Heating cable substantially free from electromagnetic field

Details Heating cable substantially free from electromagnetic field Heating cable substantially free from electromagnetic field

H - Electricity

05

B

H05B 3/56 (2006.01) F24D 13/02 (2006.01)

Patent

CA 2456654

A heating cable is substantially free from electromagnetic field, and comprises a pair or spirally twisted heating wire elements, a tubular sheath made of electrically conductive material covering the pair of spirally twisted heating wire elements, and possibly an insulating jacket covering the tubular sheath. When the spirally twisted heating wire elements are supplied with a current of given amplitude flowing in opposite directions in the heating wire elements, the electromagnetic fields from the respective wire elements cancel each other to provide a heating cable substantially free from electromagnetic field. A method of fabricating the heating cable is also disclosed.

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