(a)

Standard Service Voltages

(b)

Residential Service

(c)

Combine Three Phase and Single Phase Loads

(d)

Customer Loads Under 10KW Diversified

(e)

Meter Base Not Used as Junction Box and/or Pull Box

NOTES:

1.

2 Wire Service Limited

2.

Residential Service at 120/208 Volts

3.

Single Phase, 3 Wire Service

4.

Three Phase, 4 Wire, 240 Volt, Delta Service

5.

Three Phase, 3 Wire, 480 Volt, Delta Service

6.

Three Phase, 4 Wire, 480Y/277 Volt Service

Secondary service is provided from the nearest suitable distribution line and, where required, PPL EU installs, owns and maintains one transformation from line voltage to one of the following standard secondary service voltages:

PPL EU has different ways of providing combined three phase power and single phase lighting loads for service to Industrial and Commercial services.

For this reason each proposed new or additional load of this type shall be referred to PPL EU for full information on the kind of service to be provided.

PPL EU 's standard service for loads less than 10 KW is single phase, 3 wire, 120/240 Volts.

PPL EU will install three phase, 4 wire, 120/240 Volt or 208Y/120 Volt service. If requested by a new customer whose three phase diversified peak demand is less than 10 KW then the customer pays to PPL EU the difference in cost between the three phase and single phase service.

Meter bases and the termination compartments of multiple position meter bases shall not be used as junction and/or pull boxes. Splices (bugs) are not permitted in the meter base and termination compartments.

See Rule 15(c) for instrument transformer cabinets.

In areas where the secondary distribution system is 208Y/120 Volts, three phase, 4 wire (grounded neutral), residential buildings with one or two dwelling units are served through a single phase, 3 wire, 120/208 Volt common service.

Residential buildings with three or more dwelling units are served through a three phase, 4 wire, common service and the individual single phase, 3 wire, 120/208 Volt sub-services to the individual dwelling units shall be balanced as nearly as possible on the three phases.

All services, other than residential, are served through three phase, 4 wire services except small establishments with limited loads requiring a service of 100 Ampere or less capacity. They may be served through a single phase, 3 wire service.

Three phase, 4 wire (grounded neutral), 240 Volt delta connected service is provided for commercial and industrial service where three phase distribution is available.

Lighting and single phase power at 120/240 Volts are served through the common service drop from the transformer with the grounded center tap.

On underground residential distribution systems, delta served load shall be limited to those loads which can be provided by an open Wye-open delta transformer bank.

Three phase, three wire, 480 Volt delta connected service is provided only for commercial and industrial service.

PPL EU can provide single phase, 3 wire service at 240/480 Volts for special applications, such as street lighting, highway lighting and special electric heating equipment at the customers expense.

Three phase, 4 wire, 480Y/277 Volt service is provided for commercial and industrial services when 12 KV service is available.

The maximum transformer bank on a single pole cluster mounted overhead installations is limited to a capacity of 500 KVA.

See Rule 9 for details and specifications for installation of distribution type transformers in a vault or a pad mount three phase transformer.