System and Method for Forming End Terminations of Mineral Insulated Cable

摘要

A method of attaching an end termination assembly to a cold lead of a mineral insulated heating cable. the method comprises removing a portion of a metallic sheath of the cold lead from a proximal end of the cold lead, thereby exposing a conductor of the cold lead. In addition sliding a tubular bushing over the proximal end of the cold lead, and sliding a tubular pot over the proximal end of the cold lead, the conductor thereby projecting from a proximal end of the tubular pot. The method further including aligning a proximal end of the sheath of the cold lead with a proximal end of the tubular bushing, and welding the proximal end of the tubular bushing to the sheath at the proximal end of the sheath. In addition, positioning a distal end of the pot over the proximal end of the bushing, and welding the distal end of the pot to the bushing.

主权项

1. A method of attaching an end termination assembly to a cold lead of a mineral insulated heating cable, the method comprising:
removing a portion of a metallic sheath of the cold lead from a proximal end of the cold lead, thereby exposing a conductor of the cold lead; sliding a tubular bushing over the proximal end of the cold lead, the tubular bushing having:
a first portion extending from a distal end of the tubular bushing and having an outer surface at a first outer diameter and an inner surface at a first inner diameter, the first portion comprising a shoulder extending from the outer surface to a second outer diameter larger than the first outer diameter; anda second portion extending from the first portion to a proximal end of the tubular bushing and having an outer surface at the first outer diameter and an inner surface at a second inner diameter smaller than the first inner diameter; sliding a tubular pot over the proximal end of the cold lead, the conductor thereby projecting from a proximal end of the tubular pot, the tubular pot having a length, measured from a distal end of the tubular pot to the proximal end of the tubular pot, that is longer than the distance from the shoulder of the tubular bushing to the proximal end of the tubular bushing, the tubular pot having a first portion with a first inner diameter, the first inner diameter of the tubular pot being approximately equal to the first outer diameter of the tubular bushing; aligning a proximal end of the sheath of the cold lead with a proximal end of the tubular bushing; welding the proximal end of the tubular bushing to the sheath at the proximal end of the sheath; positioning a distal end of the tubular pot over the proximal end of the tubular bushing; and welding the distal end of the tubular pot to the tubular bushing.