ASTM E1725-19 Standard Test Methods for Fire Tests of Fire-Resistive Barrier Systems for Electrical System Components

ASTM E1725-19 Standard Test Methods for Fire Tests of Fire-Resistive Barrier Systems for Electrical System Components

ASTM E1725-19 contains fire-test-response test methods to evaluate the ability of a fire-resistive barrier system to inhibit thermal transmission to the electrical system component within. The test is carried out under specified test conditions. ASTM E1725-14 test method measures the transmission of heat to the electrical system components within the barrier system.

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    Scope:

    ASTM E1725-19 test method covers fire-test-response that provides the information on the temperatures recorded on the electrical system component within a fire-resistive barrier system during the period of exposure.

    Test Procedure:

    In ASTM E1725-19, the average air temperature inside the fire-resistive barrier system at the beginning of the test is not less than 50°F (10°C). Test equipment and test assembly undergoing the fire test from any condition of wind or weather that might lead to abnormal results need to be protected. In the fire test method after the first 10 min, the furnace pressure is controlled so as to position the neutral pressure plane. The test is continued till the desired evaluation period is reached, the conditions of performance are satisfied, or failure occurs. Temperatures and furnace pressures are measured and reported at intervals not exceeding 1 min.

    Test Specimen:

    A construction consisting of electrical system components and a fire-resistive barrier system are tested using ASTM E1725-19. 

    Data:

    A function of thermal conductivity, density and specific heat, ρkC is calculated in ASTM E1725-19

    Where:

     k = the material’s thermal conductivity,

    ρ = density, and

    C = specific heat.

    Conclusion:

    ASTM E1725-19 provides details about the fire-test-response that provides the information on the temperatures recorded on the electrical system component within a fire-resistive barrier system during the period of exposure.

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