cable limiter

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Cable Limiters

Increase System Reliability

Decrease Downtime



IncreasesystemreliabilityandversatilitywithFerrazShawmutCableLimiters.CableLimiters

aredesignedfortheprotectionoflowvoltagedistributionnetworks,feedersandservice

entrancecables.PermittedbyNationalElectricCodeArticle230.82(1),cablelimitersprevent

serviceoutagesbyisolatingdamagedcablesensuringcontinuityofcustomerpower.

Ferraz Shawmut Cable LimitersInstallFerrazShawmutcablelimitersinunderground

powerdistributionsystemsfoundincommercial,

industrial,andresidentialapplications.Cablelimitersare

designedforuseinbothradialandnetworktypeunder-

groundsystemstoreducethehazardsofunexpected

downtimeandmaintenance.FerrazShawmutoffersa

fulllineofboth600VACand250VACcablelimiters,with

the600VACproductlinebeingULListedforcodecom-

pliance.Selecttheproperlimiterforyourapplicationby

choosingfromsevenavailableterminalcombinations

suitableforaluminumorcopperwiresizesfrom1AWG

upto1000kcmil.

Customer Benefts

CableLimitersofferusersaninexpensivesolutionto

preventcostlydowntime.CableLimitersisolatefaulty

cablesandallowtheremainingcablestokeepyourbusi-

nessupandrunning.Faultycablescannowbepulled

andreplacedduringascheduledorroutineshutdown

when power is not needed.

Applications and InstallationThree common cable limiter applications include:

1.Distributionnetworksystemswiththree

or more cables in parallel per phase

Install cable limiters on each end of each cable to

allowforisolationofdamagedcables.Thelimiters

removedamagedcablesfromthecircuittomain-

tain service.

2.Commercialandresidentialapplications

with multiple customers fed from one

transformer

Install one cable limiter on the secondary of theutility transformer per cable run. Allow businesses

and homes to maintain power if a fault may occur.

3.SecondaryTies

Protect circuits that connect two power sources

orpowersupplypointstopreventvaporizationof

cables under short circuit faults.

ncrease system

reliability and

versatility with

Ferraz Shawmut

Cable Limiters.



Three or more Conductors

per Phase.

Forlargerampereratedsystemsitiscommontouseseveralsmaller

cablesinparallel,insteadofonelargecable,toshareaheavierload.

ForthisapplicationCableLimitersareinstalledonthesecondaryof

the utility transformer and on the line side of the service entrance

disconnect. It is important to install cable limiters on each end of each

cable. In most cases the customer hired contractor is responsible for

installinglimitersattheutilitytransformerandonthelinesideofthe

serviceentrancedisconnectatthebuilding.Ifonecableexperiences

afault,thefaultycablewillbeisolatedfromthenetworkallowingthe

remainingcablestomaintainpowertothesystem.Thedamagedcable

cannowbereplacedduringascheduledshutdownwhenrevenuegainor

productionisnotatriskofdowntime.Unexpectedpowerlosscanresult

in lost revenue.

Industrial

NECArticle230.82(1)permitstheinstallationofcablelimitersonthe

supplysideoftheserviceentrancedisconnect.Ensuresystemreliability,

guaranteeoperation,reducemaintenancecostsandpreventunexpected

downtime.Benetfromusingcableprotectioninalltypesofindustries

suchasmetalfabrication,wastewater,assembly,electronics,textile,oil

andgas,pulpandpaper,rubber,steel,aluminum,glassandchemical.

FerrazShawmutcablelimitersaredesignedtowithstandharshenviron-

mentsandwillnotdeterioratefromelementssuchasage,moistureor

environmentalsurroundings.FerrazShawmutlimitersareself-contained

andself-protecting.Variousterminationofferingsaccommodatealltypes

of installations.

Commercial

Malls,stripmalls,shoppingcenters,outlets,retailbusinesses,univ

ties,governmentfacilities,andofcebuildingsaretypicalcustome

thatbenetfromtheinstallationofcablelimiters.Protectincoming

powertotheretailcenterspowerdistributionnetwork.Constructio

workexternaltothefacilityisamajorcauseofdamagedcables.

Improperlymarkeddigsites,equipmentmalfunctionandoperator

errorcanallresultinpotentiallyhazardouselectricalfaults.Protec

commercial developments with cable limiters and prevent potentia

revenues to its tenants.

Application Example

ServiceEntrance

RecommendedProduct:Amp-TrapCP

ServiceEntrance

FaultOPEN

UtilityTransformer

CableLimiters

CableLimiters



Secondary Ties.

ECarticle450.6(A)(3)statesthatanysecondarytie,600Vor

essnominal,shallbeequippedwithaprotectivedevicethatwill

penundershort-circuitconditions.Article450.6(A)(3)permits

he installation of a cable limiter as an acceptable method of

meetingthisrequirement.

secondary tie is a point in a circuit where two power sources

rpowersupplypointsareconnected,suchasthesecondary

ftwotransformers.Forexamplethiscouldbetwoindividual

ansformersorabankoftransformersoperatingasaunit.

Multiple Services Supplied by

a Single Source.

Multipleservicessuchasresidentialdevelopments,apartment

buildings,andsmallcommercialbuildingsconsumelighterloads

andareoftenfedfromasingletransformer.Topreventtheentire

neighborhood,apartmentbuildingorstripmallfromexperiencing

anoutage,cablelimitersareinstalledoneachcableruntoeach

individualservice.Inthecaseofacablefault,thefaultyservice

willbeisolatedfromtheremainingcustomers.Forthisapplication

onlyonecablelimiterisrequiredpercablerunonthesecondary

of the utility transformer.

ecommendedProduct:Amp-TrapCP

Transformer Transformer

ServiceService

UtilityTransformer

RecommendedProduct:Amp-TrapCPand2CL

Customer Customer Customer Customer

CableLimiters

CableLimiter

OvercurrentProtection



Amp-Trap®

CP – 600VACCable Limiters

Approved 600VAC limiters for heavy commercial and industrial

applications. Ideal for multiple cable runs per phase. Increase

reliability and prevent unexpected downtime.

• ULListed,FileE305297

• 600VAC,200kAIR

• Superiorshortcircuitprotection

• Cablesizes#2–1000kcmil

• Seventerminalcombinationsavailable

• CopperorAluminumcable

• Optionalheatshrinkormoldedrubber

boots available

Amp-Trap®

2CL – 250VACCable Limiters

Approved250VAClimitersforlightcommercialandresident

applications.Protectundergroundcablerunsfromthermal

damagecausedbyshortcircuits.

• FerrazShawmutCertied

• 250VAC,200kAIR

• Superiorshortcircuitprotection

• Cablesizes#1–500kcmil

• Fourterminalcombinationsavailable

• CopperorAluminumCable

• Shorterinlengththanstandard600VACrated

cable limiters

Installationinformation,includingcrimpingtoolrecommendations,limiterperformancecharacteristicsandpartnumbersisavailable

onlineatus.ferrazshawmut.comorbycontactingyourlocalsalesrepresentative.



or more information,

sit our website at

s.ferrazshawmut.com.

SA

74 Merrimac Street,

ewburyport, MA 01950

: 978-462-6662

978-462-0181

anada

8 Horner Avenue

oronto, Ontario,

anada M8Z 5Y3

: 416-252-9371

416-252-6572

2008 Ferraz Shawmut. All rights reserved.

A relentless pursuit of protection for electrical components,

systems—and the people who use them.

FerrazShawmutisaninternationalcompanymanufacturingthewidestrangeofcircuitprotection

solutionsintheelectricalindustry.Drawingonacenturyofexperience—andanongoingcommitment

tocriticalresearchinelectricalsafety—weprovideindustrial,commercial,andOEMcustomerswith

innovativeproductsandtechnicalsupportteamstoincreaseeffectiveness,simplifyapplications,and

enhanceproductivity.Learnmoreaboutourcircuitprotectionsolutionsatus.ferrazshawmut.com.

-CL-001

cable limiter

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