In the electrical industry, fire accidents may happen due to overheating of electrical equipment, short circuit faults and any external source of fire. Polymeric Electrical Cables are prone to spread fire along the cable run as the insulation and sheathing materials are of flammable nature. Hence various flame retardants and low-smoke polymers are being used so that the flame spread and toxic gas release can be controlled. There are some special application cables called Fire Resistant cables which need to maintain the circuit integrity of the cable even during fire conditions. The construction of these fire-resistant cables requires fire-resistant insulation to achieve the fire-resistance property. They are such as Glass- Mica tape, Silicone Rubber, mineral insulation, metal insulation and fire retardant coating. There is various International and National standard assessing methods to assess these special cables. In this paper, the fire-resistant insulating materials and their performance during the assessment in achieving the required fire-resistant property are discussed.
- BS 6387- Test method for resistance to fire of cables required to maintain circuit integrity under fire conditions.
- IEC 60331-11- Apparatus-tests for electric cables under fire conditions - Circuit integrity.
- IEC 60331-21- Procedures and requirements - cables of rated voltage up to and including 0.6/1.0 kV.
- BS EN 50200- Method of test for resistance to fire of unprotected small cables for use in emergency circuits.
- Arunjothi R, Thirumurthy, Meena KP. Fire-resistant cables- Heat release measurements. Power Research- A Journal of CPRI. 2022; 18(1):1–7. https://doi.org/10.33686/ pr.v18i1.1082 DOI: https://doi.org/10.33686/pr.v18i1.1082