Codes and regulations
Regulatory framework
- The Technical Standards and Safety Act, 2000 is the Ontario statute; TSSA administers it. O. Reg. 212/01 (Gaseous Fuels) adopts CSA B149.1 with Ontario amendments. O. Reg. 211/01 (Propane Storage and Handling) adopts CSA B149.2. Field approval of fuel-related components follows CSA B149.3. Electrical work follows CSA C22.1.
- The hierarchy is statute and regulation, then the adopted code, then the certified appliance manufacturer's instructions. A manufacturer's instruction cannot relax a code minimum; the more stringent requirement governs, and the authority having jurisdiction decides conflicts.
- Appliances must be certified for the gas and application, with a recognised certification mark. Modifying a certified appliance can void certification; fuel-related changes may require field approval under B149.3.
- Only a TSSA-registered gas contractor may contract for gas work. The technician's certificate class limits the work: G3, G2 and G1 have defined scopes. G1 is the unrestricted class for appliance input and pressure and carries supervisory responsibility; lower classes must stay within their defined scope and supervision rules. Carry the certificate and work within scope.
Permits, notification and tags
- Obtain permission before installing or altering; notify TSSA for inspection where required. Keep manuals, start-up records and test results.
- If an appliance is unsafe, follow the tagging procedure: shut off gas, attach the appropriate warning tag, record the defect, and notify the owner and contractor. Do not leave an unsafe appliance operating because the customer insists.
Worked example: a restaurant owner buys a used commercial fryer with an unlisted burner and asks for connection. The appliance has no certification mark and the burner has been drilled. The correct response is not to connect it. B149.1 requires a certified appliance; a field-approved alteration under B149.3 would need an approved agency and AHJ acceptance, and the original certification is no longer valid. Document and advise.
Traps: assuming manufacturer's instructions always override the code; thinking a permit is only for new buildings; letting a G2 supervise outside its authority; using B149.2 for natural gas; assuming a certification mark covers a field modification.