BS 7655-6.1:1997

This standard BS 7655-6.1:1997 Specification for insulating and sheathing materials for cables is classified in these ICS categories:

• 29.035.20 Plastics and rubber insulating materials

This Section of BS 7655 specifies the requirements for the thermoplastic sheathing compounds listed in table 1. The relevant test methods are given in BS EN 60811, BS 6469 and BS 6425 : Part 1.

NOTE. Requirements for smoke emission, which are based on tests for cables and not individual materials, are given in the relevant cable standard.

This Section is to be read in conjunction with BS 7655 : Part 0, which contains essential provisions for the application of this Section of BS 7655.

Table 1. Types of thermoplastic sheathing compound having low emission of corrosive gases, and suitable for use in cables having low emission of smoke when affected by fire

Type	Maximum material operating temperature °C	General application
LTS 1	—	For use over armoured cables operating at a maximum conductor temperature of 90 °C
LTS 2	—	Intended for use as bedding or sheath for flat wiring cables operating at a maximum conductor temperature of 90 °C General purpose
LTS 3	70
LTS 4	—	For use over unarmoured cables operating at a maximum conductor temperature of 90 °C

Specifies requirements for sheathing compounds type LTS 1, LTS 2, LTS 3 and LTS 4.