12” to fit back into its carrying case when not in use
With both “Bite-Clamps” installed on the pipe to be serviced on either side of the service area creating an alternative path for any small amount of voltage running through the pipe.
*The pipe within the service area can now be separated without the risk of spark.
Peoples Gas, North Shore Gas, are presently using the Bonding Jumper in Three different configurations.
All Field Technicians are being trained to use these Bonding Jumpers.
The “Pipe to Pipe” Jumper (pictured above) is used to isolate a section of gas pipe to be serviced.
Another style of Bonding Jumper used is the ”Appliance to Pipe” Jumper. The same “Bite-Clamp” onto a supply pipe. The other end uses a steel magnet to adhere to the back of an appliance such as a stove or oven. Shown in fig. 1
“Large Pipe to Large Pipe” shown in fig. 2 is used on large gas mains up to any size.
When using magnets for electrical connection, pipe surfaces should be abraded by sanding or filing to insure good contact.
Although the magnets used have a strength rating of 150lbs.
They can be easily removed by screwing in the threaded T-handle. Shown in fig. 3 .
This contacts a non marring button to the appliance or pipe and lifts the magnet slightly to break the magnetic connection.