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20‐02‐2014version2
How to install Lock Solar earthing components
Introductiontoearthing
The"TL"ortransformer‐lessinvertersthataremostcommonlyavailabletoday,all
recommendtoprovideearthingtothesolarpanelframesandrailingcomponents.In
somecountriesthisismandatorylaw,whileinothercountriesitisnot.Inallcases,
LockSolarrecommendsthatthesecomponentsbeearthed,asperthelocalelectrical
andinstallationstandardsandlaws.
LockSolarhastwocomponentsthatcanbeused,whenearthingoftheinstallationis
required.Theyare:
Partdescription
AluminiumEarthingLug
(locatedeithersideofaRailJoiner)
LockSolarpart
number
Photo
309‐001
StainlessSteelEarthingClip
(locatedundereveryotherMidClamp)
Lock Solar Ltd.
107‐001
L9, 1 Silom Road, Silom, Bangrak, Bangkok, 10500, Thailand
LockSolarEarthingLug(309‐001)
TheEarthingLugisusedtoelectricallyconnectrailstoacommonearthingconnection
point(suchasanACswitchboardorinverterearth).ForeveryRailJoinerusedthere
needstobetwoEarthingLugsinstalled,attachedateitherendofit.Usea100mmlong,
earthcablelink(4mmdiametergreen/yellowcable)inordertoelectricallyconnectthe
twoLugstogether.
TightenthestainlesssteelEarthingLugscrewthroughtheEarthinglugpiece,applyinga
torqueofaround8Nmintothecopperearthingwire.Ensureafterthatthecopperwire
isfastenedok,byagentle“pull”ofthecable.
100mmlong,4mm
electricalearthingwire
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LockSolarEarthingClip(107‐001)
TheEarthingClipisahighqualitystainlesssteelclip,whichprovidesareliableearthing
connectionbetweenthesolarpanelframeandtheRail.Itislocatedundereveryother
MidClampandisnotusedwithEndClamps.
EveryEarthingClipcanthereforeearthtwopanelssimultaneously,asshowninthe
followingdiagram.Withoddnumberpanelstrings,thererequiresanadditionalClipat
theverylastpanel.
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InstallingtheEarthingClip
Step1:SlightlyliftupthespringontheMidClamp,andslidetheEarthingClipintothe
bottomoftheclamp,sothatitlaysontheRailNut.
TheEarthingClipfitsinbetweenthetopoftheRailNutandthebottomoftheSpring.
Step2:CliptheMidClampintotheRail,locatedinbetweenthesolarpanels.
Besureto"CLIP!"theEarthingClipintoplace,ontotheRail.
FirmlypushtheClipdownintotheRail,untilyouheara"click!"sound.
"CLICK!"
Firmlypushearthing
clipDOWNontotherail
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Step3:Slidethepanelsintoplace,andovertheEarthingClip.
Step4:TightentheMidClampintoplace.
EnsurethattheEarthingClipissecuredinbetweenthepanelframeandtheRail.
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