CUSTOMER OWNED AND OPERATED ELECTRIC GENERATING EQUIPMENT, NON-PARALLEL OPERATION

The Customer shall contact the Division Office before connecting a generator to ensure that it will not backfeed into the Company's system. Improper operation of generator equipment can cause personal injury as well as equipment and property damage.

CUSTOMER OWNED AND OPERATED ELECTRIC GENERATING EQUIPMENT, PARALLEL OPERATION

Special requirements have been prepared to allow the Company to interconnect with Customer owned generators. The intent of these requirements is to ensure Customer safety, the safety of Company employees and to maintain adequate, reliable service to all Customers. These special requirements are included in the Company's "Standards for the Connection of Qualifying Generating Facilities and Non Utility Generating Facilities Which are Operated in Parallel with Duquesne Light Co." A copy of the standards will be furnished by a Company Representative upon request.

Customers shall not, under any circumstances, parallel a Customer-owned generator with the Company's service without complying with the Company's special requirements and completing the required Interconnection Agreement which will be provided by the Company. Such paralleling may result in hazards to Company and Customer personnel, equipment damage, and loss of service to the Customer and the Company's system. A Customer must submit a completed "Application and Equipment Specification Form" (included in the above standards) to the Company to initiate an interconnection application.

HARMONIC PRODUCING EQUIPMENT

Customers operating harmonic producing equipment such as rectifiers, SCR drives, power supplies, inverters, arc-furnaces, welders, etc., shall limit the voltage distortion injected by their equipment into the Company's system to a total of 3% of the fundamental frequency with no single harmonic exceeding 1% of the fundamental frequency.

CUSTOMER LIGHTNING AND SURGE PROTECTION

The Company provides surge protection on all of its overhead lines to prevent damage from lightning. While it is not the Company's responsibility to protect Customer equipment, this protection has generally proven adequate to prevent damage to normal Customer appliances such as motors, ranges, washers, dryers, lighting, electron tube-type radios and television sets, and other non-solid-state equipment in all but the most severe lightning conditions. However, appliance manufacturers have incorporated solid-state microprocessor-type components in many modern appliances such as microwave ovens, televisions, VCRs and computers. The Company recommends that all Customers make sure that their service is grounded effectively as required in Section 3.4 and provide surge protection devices as described below.

A secondary surge protector should be installed at the service by a qualified electrical contractor or the Company. These devices, sometimes referred to as low voltage lightning arresters, are available in several configurations from electrical suppliers. The Company is offering this protection through the "Surge Shield" program at an affordable cost, call 1-888-393-7900. A surge protector at the service is necessary to dissipate the energy from large surges to ground.

A surge-suppressor plug-in device should be placed between all appliances, computers and equipment with solid-state or micro-processor components and the outlets supplying them. These devices dissipate the short time low energy surges, some of which are caused by the operation of other home appliances, and are available from most appliance or hardware stores.