IEEE Std 45.8 pdf download

IEEE Std 45.8 pdf download IEEE Recommended Practice for Electrical Installations on Shipboard— Cable Systems
3. Definitions
For the purposes of this document，the following terms and definitions apply. The IEEE StandardsDictionary Online should be consulted for terms not defined in this clause.2
accommodation spaces: Spaces provided for passengers and crew members that are used for berthing.dining rooms, mess spaces, offices, private baths, toilets and showers, lounges, and similar spaces.
adjustable speed drive (variable frequency drive): A converter using solid state switching devices thathas the capability of adjusting the frequency and voltage of the output waveform to provide speed andtorque control of motors.
communication and electronics circuits: Electrical circuits supplying equipment and systems for voice,sound，or data transmission，such as telephone,engine order telegraph，data communication，interiorcommunication，paging systems，wired music systems，fire and general alarm systems，smoke and firedetection systems, closed circuit television,navigational equipment, and microprocessor-based automatedalarm and control systems.
deluge: A condition where equipment is exposed to an abnormal volume of water during extreme weather,testing, maintenance, or fire suppression.
double banked: The arrangement of cables in a cable tray or raceway wherein the cables are stacked intwo layers.
feeder: A cable or set of conductors that originates at a main distribution center (main switchboard) andsupplying secondary distribution centers,transformers, or motor control centers. (Bus tie circuits betweengenerator and distribution switchboards，including those between main and emergency switchboards,arenot considered as feeders.)
hydrocarbon pool fire: A fire that occurs when a flammable liquid leaks from a vessel or pipeline to forma fluid reservoir, which then ignites.
intrinsically safe circuit: A circuit in which any spark or thermal effect is incapable of causing ignition ofa mixture of flammable or combustible material in air under prescribed test conditions.
lug: A wire connector device to which the electrical conductor is attached by mechanical pressure orsolder.
machinery spaces: Spaces that are primarily used for machinery of any type, or equipment for the controlof such machinery, such as boiler, engine, generator,motor, pump, and evaporator rooms.
multicable penetrator (multicable transit MCT): A device consisting of multiple nonmetallic cable sealsassembled in a surrounding metal frame,for insertion in openings in decks， bulkheads，or equipmentenclosures and through which cables may be passed to penetrate decks or bulkheads or to enter equipmentwithout impairing their original fire or watertight integrity.
NRTL: A nationally recognized testing laboratory as recognized by the U.S. Occupational，Safety, andHealth Administration (OSHA) or the Authority Having Jurisdiction.
single banked:The arrangement of cables in a cable tray or raceway wherein the cables are installed in asingle layer with a spacing of less than one cable diameter.
switchboard: A metal-enclosed panel or assembly of panels that may contain molded case,insulated caseor power circuit breakers, bolted pressure contact or fusible switches, protective devices,and instruments.These devices may be mounted on the face or the back of the assembly.Switchboards are generallyaccessible from the rear as well as from the front; however, they can be front accessible only.
triplex cable assembly: A cable assembly composed of three insulated single conductor cables twistedtogether.
variable frequency drive (VFD): A converter using solid state switching devices that has the capability ofadjusting the frequency and voltage of the output waveform to provide speed and torque control of motors.Syn: adjustable speed drive.
vital services: Services normally considered to be essential for the safety of the ship and its passengers andcrew. These usually include propulsion，steering,navigation，firefighting, emergency power,emergencylighting, electronics, and communications functions.
4.Cable types
Cables for installation on shipboard shall be listed as marine shipboard cable, Navy cable, or other cable asdescribed in this clause.
Various cable constructions are detailed in IEEE Std 1580, permitting a selection of conductor insulationtypes，jacket types，armor，and ampacities. Cable constructions intended for specific applications anddifferent voltages are also included. The application of cach respective type is defined in the followingparagraphs of this subclause.
4.1 Marine shipboard cable
Marine shipboard cables shall be listed as Marine Shipboard Cable by a Nationally Recognized TestingLaboratory(NRTL).These cables should meet the performance and construction requirements of IEEE Std1580, UL1309, or CSA 22.2 No.245.
4.1.1 Power cables
4.1.1.1 Low-voltage cables (6oo v to 2000 v)
These cables should be used for the distribution of power up to their voltage rating throughout the system,and they may be used in lighting, communication, control, and electronic circuits as desired.
4.1.1.2 Medium-voltage cables (2001 v to 3500o v)
These cables should be used for the distribution of power up to their voltage rating.Distribution cablesrated 2001v and above shall be shielded.
4.1.1.3 Variable frequency drive (VFD) cables
These cables should be used for AC adjustable speed drives (ASD).In the absence of drive manufacturer’srecommendations, refer to IEEE Std 1580 for specific cable construction.