1. For all residential services over 200 amp capacity or for any residential service where uniterruptable service during maintenance of meter is desired.

2. Apartment building house meters and meters which service exit lights

3. All commercial services using self-contained metering. See DLPUD for prior approval to any exceptions.

1. All by-pass sockets shall be manually lever operated and capable of carrying full-load current of service being metered. (No automatic circuit closing device sockets are permitted.)

2. Lever designed to operate both the by-pass function and to provide secure clamping force to terminal jaws during meter operation and release of tension for removal of meter.

3. By-pass sockets shall be provided with insulated shield between terminals and to protect from accidental shorts and shocks.

I NON-COMBUSTIBLE WALLS (included in this class would be wood framed brick veneered buildings, metal clad steel framed buildings, asbestos-cement-board walled metal framed buildings, and masonry buildings.)

Pad-mounted oil insulated transformers may be located a minimum distance of 24 in. from non-combustible walls if all the following clearances are maintained from doors, windows, and other building openings. A sump shall be installed for transformers if the immediate terrain is not pitched away from the building. If a combustible first floor overhang exists, a 10 ft. distance from the edge of the transformer to the edge of the overhang (combination of vertical and horizontal distance) shall be required in addition to the other clearance as shown.

Pad-mounted oil insulated transformers shall not be located within a zone extending 20 ft. outward and 10 ft. to either side of a building door.

Pad-mounted oil transformers shall not be located within a zone extending 10 ft. outward and 10 ft. to either side of an air intake opening located at the level of the transformer. If the air intake opening is located above the transformer level, the distance from the transformer to the opening shall be a minimum of 25 ft.

The above term "level of the transformer" is to be interpreted as within 10 ft. of the ground.

Pad-mounted oil insulated transformers shall not be located within a zone extending 10 ft. outward and 3 ft. to either side of building window or opening other than an air intake

Pad-mounted oil insulated transformers shall not be located less than 5 ft. from any part of a second story window or opening other than an air intake.

II COMBUSTIBLE WALLS (Included in this class would be wood buildings and metal clad buildings with wood frame construction.)

Pad-mounted oil insulated transformers shall be located at a minimum of 10 ft. from the building wall. In addition to the clearance from building doors, windows and other openings set forth for non-combustible walls. If a combustible first floor overhand exists, a 10 ft. distance from the edge of the transformer to the edge of the overhang (combination of vertical and horizontal distance) shall be required in addition to the other clearances as shown.

If the clearance specified above cannot be obtained, a fire resistant barrier shall be constructed in lieu of the separation. The barrier when required is provided by the customer. The following methods of construction are acceptable:

The barrier shall extend to a projection line from the corner of the pad-mount to the furthest corner of the window, door or opening in question. The height of the barrier shall be 1 ft. above the top of the pad-mounted transformer.

The barrier shall extend 3 ft. beyond each side of the pad-mounted transformer. The height of the barrier shall be 3 ft. above the top of the pad-mounted transformer. If a combustible first floor overhang exists, the 24 in. specified shall be measured from the edge of the overhang rather than from the building.

Pad-mounted oil insulated transformers shall be located such that a minimum clearance of 20 ft. is maintained from fire escapes at all times.

Exception: Pad-mounted transformers may be located closer to a fire escape than the 20 ft. minimum when a fire resistant barrier is constructed around the pad-mounted (side walls and roof). The barrier shall extend a minimum of 1 ft. beyond the pad-mount. The pad-mount and barrier shall not in any way obstruct the fire escape exit. 10 ft. clearance required in front of pad-mounted transformer doors. Adequate transformer accessibility and ventilation must be provided.

Decorative combustible enclosures (fence) installed by the customer around pad-mounted transformers adjacent to a combustible building wall shall not extend more than 24 in. beyond the transformer towards the combustible wall. 10 ft. clearance required in the front of pad-mounted transformer doors. Adequate transformer accessibility and ventilation must be provided.

1. UL approved and to be outdoor rated.

2. Complete with landing pads for cable terminations and for mounting of bar type current transformers.

3. Hinged door, with provisions for locking and sealing.

4. Minimum depth of ten (10") inches with overall dimensions to vary with required ampacity rating.