ECN Forum Forums General Topics of the Trade General Discussion Area 240 Grounded B phase distribution

Steve I am confused.

I work in lot of IT rooms and the supply to an IT room will likely be delta but it is from a 4 wire grounded Wye source and when it is converted down to 208Y/120 that is also grounded.

The only ungrounded systems I run into are in industrial buildings with motor loads and continuity of supply issues.