Recent content by Jim Murphy

Bill, in actuality we thought we had all of the circuits identified to three panels and there was some reason to believe we understood the configuration. But now we see that there is a bad control board and firing boards and so we really did not have our understanding of the circuit paths...

A patent? Humm, if I could sell it...... I need the money!

I wrote an update yesterday but don't see it here. So the answer is that there were two additional dimmer racks located in another section of the building. Once we discovered that a whole bunch of things became clear, not the least of which is that the system was wired properly albeit without...

Yesterday were finally able to get back into the building for further research. We did, in fact, finally find a separate architectural breaker panel and two more dimmer panels. Without taking a lot of time, the original configuration of the facility had only breakers for the light fixtures in...

Brief update, on vacation for a few days so can't do further updating for a few days. Spoke with a company rep who indicated that there is no backup power circuit in this system. The circuits were originally pulled to a standard electrical breaker panel. At a later time a reputable electrical...

The facility is a medium size church building that is probably 30 to 40 yrs old. The dimming system was added about 20 to 25 years ago. We were doing our troubleshooting late in the day on Friday afternoon so we were unable to do any research on the configuration as we made this discovery as...

The scenario you suggest where the lamp circuits were wired using 2 hot feeds was my first concern. The installation is very professional but, the dimmer system was clearly installed at some time after the building was completed. Some of the circuits were installed with construction but a number...

That was our first consideration. At this point we have not seen as asbuilt only a prebuild which does not accurately reflect what we physically see. If there is such an arrangement, it is not anywhere in the vicinity as the dimmer racks. Each circuit leaves the rack individually leaving us to...

In troubleshooting an NSI architectural system about 20 years old for irratic behavior we found a bad control module. But, in the process we discovered something I do not understand. We had all lamps at full power and then proceeded to trip the breakers one at a time in an attempt to discover...