electric service rules

2O14
ELECTRIC SERVICE R U L E S
SUPPLEMENT
 GENERAL INFORMATION
 CLEARANCES
 DISTRIBUTED GENERATION
 GROUNDING
 HUD MANUFACTURED
 METERING
 OPTIONAL STAND-BY
 OVERHEAD AND UNDERGROUND SERVICE
 PRIMARY, SPECIAL AND FARM SERVICES
 SPECIAL EQUIPMENT & MOTORS
 TEMPORARY SERVICE
© 2014 Alliant Energy 1605939 1/14 JS
Electric Service Rules Manual
Supplement for 2014
TABLE OF CONTENTS
INFORMATION
PAGE
ESR 110C – Revision ................................................................S1
Aluminum Bonding Jumper – Revision ........................................S2
Copper Bonding Jumper – Revision ............................................S3
Overhead Clearance Chart – Revision .........................................S4
Pad-mount Transformer Location – Revision ...............................S5
ESR 903 Holiday Lighting Drawing – Addition ..............................S6
ESR 900 – Update ....................................................................S7
ESR 901 – Update
..................................................................S8
Supplemental Drawing for Wireless Attachment ...........................S9
ESR 530A Distributive Generation (Net-Metered Self-contained
277/480 Volt) – Addition ..........................................................S10
ESR 530B Distributive Generation (General Service Instrument
rated with Net Metering) - Addition
.........................................S12
ESR 109C – Addition ................................................................S14
ESR 115C – Addition for Clarity
ESR 402A Revised for Clarity
...............................................S15
..................................................S16
Typical Installations – Supplemental Information Only .................S17
SUPPLEMENT
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25
13200 GY / 7620 Z-Tap
120/240
50
13200 GY / 7620 Z-Tap
120/240
100
13200 GY / 7620 Z-Tap
120/240
167
13200 GY / 7620 Z-Tap
120/240
2.21
1.97
2.03
2.22
104
208
417
696
45.25
50.76
49.26
45.05
4,713
10,575
20,525
31,344
7KUHH3KDVH%DQNRI3ROH0RXQW7UDQVIRUPHUV
75
13200 GY / 7620 Z-Tap
120/208
150
13200 GY / 7620 Z-Tap
120/208
300
13200 GY / 7620 Z-Tap
120/208
500
13200 GY / 7620 Z-Tap
120/208
75
13200 GY / 7620 Z-Tap
277/480
150
13200 GY / 7620 Z-Tap
277/480
300
13200 GY / 7620 Z-Tap
277/480
500
13200 GY / 7620 Z-Tap
277/480
2.21
1.97
2.03
2.22
2.21
1.97
2.03
2.22
208
416
833
1388
90
180
361
601
45.25
50.76
49.26
45.05
45.25
50.76
49.26
45.05
9,420
21,136
41,022
62,518
4,082
9,159
17,776
27,091
6LQJOH3KDVH3DG0RXQW7UDQVIRUPHUV
25
13200 GY / 7620 Z-Tap
240/120
50
13200 GY / 7620 Z-Tap
240/120
100
13200 GY / 7620 Z-Tap
240/120
167
13200 GY / 7620 Z-Tap
240/120
2.11
2.11
2.24
2.24
104
208
417
696
47.39
47.39
44.64
44.64
4,937
9,874
18,601
31,064
7KUHH3KDVH3DG0RXQW7UDQVIRUPHUV
75
13200 GY / 7620 Z-Tap
208Y/120
150
13200 GY / 7620 Z-Tap
208Y/120
300
13200 GY / 7620 Z-Tap
208Y/120
500
13200 GY / 7620 Z-Tap
208Y/120
750
13200 GY / 7620 Z-Tap
208Y/120
1000
13200 GY / 7620 Z-Tap
208Y/120
3.77
4.09
4.13
3.58
5.77
5.75
208
416
833
1388
2082
2776
26.53
24.45
24.21
27.93
17.33
17.39
5,522
10,180
20,163
38,768
36,081
48,275
3.51
4.14
3.99
3.90
5.76
90
180
361
601
902
28.49
24.15
25.06
25.64
17.36
2,570
4,358
9,044
15,421
15,662
75
150
300
500
750
13200 GY / 7620 Z-Tap
13200 GY / 7620 Z-Tap
13200 GY / 7620 Z-Tap
13200 GY / 7620 Z-Tap
13200 GY / 7620 Z-Tap
480Y/277
480Y/277
480Y/277
480Y/277
480Y/277
Page S2
SUPPLEMENT
IP&L / WP&L
ELECTRIC SERVICE RULES
Issued Jan 2014
SUPPLEMENT
IP&L / WP&L
ELECTRIC SERVICE RULES
Page S3
Issued Jan 2014
Page S4
SUPPLEMENT
IP&L / WP&L
ELECTRIC SERVICE RULES
Issued Jan 2014
SUPPLEMENT
IP&L / WP&L
ELECTRIC SERVICE RULES
Page S5
Issued Jan 2014
Page S6
SUPPLEMENT
IP&L / WP&L
ELECTRIC SERVICE RULES
Issued Jan 2014
SUPPLEMENT
IP&L / WP&L
ELECTRIC SERVICE RULES
Page S7
Issued Jan 2014
CHAPTER 9
ELECTRIC SERVICE RULES – UTILITY/CATV SERVICES 900. GENERAL A. Alliant Energy receives many requests for electric service from other utilities; telephone, telecommunications companies, cable television, the Department of Transportation and local municipalities. This section of the Electric Service Rules has been established to deal with service requests from these customers. Many of these services include a request to place a meter socket and/or disconnect devices on Alliant Energy poles. Requests involving attachments of customer equipment, disconnects, power supplies, risers, and meter sockets can create conditions where the pole becomes cluttered, making it very difficult and dangerous to climb. Requests for underground service to customer owned underground termination and/or metering facilities may or may not meet requirements set forth by Alliant Energy for service. We will look at each request on an individual basis. B. The preferred method for these types of service will be to an approved meter pedestal with or without fused disconnects as shown in Section 902. C. Alliant Energy will not allow meter sockets or customer’s power equipment on the following poles: transformer bank poles, capacitor poles, riser poles, three‐phase switch poles, three‐phase buck arm corner or tap poles, and ornamental lighting poles. Meters or metering facilities will not be allowed on Alliant Energy poles, except where a prior joint use attachment agreement exists between Alliant Energy and the party requesting the service. D. When the customer’s equipment, risers and meter‐sockets are allowed on Alliant Energy poles, they may not occupy more than two adjacent quadrants. Clearances shall be maintained as indicated in the NESC and NEC and any local or state codes. Written approval or a signed Attachment Agreement shall also be obtained from Alliant Energy before any of these attachments are placed on Alliant Energy poles. Failure to get approval will result in immediate removal of the non‐approved facilities. E. Alliant Energy personnel will review municipal attachment requests for Christmas lights or decorations on poles. These attachments may be allowed if adequate space is available to meet NESC requirements and if the customer provides a fused weather tight GFCI receptacle at the point of service connection. All wires serving Christmas decorations will be strung from pole to pole. In no case will Alliant Energy provide service to Christmas decorations from pole to building. F. WiFi installations are allowed on Alliant Energy facilities. They require a signed WiFi Agreement through the Joint Facilities group before any facilities will be considered for placement. Contact the Alliant Energy Joint Facilities Coordinator for further information. Page S8
UTILITY/CATV SERVICES
IP&L / WP&L
ELECTRIC SERVICE RULES
Issued Jan 2014
901. UTILITY/CATV POLE‐MOUNT SERVICE, 120/240 VOLTS, SINGLE‐PHASE, 3‐WIRE, 200 AMP MAX. (CATV, TELEPHONE, MUNICIPAL W/ EXISTING ATTACHMENT AGREEMENT PRIOR TO YEAR 2002 ) Utility furnishes, installs & maintains 9. Service conductors and connections 10. Meter Customer furnishes, installs, & maintains 1. 2. 3. 4. 5. 6. 7. 8. Service Weather head Service Entrance Conduit Service Entrance Conductors Weather Proof Service Fused Disconnect Cable TV Power Supply or equivalent device Ground in accordance with the code (Refer to page 200‐203) (2) – 8’ Ground rods Meter Socket NOTES: 1.
Non‐Metallic conduit, (Schedule 80). If metallic conduit is used, it shall be covered with a non‐
2.
3.
4.
5.
6.
7.
8.
9.
10.
metallic covering 40 inches above and 40 inches below any communication attachments. The service entrance conductors shall extend at least 36” beyond the service head to permit proper connections. The disconnect power supply unit, meter socket and TV cable shall be mounted on the same quadrant of the pole. When a unit contains both the service switch and the power supply, installation height shall be in accordance with applicable codes. Power supply units may not be mounted on poles where transformer banks, risers, vertical supply conductors to aerial services, switch handles, traffic signal, capacitor banks or similar fixtures exist. Power supplies may not be mounted on three phase distribution corner poles or tap poles. When foreign facilities are attached to a pole supporting a lighting fixture, a clearance of 20” is required. Bonding should be provided between all metallic power and communications apparatus. Minimum wire size shall be number 6 AWG and maximum wire size shall be 4/0. Residential meter sockets are acceptable for service entrances 60 amps or less. For service entrances 100 amps or larger commercial meter sockets are required. All installations shall conform to the National Electrical Code, the National Electrical Safety Code, Iowa, Minnesota and Wisconsin State Electrical codes for clearances and working space. U-GUARD
40" MIN.
STREET
STREET
NO COMMUNICATIONS
EQUIPMENT
THIS
IN
SPACE
PEDESTAL
MIN.
ANTENNA CABLE AND
GROUND W IRE UNDER
U-GUARD
MIN.
12"
72" MIN.
40" MIN.
12"
ENCLOSURE(S)
NOTE:
DRI
LLI
NG OF POLE FOR CELLULAR
EQUI
PM ENT I
S NOT ALLOW ED.
ALL EQUI
PM ENT I
S TO BE BANDED
TO THE POLE.
18’ MIN.
POLE EXTENSI
ONS ARE NOT ALLOW ED.
I
F ADDI
TI
ONAL HEI
GHT I
S REQUI
RED,
POLE I
S TO BE CHANGED OUT.
ESR
902
UG
SERVICE
PEDESTAL
8’ 0" MIN.
2" DIA
8’SCH
ABOVE GRADE
9’ 0" MIN. ABOVE GRADE
SCHEDULE 80 IN THIS AREA
12’
-0" MIN.
80
PVC
INSTALL END
INSTALL EXPANSION
JOINT
IN
BOTH
RUNS.
24" MIN.
CONDUIT
BELLS
ON CONDUIT
MIN.16" RADIUS
ELBOW
CONFI
DENTI
AL
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PM ENT
BETW EEN SUPPLY AND COM M UNI
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RELESS CELLULAR SYSTEM S
ATTACHM ENT REQUI
REM ENTS
FOR EQUI
PM ENT
APPLI
CABLE DRAW I
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X.
doc
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DATE:
03/11/2013
REV:
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Page S10
SUPPLEMENT
IP&L / WP&L
ELECTRIC SERVICE RULES
Issued Jan 2014
530A. NET‐METERED SELF‐CONTAINED GENERAL SERVICE with SELF‐CONTAINED DISTRIBUTED GENERATION 0 – 300 AMP 3PH 277/480 Utility furnishes, installs & maintains 1. Meter Customer furnishes, installs, & maintains 2. Approved Meter Socket 3. Service Entrance Panel 4. Disconnect Switch 5. Load Break Switch 6. Approved Termination Cabinet 7. Expansion Joint 8. Grounding in accordance with the code (Refer to page 156‐159) 9. IEEE 1547 / UL 1741 Certified Inverter 10. Underground Feed NOTES: 1.
2.
3.
4.
5.
The applicant shall label the interconnection disconnect switch “Interconnection Disconnect Switch” by means of a permanently attached sign with clearly visible and permanent letters. The applicant shall provide and post its procedure for disconnecting the DG facility next to the switch. A separate DG disconnect is not required if DG Service Entrance includes a disconnect switch with a visible break and can be locked open. The DG disconnect and its location shall conform to technical guidelines and state requirements. Consult with Alliant Energy for details and specifications. Communication intersystem bonding is not allowed on or in any metering device. Intersystem bonding may only be done at the ground rod(s), on the Grounding Electrode Conductor or ground bus in customers main disconnect. 6.
NEC 408.36 (D) – Requires back‐fed breakers to be secured in place. 7.
NEC 705.12 (D) (7) – Requires the breakers from an inverter to be located at the opposite end of the bus as the main breaker. A label is required on the circuit breaker panel reading : “ WARNING ‐ INVERTER OUTPUT CONNECTION DO NOT RELOCATE THIS OVERCURRENT DEVICE” 8.
NEC 705.12 (D) (2) Bus or Conductor Rating. The sum of the main breaker and the distributed generation breakers are limited to 120 percent of the bus rating. 530A. NET‐METERED SELF‐CONTAINED GENERAL SERVICE WITH SELF‐CONTAINED DISTRIBUTED GENERATION‐ CONTINUED Issued Jan of 2014
SUPPLEMENT
100 – 300 AMP 3PH 277/480
Page S11
IP&L/W P&L
ELECTRIC SERVICE RULES
Page S12
SUPPLEMENT
IP&L / WP&L
ELECTRIC SERVICE RULES
Issued Jan 2014
530B. GENERAL SERVICE INSTRUMENT TRANSFORMER WITH NET‐METERED DISTRIBUTED GENERATION 301 – 800 AMP 1 PH 120/240 301 – 800 AMP 3 PH 120/208 Utility furnishes, installs & maintains 1. Meter Customer furnishes, installs, & maintains 2. Approved Meter Socket 3. Service Entrance Panel 4. Disconnect Switch 5. Approved CT Cabinet 6. Optional Overhead Feed 7. Expansion Joint 8. Grounding in accordance with the code (Refer to page 156‐159) 9. IEEE 1547 / UL 1741 Certified Inverter 10. Underground Utility Feed NOTES: 1.
The applicant shall label the interconnection disconnect switch “Interconnection Disconnect Switch” by means of a permanently attached sign with clearly visible and permanent letters. The applicant shall provide and post its procedure for disconnecting the DG facility next to the switch. 2.
A separate DG disconnect is not required if DG Service Entrance includes a disconnect switch with a visible break and can be locked open. 3.
The DG disconnect and its location shall conform to technical guidelines and state requirements. Consult with Alliant Energy for details and specifications. 4.
Communication intersystem bonding is not allowed on or in any metering device. 5.
Intersystem bonding may only be done at the ground rod(s), on the Grounding Electrode Conductor or ground bus in customers main disconnect. 6.
NEC 408.36 (D) – Requires back‐fed breakers to be secured in place. 7.
NEC 705.12 (D) (7) – Requires the breakers from an inverter to be located at the opposite end of the bus as the main breaker. A label is required on the circuit breaker panel reading : “ WARNING ‐ INVERTER OUTPUT CONNECTION DO NOT RELOCATE THIS OVERCURRENT DEVICE” 8.
NEC 705.12 (D) (2) Bus or Conductor Rating. The sum of the main breaker and the distributed generation breakers are limited to 120 percent of the bus rating. Page S13
Issued Jan of 2014
SUPPLEMENT
IP&L/W P&L
ELECTRIC SERVICE RULES
530B. GENERAL SERVICE INSTRUMENT TRANSFORMER WITH NET‐METERED DISTRIBUTED GENERATION 301 – 800 AMP 1 PH 120/240 301 – 800 AMP 3 PH 120/208 Page S14
SUPPLEMENT
IP&L / WP&L
ELECTRIC SERVICE RULES
Issued Jan 2014
connecting to the supply side of the service disconnect as allowed in NEC 230.82. The Customer’s special service will then be served along with the main service from a single common drop or lateral. As an alternative, a customer may also have a separate service drop or lateral, and meter. These services are treated as standby services /duplicate facilities according to Alliant Energy’s extension rules. 1). Fire Pumps 2). Emergency systems 3). Legally required standby systems 4). Optional standby systems 5). Parallel power production systems 6). Systems designed for connection to multiple sources of supply for the purpose of enhanced reliability f. Special Occupancies Exceptions For row‐house construction a separate drop or lateral may be provided for each two attached units. (Buildings must comply with the unique building codes specifically intended for row‐houses only). This does not apply for condominiums. See item (B‐1) above in this section (distance requirement) for condominium projects exceptions. g. Zero Lot line Buildings 1. Buildings separated by a common wall; a. If it’s one building; then one service lateral with a multi‐meter socket b. If the buildings have a fire wall(s)(1) as allowed by the local Authority Having Jurisdiction (AHJ), then each building may have a separate service. Fire barriers shall extend from the top of the floor/ceiling assembly below to THE UNDERSIDE OF THE ROOF SLAB OR DECK ABOVE, (IBC Chapter 7), no HVAC vents or other piping between the units through the firewall, and no metallic paths may bond the two units together. C. UNDERGROUND NETWORK SERVICES a. Underground network service shall comply with the Network Standard. b. Totalization meters may be used within the underground network system(s). The meter shall serve only one customer with facilities located contiguously within one city block having loads in excess of 500KW at 277/480V or an equivalent load. AE will review each request to determine the feasibility and cost of such metering schemes. SUPPLEMENT
IP&L / WP&L
ELECTRIC SERVICE RULES
Page S15
Issued Jan 2014
capacity. Adjustable breakers, whose maximum rating either individually or in combination, exceeds the rating of the self‐contained meter are prohibited. F. Meter disconnect switches nominally rated not in excess of 600 volts shall have a short circuit rating equal to or greater than the available short circuit current. These devices shall also be grounded and bonded according to parts V & VII of Article 250. (NEC 230.82) 115. CHANGES TO CUSTOMER’S EXISTING SERVICE‐ENTRANCE EQUIPMENT A. When the Customer is changing the ampacity of their service disconnect(s), they must meet the current version of the NEC and the ESR Book. B. When the customer modifies their service in any way that requires them to adhere to the current NEC they must also adhere to the current ESR Book. C. Moving or relocating the service entrance to new or different location shall constitute an upgrade. 116. ALLIANT ENERGY EQUIPMENT ON CUSTOMER PREMISES A. Customers shall grant Alliant Energy the right to install its equipment on the Customer’s premises to supply service. All such equipment shall remain Alliant Energy property and may be removed when service is no longer required. B. Alliant Energy shall have the right of access to its equipment located on Customer premises for inspection, maintenance, restoration and removal of service. The Customer shall provide without cost to Alliant Energy the necessary easements and/or right‐of‐way for Alliant Energy personnel to install, maintain, and access to electric facilities on the Customers property, that provide electric service to the Customer. This will include permission to trim and/or remove trees and brush that may interfere with the installation and operation of Alliant Energy’s facilities. C. Customers are expected to take reasonable care of Alliant Energy equipment located on their property. Customers will be responsible for all damages to or loss of Alliant Energy property located on their premise, unless damage is by causes beyond their control. The Customer shall not grant authority to anyone who is not an employee of Alliant Energy to open or operate Alliant Energy equipment. D. Alliant Energy will attempt to give advance notice when accessing Alliant Energy facilities on the Customer's property, but may not be able to do so during emergencies. Page S16
SUPPLEMENT
D.
E.
F.
G.
IP&L / WP&L
ELECTRIC SERVICE RULES
Issued Jan 2014
The Customer shall install, own and maintain all service entrance facilities other than the service lateral, meters, instrument transformers, and instrument transformer wiring. All underground service cables shall be protected from physical damage. See Rigid Conduit in Section 407. NEC 230.49‐50 & NEC 300.5 All equipment utilized for the termination of Alliant Energy service conductors shall have provisions which include landing pads and set screw connectors. Alliant Energy will install a service lateral when the proposed cable route is clear of all obstructions and within 6 inches of final grade. The Customer shall clear a 10 foot wide cable route of trees and other obstructions at their own expense. Grade changes of more than 6” over Alliant Energy’s direct buried cables are not allowed. 401.
SIZING UNDERGROUND FACILITIES Alliant Energy will size underground facilities according to the following A. Conduit ‐ Number of conduits sized to customer's Main Disconnect. See Section 407 B. Transformer Pad ‐ Sized to Customer's Main Disconnect. C. Underground Conductors ‐ Sized to Customer's Load and to meet all Voltage Drop and flicker requirements. D. Transformer ‐ Sized to Customer's Load. E. Instrument Transformer or Termination Cabinets ‐ Sized to Customer’s Main Disconnect. 402. LOCATION OF ALLIANT ENERGY CABLES A. Buildings and Pools Alliant Energy’s cables (primary and secondary) shall not be located under buildings or pools. Inform Alliant Energy of plans for future buildings, pools etc. B. Sidewalks, Hard Surfaced Parking Lots, Driveways, Patios and Decks 1. With approval from Alliant Energy, buried cables may be installed in conduit through these areas, if no other acceptable route exists.* 2. *Exception: Cable runs crossing under sidewalks at 90° may not be required to be installed in conduit, unless there are other circumstances which would require conduit. 3. With approval from Alliant Energy, a hard surface may be installed over the existing direct buried cable, provided a conduit with capped ends and tracer/pull wire(s), is/are installed 18‐24 inches away and parallel to the existing cable, at a 24 to 36 inch depth. 4. Conduit, if required, is to be installed by the Customer, or at the Customer’s expense. Services under concrete add conduit to 3 feet beyond edge. Typical Underground Single Phase 120/240 Volt Residential Metering Guidelines
Standard Meter Sockets
200-300 amp
Meter Socket
(Front View)
200-300 amp
Pedestal Type Meter
Socket
(Side View)
Customer wire
landing lugs
Wall
200-300 amp
Pedestal Type Meter
Socket
(Front View)
Alliant wire
landing lugs
200-300 amp
Meter Socket
(Side View)
Upper lugs for
WP&L connection
5
2
3
8
Common neutral
lugs
2
Neutral bus
8
Wall
Pedestal Meter Sockets
Lower lugs for
customer
connection
Neutral bus
4
Customer wires
Ground wire
from neutral bus in
Main Disconnect
(Not allowed inside
meter socket)
See Chapter 4 of
Electric Service
Rules
Final Grade
5
18"
6'
Min.
18"
Recommended
1
100-300 Amp
Main
Disconnect
4
Ground rods as required
(Ground wire and clamps
must remain visible until
service is dug in.)
Foundation
Alliant wires
6'
Min.
Utility furnishes, installs, and maintains
1. Underground service cable
2. Meter
9
18"
Recommended
4. Grounding in accordance with the NEC.
(Refer to Chapter 4 Electric Service Rules)
5. Concrete sleeve (encased in concrete)
NOTE: All underground services 200 amp or
less require a 200 amp meter socket.
6
8
Ground rods as
required
(Ground wire and
clamps must remain
visible until service
wire is dug in.)
1
See Electric Service Equipment Book
for approved meter sockets
All residential electric
installations must be
inspected and approved by
authority having jurisdiction
Contact your City, Village or
Township
3
100-300 Amp
Main
Disconnect
6'
Min.
2- 8' ground rods
Do not install in
front of meter
socket
18"
See Electric Service Rules Manual
for additional information
Customer furnishes, installs,
and maintains
3. Approved meter pedestal
LB
Fitting
7
Final Grade
6'
Min.
1
All grounding must
conform to NEC
250.52
Customer wires
9
Ground wire
from neutral bus in
Main Disconnect
(Not allowed inside
meter socket)
See Chapter 4 of
Electric Service
Rules
4-5'
3-4'
Customer wires
All grounding must
conform to NEC
250.52
Customer neutral
to neutral bus
in main disconnect
1
Utility furnishes, installs, and maintains
1. Underground service cable
2. Meter
Customer furnishes, installs, and maintains
3. Customer service entrance panel
4. Rigid conduit (Schedule 80 PVC electrical;
Galvanized steel or Intermediate metal
conduit (IMC)) 2½” for 200A 3" for 300A
5. Approved meter socket
6. Concrete sleeve (only required if conduit
passes through concrete
7. Conduit expansion joint (optional) Required
where horizontal conduit runs are installed.
8. Conduit insulating bushing
9. Conduit straps
10. Grounding in accordance with the code
(refer to Chapter 4 Electric Service Rules)
Page 1 of 2
This information is only a supplement to the Electric Service Rules, The Electric Service Equipment and National Electric Code books.
For complete information about meter sockets and installation go to: www.alliantenergy.com
>utility services>for contractors and trade allies>utility service information>service information manuals>Electric Service Rules & Electric Service Equipment
1phreshandout
Rev.12/17/2013
rmartingilio
Typical Single Phase 120/240 Volt Residential Metering Guidelines
Customer
Service
Entrance
Grounds
(Leave ground wire and top 2" of
ground rods exposed until service
lateral is dug in)
A
Meter
Socket
lli
an
tS
er
Cable route must be with-in 6" of final
grade and a 10' wide clear path before
Alliant Energy will schedule installation
DO NOT
Build over or encase meter socket or service lateral with
a patio, deck or any other structure without contacting
your Alliant Energy Representative first.
vi
ce
La
te
ra
l
Alliant Energy
Pole,Pedestal or
Pad -mount Transformer
UNDERGROUND SECONDARY SERVICE
400. GENERAL
402. LOCATION OF ALLIANT ENERGY SECONDARY VOLTAGE CABLES
A.
B.
C.
D.
E.
F.
G.
The underground service lateral is defined as Alliant Energy’s underground service
conductors from the last pole, pedestal, transformer or other Alliant Energy structure,
connecting to the Customer’s metering point, termination equipment or disconnecting
device. Alliant Energy will install, own and maintain the underground service laterals in
accordance with Alliant Energy’s applicable tariffs and extension rules.
Alliant Energy will not terminate service lateral conductors inside the Customer’s building
or in Customer owned switchgear. The termination point shall be outside the Customer’s
building in either free standing or wall mounted equipment, (self contained meters, CT
cabinets, or a termination box. Alliant Energy will not terminate on a customer’s circuit
breaker.
The Customer shall make application to Alliant Energy for underground service and
obtain approval for the service location, before installing service entrance
equipment. The Customer shall install, own and maintain all service entrance facilities
other than the service lateral, meters, instrument transformers, and instrument
transformer wiring.
All underground service cables shall be protected from physical damage. See
RigidConduit in Section 407. NEC 230.49-50 & NEC 300.5.
All equipment utilized for the termination of Alliant Energy service conductors shall have
provisions which include landing pads and set screw connectors.
Alliant Energy will install a service lateral when the proposed cable route is clear of all
obstructions and within 6 inches of final grade. The Customer shall clear a 10 foot wide
cable route of trees and other obstructions at their own expense.
Grade changes of more than 6 inches over Alliant Energy’s direct buried cables are not
allowed.
401. SIZING UNDERGROUND FACILITIES
Alliant Energy will size underground facilities according to the following:
A. Conduit – Number of conduits sized to customer’s main disconnect.
B. Transformer Pad – NA
C. Underground Conductors – Sized to customer’s load and to meet all voltage drop and
flicker requirements.
D. Transformer – Sized to customer’s load.
A.
B.
C.
Buildings and Pools
Alliant Energy’s cables shall not be located under buildings or pools. Inform Alliant Energy of
plans for future buildings, pools, etc.
Sidewalks, Hard Surfaced Parking Lots, Driveways, Patios and Decks
1. With approval from Alliant Energy, buried cables may be installed in conduit though these
areas, if no other acceptable route exists.*
2. *Exception: Cable runs crossing under sidewalks at 90 degrees may not be required to be
installed in conduit, unless there are other circumstances which would require conduit.
3. With approval from Alliant Energy, a hard surface may be installed over the existing direct
buried cable, provided a conduit with capped ends and tracer/pull wire(s) is/are installed 18
to 24" away and parallel to the existing cable, at a 24 to 36" depth.
4. Conduit, if required, is to be installed by the Customer, or at the Customer’s expense.
Compliance
Whenever a direct buried cable installation is found to be out of compliance with any of the
stated requirements, or in violation of local, state or national codes, the Customer’s
equipment and /or company’s facilities will be modified, at the customer’s expense, to bring
the installation into compliance.
403. UNDERGROUND SERVICE INSTALLATIONS
A.
B.
C.
Service 300 Amps or Less
Alliant Energy will provide trench and cable for all underground services 300 amps or less.
An expansion joint is not required with a vertical conduit run from the meter socket to a depth
of 18". When a horizontal conduit run, such as referred to in 402(B) is required, an expansion
joint is required.
Service Greater than 300 Amps
(See Electric Service Rules Book or contact your Alliant Energy Representative)
The Customer’s service installation shall fully comply with all requirements of the
National Electric Code and those of Alliant Energy.
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THREE PHASE TRANSFORMER PAD/METERING GUIDELINES
3 Phase Secondary Metering Specification 400A-3000A Single Meter
All metering equipment will be installed outdoors
C.T. Cabinet
See Chapter 2 of
Electric Service Equipment Book
3' min
Combustible Wall
CLEARANCES
See Chapter 3 ESR 2013 for
additional information Contact Alliant
Energy for pad orientation and
location.
4' Clear working
space in front of
all metering
equipment
Bonding
Conductor
CL
10' min.
Mount socket
5' (+/- 3")
above grade
Transformer Pad
Top View
Meter Socket
25' Max.
G
F
(max)
FRONT
Sleeve
(if encased in
concrete or
asphalt)
C
5" Primary Conduits
Contact Engineering for Orientation
Grounding
(see Section 440-441)
Bonding
(see Section 442-445)
in Chapter 4 ESR 2013
Grounding
Electrode
Multi-meter &
Pad Mounted
Installations
See Chapter 4
ESR 2013
CONTRACTORS
It is your responsibility to read and understand all
specifications in the 2013 Electric Service Rules Book and
the 2013 Electric Service Equipment Book or at
www.alliantenergy.com. that are required by Alliant Energy.
All 3 phase metering equipment will be approved by
Alliant Energy prior to installation.
Send your proposed metering diagram with manufacturer
name and catalog numbers to your Alliant Energy Engineering
Technician/Field Engineering Specialist prior to ordering any
material for approval.
24" min
Secondary Conduits
PAD DIMENSIONS
See Chapter 4 ESR 2013
10' Clear Space
Typical Installation
(2) 36" or 48", Schedule 40,
5" PVC 90 degree sweeps,
3 to 4 feet below grade, extending 3' min.
beyond pad. (Plug and mark both ends)
Cabinet
Bonding
Conductor
& Conn.
Point
24"-30"
400-1000A
20"-24"
12003000A
OPEN
SPACE
13"
Notes:
N
6" Min.
39" Min.
E
1"Galv.
Grade
D
A
Neutral
Bus
Insulating Bushing
Conduit Strap
Rigid Conduit
Expansion Sleeve(s)
B
Service Disconnect
Outside Wall
Non- combustible Wall
SECONDARY CONDUIT SPECIFICATIONS
Alliant Energy Engineering will specify which pad is correct for your installation
120/208v 277/480v
A
B
C
D
E
F
G
PAD
THICKNESS
PAD I
100-1200
AMP
100-600
AMP
84"
96"
10"
55"
13"
31"
22"
6"
PAD II
1600-3000
AMP
800-3000
AMP
105"
108"
14"
60"
17"
34"
27"
8"
1. All conduits shall enter through the window opening provided in the pad foundation and
shall be cut off so the top of the conduit is flush with the surface of the pad.
2. All metallic conduits (if installed) shall be fitted with an insulating bushing.
3. When an oil sump is required, excavate 18" under, and around pad and fill with coarse
crushed rock - check with local building code to determine if required.
4. Concrete mix shall have a minimum strength of 4000 lb./sq.in. after 28 days.
5. The top of the pad shall be level and all edges and corners rounded off.
6. The pad shall be reinforced with #4 wire, 4" x 4" welded mesh or equivalent materials
with additional 3/8 reinforcing rods around the cable opening. The mesh shall not be less
than 1" from the edges and opening, and 3" below the surface. If the #4 wire, 4" x 4"
mesh is not available, 2 layers of #10 wire, 6" x 6" mesh, horizontally staggered, may be
substituted.
# of
Conduits
Conduit
Size
Min. Bend
Radius
(steel)
Min. Bend
Radius
(pvc)
400
2
4"
16"
30"
600
2
4"
16"
30"
800
3
4"
16"
30"
1200
5
4"
16"
30"
1600
4
5"
24"
36"
2000
5
5"
24"
36"
2500
7
5"
24"
36"
3000
8
5"
24"
36"
Main Disc.
Amperes
Riser Material will be:
Schd. 80 PVC (electric rated); Galv. Steel or IMC
See Chapter 4 ESR 2013 for complete specifications
12/17/2013
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