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Ontario OBC - electrical room fire resistance rating

Kevin0616

Registered User
Joined
May 11, 2020
Messages
19
Location
Ottawa
What is the fire resistance rating for the electrical room in Ontario's building code, 1 hour, 1.5 hours, or 2 hours? Thanks,
 

cda

Sawhorse 123
Joined
Oct 19, 2009
Messages
19,310
Location
Basement
What kind of electrical room?

What type of occupancy?

What all electrical equipment is in it?

Fire sprinkler?
 

tmurray

Registered User
Joined
Jun 10, 2011
Messages
1,950
Location
NB, Canada
It depends on what is in it. Typically 1 hour unless you have something very strange like transformers in it.
 

tmurray

Registered User
Joined
Jun 10, 2011
Messages
1,950
Location
NB, Canada
Also, 1.5 hours only exists for things like fire doors and fire dampers. For actual fire separations, it is 0hr, 45min, 1hr, 2hr, 4hr.

0hr sounds like a weird one, but it is intended as a smoke control only. Fire separations are barriers that control the spread of fire and smoke. A fire resistance rating is the time in minutes or hours a particular assembly will resist the passage of flame and is assigned to a fire separation.
 
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