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NYC Mechanical Code

§ 503.2 — § 503.2

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What is NYC MC § 503.2?

Quick Answer

This section outlines the requirements for fans in environments with explosive or flammable materials. It mandates the use of nonferrous or nonsparking materials for fans and their casings, and specifies that fans handling clogging materials must be of a certain type. Applies to building owners operating in hazardous environments.

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

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503.2 Fans.

MC § 503.2

Parts of fans in contact with explosive or flammable vapors, fumes or dusts shall be of nonferrous or nonsparking materials, or their casing shall be lined or constructed of such material. Where the size and hardness of materials passing through a fan are capable of producing a spark, both the fan and the casing shall be of nonsparking materials. Where fans are required to be spark resistant, their bearings shall not be within the airstream, and all parts of the fan shall be grounded. Fans in systems-handling materials that are capable of clogging the blades, and fans in buffing or woodworking exhaust systems, shall be of the radial-blade or tube-axial type.

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