Longwall Mining History

MDA approval gained for drift & conveyor lighting	1979
World first non-metallic cable coupler/plug	1982
Electronic starter for fluorescent lamps	1983
Ex d Longwall lighting production commenced	1983
Isolator fitted pilot line termination	1984
Launched compact fluorescent lamps in range	1990
Low maintenance Ex e longwall lighting system	1998
IP66 enclosure for Ex e equipment	1998
3 pin non-metallic 10Amp plug/socket	1998
3 phase 20Amp bolted coupler	1999
5 pin 10Amp threaded coupler	2002
Ex m stainless steel enclosure	2002
Safe-T-Glow photoluminescent sleeves	2003
12 Volt Intrinsically Safe Power Supply to 2.5Amp	2004
Local Pilot protection of secondary cables	2005
Extra Low Voltage lighting system	2006
LED lighting system	2007