IEEE 1185:2019 pdf free download – IEEE Recommended Practice for Cable Installation in Generating Stations and lndustrial Facilities
1.1 Scope
This recommended practice provides guidance for wire and cable installation practices in generating stationsand industrial facilities. It covers installation of cable in trays, conduit, duct banks,wire ways, gutters, andother raceway systems. It covers medium voltage power cable,low voltage power cable,control cable,instrumentation cable,coax/triax cable,fiber optic cable,data communications cable, and other specialtycables used in power plant and industrial environments. This document may also be of benefit for the properinstallation of wire and cable systems in commercial, governmental, and public facilities when the same orsimilar wire or cable types and raceways are used.
1.2 Purpose
The purpose of this recommended practice is to provide guidance on how to help prevent installation damage,which is the single greatest cause of wire and cable failures.Cable failures can lead to power outages andequipment downtime,resulting in inconvenience at best,lost production, or worse, a safety issue. Thisdocument provides information for engineers,technicians, and trades/crafts people to avoid potential wireor cable damage during installation, testing, and modification of cable systems at generating stations andindustrial facilities.
1.3 Units of measure
The requirement to show metric units first and, if desired,English units second in parentheses after the metricunits is dictated by IEEE Policy 9.18, and has been implemented in this document even though the customarypractice when installing American Wire Gauge(AWG) wire and cable is to use the English units. The user ofthis document may choose to use the English units, since cables made to AWG sizes are typically installedusing English units of measure, even though the metric units are shown first and English units second inparentheses.Conformance to this recommended practice can be achieved using either metric or English unitsprovided the user is consistent when selecting and applying the units. The user is strongly cautioned not tomix units as mixing units can and will result in installation issues.The user is encouraged to select units thatare most familiar to the installers so as to reduce the potential for creating installation problems that could goundetected until wire and cable failures occur, which is often years after installation. It should also be notedthat due to the reversal of the order of metric and English units, an attempt was made to keep the significant figures of the metric and English units comparable.However, due the application of rounding principles, themathematical conversion from English to metric and metric to English may not be exact.
The user is also cautioned to recognize the difference between force and mass especially within the Englishsystem of units since term “pound” (1lb) has been often misapplied, which can result in errors in the applicationof the equations.Attempts have been made within this document to be clear in the terminology to avoidconfusion and misapplication of this concept in both the metric and English units. It should also be notedthat cable manufacturers give cable weights in Sl units using “kg/m” whereas in English the information isprovided in terms of “1b/ft”.The metric units are clearly mass per unit length whereas the English units aremore ambiguous. In this context, cable weight in English units (1b/ft) is a weight per unit length. A pound(force) is equal to pound (mass) on the surface of the Earth, and thus is not multiplied by the gravity constant”g”.For clarity, equations using cable weight have often been shown as two equations, one for metric and theother for English. Since the metric equation uses cable weight in terms of mass per unit length, the accelerationdue to gravity constant “g” has been added to the metric equation as applicable, which does not appear in theEnglish equation.