BILD Calgary Region

Bulletin 2022 – 02

From:Tom Strangward, Senior Coordinator, Technical & Standing Committees
Date:January 12, 2022
Subject:ENMAX Power Corporation – Safety Hazard – Use of multiple temporary heaters during construction of Multi-Family housing

THIS ‘TECHNICAL BULLETIN’ MESSAGE IS FORWARDED TO BILD CALGARY REGION MEMBERSHIP AT THE REQUEST OF THE CITY OF CALGARY BUILDING SERVICES AND ENMAX.

ENMAX Power Corporation (EPC) has identified a severe safety hazard being caused by use of multiple temporary heaters during construction of multi-family housing causing severe overloading of the transformer.

Overloading the transformer causes extreme heat to develop on the outside of the infrastructure presenting a severe safety hazard for injury and fire.  Overloading a transformer causes irreparable damage resulting in unplanned outages, delay to construction schedules and additional costs to replace the unit.

EPC is asking all BILD members (developers, home builders, construction managers and crews) to monitor the number of temporary heaters operating at one time during construction of multi-family housing.  Each situation is unique and dependent on several factors, and EPC suspects between potentially 1-3 temporary electric heaters (6kW to 9kW each) may be allowable, but an assessment is required prior to connecting more than one 9kW heater at a time.

EPC asks members contact getconnected@enmax.com to confirm how many temporary electric heaters can safely be used at one time in your specific scenario.

Any further questions or concerns can be directed to Brandy Eagleson at beagleson@enmax.com.

For a presentation prepared by EPC on this issue, click here.