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									Chapter 3                      IP&L / WP&L                                       Page 25
                          ELECTRIC SERVICE RULES
OVERHEAD SECONDARY SERVICE                                               Issued Jan 2011

301. ATTACHMENT OF SERVICE DROPS
A. The Customer’s structure shall be strong enough to support the service drop and
   high enough to provide code clearance for the service drop and drip loops above the
   ground, buildings, driveways, roads and other facilities.
B. Alliant Energy will supply a standard service attachment device, if requested, and
   the Customer will install the service attachment device in Wisconsin. The Customer
   shall provide and install the attachment device in, Iowa, and Minnesota.
C. For connection to Alliant Energy’s service drop wires, the Customer’s service
   entrance conductors shall project at least 36” beyond the weatherhead for a single
   service riser. See section 305 for length of conductor tails for multiple risers.
D. Neutral conductors are to be identified as Per the NEC.
E. A maximum of three (3) conduit risers will be allowed at the building or structure.
F. The maximum height Alliant Energy will attach a service drop to a building is 20 ft
   above the ground. If a greater attachment height is required, prior approval shall be
   obtained from Alliant Energy engineering.

302. SERVICE MAST CONSTRUCTION
A. Service masts for support (through the roof) shall be constructed of rigid galvanized
   steel (RGS) conduit with an inside diameter of no less than two inches. IMC is not
   acceptable for galvanized steel conduit through the roof. See Table below.
B. That portion of the mast above the uppermost conduit support (roof line) shall be
   continuous in length without couplings.
C. Some service masts over 48 inches may require guying. Contact Alliant Energy
   before constructing masts more than 48 inches above the roof line.
D. Service masts shall not extend more than 6 ft. above any sloped roof. This height is
   measured from the point where the conduit exits the enclosed portion roof to the top
   of the weatherhead.
E. NEC 230.28 - "Only power service-drop conductors shall be permitted to be attached
   to a service mast".
Page 26                         IP&L / WP&L                           Chapter 3
                          ELECTRIC SERVICE RULES
OVERHEAD SECONDARY SERVICE                                      Issued Jan 2011

          ** MAXIMUM HEIGHT OF WEATHERHEAD ABOVE SUPPORT
                     ON AN UNGUYED SERVICE MAST
          Heavy Loaded service drop tension may not exceed 500 LBS.

     Type of                 SERVICE
                 Conductor                 2”        2 ½” *      3” *
     Conduit                  DROP
                   Size                  Conduit    Conduit     Conduit
     Material                LENGTH
                                30’        6’-0”      8’-0”       8’-0”
                                40’        6’-0”      8’-0”       8’-0”
                    #2
                                50’       5’-10”      8’-0”       8’-0”
                 Aluminum
                                60’        5’-1”      8’-0”       8’-0”
                  Triplex
      Rigid                     70’        4’-7”      7’-6”       8’-0”
    Galvanized                  80’        4’-1”      6’-8”       8’-0”
       Steel
      (RGS)                     30’        6’-0”      8’-0”       8’-0”
     Conduit                    40’        6’-0”      8’-0”       8’-0”
                    #1/0
                                50’        5’-0”      8’-0”       8’-0”
                 Aluminum
                                60’        4’-4”      7’-2”       8’-0”
                  Triplex
                                70’       3’-11”      6’-4”       8’-0”
                                80’        3’-7”      5’-8”       8’-0”


* Service masts cannot extend more than 6 ft above any sloped roof regardless
of the slope. They can however extend to more than 6 ft above a flat roof
where a ladder can be safely used .
Chapter 3                      IP&L / WP&L                                       Page 27
                          ELECTRIC SERVICE RULES
OVERHEAD SECONDARY SERVICE                                                Issued Jan 2011

303. .SERVICE MAST INSTALLATION FOR FLAT OR LOW-ROOFED BUILDINGS
UP TO 1200 AMPS – 480 VOLTS MAXIMUM




NOTES:
1. The customer shall consult Alliant Energy before such an installation is planned or
   started.
2. The customer shall install, own and maintain the installation except for Alliant
   Energy’s service drop, connectors and cable dead-end.
3. The Customer shall consult with Alliant Energy for the service cable tensions and
   provide a structure of adequate strength. The installation shall provide adequate
   clearances for the Alliant Energy’s overhead service drop.
4. Refer to Section 617 for overhead instrument transformer metering.
Page 28                         IP&L / WP&L                                   Chapter 3
                          ELECTRIC SERVICE RULES
OVERHEAD SECONDARY SERVICE                                               Issued Jan 2011

 304. SERVICE ATTACHMENT TO BRICK OR MASONRY WALLS AND METAL
 BUILDINGS UP TO 1200 AMPS – 480 VOLTS MAXIMUM




NOTES:
1. The customer shall consult Alliant Energy before such an installation is planned or
   started.
2. The Customer furnishes, installs, and maintains the installation except for Alliant
   Energy’s service cable, and connectors.
3. Consult with Alliant Energy for service drop tensions and provide an attachment with
   adequate strength. The installation shall provide adequate clearances for Alliant
   Energy’s overhead service drop.
4. Refer to Sections 617 for overhead instrument transformer metering installation.
Chapter 3                      IP&L / WP&L                                               Page 29
                          ELECTRIC SERVICE RULES
OVERHEAD SECONDARY SERVICE                                                       Issued Jan 2011

305.   SERVICE RISER REQUIREMENTS




NOTES:
1. Trough must be NEMA 3R and sealable by Alliant Energy.
2. Refer to Section 108 for maximum allowable entrance size for each service voltage.
3. The Customer shall consult with Alliant Energy before planning an installation with multiple
   Risers.
4. Where multiple risers are installed, leave ends at the weatherheads a minimum 60 inches
   long to be connected by Alliant Energy.
Page 30                         IP&L / WP&L                                 Chapter 3
                          ELECTRIC SERVICE RULES
OVERHEAD SECONDARY SERVICE                                             Issued Jan 2011

306.   WALL OR THROUGH-THE-ROOF INSTALLATION

       Utility furnishes, installs & maintains

       1.    Overhead service drop
       2.    Meter
       3.    Cable wire holder WPL


       Customer furnishes, installs, & maintains:

       3.    Cable wire holder – IPL Only
       4.    Conduit or service cable and weatherhead
       5.    Disconnect for 480 volt service
       6.    Conduit or cable supports (as required)
       7.    Approved Meter socket
       8.    Ground in accordance with the code (Refer to Chapter 5)
       9.    Customer’s service entrance panel
       10.   Rigid Steel Conduit
       11.   Conduit Guy if Required – ¼” Min. Galv. Steel
       12.   Bracing between Studs for Guying Hardware
Chapter 3                      IP&L / WP&L                   Page 31
                          ELECTRIC SERVICE RULES
OVERHEAD SECONDARY SERVICE                            Issued Jan 2011

306.   WALL OR THROUGH-THE-ROOF INSTALLATION – CONTINUED
Page 32                         IP&L / WP&L                                                Chapter 3
                          ELECTRIC SERVICE RULES
OVERHEAD SECONDARY SERVICE                                                           Issued Jan 2011

307    POLE MOUNTED SERVICE ENTRANCE UP TO 300 AMP – 240 VOLTS
       MAXIMUM - OPTIONAL CONSTRUCTION
       Utility furnishes, and installs, and maintains:

       1.       Overhead service cable
       2.       Socket type meter



       Customer furnishes installs, and maintains:

       3.       Pole, treated, class 6 minimum, 5” dia. at top, length necessary to meet all
                applicable clearance
       4.       Guy, Galv. stranded steel, ¼” minimum
       5.       Ground in accordance with the code (Refer to Chapter 5)
       6.       Conduit or Service Entrance cable
       7.       Rain-tight weatherhead
       8.       Service entrance equipment
       9.       Approved Meter-socket
       10.      Guy Guard
       11.      Anchor

NOTES:
1. The customer shall consult Alliant Energy before such an installation is planned or started.
2. Our preferred method of construction would be to have this type of service on a building.
3. Customer pole shall maintain minimum 12’ horizontal separation from Alliant Energy
   facilities
Chapter 3                      IP&L / WP&L                     Page 33
                          ELECTRIC SERVICE RULES
OVERHEAD SECONDARY SERVICE                              Issued Jan 2011

       307. POLE MOUNTED SERVICE ENTRANCE UP TO 300 AMP – 240 VOLTS
       MAXIMUM – OPTIONAL CONSTRUCTION CONTINUED

								
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