Design and certification of a multiple concept system

This paper describes an escape lighting system which uses a low energy electroluminescent lamp of a type which has been successfully used in the aircraft industry for a number of years. The theme of this paper is how the conceptual needs of an escape lighting system which is to be installed on offshore structures can be met. The design takes cognisance of the harsh environment which would exist on such a structure together with functional needs and the requirement for the system to operate in a potentially explosive atmosphere. It would also be necessary to cater for operation of the system during emergency shut down of the supplies on the structure. The overall description of this escape lighting system (known as Exitpath) is: EEx ia IIB [IIC] T4. This comprises: Lamps-EEx ia IIB T4; Power Supply-EEx em[ia] IIB T4; Battery Supply-EEx emd IIB T4, and during the paper some discussion is devoted to the reasons which led to the adoption of the various methods of explosion protection which have been employed