METAL CLAD WIRING SYSTEM - Okonite

1 METAL CLADWIRING SYSTEMTHEOKONITECOMPANYR amsey, New Jersey 07446 The Preferred Cable forCLASS I, DIVISION 1 OR ZONE 1 Best Cable for PWM CircuitsThe Preferred Cable forCLASS I, DIVISION 1 OR ZONE 1 Best Cable for PWM CircuitsC-L-X is The Okonite Company s welded and continuously corrugated METAL clad WIRING SYSTEM . C-L-X offers engineers andspecifiers a cable SYSTEM with built-in environmental protection forall types of electrical circuit whether used for instrumentation,control, signal or power distribution. With millions of feet installedthroughout the world in every type of climate, C-L-X hasestablished a proven record of reliable CLADWIRING SYSTEM 2008 The Okonite CompanyTHEOKONITECOMPANYINTRODUCTIONT here are many reasons why users prefer Okonite C-L-X cables.

2 C-L-X is the preferredcable for Class I, Division 1 or Zone 1. It s the best off-the-shelf cable for PWM 2C-L-X is a cable in conduit WIRING systememploying a mechanically strong yet flexiblesheath of corrugated aluminum, copper,bronze or steel which can be applied over avariety of cable cores. C-L-X is a standard inmany industries: Chemical, Petrochem, Pulp& Paper, High Tech, Food Plants, Metals,Mining, Transportation, Generation, IS ITS OWN CONDUITWIRING SYSTEMC-L-X is used for instrumentation, control,low voltage and medium voltage powercircuits. C-L-X is well recognized by theNational Electrical Code.

3 It is recognized inArticle 330 METAL -Clad Cable, as a factoryassembly of one or more insulated circuitconductors in a corrugated metallic HAS A WIDE RANGE OFAPPLICATIONSIn accordance with Article 330, Type MCcable is permitted for the following uses: For PWM-VFD Drives For services, feeders, and branchcircuits For power, lighting, control and signalcircuits indoors or outdoors where exposed or concealed direct buried where identified forsuch use in cable tray, where identified forsuch use in any raceway as open runs of cable as aerial cable on a messenger in hazardous (classified) locationsand as permitted in Articles 501, 502,503, 504 and 505 in wet or dry locations concrete encasedPAGE 3C-L-X cables have been permitted to be usedin Class I & II, Division 2 and Class III Division 1& 2 locations for many years.

4 The AmericanPetroleum Institute (API) recognizes the use ofC-L-X cables for Class I Division 1 locations inaccordance with recommended practice 14 Fand Class I Zone 1 locations in accordancewith recommended practice 14 1996 theNEC permits C-L-XMetal-Clad cablesto be used in Class Iand II Division 1hazardous(classified)locations, providedthey are listed forsuch use. MC-HL( METAL Clad-HazardousLocations) cable isa permitted WIRING method for Class I, Zone 1,or Division 1 hazardous locations per the2008 NEC Article ( ). Articles 501, 502and 505 allow C-L-X sheathed cables as analternate to costly metallic conduit or mineralinsulated cable.

5 These articles invokespecific constructional details, all of whichOkonite C-L-X cables 725, Remote Control, Signaling and Power Limited Circuits, and Article 727 Instrumentation Tray Cable: Type ITC recognizes the use of a C-L-X sheath for Class 1, 2,or 3 circuits, power limited circuits as well as ITC Circuit application. C-L-X may also beused as a sheath on power limited fire alarm cable (FPL) per Article 760C Power LimitedFire Alarm Circuits . Per Article (A) (1) (d) Type ITC-HL may be installed inhazardous Class I, Zone 1 or Division 1 RECOGNIZED FOR DIVISION1 AND ZONE 1 HAZARDOUSLOCATIONST hese details are:1.

6 A gas/vapor tight continuouscorrugated aluminum A separate grounding conductorper Article An overall polymeric Standard 2225 Standard For METAL -CladCable and Cable Sealing Fittings ForHazardous (Classified) Locations, is theindustry standard for this listing. Thisstandard mandates performance tests morestringent than those required for Type MCcable. In order to be labeled for Division 1hazardous locations (Type MC-HL) by ULthe C-L-X cables must meet the followingcriteria:1. a low temperature -40 C impact a more severe room temperatureimpact a more severe room temperaturecrush a more severe vertical tray flame new generation of (insulated gate bipolar transistor) typehigh speed drives utilize increasedswitching rates.

7 This advancedtechnology offers many benefitsincluding smaller more economicaldrives, lower audible noise, enhancedperformance at low speeds andreduced harmonic ripple currents whichminimize motor these benefits have come some unanticipated challenges to the drive systems. Theincreased switching rate has increased the frequency of the electromagnetic noise into theMhz range. The higher Mhz ranges cause detrimental reflected waves and EMI/harmoniceffects. The problems that now arise, although intermittent, include trips and reduced cableand motor life. Drives, cables and motors must all perform together in this SYSTEM .

8 Thesecomponents must be evaluated as a SYSTEM to assure optimum performance IS THE SOLUTION FORPWM VARIABLE SPEED DRIVESDRIVE TECHNOLOGYTHE Okonite /C-L-X SOLUTIONC-L-X cable with its continuously welded and corrugated aluminum armor has become thepreferred cable for use with the new ac drive technology. The exceptional shieldingcharacteristics of the armor along with the high dielectric strength and low permativity of theproprietary insulation combined with a 3-ground wire configuration located at 120 spacingin the cable core has proven to be the right combination for this demanding application.

9 Intests performed by the major drive manufacturers, C-L-X has been superior, providingoptimum 4 PAGE 5C-L-X cables are certified by the American Bureau of Shipping as CWCMC cable*. Thiscertification allows its use for power distribution, control and signal cable in classified(hazardous) and unclassified locations. With this certification, C-L-X cables may beinstalled on off-shore drilling units, fixed and floating production platforms and on-boardvessels. These cables are also listed by UL to Standard 1309, Marine Shipboard Cable .Table 1 summarizes the many third party certifications for C-L-X products in the marineshipboard CERTIFIED BY ABSFOR SHIPBOARD CABLEC-L-X IS MECHANICALLY STRONG*A formal Okonite ABS certification is available at the ABS website, to Product Search and type Okonite for a complete list of Okonite certification by s mechanical strength is demonstrated by its compliance to the more severe impactand crush requirements mandated by UL Standard 2225 for Division 1 or Zone 1 Hazardous Locations.

10 The inherent strength of the METAL used is multiplied many timesover by its engineered 6C-L-X is flexible and can be easilytrained on trays, ladders or othersupports. The minimum bending radiusfor multiconductor cable is 7 times thecable diameter. As with any cable, careshould be taken to avoid exceeding thebending radius, (particularly whenrollers are used), or exceedingapproved sidewall pressure is easily installed, spliced andterminated. C-L-X is available in verylong lengths, is light in weight and canbe pulled into trays or placed on laddersusing appropriate rollers and followinggood installation for splicing and terminating canbe easily carried out with a wide range of off-the-shelf kits available from C-L-X armor is a flexible tube built with a highly engineered continuous argon gas arcweld SYSTEM .