building codes

Building Test Codes.

The fire performance requirements of building materials and components are contained in the National Building Code of Canada (NBC) and its amendments. Part 3, Use and Occupancy, divides into various categories such as theaters, hospitals, dwellings, hotels, department stores, etc. Fire resistance requirements of combustible materials are laid down in further sections. The permitted flame spread ratings and smoke developed classifications are tabulated in the code. The categories add complexity to the equation, requiring the more stringent rating.

Flame Test
Test Measurements
Application

FT-1
Test's cable for it's tendency to catch fire and burn on it's own or to propagate a flame.

A cable passes the test if.the cable self-extinguishes 60 seconds after test flame is removed.
In Ontario, cable within a computer room must meet the FT-1 rating as specified in the Ontario Building Code (OBC).

FT-4
Much more severe a test than FT-1. Test's cable for it's tendency to catch fire and contribute to a fire.

A Cable passes the test if the longest char length is less than 1.52 meters after two burns.
In Ontario, all cable outside a computer room must be run in conduit or meet the FT-4 classification. Other provinces accept an FT-4 rated cable for installation in an air plenum. (i.e. Vertical riser shafts.)

FT-6
Test's cable for it's tendency to catch fire and create smoke. Since smoke inhalation is the major cause of death during a fire, the reduction of smoke generation is a prime objective of safety codes.

A cable passes the test if…the longest char length is 1.52 meters; the smoke density is not. 15 at maximum average optical density.
In Ontario, cable in a return air plenum must be run in conduit or meet the FT-6 classification.

What is an Air Plenum?

A return air plenum is the air handling space located between a roof and a drop ceiling. NOTE: CSA fire ratings must be stamped on the cable and be accompanied by a CSA verification sticker attached directly to the spool or box.

*Flame Test*	*Test Measurements*	*Application*
FT-1	Test's cable for it's tendency to catch fire and burn on it's own or to propagate a flame. A cable passes the test if.the cable self-extinguishes 60 seconds after test flame is removed.	In Ontario, cable within a computer room must meet the FT-1 rating as specified in the Ontario Building Code (OBC).
FT-4	Much more severe a test than FT-1. Test's cable for it's tendency to catch fire and contribute to a fire. A Cable passes the test if the longest char length is less than 1.52 meters after two burns.	In Ontario, all cable outside a computer room must be run in conduit or meet the FT-4 classification. Other provinces accept an FT-4 rated cable for installation in an air plenum. (i.e. Vertical riser shafts.)
FT-6	Test's cable for it's tendency to catch fire and create smoke. Since smoke inhalation is the major cause of death during a fire, the reduction of smoke generation is a prime objective of safety codes. A cable passes the test if…the longest char length is 1.52 meters; the smoke density is not. 15 at maximum average optical density.	In Ontario, cable in a return air plenum must be run in conduit or meet the FT-6 classification.