I remember a General Electric LV control system which was installed in a church built in 1970. The system was used to control the sanctuary lighting. There were 12 circuits, controlled from two locations - the pulpit, and a control room at the rear of the sanctuary (which also contained the Relay enclosure, two breaker panels, 480/277 - 208/120 transformers, dimmers, and the sound system mixer/amplifiers). The controllers had two 12-position dials, one for ON and one for OFF. turn the dial to a circuit number and push to operate - or else hold the dial in and turn it to operate a number of circuits quickly.
Quite a durable system. It still works perfectly, although the sound system had to have a major re-build - lots of hum and noise from all that power equipment nearby.
Last edited by mamills; 07/18/07 08:52 AM.