ADTRAN Total Access 372 - Alternative Grounding and Power Wiring

Installation
61287722G1-5B 21
Alternative Grounding Method
ThefollowingisanalternativegroundingmethodifMGNisnotavailable.
Article800‐11coftheNationalElectricalCode(NEC)statesforthepurposeofgroundingthe
pointofentryforcommunicationswiringandcablesshouldbewithin20feet(6.1meters)of
theelectricalserviceentrypoint.Wherethisisimpract
ical,a
separategroundingelectrode
shouldbeinstalledincompliancewithArticle800‐40‐(b)(3)andbondedincompliancewith
Article800‐40(c)and(d).
Brieflystated:
•Acoppercladsteelgroundrodshouldbedrivenintotheearthatleast8feet(2.4meters)
deep.
•AnEarthResistanceMeggerTestSetisusedtodetermi
netheresistance
oftheearth
electrode.TheNECrequiresthisgroundrodconductiontoearthtobenomorethan25
ohmsofresistance.If25ohmscannotbeachievedwithasingleelectrode(groundrod),a
secondaryelectrodemustbeusedandbondedtotheprimaryelectrodeusinga12AW
G
minimum
coppergroundwire.
•Thesecondaryelectrodemustbespacedatleast8feet(2.4meters)fromtheprimary
electrode.
•The12AWGgroundwireshouldbeconnectedtothegroundrodwithaULListedground
clamp.
Local Power Source Wire Run
WARNING
!
•Beforemakinganypowerconnectionstothisequipment,verifythepower
isoff(fuseremoved/breakertripped).
•This equipmentshouldonlybeoperatedfromthetypeofcertified/listed
powersupplyrecommendedbythemanufacturer.
CAUTION
!
• Usecautionwhenroutin gwiresandcables.Avoidseverebendingand
routingoversharpedges.Usegrommetmaterialwhenpossibletoavoid
wearoncableinsulation.
•Toreducetheriskoffire,useminim umno.26AWGtelecommunications
linecord.
InstallationoftheLimitedPowerSource(LPS)willbedictatedbyon‐siteconditionsandlocal
telephonecompanypractices.RefertoFigure10 onpage22andthefollowingstepsto
completetheinstallation.
1. InstalltheLocalPowerSource(LPS)wirerunfromtheSBUONTtotheconnectorofthe
LPSviathecustomerprovided
PVCconduit(ormethodusedbyyourlocaltelephone
company).Forpower,ADTRANrecommendsusing16AWGwireatamaximumof100
feet(30.5meters).Foralarmsignals,ADTRANrecommendsusing24AWGwire.Donot
plugintheUPSgreenconnectoratthisti
me.Thiswil
lbedoneafterthesubscriber’swire/
cablesareterminatedduringturn‐upandtesting.
2. Ifnecessary,tiewrapboththe12AWGgroundwireandLPSwireruntotheburiedfiber
dropcableriserconduit.