All service shall be alternating current, 60 hertz. Standard secondary delivery voltages are: Single phase - 120/240 volts. Three phase - 120/240 volts delta, 120/208 volts wye, 277/480 volt wye, 240/480 volt delta as approved by Benton PUD. Service will be provided at the requested voltage only if appropriate distribution facilities exist with which to provide this voltage. 120/208 volts wye and 277/480 volts wye service voltage will be the only voltages available from pad mounted transformers or in areas served by underground distribution facilities. Only a single voltage will be delivered to a facility by Benton PUD unless the load is so great that a Benton PUD standard transformer or transformer bank is not adequate. If additional voltages are required, the customer will reimburse Benton PUD actual cost for the added facility, including the cost of the transformer. Exceptions to these requirements are subject to Benton PUD approval.

In general, delivery voltages and phases will be those available at the point service is desired and, if other phases or voltages are necessary, the rate will be computed in accordance with extension policies and schedules set forth herein.

In the case of large loads, power may be delivered at other voltages approved by the District.

In general, motor loads up to and including 7-1/2 H.P. may be served at 240 volts single phase. Motors of 7-1/2 H.P. to 25 H.P. inclusive, may be served at 240 volts three phase. Motor loads of 25 H.P. or larger may be served at 480 volts three phase.

Benton PUD may require customers to install reduced voltage starting equipment in cases where across the line starting would result in excessive voltage disturbances to the District's system.

Benton PUD may refuse to service loads of a character which are seriously detrimental to the service being rendered to other customers.

Frequency and service voltage ratings are nominal.