I am building a new shop and the local utility has two options for 3 phase service.
1) The utility can put 2 transformers in the Southeast corner of the property and then feed back to the meter. The meter has to be in the front part of the property where the utility can walk up to it. Probably on the fence wall. It would then feed back to the new workshop the feed from the meter to the shop would be about 75 feet. The voltage would be 120/240 volts- 3 phase 4- wire Delta. We can get 400 or 600 amps. The owner needs to make sure his equipment can run on 240 volts ( not the same as 208 volts). SRP has a limit of 43 kw of 3 phase power equipment that can be used at one time. The 30hp belt sander and the 7.5 HP dust collector put us at that limit.
2) The other option is to feed from the Northwest corner of the property, however this would require an 12’ wide easement all the wall along the East property line from the front to the back. We could get 120/208 volt 3 phase – 4 wire with this option. The metering location requirements would be the same as above.
I will be buying some new larger 3 phase machines, like a 10 HP planer, and a wide belt sander. Does it matter if I have 208 or 240? Which is more common?