The British Standard states the requirements for 'Nyvin' type cables for aircraft wiring. The cables are suitable for use in circuits in which the voltage between conductors, between a conductor and a metal braid, surrounding it and between a conductor and the aircraft structure no where exceeds 600 Volts rms and in which the frequency doesn't exceed 1600c/s.

The cables are suitable for use where, in continuous service, no combination of ambient temperature and conductor current produces a stabilized conductor temperature in excess of 105oC .They are suitable for fixed wiring in aircraft at temperature down to 75oC, but are not suitable for severe flexing at temperatures below 30oC

The cables do not support combustion, but they do not comply with the requirements of British Standard G.100 in respect of fire resistance. The cables are suitable for use in areas where ester-base fluids are present.