Well, I don't see any color markings at all. Also I have seen at least one high-leg delta that was color marked as if it were 208 wye.
So have I. It was on a service where the pole mounted transformer bank had been changed from 208/120V to 240 delta high leg but the tape marking on the customer end of the service conductors was not changed. Our site survey guys did not measure the voltage, so when it came time for me to design a PV system for the customer (an automotive body shop), the service conductors color code told me one thing and the pattern of breakers in the MDP told me something else. The customer did not have anyone who felt comfortable checking the voltage, so we had to send someone to the site to do it. It was in Pennsylvania and we were based in Texas.
If I'm forced to guess, I would guess it's 208 wye. But what I'm saying is that while I would wager the cost of a sandwich that it's 208 wye, I would never make the call to wager the cost of inverters.
Looking at the breaker pattern in the MDP in the site assessment photos, I guessed, correctly as it turned out, that it was a 240/120V delta service, but there was no way I was going to design the PV system based on a guess. Had I guessed incorrectly it could have been a very expensive mistake.
In another instance I had to design eleven PV systems for some schools that all had 480/277V services, or so I thought. All eleven of them had 600V service equipment, but one of them was supplied by a 208/120V transformer. Once again, the site assessors did not measure the voltage. I got burned by that one, but I caught the error before the installation started, so all I had to do was completely redesign the system.
ALWAYS, ALWAYS, ALWAYS measure the voltage.
