IEEE 690-2018 pdf free download – IEEE Standard for Design and Installation of Cable Systems for Class 1E Circuits in Nuclear Power Generating Stations.
3. Definitions
For the purposes of this decument. the following Icons and definitions apply. The iEEE Srtotviont’.s Dtcrio.tars (ktiinr should he consulted for tenns not defined in Lhts clause’
associated circuits Non-class I E circuits that are not physically separated or are not electrically isolated from (‘lana IE ctrcuits by acceptable separation distance, safety class structures, harriers., or isolation desices
“IOTF—Circuits include the intercommocleug cabling ausi the connected kind
cable shieldIng A magnetic or nonmagnctic, conductive material applied over the insulated conductor or conductors to confine the electric fIeld ol the cable to the insulated conductor or conductors or to protect the int.ttlatcd conductors from extcntal electromagnetic or electrostatic interference.
cocoon Icablr sWeat enclosure) Acable wrap or enclosure mated to ptolecr cables (toni flue haranis and used to permtt cable separation distances less than that normally required and which is typically made of a fireresistant nnatenal,
control cables CoatmI cabin are applied at relatively low-current levels or used for intermittent operation to change the open-tung status of a control des ice of pLant sysretn.
design basis events: Postulated events used tn the design ttt establish the acceptable performance requirements of the Structures, systems., and cotttponents.
tnalruntrntatLou and speciatt’, caNes. lmsstrunsentation and specialty cables ate used for tratsstnttttmsg variable current or voltage signals (analog) or those used for lxanssrtitting ccwied infomamtion tdigital For the purposes of this standard, specialty cables are types such as uherrnocosçle, coaxial, triaxial. twin axial, fiber-optic, telephone. and data consntuntaruuns.
lmtss.soltagr power cables: low-voltage power cables are designed to supply power to devices of plant systems rated 2000 V or less
tnrdlum-soltagr possrr cables: Mcdiuni-soltage power cables are designed to supply posse. to devices of plant systems rated 2001 Vto 15000 V.
4. Cable, field splice, and connection qualification
4.1 General
Thisclauseesiahlishes qualiflcatnt requircnscnts that shall beutilized in specifyingcaNes, field splices, and connections of cable systems for Class I E circuits.
4.2 Requirements
The follossin requirement’s are to be uatlta-d for cable, field splice, and connection qualifications:
a) Cables, field splices, and connections shall have a qualifed life for all service conditions that are postulated for the areas where they are to be used and shall be qualified in accordance with the applicable parts ofIEC/IEEE 60780-323, IEEE Std 383, and IEEE Std572.
b) All cables (including fiber optic cables) shall pass the vertical tray flame test described in IEEE Std 1202TM [B17], or NFPA 262, except that switchboard wires, coaxial, twin axial and triaxial cables shall, as a minimum, pass the UL VW- 1 flame test (UL 1581). In addition, all low-voltage conductors going into a multiconductor cable shall pass the UL VW-1 flame test. 14
c) For analog control systerms, the requirements may be different from newer digital control systerms. Cables and shielding for digital systems, whether for control or instrumentation, should be treated the same.
5. Conductor sizing
This clause establishes cable conductor sizing requirements for various types of cable installations for Class 1E circuits. Power cables shall be sized in accordance with National Electrical Code’ (NEC”) (NFPA 70%), IEEE Std 835, or NEMA WC 51/ICEA P-54-440. The ampacity tables provided in these documents are very specifc to the cable installation method. It is important to understand the bases for the ampacities provided in their tables so that the appropriate sclection is made based on the cable installation (e.g., random fll, non- spaced versus single-layer for open top trays). Additional guidance for cable ampacity determination relating to maintained spacing and conduit grouping factors can be found in IEEE Std S-135-1.IEEE 690 pdf download.