FPL Wye / Open Delta transformers and AT & T / Comcast service pedestals FPL three-phase transformer FPL feeder splice box Service handholes
5.3 Florida Power & Light
Overhead electric infrastructure layout and design is different in nature than underground electric infrastructure layout and design. The Town’ s current overhead system can be generally described as a series of main overhead feeder lines with radial distribution lines that are connected to the feeder lines with fused switches. The feeder lines are interconnected to provide redundancy but generally the radial distribution lines are not interconnected. Conversely, an underground system will have interconnected feeder lines and distribution lines. This enhances reliability of the system as it provides multiple feed sources as opposed to a radial system that provides only one electric feed source.
In general, there is very little choice in the type of equipment that is installed when performing an underground conversion project. All of the equipment and materials that are installed are provided by FPL so that they are consistent with their electrical distribution standards. This is done in an effort to maintain system consistency and cost efficiency in both installation and maintenance. That being the case, there is one equipment aspect of the design where the municipality can make a preference decision. Two types of switch cabinets can be provided by FPL based on preference or circumstance;
the standard switch cabinet or the“ vista” switch cabinet. The standard switch cabinet is the cabinet that is deployed most commonly in the FPL electrical distribution system. The“ vista” cabinet has a slightly smaller footprint, is shorter, and only requires eight feet of clearance on one side of the cabinet rather than two sides like the standard switch. This offers some unique advantages when the equipment is required to be placed in tight spaces or there is an aesthetic requirement that dictates the smaller cabinet. A significant drawback of the vista switch cabinet is that it costs approximately $ 58,000 more than a standard switch cabinet. For this reason, this master plan contemplates that 90 % of the switches to be installed will be standard style switch cabinets.
FPL will perform the electrical design for the program with Kimley-Horn developing the supplemental conduit plans to aid the Town’ s contractor in installing the conduit for the project. FPL has communicated the following general guidelines related to the design of the improvements.
• yAll FPL electric infrastructure shall be designed and constructed in accordance with the FPL Distribution System Standards, latest edition. All electrical design decisions will ultimately be made and / or approved by FPL.
• yIn general, overhead electrical infrastructure located in rear easements will be relocated to a front street location.
• yThe Town is served by 12 separate main feeders that serve specific areas of Town based on electrical load and capacity of the main feeder. Main feeders will not be replaced or upgraded so service areas within the Town will remain the same.
• yAll electrical equipment and materials to be owned and maintained by FPL at the conclusion of the project shall be provided by FPL.
Single phase transformers and AT & T / Comcast service pedestals
• yContractors installing FPL infrastructure must be preapproved by FPL.
• ySwitch cabinets will be required at each of the 12 main feeder landing points in Town. Switch cabinets will also be required to separate underground distribution transformer loops. To the extent practical, standard switch cabinets are to be used. Vista style switch cabinets can be used as circumstances may require.
Town-Wide TOWN-WIDE UNDERGROUNDING OF of UTILITIES Utilities PROGRAM Program
MASTER PLAN DOCUMENT
Document
DESIGN CRITERIA AND CONCEPTUAL DESIGN DATA DESCRIPTION COLLECTION | 37