More F Scope 1. Note 1—This performance specification does not cover coated fabrics commonly used in rainwear. Note 2—At present, a bench scale arc test for laboratory use is not available. It is the intent of the committee to continue the search for an acceptable laboratory test based on either an electric arc exposure or an acceptable alternative, which will form the basis of a modification of this specification.
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Brad Kelechava Leave a comment In some workplaces, exposed skin can mean skin exposed to danger. In fact, under certain conditions, the damage can go beyond subcutaneous and even be life threatening.
This is why protective clothing exists. Flames are common hazards to workers, so it is important to wear flame resistant FR clothing when in contact with fire or in an environment where conflagrations are possible.
Similarly, personnel in contact with electrical systems can come face-to-face with electric arcs. These take place as an electric current passes through air when insulation or isolation between electrified conductors becomes insufficient to withstand the supplied voltage.
Electric arcs happen every day, and, even though they are immediate bursts of energy, they can be disastrous. However, arcs can vary in intensity, with some resulting in minor injuries and others causing death.
For workers in contact with electric arcs, arc rated AR clothing is crucial. All clothing with an arc rating is flame resistant, but not all FR clothing has an arc rating.
Therefore, despite frequently being bundled together, these values describe different qualities of garments. Specifically, it identifies performance guidelines to determine the arc rating of fabrics, the flame resistance of fabrics and subassemblies, the mechanical durability of the fabrics and subassemblies, the minimum garment construction and performance guidelines, and the garment labeling guidelines for the completed protective clothing worn by workers exposed to flames and electric arcs.
It contains the following changes from the past version: Testing for dimensional change and colorfastness can now be performed and documented. NFPA wash cycles can now be used for vertical flame testing. This standard was withdrawn in Please note that other standards address safety considerations for electric arcs.
ASTM F1506 Specification / NFPA 70E
More F Knit fabrics shall additionally be tested and adhere accordingly to bursting strength characteristics. Conversely, woven fabrics shall also be tested and adhere accordingly to breaking load, tear resistance, and seam slippage characteristics. This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.