Hi there, I'm working on replacing a dimmer rack system for theater on a cruise ship. I'm replacing a very old dimmer system with a new ETC Sensor 3 48 module installation rack. Just so we're all on the same page, the new rack is 230V, and requires 3 hot phases, a neutral, and a ground. Standard, right? Now, both from my own observations of the old dimmer rack on the ship, and from what the chief electrician on the ship is telling me, the ship does not actually distribute a neutral conductor. All it distributes is 3 phases of 220V and a ground. And like I said, that is also what I observed from looking at the old dimmer racks. There are just 3 phases of 220V between each phase, and then a ground. So, based off of what I've been taught and experienced, there are multiple things that are wrong with this as compared to 3-phase power on land, right? On the ship I'm reading 220V between each hot phase And i'm also reading 220V between hot phase and the ground. Also not normal, right? Can anyone explain this more? Anyone out there who is more familiar with cruise ship power? Or worked with or installed recent dimmer racks (preferably ETC Sensor) on a cruise ship? I can't actually even be certain the feeder is true 3-phase. It's possible it's some form of transformed split-phase? I haven't been able to ask the chief electrician yet and I do not own a meter with the capabilities of measuring the sine waves. I'm trying to see if it's possible to make things work just using the 3 phases and the ground as a neutral, but I don't know if that would work, be safe, or much less be to code. Ideally, what I want for the new sensor rack is 220-230V three-phase 4-wire plus ground, where: phase to neutral is 220V phase to ground is 220V and phase to phase is 380V Correct? I just want to check my work with others. Any help, thoughts, or comments greatly appreciated. Thanks! Also, just for info, the old dimmer racks are Artick Digilight 12 channel rackmount dimmers. About 18 years old, made in Italy.