3M Scotch 77 Arc & Fire Proofing Tapes
3M Scotch 77 Arc & Fire Proofing Tapes are 0.76mm thick, arc and fireproofing tape designed to protect all types of electrical cables – corrosion protection tapes can be applied over a wide temperature range and is resistant to impact, abrasions and punctures.
Scotch 77 Tape has an unique formulation allowing the manufacture of an unsupported elastomer that expands in fire to provide a thick char build-up between the flame and cable and forms part of the 3M Scotch Electrical Tapes.
This insulating firewall acts as a heat shield and flame barrier, thus protecting the cables joints and accessories.
The dielectric breakdown stated value of Scotch 77 is >10,000V – note this electrical tape product is intended as an outer wrap to provide fire protection therefore the cable voltage is not critical to the application. Since the Scotch 77 fire proofing tape does not have adhesive it is generally installed the over-wrapping with Scotch 69 tape.
Availability: Contact Thorne & Derrick Sales for competitive prices and delivery from stock for 3M Scotch 77 tape.
Specification – 3M Scotch 77 Corrosion Protection Tapes
Scotch 77 tape, manufactured by 3M consists of a flexible conformable unsupported intumescent elastomer. The 3M Scotch tape shall be not less than 0.76mm thick and be capable of cover 100% elongation. The Scotch tape shall be noncorrosive to metallic cable sheaths and compatible with synthetic cable jackets (ie. semi-conducting URD type, polyethylene, PVC, etc). It shall be self-extinguishing and shall not support combustion.
Scotch 77 shall not deteriorate when subjected to water, salt water, gases and sewage.
The wrapped tape shall be secured by a band, consisting of two layers (the second wrapped directly over the first) of glass cloth electrical tape. The completed installation of a single half-lapped layer of arc and fireproofing tape shall be capable of withstanding a high current (60Hz) fault arc temperature of 13,000°K for 70 cycles.
3M Scotch 77 Arc & Fire Proofing Tapes Features
- 3M Scotch 77 is clean and easy to apply
- Provides fault arc protection to adjacent wrapped cables
- Provides additional electrical insulation
- Corrosion protection tape that resists U.V., water, salt water, acids and sewage
3M SCOTCH 77- Applications
- To fire and arc proof control cables when high energy power cables are present
- To fire and arc proof all cables in areas where possibility of fire hazard exists
- To provide additional electrical insulation, thus reducing possibilities of transferred arcs
- To fire and arc proof piping systems (ie. gas, water, or oil lines)
- To fire and arc proof high-energy power cables exposed to failures of high-energy cables
- The installed tape to be secured with 2 layers of 69 glass cloth tape
3M Scotch 77 Arc & Fire Proofing Tapes
|Temperature Range||Withstand extreme temperatures of a high current fault arc (13,000°K)|
|Material Type||Unsupported Intumescent Elastomer|
|Elongation||-18°C : 90%, -12°C : 130%, 23°C : 150%|
|Width x Length||38mm x 6m, 72mm x 6m|
|Dielectric Strength||Electrical Arc Resistance Simulated High current fault arc (13,000°K) – One half-lap layer: 75 cycles, Two half-lap layers: 145 cycles|
|Breaking Strength||1500 PSI|
|Thermal Conductivity||23°C – .078 BTU/hr./ft. °F|
|Adhesion to Steel||Not adhesive coated, it must be held in place after wrapping with bands of Scotch™ 69 Glass Cloth Electrical Tape|
|Adhesion to Backing||Not adhesive coated, it must be held in place after wrapping with bands of Scotch™ 69 Glass Cloth Electrical Tape|
|Flame Retardant||Self Extinguishing|
Flame Testing 3M Scotch 77 Fire Retardant Tape
➡ T&D stock and supply the complete range of 3M Corrosion & Fire Protection Tapes.
3M Scotch Electrical tapes including Scotch 77 are used to cable joint, splice, repair, seal and protect cables against abrasion, fire and corrosion – this includes LV-HV (11kV-33kV cables) – please contact T&D should you require assistance with selecting the correct tape.
Trademarks: 3M, Scotch, Scotchfil and Scotch 77 are all trademarks of 3M Company.
Complete range of 3M Cable Accessories for the repair, joint and termination of LV MV HV cables.