So, whaddaheck is the correct answer??? [Linked Image] [Linked Image] [Linked Image] [Linked Image]

Ironically, I have been performing A LOT of Load Calcs + Panel Schedules -vs- Actual In-Field Amperage Tests (before and after the Calcs + Schedules were done), and so far things have been very accurate.

A couple systems (4, to be exact) were 4 Wire "Closed" Delta (3 Transformers, middle one with center tap), and an additional two were 4 Wire "Open Delta Vee Connections" (2 Transformers, largest has center tap).

Had several 3 Wire Deltas (2 Separately Derived Systems, 3 from the Utility guys), ranging from 240V 3Ø 3 Wire Corner Grounded Deltas, to 600V 3Ø 3 Wire Ungrounded Deltas.

Most systems are 4 Wire Wye setups - either 208Y/120V or 480Y/277V.

Anyhow, what's the verdict?

Scott35

Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!