Scotch Electrical Shielding Tape 24 Data Sheet September 2016 Description Scotch Electrical Shielding Tape 24 is an all-metal, open-weave, shielding braid tape in a flat, cable-like form. It is conformable due to the open-weave knit construction of two No. 36 AWG tinned copper wires. Features Tinned copper conductors Stable at elevated temperatures Oil Resistant Compatible with power cable insulations Fire resistant Elongates easily to conform to inclined or uneven surfaces. Corrosion resistant Compatible with all high-voltage splicing and termination materials Unaffected by solvents, U.V., ozone, and moisture Because of its construction, the tape interlocks with the previous layer, thereby assuring a tighter wrap (no solder bead is required) The porosity of Scotch Tape 24 will permit complete resin saturation when splicing Usable for indoor and outdoor applications Applications To provide shielding for cable joints on shielded power cables To make the conductive portion of the stress cone on power cable terminations To smooth connector area in oil-filled cables Open Product Conducting metal tape must be woven of No. 36 AWG tinned copper wire and be capable of (Specification) operating at the emergency cable temperature of 130C/266F. It must be usable uncovered, indoors and outdoors, in a highly stretched condition without corroding, tearing or splitting. It must be nonflammable and be compatible with cable oils, common solvents, adhesives, and high-voltage splicing and terminating insulations. Engineering/ Jointing (splicing) and terminating shall be done according to the engineering print supplied Architectural by the manufacturer of the jointing or termination materials for the specific cable and (Closed approved by the specifying engineer. Specification) Alternate - the jointing and terminating engineering drawing shall be compatible with the specific cable or cables and approved for the specific voltage of the cable. 1 of 3 Scotch Electrical Shielding Tape 24 Physical Typical Value* Physical Property (Test Method) Chemical US units (metric) Electrical Thickness (ASTM D 1000-76) 0.016 Properties Breaking Strength (ASTM D 1000-76) 22 lbs./in. Elongation (ASTM D 1000-76) 70% Weather Resistance (Stretched and Unstreched) Passed Shelf Life Indefinite Typical Value* Electrical Property (Test Method) US units (metric) Electrical Resistance (3M) (ASTM D 1373-67) Passed Wire Size Two No. 36 AWG tinned copper wires Typical Value* Chemical Property (Test Method) US units (metric) Ozone Resistance (ASTM D 1373-67) Passed Water Absorption Zero Resistance to Ultraviolet (3M) Passed * All values are averages, based on several determinations, and are not intended for specification purposes. Characteristics Tests were designed to determine how long a 12-inch specimen of Scotch Electrical and Test Data Shielding Tape 24 would withstand a given amount of current before separating. A 20 gram weight was attached to the Scotch Tape 24 to ensure contact between the strands of the copper mesh. The test ended when Scotch 24 separated, due to the melting of the tinned copper wires. Figure 2 illustrates the results. The data indicates that Scotch Tape 24 has excellent current carrying capacities for replacing the electrostatic shielding in high-voltage cables. It should not be used as a ground strap or jumper wire because it will not carry the large fault currents and lightning currents that often appear in high voltage cables. Figure 1 is representative of the method used for determining the resistance per foot of Tape 24. The 200-gram weight was used to insure contact between the interwoven No. 36 wires. The resistance is .92 ohms for 10 feet of Tape 24. Figure 1 Figure 2 2 of 3