On 11/26/13 11:55 AM, bud-- wrote:
On 11/26/2013 10:57 AM, wrote:


You are the king of pictures.

(But that should further confuse Danny. Maybe if he started with the
basics...)


There is also a corner grounded delta but you usually only see it in
places like sewer lift stations where there is no L/N load at all.
The equipment will look exactly like single phase with 2 pole breakers
and a white neutral but the voltages are 240 to ground on the
ungrounded legs and 240 P to P

Corner grounded delta is also common, I have heard, for center pivot
irrigation. Not likely something you have in Florida.

At least three of the local REAs use the 480v corner ground delta
for irrigation here in south central Nebraska. One uses the 480v
center tap delta.
I haven't seen any circuit breakers used for irrigation. Everyone
still uses fuses. Electricians do use breakers for grain bin and
building power though. There are a lot more circuits needed for grain
handling and buildings. Plus condensation isn't the issue it can be
with irrigation.