How To Protect LV MV Cables From Electrical Arc Faults & Fire

Published 02 Jun 2020

3M Scotch 77 Arc & Fire Proofing Tapes

3M Scotch 77 Arc Faults & Fire Proofing Tapes

Electrical Arc Faults

Electrical arc fault generated fires can be of up to 2000 Degrees Fahrenheit.

That’s more than twice as hot as the temperature of the surface of Venus and enough heat to melt gold.

Furthermore, this is more than enough to destroy expensive electrical cables.

The resulting catastrophes of an electrical arc fault generated fire means that we have to find a solution to protect cables against these dangerous and damaging fires.

In this Article we show how 3M Scotch® Fire Retardant Electric Arc Proofing Tape 77, can protect low (LV) and medium voltage (MV) electrical cables from electrical arc faults and their resulting fires.

Arc Faults

Arc Faults Can Be Catastrophic

Protecting cables From ARC Faults

with 3m scotch 77 tape

3M Scotch 77 TapesEven after a short exposure to a flame, an unprotected cable will catch fire, and continue to burn. Increasing the likely-hood of causing other fires and causing additional major damage. One fire could wreak absolute havoc on cables, or the equipment they are connecting.

Unless of course you can help prevent them from catching fire in the first place. Scotch fire retardant electric arc proofing tape, is designed to protect Low Voltage and Medium Voltage cables and cable accessories from arc faults and the resulting fires.

3M Scotch 77 tape can withstand a 2000 degree torch blast from 3 inches away, for 3 minutes.

That’s 3 minutes longer than an unprotected cable.

3M Scotch 77 Tapes are 0.76mm thick, arc and fireproofing electrical tapes designed to protect all types of electrical cables. This insulating firewall acts as a heat shield and flame barrier, thus protecting the cables joints and accessories.

Scotch 77 tape is burn resistant.

It will also help prevent cable jacket material from melting and dripping flames onto whatever lies beneath it. When the flame is taken away from a cable protected by 77 tape, that’s it, it doesn’t continue burning. It doesn’t cause additional fires and when the tape is removed, the cable underneath does not show any significant damage, and should not need to be replaced.

That kind of trusted protection is why electrical professionals around the globe have taken notice. Used properly, Scotch brand fire retardant electric arc proofing tape 77, can be the difference between a small problem, and an expensive catastrophe.

3M Scotch Tapes

Stockists & Suppliers of 3M Scotch Electrical Tapes

SCOTCH 77 Tape

  • Manufacturer: 3M Electrical
  • Brand: Scotch Tapes
  • Stock Code: 3M Scotch 77 Tape
  • Product Category: Electrical Tapes
  • Sub Product Category: Corrosion & Fire Protection Tapes
  • 3M Scotch 77 Tape Application: Protects cable from arc and fire until limiting devices can interrupt faulted circuit. Use on high-energy cables that are within 18″ of other high energy cables. Available in black and white the white version is easily visible and easy to inspect
  • 3M Scotch 77 Roll Sizes:
  • 1-1/2″ x 20′ (38 mm x 6,1 m)
    3″ x 20′ (76 mm x 6,1 m)

➡ Also available from Thorne & Derrick are Cold Shrink and Scotchcast – contact us for prices and delivery for the 3M Scotchcast range of cable joints and resins.

3M Scotch Electrical Tapes

Self Amalgamating Tapes | Mastic Tapes | Corrosion & Fire Protection Tapes

Thorne & Derrick

Approved Suppliers & Vendors To TfL & London Underground

LV, MV & HV Jointing, Earthing, Substation & Electrical Eqpt

Thorne & Derrick International are specialist distributors of LV, MV & HV Cable Installation, Jointing, Duct Sealing, Substation & Electrical Equipment – servicing UK and global businesses involved in cable installations, cable jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV and EHV.

THORNE & DERRICK Product Categories: Duct Seals | Cable Cleats | Cable Glands | Electrical Safety | Arc Flash Protection | Cable Jointing Tools | Cable Pulling | Earthing | Feeder Pillars | Cable Joints LV | Joints & Terminations MV HV