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What is NYC MC § 502.9.4?

Quick Answer

This section prohibits the use of squirrel cage blowers for exhausting hazardous fumes, vapors, or gases in buildings involved in explosives operations. It mandates the use of nonferrous fan blades within ductwork and requires motors to be located outside the ducts. Applies to operators of facilities handling explosives.

General informational summary. Not legal advice for your situation. Consult an attorney before acting on any specific matter.

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502.9.4 Explosives.

MC § 502.9.4

Squirrel cage blowers shall not be used for exhausting hazardous fumes, vapors or gases in operating buildings and rooms for the manufacture, assembly or testing of explosives. Only nonferrous fan blades shall be used for fans located within the ductwork and through which hazardous materials are exhausted. Motors shall be located outside the duct.

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