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IEEE 848-2015 pdf free

IEEE 848-2015 pdf free.IEEE Standard Procedure for the Determination of the Ampacity Derating Factor for Fire-Protected Cable Systems.
IEEE 848 does not endorse the use of or provide application guidance for the installation of cable penetration tire stops and tire-protective materials. Cable designs are available that can withstand and remain functional during direct exposure to a fire. The user should refer to IEEE Std 634t)4 for the qualification requirements of cable penetration fire stops.
1.2 Purpose
The purpose of ibis standard is to provide a test procedure for use in establishing the ampacily derating fuctor for cables installed in lire-protected conduits, trays, free-air drops, cable penetration fire stops, or electrical scparation wrap systems.
2. Normative references
The following referenced documents arc indispensable for the application of this document (i.e., they must bc understood and used, so each referenced document is cited in text and its relationship to this document is explained). For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies.
TEEFJICEA Standard S-135. Power Cable Ampacities.2’
IEEE Std g35T, IEEE Standard Power Cable Ampacity Tables.
NEMA WCSI/ICEA P-54-440, Ampacitics of Cables Installed in Cable Trays.4
3. Definitions
For the purposes of this document, the following terms and definitions apply. The IEEE Standards Diciionars Online should be consulted for terms not defined in this clause.5
arnpacit correction factor: A numeric value equal to one minus the ampaciry derating factor.
ampacity derafing factor: A numeric value representing the fractional reduction from a base ampacity cable rating. Ampacity derating factors are associated with specific installation conditions not presently addressed in the base ampacity.
cable penetration fire stop: Material, devices, or an assembly of parts providing cable penetrations through fire-rated walls, floors, or floor-ceiling assemblies, while maintaining required fire rating.
cable tray: A raceway utilizing a ladder-type substructure that is usually constructed of steel and may include a solid bottom or channel-type construction.IEEE 848 pdf free download.

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