IDENTIFYING TRAY CABLES FOR YOUR NEXT INSTALLATION
A WHITE PAPERIDENTIFYINGTRAY CABLES FORYOUR NEXT INSTALLATIONPublished 3/23/2012
Though rapidly increasing inpopularity, tray cables are still a pointof confusion for many. While theterm “tray cable” is being heard everywhere,many do not understand what exactly a traycable is or the benefits of using tray cables.Another gray area for many comes fromthe variety of types of tray cable, what eachmeans and in which applications each typeshould be used. This paper will:2 Define what a tray cable is Describe the different types of tray cables Provide uses and standards for each type oftray cableIt will also provide a reference guideregarding the applications and governing standards for each tray cables type.WHAT ARE TRAY CABLES?As the name implies, tray cables are cablesthat can be used in many different typesof cable tray systems, ranging from fixedwiring within buildings to hazardouslocations and factory floors. According tothe National Electrical Code (NEC) Article392, there are many different varieties ofcable trays, including ladder, ventilatedtrough, ventilated channel and solid bottomTURCK Inc. 3000 Campus Drive Minneapolis, MN 55441-2656Phone: 763-553-7300 Application Support: 1-800-544-7769 Fax: 763-553-0708 www.turck.com
trays among others. There are also otherpermitted uses which include raceways,such as aerial cables on a messenger,under raised floors in rooms containingindustrial process control equipment andrack rooms. Tray cables are built to be flameretardant, offer safety and code compliance,and demonstrate adequate mechanicalstrength. Due to their many benefits, traycables are becoming more frequently usedin applications such as control rooms, tankfarms, and in hazardous factory processapplications.If the cables pass stringent crush andimpact tests they can carry the ExposedRun listing (ER), and may be used exposed when supported and protected.The National Electrical Code (NEC) hasindividual articles that define specificuses and installation practices. The articles reference cable types as definedby UL standards. NFPA 79, the NationalFire Protection Association “ElectricalStandard for Industrial Machinery” alsoestablishes best practices for cabling onindustrial machinery and often allows orrequires use of tray cables. These serve asuniversal guidelines for the installationand best practices for using tray cables.TYPES OF TRAY CABLES600V Power and Control Tray CableCables that are identified as Type TC aredefined by UL 1277, and their use is governedby NEC Articles 336. Type TC (tray cables)are generally employed for power, lighting,control and signal circuits and are mostcommonly used on industrial machinery. Asdictated by UL 1277 definition, the smallestAmerican Wire Gauge (AWG) size allowedis 18AWG. All cables that are UL 1277 listedmust first pass the UL 1685 Vertical FlameTest or the FT4/IEEE1202 flame test. Theseare stringent flame tests, applying 70,000BTU’s from a 10” ribbon burner applied tocable in a vertical chamber for 20 minutes.The individual conductors inside the cablemust also be UL listed to UL 44, UL 66 or UL83, which is unique to 600V cables. The mostcommon insulations include PVC, PVC with anylon overcoat or XLPE. Both thermoplasticand thermoset outerjacket materials areallowed.The insulation and jacket materialsboth determine the temperature listingsof the cables. The most common jacketmaterials are PVC or TPE, which are thermoplastics. CPE and Neoprene rubberscan also be used. The highest ratingavailable for thermoplastics and rubberis 90C Wet and 90C Dry. If the particularmaterials do not meet the requirementsUL-UnderwritersLaboratoriesThe UL, or UnderwritersLaboratories Inc., is anindependent productsafety certificationorganization withfive main areas offocus: product safety,environment, life andhealth, verificationservices, and knowledgeservices. UL primarilydevelops standardizedtest procedures andstandards for productsand materials with itsmain concentration onproduct safety. The ULwas founded in 1894and is approved toprovide testing standardsby the OccupationalSafety and HealthAdministration (OSHA).of 90C Wet and Dry, 75C Wet and Dry or60C Wet and Dry approvals are possible.When these cables are used in environments with temperatures that exceed90C, fluoropolymer jackets can be usedwhich are allowed at 125C, 150C, or200C. At the other end of the spectrum,Type TC cables may only be marked witha -40C cold temperature if they pass a-40C cold impact test.Cables that are listed TC-ER pass stringent crush and impact tests, allowingthem to be used in “Exposed Runs” whenthe rules of installation in NEC 336.10(7)and/or NFPA 79 are followed. Cables donot have to be installed in trays as longas they are mechanically protected withstruts, angles or channels every 1.8m (6’).TURCK Inc. 3000 Campus Drive Minneapolis, MN 55441-2656Phone: 763-553-7300 Application Support: 1-800-544-7769 Fax: 763-553-0708 www.turck.com3
NEC- NationalElectric CodeThe National ElectricCode (also referredto as NFPA 70) is astandard ensuring thesafe installation ofelectrical wiring andequipment. The NECprovides a standardizedsingular source to lookfor requirements for safeelectrical installations.The NEC addresses theinstallation of electricalconductors, raceways,and equipment, signalingand communicationconductors among manyothers. The NEC is notconsidered a law in theUnited States, thoughit is often mandated bylocal or state laws. TheNEC was developed and iscontinually refined by theNational Fire ProtectionAssociation (NFPA),was first published in1897, and is updatedevery three years.Industrial machinery often provides this sure to oil, used outdoors or exposed toprotection, making TC-ER cables a cost UV. Cables used for direct burial musteffective choice. TC-ER listed cables also have the wording “direct burial” includedpass UL 1569 without the costly metalarmor many cables need, providing increased flexibility and reduced costs.As with all types and voltages of traycables, the environment in which theywill be used must be considered. Eachstandard defines tests which cablesmust pass if they are approved for expo-4in the legend of the cable jackets.300V Power Limited Tray CablesType PLTC (Power Limited Tray Cables) cablesare defined by UL 13 and governed by NECArticle 725. PLTC cables are built to stringent300V requirements for Class 1, Class 2 andClass 3 remote control, signaling, and powerlimited circuits. NFPA 79 also permits use ofthese listed cables on industrial equipment.TURCK Inc. 3000 Campus Drive Minneapolis, MN 55441-2656Phone: 763-553-7300 Application Support: 1-800-544-7769 Fax: 763-553-0708 www.turck.com
Type PLTC cables range in size from12 to 22 AWG. Insulation types includePVC, SRPVC, PE’s, TPE, some rubbers andfluoropolymers.Uniquely, this stan-dard allows the use of foamed insulations which may be required for specificelectrical performance. Jacket materialsallowed include PVC, PE’s, TPE’s, crosslinked polyolefins, neoprene, siliconeand fluoropolymers.protection against rodents when needed.As with the 600V Type TC cables, TypePLTC cables which meet the crush andimpact tests of UL 1569, may be markedER and used outside of tray or conduitwhen the installation practices in NECArticle 725.154(D) are observed.TheUL 1569 tests are the same crush andimpact tests used for metal clad cables,Temperature ratings are determined however these cables pass without theby the properties of both the insula- costly armor – allowing them to take upThis stan- much less room. This also increases thedard allows temperature listings at 60C, cables flexibility and typically reducestion and jacket materials.75C, 90C, 105C, 125C, 150C, 200C orthe cost as well.250C. Cold temperature listings may beUL 13 has specific test requirementsmarked on the cables if they pass cold for each additional marking that may apbend testing at -20C, -30C, -40C, -50C, pear in the legend on the cable. These-60C or -70C. Cold bend testing is much include oil resistance, low smoke and apless severe than cold impact testing proval for direct burial use.which involves dropping metal onto thecables in cold temperatures. PLTC cablesalso must pass at least the UL 1685 Vertical Flame Test and may be labeled FT4/IEEE 1202 if they also pass these flametests. All PLTC listed cables must alsopass a UV resistance test and there areminimum tensile strength and elongation requirements.PLTC cables may have a metal covering. Wire armor, metal braid, interlockedmetal armor or a metal sheath are allacceptable so long as they meet the requirements in UL 13 Section 14. Thesemetal coverings are used to enhancemechanical strength and also serve asTURCK Inc. 3000 Campus Drive Minneapolis, MN 55441-2656Phone: 763-553-7300 Application Support: 1-800-544-7769 Fax: 763-553-0708 www.turck.com5
6150V Instrumentation Tray Cablegood choice in hazardous locations.The requirements for cables in UL 2250 ITCare almost identical to the requirements inUL 13 PLTC. These cables are built to 300Vspecifications but are intended for use inapplications operating at 150V or less and 5amps or less. The only major difference inthe standards is ITC does not allow foamedinsulations. ITC cables are commonly usedin processing applications and are often aArticle 725 for Power Limited Circuit Cablesis very long and fairly complex and requiresClass 2 or Class 3 power supplies, etc. Article727 Instrumentation Tray Cable is writtento simplify installation practices for today’sinstrumentation and control networkswhich often require much less than 150Vand sometimes only milliamps. ITC-ER cablesTURCK Inc. 3000 Campus Drive Minneapolis, MN 55441-2656Phone: 763-553-7300 Application Support: 1-800-544-7769 Fax: 763-553-0708 www.turck.com
also pass the crush and impact tests of UL1569 and may be used outside of trays whensupported and protected in accordancewith Article 727.4(5).Other UL 13 CL CablesIncluded in the UL 13 Power Limited CircuitCables standard are cables with specificClass 2 or Class 3 listings which meet NECArticle 725. These cables are most oftenused as fixed wiring within buildings.CL2P and CL3P cables are intendedToday,manyfactoriesdesiretocommunicate data from the factory floorwith the office. Since Ethernet is thenetwork most commonly used in officeenvironments it has naturally become thepreferred network to transfer data from thefactory floor to the office. This has increaseddue to the popularity of Industrial Ethernetwhich is most commonly covered under UL444 Communications Cable. NEC Article800 established and outlines installationpractices.for use in ducts, plenums, or other airCommunications Cables employ thespaces. These cables must comply withCM abbreviation, with a ‘P’, ‘R’, ‘G’ or ‘X’the NFPA 262 test for Flame Travel and affixed to the end signifying differentSmoke of Wire and Cable. CL2P allowstypes: CMP is Plenum, CMR is Riser, CMG30 AWG to 6 AWG conductors and CL3P is General Purpose, CM is also Generalallows 28 AWG to 10 AWG conductors.The ‘R’ in CL2R and CL3R cables denotes a riser. These cables are installedin vertical runs penetrating more thanone floor or in a shaft. These cables mustpass the UL 1666 Test for Flame Propagation Height. Gauges allowed are thesame as for CL2P and CL3P cables.CL2 or CL3 cables without any otherdesignators are for use other than in plenums, risers or trays. These cables mustcomply with the UL 1685 and/or FT4/IEEE 1202 flame tests.CL2X or CL3X cables have a muchlesser flame test requirement, only thatof UL VW-1. These cables have limiteduses, limited lengths, and stringent protection requirements.Communications CablesPurpose with a few less requirementsand CMX is Limited Use. The variablesaffixed to the end of ‘CM’ also indicatethe severity of the flame test which dictates where they can be installed. CMPhas the most stringent flame and smoketests while CMX requires only the VW-1flame test.CONCLUSIONUnderstanding what tray cables are and thebasics of the many types that are availableis a good first step towards using themproperly. This white paper has begun todetail the basics of each type of cable, howto differentiate them and where they arecommonly used. It is always good practiceto consult an expert before purchasingand installing tray cables to ensure thecorrect type of cable is properly used. Thefollowing reference guide lays out the usesand governing standards for each cable typedefined throughout this paper in an easy-touse format.TURCK Inc. 3000 Campus Drive Minneapolis, MN 55441-2656Phone: 763-553-7300 Application Support: 1-800-544-7769 Fax: 763-553-0708 www.turck.com7
8TURCK Inc. 3000 Campus Drive Minneapolis, MN 55441-2656Phone: 763-553-7300 Application Support: 1-800-544-7769 Fax: 763-553-0708 www.turck.comTC-ERTCUL 1277Cable must be labeled ER,signifying it meets the crushand impact requirements ofType MC cable, UL 1569Conductors are UL 44 or UL 83ListedCables 600VUL 1277 Electrical Power andControl Tray CablesCable Agency ApprovalNEC Article 336Uses permitted:For power, lighting, control,and signal circuits.NFPA 79NEC Article 336.10(7)NFPA 7918 AWG – 8 AWGNational Electric Code2011 Compliance18 AWG – 8 AWGCable GaugeRules for InstallationIn industrial establishments where qualified persons servicethe installation. Cable is continuously supported andprotected against physical damage using mechanicalprotection, such as struts, angles, or channels permittedbetween a cable tray and the utilization equipment ordevice secured at intervals not exceeding 1.8m (6’).Permitted to transition between cable trays and betweencable trays and utilization equipment or devices for a distancenot to exceed 1.8m (6’) without continuous support.Permitted in cable trays, raceways, in outdoor locationssupported by a messenger wire, for Class 1 circuits aspermitted in Parts II and III of NEC Article 725, for non-powerlimited fire alarm circuits if conductors comply with therequirements of 760.49. NEC Article 336.10 (1) – (6).Cable must not be installed where it will be exposed tophysical damage or outside a raceway or cable tray systemunless it is outdoor in supported by a messenger wire or TypeTC-ER (Article 336.12 Uses Not Permitted) Cables.TC, TC-ER 600VType TC cables comply with UL1685 and/or FT4/IEEE 120270,000 BTU/Hr. (20.5 kW)vertical-tray flame tests.Cables which are sunlightresistant or intended for directburial must be so marked.Type TC cables comply with UL1685 and/or FT4/IEEE 120270,000 BTU/Hr. (20.5 kW)vertical-tray flame tests.Cables which are sunlightresistant or intended for directburial must be so marked.Other Comments
TURCK Inc. 3000 Campus Drive Minneapolis, MN 55441-2656Phone: 763-553-7300 Application Support: 1-800-544-7769 Fax: 763-553-0708 www.turck.com9PLTC-ERPLTCUL 13Exposed Run listingCable must be labeled ER,signifying it meets the crushand impact requirements ofType MC cable, UL 1569UL 13Cable for non-plenum andnon-riser Class 3 and Class 2circuits in general and in trays.Cables are rated for 300V butare not so marked.Cable Agency Approval22-12 AWG22-12 AWGCable GaugeNEC Article 725 .154(D)NFPA 79NEC Article 725NFPA 79National Electric Code2011 ComplianceRules for InstallationIn industrial establishments where qualified persons servicethe installation and where cable is continuously supportedand protected against physical damage using mechanicalprotection, such as struts, angles, or channels permittedbetween a cable tray and the utilization equipment ordevice secured at intervals not exceeding 1.8m (6’).Permitted to transition between cable trays and betweencable trays and utilization equipment or devices for a distancenot to exceed 1.8m (6’) without continuous support.Allowed in raceways (300.17) and Cable Trays (392). Article725 is complex: read carefully for any specific application.Also allowed in Hazardous (Classified) Locations per Article500-616 and Article 517 Part IV.PLTC, PLTC-ER 300VPLTC-ER cables comply with UL1685 and/or FT4/IEEE 120270,000 BTU/Hr. (20.5 kW)vertical-tray flame tests.PLTC-ER cables are sunlightresistant.Cable must be marked “directburial” for such use.PLTC cables comply with UL1685 and/or FT4/IEEE 120270,000 BTU/Hr. (20.5 kW)vertical-tray flame tests.PLTC cables are sunlightresistant.Cable must be marked “directburial” for such use.Other Comments
10TURCK Inc. 3000 Campus Drive Minneapolis, MN 55441-2656Phone: 763-553-7300 Application Support: 1-800-544-7769 Fax: 763-553-0708 www.turck.comITC-ERITCUL 2250Exposed Run listingCable must be labeled ER,signifying it meets the crushand impact requirements ofType MC cable, UL 1569UL 2250Cables are rated for 300V butare not so marked.Intended for use on circuitsrated 150V or less and 5 ampsor less.Cable Agency Approval22-12 AWG22-12 AWGCable GaugeNEC Article 727,Especially 727.4(5)NFPA 79NEC Article 727NFPA 79National Electric Code2011 ComplianceIn industrial establishments where qualified persons servicethe installation and where cable is continuously supportedand protected against physical damage using mechanicalprotection, such as struts, angles, or channels permittedbetween a cable tray and the utilization equipment ordevice secured at intervals not exceeding 1.8m (6’).Permitted in industrial establishments where only qualifiedpersons service the installation. Permitted in cable trays andraceways, also in hazardous locations per Article 501.10,502,10, 503.10, 504.20, 504.30, 504,80 and 505.15.May be used as aerial cable on a messenger. May be usedunder raised floors in rooms containing industrial processcontrol equipment and rack rooms where arranged to preventdamage to the cable and under raised floors in IT equipmentrooms in accordance with 645.5(E)(5)(c)Rules for InstallationITC, ITC-ER 300V Cable, Intended for 150V or less and 5 Amperes or lessITC-ER cables comply with UL1685 and/or FT4/IEEE 120270,000 BTU/Hr. (20.5 kW)vertical-tray flame tests.ITC-ER cables are sunlightresistant.Cable must be marked “directburial” for such use.ITC cables comply with UL 1685and/or FT4/IEEE 1202 70,000BTU/Hr. (20.5 kW) vertical-trayflame tests.ITC cables are sunlight resistant.Cable must be marked “directburial” for such use.Other Comments
TURCK Inc. 3000 Campus Drive Minneapolis, MN 55441-2656Phone: 763-553-7300 Application Support: 1-800-544-7769 Fax: 763-553-0708 sCL3RCL2RRiserCablesCL3PCL2PPlenumCablesFor Limited UseFor other than plenum, riser, ortray usesUL 13UL 13Cable Agency ApprovalCL3X 28-10 AWGCL2X 20- 6 AWGNEC Article 725.154(B)(3)725.154(C)NEC Article 725.154(B)(3)725.154(C)NEC Article 725.154(B)725.154(C)UL 1666CL3R 28-10 AWGCL2R 20- 6 AWGCL3 28-10 AWGCL2 20- 6 AWGNEC Article 725.154(A)725.154(C)NFPA 262National Electric Code2011 ComplianceCL3P 28-10 AWGCL2P 30- 6 AWGCable GaugeMust be used with protection such as a raceway. May beexposed in unconcealed spaces if cable does not exceed 10’ or3.05m.Permitted in one- and two- family dwellings . Raceway is notrequired but cables may be pulled into conduit or otherraceway.Cables installed in vertical runs and penetrating more thanone floor or vertical runs in a shaft. Must be used in listed risersignaling raceways and listed plenum signaling raceways.Permitted in cable trays installed indoors.For use in a duct, plenum, or other space used to transportenvironmental air. Permitted in cable trays installed indoors.Rules for InstallationCL3P, CL2P, CL3R, CL2R, CL3, CL2, CL3X, CL2XCables comply with UL VW-1vertical-specimen flame test.Cables comply with UL 1685and/or FT4/IEEE 1202 70,000BTU/Hr. (20.5 kW) vertical-trayflame tests.Cables comply with UL 1666 Testfor Flame-Propagation Height ofCables Installed Vertically inShafts. Flame propagationheight 12’ or 366 cm andtemperatures 850F (454.4C) ata height of 12’ or 366 cm.Cables comply with NFPA 262Test for Flame Travel and Smokeof Wire and Cable. Cableexhibits a maximum flamepropagation distance notgreater than 5’ or 152cm, peakoptical density of smokeproduced of 0.50 or less (32%light transmission) and anaverage optical density of smokeproduced of 0.15 or less.Other Comments
12TURCK Inc. 3000 Campus Drive Minneapolis, MN 55441-2656Phone: 763-553-7300 Application Support: 1-800-544-7769 Fax: 763-553-0708 alPurposeCMRRiserCMPPlenumNEC Article 800UL 1685 Vertical Tray Fire Propagation and Smoke-Release TestNEC Article 800VW-1 Flame Test UL 1581UL 444NEC Article 800CSA C22.2 No. 0.3M-2001 VerticalFlame Test – Cables in Cable Trays.Damage not to exceed 1.5m (4’11”)UL 444UL 444NEC Article 800UL 1666 Test for Flame Propagation Height of Electrical andOptical-Fiber Cable InstalledVertically in ShaftsUL 444National Electric Code2011 ComplianceNEC Article 800NFPA 262 Test for Flame Travel andSmoke of Wires and Cables for Usein Air-Handling SpacesCable GaugeUL 444Cable Agency ApprovalRules for InstallationSee Table 800.154(a) NEC 2011See Table 800.154(a) NEC 2011See Table 800.154(a) NEC 2011See Table 800.154(a) NEC 2011See Table 800.154(a) NEC 2011CMP, CMR, CMG, CM, CMXOther Comments
Cables-White-Paper.pdf
Mar 23, 2012 · cable is or the benefits of using tray cables. Another gray area for many comes from the variety of types of tray cable, what each means and in which applications each type should be used. This paper will: Define what a tray cable is Describe the different types of tray cables Provide uses a
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Tech Tray 030-709 Push-In Nylon Christmas Tree Fasteners Tech Tray 12 60 x Tech Tray 030-720 x GM/Chrysler Body Retainers Tech Tray 20 252 x Tech Tray 030-722 x Ford Body Retainers Tech Tray 13 160 x Tech Tray 030-724 x Import Body Retainers Tech Tray 15 195 x Tech Tra
ZaslavlEnergo offers two types of cable tray, ladder cable tray and channel cable tray. Channel cable tray is available in wide range of widths, and ideal for pneumatic tubing and low-voltage or communications cables. ZaslavlEnergo also offers light weight cable tray designed with snap-on cover. zaslavlenergo.by / fiberglass cable tray 7
M 337 COAXIAL CABLES Description Properties Page RG-Coaxial Cables 338 RG-Coaxial Cables 339 RG-Coaxial Cables 340 Halogen-Free RG-Coaxial Cables 341 CATV-Cables 342 SAT-Coaxial Cables up to 2150 MHz, for satellite-receivers, double screened 343 Multimedia-Coaxial Cables SAT 1,0/4,6GH, up to 2400MHz, for digital-tv, double screened,
product range l.v. pvc & xlpe power cables with copper and aluminium conductor l.v. pvc & xlpe control cables with copper conductor m.v. power cables upto 33 kv ehv cables from 66kv to 220kv m.v. / l.v. aerial bunched cables (abc) zero halogen cables fire survival cables (fs) instrumentation cables screened / unscreened industrial braided cables
5. Wire Mesh Cable Tray 6. Single Rail Cable Tray (1) Ladder Cable Tray Generally used in applications with intermediate to long support spans 12 to 30 feet. Ladder cable tray is used for about 75 percent of the cable tray wiring system installations. It is the predominate cable tray
CABLE TRAY SYSTEM Type CTP Type CTS Perforated Cable tray Solid Cable tray m m m mm Straight Tray Ordering Way : Note: CTP 50 - 300 - HG Model Side Height (mm) Width (mm) Material/Finish. CTP: Cable Tray Perforated CTS: Cable Tray Solid PG: Pre galvanized Steel HG: Hot Dip Galvanized AL: Aluminum S4: Stainless Steel 304 S6: Stainless Steel 316 .
ANSI A300 (Part 7), approved by industry consensus in 2006, contains many elements needed for an effective TVMP as required by this Standard. One key element is the “wire zone – border zone” concept. Supported by over 50 years of continuous research, wire zone – border zone is a proven method to manage vegetation on transmission rights-of-ways and is an industry accepted best practice .
