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Description / Abstract:
This is a fire test method for determining the fire performance
response of discrete products (including, but not limited to
electrical, mechanical, and plumbing equipment) intended to be
installed in air handling spaces, such as above suspended ceilings
or below floors. These products are subjected to an open flame
ignition source and evaluated using a product calorimeter.
This test may be used to determine fire performance and smoke
characteristics of discrete, non-continuous building materials
where the Test for Surface Burning Characteristics of Building
Materials, UL 723, is not applicable.
The purpose of this test is to determine the rate of heat
release and the rate of smoke release of the burning product
samples as they relate to the requirements for fire-resistant and
low-smoke-producing characteristics in accordance with the
provisions of the following codes: National Electric Code, NFPA 70;
International Mechanical Code, NFPA 5000; Standard for the
Installation of Air Conditioning and Ventilating Systems, NFPA
90A.
This test method does not provide information on the performance
of products in other fire or test conditions. This test does not
investigate the toxicity of the products of combustion.
This test does not cover the constructional, electrical, or
other performance requirements of the product.
The Codes noted in 1.3 reference the use of UL 2043 for
electrical equipment with combustible outer enclosures.
Specifically, the ²National Electrical Code² and the ²International
Mechanical Code² expressly state that electrical equipment with
metal enclosures shall be permitted. Consequently, UL 2043 is not
intended to apply to electrical equipment with metal outer
enclosures unless otherwise specified by end-product-standard
requirements.