Insulated bypass jumper sets consist of three basic components: a pair of clamps, one pair of ferrules, and a length of insulated cable. Insulating Jumpers must meet ASTM F2321 standards.
Jumper Clamps are available in two main line sizes with a maximum use voltage of 35kV. Jumper Clamps not only provides a superior grip, but also resists ozone cutting and tracking. Being molded of rubber, these handles are inherently impact resistant and extremely durable. The body and jaw are made from a copper base alloy.
Flexible Insulated Jumper Cables are lightweight and resistant to oil, heat, moisture, ozone and abrasion. The cable is embossed every three feet with conductor size and kV rating. All jumper cables use fine stranded conductor and a new EPR low temperature orange CV cured jacket. The fine stranded copper conductor is alloy coated and assembled in a unidirectional rope lay for extra flexibility. The conductor has a semiconducting shield surrounding it to relieve voltage stress and improve dielectric strength and service life.
Ferrules are manufactured in two different styles: unshrouded and shrouded.
Shrouded ferrules are compressed on both the conductor and the insulating jacket of the high voltage EPR cable to reduce bending stress and are also designed to be used on glove-installed high voltage jumpers.
Unshrouded ferrules are crimped to the conductor strands only and can be used on either stick- or glove-installed jumper.
Ferrules are manufactured of 99.5% pure copper with industry standard 5/8”-11 NC threads. Ferrules are topped with a brass hex jam nut and toothed stainless steel lock washer.
Jumper Clamps used as a part of jumper cable assemblies to bypass work areas when equipment is under repair or being upgraded. Jumper clamps are lightweight and impact resistant making them incredibly durable.
Currently, there are no mandated testing intervals for grounding equipment. However, it’s a generally accepted best practice to submit your ground and jumper sets to an electrical test once a year. Factors such as work conditions, how often the equipment is used, and crew care and maintenance of the equipment can influence testing intervals.