3M 70 Silicone Rubber Tape (1″ X 30′)

Scotch™ Brand 70 Silicone Rubber Electrical Tape is a high-temperature arcand track-resistant tape composed of selffusing, inorganic silicone rubber and easytear and easy-strip liner.

Tape features

• Excellent track resistance.
• Excellent arc resistance.
• Excellent ozone resistance.
• High dielectric strength.
• Class “H” material (180°C continuous operation).
• Workable at extremely low temperatures.
• Excellent conformability.
• Excellent instantaneous fusion; does not need to be held down.
• Matches Sky Blue Gray Munsell 5BG7.0/0.4.
• Excellent weathering characteristics.
• AA-59163 Class-I Type-I.

Applications

• As an overwrap for protection of terminating high-voltage cables against arcing and tracking. High-voltage cables with these insulations should be overwrapped:
  Butyl rubber
  Oil-base rubber
  Ethylene propylene rubber
  P.V.C.
  Low and high-density polyethylene
  cross-linked
• As primary insulation where Class “H” (180°C/356°F) temperatures are encountered i.e., silicone rubber cables.
• As splice overwrap on spacer cable operating at 15 kV and above.

Data
Scotch 70 Tape has a thickness of 12 mils and is available in roll size 1 in. wide x 30 ft. long. The core is 1 in. I.D.

Specifications
Product
The insulating tape must be composed of self-fusing, inorganic silicone rubber with an easy-tearing and easy-stripping polyester liner. The product must be Sky Blue Gray and conform to Munsell Color No. 5BG7.0/0.4. The tape must be capable of operating continuously at Class H temperatures (180°C/356°F). The tape must be compatible with all synthetic cable insulations as well as cable splicing compounds.

Engineering/Architectural Specifications
All tape or tape-like terminations which will be operated either outdoors or in areas subjected to contamination or moisture shall be overwrapped with at least one layer of Scotch 70 Silicone Rubber Electrical Tape.

The exposed cable insulation on the lug side of assembled stress cone kits, which will be operated either outdoors or in areas subjected to contamination or moisture, shall be overwrapped with at least one layer of Scotch 70 Silicone Rubber Electrical Tape.

All splices on spacer cable operating at 15 kV and above shall be overwrapped with Scotch 70 Silicone Rubber Electrical Tape.

All splices on silicone rubber cables or other cables which can operate at room temperatures in excess of 130°C/266°F, but not exceeding 180°C/266°F, shall use Scotch 70 Silicone Rubber Electrical Tape as the primary insulating material.