Distributor Bulletins

The Electrical Safety Authority releases Bulletins and Flash Notices periodically to quickly communicate new information to the Electrical Distribution Companies and other electrical distribution industry participants. Bulletins and Flash Notices address Regulatory requirements and other general industry issues. 

We are currently in the process of updating the Distributor Bulletins and Flash Notices to be compliant with the Accessibility for Ontarians with Disabilities Act (AODA).  We are also taking this opportunity to refresh the information to ensure references are up-to-date as well as updating the Bulletin and Flash Notice numbering system (addition of version identification).   

  • Bulletins and Flash Notices marked –v1 are considered AODA compliant and are not materially different then the documentation they’ve replace. 
  • Bulletins and Flash Notices marked –v2 are considered AODA compliant and will contain materially significant changes then the documentation they’ve replace.
  • Until this process is complete some information may be missing from the website. If you are unable to find the information you are looking for, please contact Utility Regulations.


The Electrical Safety Authority produces reports and other documents related to Ontario Regulation 22/04 or other industry issues. These documents will report on ESA’s regulatory activity or provide additional information to the industry from a working group’s endeavours or other research activities.

  Bulletin Number Bulletin Title/Description Download
22-07 DB-07-22-v1 Serious Electrical Incidents – Online Reporting Form Download
22-06 DB-06-22-v1 In-Span Structures and Overhead Unsupported Conductors Download
22-05 DB-05-22-v1 Grounding and Bonding of Meterbases Download
22-04 DB-04-22-v1 Raising of Buildings Download
22-03 DB-03-22-v1 The DDI Process – Clarifications and Changes Download
22-02 DB-02-22-v1 Engineering Practices and Regulation 22/04 - Sections 4 & 5 Download
22-01 DB-01-22-v4 Approved Auditors Download
21-05 DB-05c-21-v1 Audit & DoC Due dates - 2021 Group 3 Download
21-05 DB-05b-21-v1 Audit & DoC Due dates - 2021 Group 2 Download
21-05 DB-05a-21-v1 Audit & DoC Due dates - 2021 Group 1 Download
21-04 DB-04-21-v1 Grounding of Concrete Poles Download
21-03 DB-03-21-v1 Customer Owned High Voltage Letter Download
21-02 DB-02-21-v1 Vault Access Download
21-01 DB-01-21-v1 Equipment Approval — Industry Standards Recognized by ESA Download
20-04 DB-04-20-v1 Inverter Approval Accepted by OESC Download
20-01 DB-01-20-v1 Previous Editions of the Overhead and Underground Standards Download
19-04 DB-04-19-v1 Pad‐mount Equipment Protection & Construction Projects Download
19-03 DFN-03-19-v1 3-Phase, 3-Wire, Solidly-Grounded Wye Customer Services Download
19-02 DB-02-19-v1 Certificate of Approval Requirements Download
19-01 DB-01-19-v1 Unused vs Used Distribution Equipment Download
18-05 DB-05-18-v1 Energized Temporary Distribution Work Download
18-04 DB-04-18-v1 Electrical Work and Service Connections Download
18-02 DB-02-18-v1 Distribution Stations Standard - CAN/CSA-22.3 No. 61936-1 Download
17-07 DB-07-17-v1 LDC/ESA Communications for Code Side Safety Concerns Download
17-04 DB-04-17-v1 Meter Base Mounted Transfer Devices Download
16-08 DB-08-16-v1 OESC - ESA Program for Acceptance of Retrofitted Luminaires Download
16-05 DB-05-16-v3 Connection Authorizations Download
16-02 DB-02-16-v1 Certificate of Deviation – Certified Lists Download
15-11 DB-11-15-v1 Reporting Meter Failures (750V or less) Download
15-07 DB-07-15-v2 “Materially Insignificant” Alterations Download
15-04 DB-04-15-v1 Guy Composite Insulators for use with Phase Conductors Download
15-02 DB-02-15-v2 Marking of Guys Download
15-01 DB-01-15-v2 In-Field Equipment Refurbishment Download
14-05 DB-05-14-v1 Major Equipment Refurbishment Download
14-04 DB-04-14-v1 Installation Methods – Sags and Tension Overhead Conductor Download
14-03 DB-03-14-v1 Installation Methods – Guy Anchors Download
14-02 DB-02-14-v1 Process for Safety Concerns on Joint Use Poles Download
14-01 DB-01-14-v1 Barrier Support Structures and Grounding Requirements Download
13-02 DB-02-13-v1 Metering Standards for C-I installations Download
13-01 DB-01-13-v1 LDC Attachments on 3rd Party Poles Download
12-13 DB-13-12-v1 Distribution System Control Component Setting and O. Reg. 22/04 Requirements Download
12-12 DB-12-12-v1 Introduction of Utility General Inspections (UGI) Download
12-11 DB-11-12-v2 Certificate of Deviation Approval Download
12-10 DB-10-12-v1 Attacher Developed Plans/Work Instructions and LDC Review Download
12-08 DB-08-12-v1 Pole – Soil Tamping Download
12-05 DB-05-12-v1 Distributor Wood Pole(s) Approval Download
11-05 DB-05-11-v1 In-Line Solid Blade Switch Safety Download
10-05 DB-05-10-v1 Distribution Substation & Like-for-Like Download
11-07 DB-07-11-v1 Embedded Generation Safety Download
11-01 DB-01-11-v1 Section 7 – 3.3.2 - Additional Guideline Information Download
07-09 DB-09-07-v1 44-kV Substation Grounding Tests Report Summary Download
07-07 DB-07-07-v1 44-kV Substation Grounding Tests Download