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Apparatus and method are provided for conducting electric current to cryogenic electrical equipment devices. A combination of inner and outer tubes together form a plurality of hollow composite tubes housed in a sheath. Top and bottom block mounting means are fitted to hold the composite tubes and a

Apparatus and method are provided for conducting electric current to cryogenic electrical equipment devices. A combination of inner and outer tubes together form a plurality of hollow composite tubes housed in a sheath. Top and bottom block mounting means are fitted to hold the composite tubes and are affixed to the ends of the sheath. This combination forms a current lead. The current lead is attached to a cryogenic device housing a fluid coolant which moves through the current lead, cooling the current lead as the fluid travels.

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Apparatus for conducting electric current to and from cryogenic electrical equipment, which comprises: (a) a plurality of inner tubes, each having an inside end and outside end, provided with internal conduits substantially traversing the length of said tubes and penetrating said inside and outside

Apparatus for conducting electric current to and from cryogenic electrical equipment, which comprises: (a) a plurality of inner tubes, each having an inside end and outside end, provided with internal conduits substantially traversing the length of said tubes and penetrating said inside and outside ends, said inner tubes being arranged generally parallel to one another in substantially adjacent relation and capable of conducting and transferring electric current and heat; (b) a plurality of outer tubes substantially encasing said inner tubes, said outer tubes having inside ends and outside ends defining openings in themselves, said outer tubes being capable of conducting and transferring electric current and heat, and being in heat conducting and electricity conducting communication with said inner tubes, said inner tubes and other tubes together forming a plurality of composite tubes; (c) a sheath provided with an inside and outside end, defining a channel through itself which penetrates said inside and outside ends, said sheath being mounted to encase said plurality of composite tubes in a bundled arrangement forming apparatus capable of conducting and transferring electric current and heat; (d) top and bottom block mounting means fitted to hold said composite tubes, said mounting means being fixedly held on said ends of said sheath in such relation that the combination of the sheath and mounting means define a chamber capable of sealably holding said composite tubes, said mounting means adapted to receive, conduct and transfer electricity and heat, said sheath, mounting means and composite tubes being combined for creating an electric current lead; (e) vent means, located toward said outside end of said sheath, penetrating said sheath; (f) cryogenic electrical equipment device, capable of being operated by electric current; (g) cryogenic cooling means, housed within and cooling said device; and, (h) means for connecting the inside end of said current lead to said device, so said internal conduits of said composite tubes are in fluid communication with said cooling means so said cooling means is free to move from the inside of said device through said internal conduits of said composite tubes toward said outside end, emerging through said vent means and said outside ends of said composite tubes, cooling said composite tubes and said current lead as the cooling means travels from said inside end toward said outside end and vent means.