Core shield (screened only) An electrically continuous shield shall be applied over the core, or core wrap if one is present, and shall comply with the surface transfer impedance requirements of clause 6.4.20. The core shield shall consist of a helical or longitudinal plastic and metal laminated tape, and one or more longitudinal, helical, or braided non-insulated solid tin-coated copper conductor (S) [ drain wire(S) ] of 26 AWG equivalent or larger that are in contact with the metal side of the tape.