Scotch 24 Electrical Shielding Tape Data Sheet 1.0 Product Description Weather Resistance (Stretched and Unstretched) Pass Scotch 24 Electrical Shielding Tape is an all-metal, open-weave, shielding braid tape in a flat, cable-like Shelf Life Indefinite form. It is conformable due to the open-weave knit Electrical Properties: construction of two No. 36 AWG tinned copper wires. Test Method Typical Value* Features: Electrical Resistance (3M) Pass (ASTM D-1373-67) - Tinned copper conductors Wire Size Two No. 36 - Stable at elevated temperatures AWG tinned - Oil Resistant copper wires - Compatible with power cable insulations Chemical Properties: - Fire resistant Test Method Typical Value* - Elongates easily to conform to inclined or uneven Ozone Resistant Pass surfaces. (ASTM D-1373-67) - Corrosion resistant Water Absorption Zero - Compatible with all high-voltage splicing and Resistance to Ultraviolet (3M) Pass termination materials - Unaffected by solvents, U.V., ozone, and moisture * All values are averages, based on several determinations, and are - Because of its construction, the tape interlocks not intended for specification purposes. with the previous layer, thereby assuring a tighter wrap (no solder bead is required) 4.0 Specifications - The porosity of Scotch 24 Tape will permit Product complete resin saturation when splicing (Open Specification) - Usable for indoor and outdoor applications Conducting metal tape must be woven of No. 36 AWG tinned copper wire and be capable of operating at the 2.0 Applications emergency cable temperature of 130C/266F. It must be usable uncovered, indoors and outdoors, in a highly To provide shielding for cable joints on shielded stretched condition without corroding, tearing or power cables splitting. It must be nonflammable and be compatible To make the conductive portion of the stress cone with cable oils, common solvents, adhesives, and high- on power cable terminations voltage splicing and terminating insulations. To smooth connector area in oil-filled cables Engineering/Architectural 3.0 Data (Closed Specification) Jointing (splicing) and terminating shall be done Physical Properties: according to the engineering print supplied by the Test Method Typical Value* manufacturer of the jointing or termination materials Thickness 0.016 for the specific cable and approved by the specifying (ASTM-D-1000-76) engineer. Breaking Strength 22 lbs./in. Alternate - the jointing and terminating engineering (ASTM-D-1000-76) drawing shall be compatible with the specific cable Elongation 70% or cables and approved for the specific voltage of (ASTM-D-1000-76) the cable. Page 1 of 2Note: A solder bead across 24 Tape is not necessary 5.0 Characteristics and Test Data to hold it in place. Tests were designed to determine how long a 12-inch Techniques for the proper use of this conductive tape specimen of Scotch 24 Tape would withstand a are contained in standard and special prints available given amount of current before separating. A 20 gram though the 3M Systems for Splicing and Terminating weight was attached to the Scotch 24 Tape to ensure program. They are available through your local 3M contact between the strands of the copper mesh. The Electro-Products Division Representative. test ended when Scotch 24 separated, due to the melting of the tinned copper wires. Figure 2 on the back page illustrates the results. 7.0 Maintenance The data indicates that Scotch 24 Tape has excellent (Shelf Life) current carrying capacities for replacing the Scotch 24 Tape has an indefinite storage life. Because electrostatic shielding in high-voltage cables. of its open-weave knit construction, 24 Tape will not It should not be used as a ground strap or jumper telescope while on the roll. wire because it will not carry the large fault currents The tape can be checked for resistance with an ohm and lightning currents that meter. Probes touching the surface one foot apart often appear in high voltage should measure .092 ohms or less. The tape is not cables. impaired by freezing nor by over-heated conditions. Figure 3 is representative of the method used for 8.0 Availability determining the resistance per foot of 24 Tape. The Scotch 24 Tape is available in 1-inch x 15-foot and 200-gram weight was used 1-inch x 100-foot (job size) rolls. to insure contact between Complete Product and Use Specification are available the interwoven No. 36 wires. Figure 3 through the Electro-Products Division, 3M Company. The resistance is .92 ohms for 10 feet of 24 Tape. 6.0 Installation Techniques When constructing tape terminations and splices, overwrap area according to 3M prints with one half- lapped layer of Scotch 24 Tape to continue electrostatic shielding. When using resin-pressure methods, overwrap splice area with one quarter-lapped layer of Scotch 24 Tape. Solder 24 Tape ends to cable metallic shielding. Caution: Scotch 24 tape should not be used as a ground strap or jumper wire. Its ampacity is not great enough to carry large fault currents. 3M and Scotch are trademarks of 3M Company. IMPORTANT NOTICE Before using this product, you must evaluate it and determine if it is suitable for your intended application. You assume all risks and liability associated with such use. Warranty Limited Remedy Limited Liability. This product will be free from defects in material and manufacture as of the date of purchase. 3M MAKES NO OTHER WARRANTIES INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. If this product is defective within the warranty period stated above, your exclusive remedy shall be, at 3Ms option, to replace or repair the 3M product or refund the purchase price of the 3M product. Except where prohibited by law, 3M will not be liable for any loss or damage arising from this 3M product, whether direct, indirect, special, incidental or consequential regardless of the legal theory asserted. Electrical Products Division 6801 River Place Blvd. Austin, TX 78726-9000 Litho in USA www.3M.com/elpd 3M 2002 78-8126-5662-3-A Page 2 of 2