From St. Thomas Energy Inc.

Commercial: Index

Engineering Information for Developers, Consultants and Contractors

Industrial and Commercial Installations

For industrial commercial installations please download the
Application for Electrical Service and fax the completed form back to St. Thomas Energy Inc. All the installation requirements and standards are summarized in the Transformer and Metering Installation Specification. Please review it carefully. If you have any question call 519 631-5550 ext 247.

• Application for Electrical Service
• Transformer & Metering Installation Specification

Pad Mount Transformer Specifications

• 1PH Padmount PDTX-1 Jan 2006 Rev2
• 3PH Padmount PDTX-3 Jan 2006 Rev2

Pole Mount Transformer Specification

• 1PH Polemount PLTX-1 Jan 2006 Rev1
• 1PH Stepdown SDTX-1 Jan 2006 Rev1

Padmount Transformer Drawings

• 11-120 3PH Transformer 150 to 500KVA Base
• 11-125 3PH Transformer 750 to 2500KVA Base
• 9-30 Pad-mount Transformer Installation Detail
• 9-31 Pad-mount Installation Schematic (less than 1000A service)
• 9-32 Pad-mount Installation Schematic (1000A & higher sum CT)
• 9-33 Pad-mount Installation Schematic (1000A & higher neutral CT)
• 9-35 Pad-mount Transformer Base Installation
• 9-40 Pad-mount Transformer Base Installation
• 9-70 Pad-mount Transformer Underground Service up to 3000 Amps

Polemount Transformer Drawings

• 9-60 Polemount Transformer Overhead Services up to 400 Amps
• 9-65 Polemount Transformer Underground Service up to 400 Amps

Service Entrance Fault Current Calculation Template

• Fault Current Template
• IEEE Gray Book Table 65 - Conductor Impedances

Subdivision Developments

St. Thomas Energy’s procedures and requirements for subdivision developments are summarizes in the Subdivision Installation Procedure Summary which can be downloaded along with the Underground Distribution Specification.

• Subdivision Installation Procedure Summary
• Underground Distribution Specification
• Sample Offer to Connect & Service Schedule