Emergency lighting - Specification for component parts of optical fibre systems Ingestion-build-177197 ISO 6947:1990

ISO 6947:1990

The purpose of water trough barriers is to extinguish explosion flames in roadways in underground mines and in this way to limit propagation of explosions

technological

BS 5655-10

Emergency lighting - Specification for component parts of optical fibre systems Ingestion-build-177197 ISO 6947:1990BS 5266 5: 1999 specifies requirements for optical fibres, lightguides, connectors, emission end mounting arrangements and light sources to be used in optical fibre emergency lighting systems. Constructional and performance requirements are given, including performance under fire conditions. The standard is applicable to the component parts of an emergency lighting system using optical fibre lightguides to distribute light from a light source to one