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Insulated Jumpers

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Insulated bypass jumper sets are designed to protect personnel from brush or accidental contact while keeping a continuous electrical circuit (electrically bridged) for short periods at a work location. Bypass jumpers  consist of three basic components: one pair of clamps, one pair of ferrules and a length of insulated cable. Skarshaug Testing Lab keeps cable, clamps, and parts on-hand to build jumper sets for any application.

Please see our main offerings, below, listed by category. For questions, price & availability, or needing to place an order please call us at 515-292-1422 or email us at

Insulated Jumper Sets

Skarshaug Testing Laboratory can build custom jumper sets for your application. Send us an email at and we can send price and availability.

  1. Specify the style of insulated clamps. All of the clamps are hand installed wearing rubber insulating gloves, accept either shrouded or unshrouded ferrules and accept insulated cable up to 4/0, 35 kV phase-to-phase. 

  2. Specify the size and length of insulated cable. Salisbury offers 15 kV cable from #2 to 4/0. 25 kV and 35 kV cable are both available in sizes 1/0 and 2/0.

  3. Specify the size and style of ferrules required. The size of the ferrule will be determined by the size of the cable. 


Insulated Jumper Clamps

Insulated Jumper Cable

Ferrules Unshrouded

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