Glasgow Busbar Chamber System. The Glasgow Busbar Chamber System is designed to provide either compact, wall mounting installations or by using optional pedetal sets, easily assembled switchboards. Tested to BS EN 60439-1 with a rated conditional short circuit current rating of 63 kA at 550 V Detachable end plates enable all units to be extended by coupling to a second busbar chamber using extension sets Both top and bottom plates are also detachable so that marking out and machining can be carried out Fabricated from rust-protected sheet steel with a light grey paint finish Pedestal and back-plate sets also available