This is just an guess but from the picture and the sample Jude showed me the other day, I would say that the 120 V power strip is a auxiliary power system designed to complement the Trol-E-Duct system, which seems to be an integrated material handling and power distributing system. As far as I know 120 VAC is the maximum used in control switches. So if you have a crane running on 480 VAC you would use an auxiliary 120 VAC as control power for the 480 VAC via a contactor. From what I have seen we do not have the actual Trol-E-Duct system installed. Why it was used as a stand alone system at the shop is anyone’s guess, it may just have been marketed under that brand. The actual 3 phase bus looks to be BD Busway system judging by the breaker operator I saw at the bus plugs. Has anyone actually looked inside to see whether it is a 3 conductor or 4 conductor system?
I see three options. One, we luck out and find a supply of the adapters for the Trol-E-Duct system. Two, we run a separate 120 VAC system from an existing panel. Three, we use the BD Busway system and step down the voltage with either a standalone transformer off a bus plug or with a transformer bus plug designed for the BD Busway system.
Another issue is safety, from what I remember the Trol-E-Duct adapters have just one conductor contact on top, which would mean they use the outer steel surface of the strip and the support taps of the adapter as the neutral/ground. From the material condition of our sample I would say that these things may not be worth the trouble. Honestly, I wouldn’t even try to plug ours in with out putting a steel brush to the tabs and rail.
Anyone know where the law stands on installation for non residential wiring? At my last job I ran conduit and wire for backup diesel generators and I am not a certified electrician. As far as I know the electrician just did the final on-site hook ups and inspected my work.