Electric Toolbox

Resources to help you complete your project

 
Electric Service Requirements Manual 


The manual below is provided to help you and your electrical contractor plan your electric service. Requirements are stated to facilitate our mutual understanding of electrical work to be completed, to promote safety and to expedite service connections. When unusual or special situations arise, we will be glad to provide supplementary information. 

   
The manual is based on applicable codes and practices established by Ameren, local authorities and the electrical industry. This includes the National Electric Code and the National Electric Safety Code. If you have any apparent conflict between the manual and the requirements of local inspection authorities or the national codes, you should bring the situation to our attention before proceeding with your electrical work. 
   
Please note that it is your responsibility and that of your electrical contractor to properly select meter and service equipment and to locate and install the appropriate electrical equipment to meet Ameren Corporation’s service requirements.
 Some installations, by virtue of their complexity, require that drawings be submitted to Ameren Corporation to coordinate and specify the work to be done. 
   
Also, please note that having access to the information contained in these manuals does not preclude you or your contractor from contacting Ameren as soon in your planning process as possible and applying for service. 
This allows us to begin processing your request sooner and achieve a greater coordination of effort in connecting your facility to our system. 
 



Electric Underground Specifications 


Residential Manual: 
Specifications for the Installation of Conduit Systems in Residential 


Non-residential Manual: 
Specifications for Customer-installed Underground Distribution Facilities



 

Typical Commercial Overhead Service 
A - Ameren connections 

B - Ameren service cable 

C - Customer-owned and installed weatherhead 

D - Customer-provided point of attachment 

E - Customer-owned and installed mast 
       
 
Customer-Owned and Installed Ground Rod 
   
 

Braced Overhead Service Mast

   
 

Typical Overhead Temporary Electric Service

   
 
Underground Temporary Service 
   
1ph 200a 120-240v overhead service 2inch rigid thru roof closed
  Electric Toolbox Dos 
1ph 200a 120-240v overhead service 2inch rigid thru roof open
  Electric Toolbox Dos 
1ph 200a 120-240v overhead service house knob    Electric Toolbox Dos 
1ph 200a 120-240v meter pole closed    Electric Toolbox Dos
1ph 200a 120-240v underground service at house     Electric Toolbox Dos 
1ph 200a 120-240v underground service/disconnect combo at house   Electric Toolbox Dos 
1ph 320a 120-240v overhead service 3inch rigid thru roof open     Electric Toolbox Dos 
1ph 320a 120-240v overhead service 3inch rigid thru roof closed
  Electric Toolbox Dos 
1ph 320a 120-240v underground service at house
  Electric Toolbox Dos 
1ph 600a 120-240v underground service CT Cabinet closed
  Electric Toolbox Dos 
1ph 600a 120-240v underground service CT Cabinet open   Electric Toolbox Dos 
3ph 200a 480v overhead service cold sequence base closed
  Electric Toolbox Dos 
3ph 200a 480v overhead service cold sequence base open   Electric Toolbox Dos 
3ph 320a 120-208v underground service at bldg closed   Electric Toolbox Dos 
3ph 320a 120-208v underground service at bldg open    Electric Toolbox Dos 
3ph 600a 120-208v ct cabinet at bldg closed   Electric Toolbox Dos 
3ph 600a 120-208v ct cabinet at bldg open   Electric Toolbox Dos 
3ph 1200a 277-480v underground service ct-pt cabinet at steel structure closed   Electric Toolbox Dos 
3ph 1200a 277-480v underground service ct-pt cabinet at steel structure open   Electric Toolbox Dos
3ph 2500a 120-208v underground service ct cabinet at bldg closed   Electric Toolbox Dos 
3ph 2500a 120-208v underground service ct cabinet at bldg open   Electric Toolbox Dos 
 
 
 
Do not leave construction debris in the area. 
   
     

Incorrectly Installed Expansion Sleeve


Please refer to Ameren Electric Service Manual - Figure 700-1A for correct installation. 
   
     
Inadequate Clearances Between the Gas Service and Electric Meter 
The electric meter is classified as an ignition source, and there shall be a minimum of 3 feet of clearance between an ignition source and a gas regulator relief vent.
   


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