Cut Sheet

Class I, Division 1 and 2, Groups B, C, D
Class II, Division 1 and 2, Groups E, F, G
Class III
NEMA 3, 4
Enclosures and Junction Boxes
EnclosurEs and Junction BoxEs: Hazardous location conduit outlEt BoxEs
Visit our website at www.appletonelec.com or contact us at [phone].
© November 2011
499
GR and GRF Conduit Outlet Boxes
Explosionproof, Dust-Ignitionproof
UNILETS
®
for use with Threaded Metal Conduit. Furnished with Internal Ground Screw and O-Ring.
Applications
• Complieswithawiderangeofclassiedarearequirements.
• Corrosion-resistant:idealindoorsorout.
• Forpullingofwires.
• Connectconduitlengthsandchangedirectionofconduitruns.
• Provideaccessformaintenance.
Features
• GRboxesofferstenhubarrangements.
• GRFboxeshaveintegralmountingange.
• Malleableironbodieshavehightensilestrength,ductilityand
providesgreatresistancetocorrosion,impact,andshock.
• Accuratelytapped,taperedhubthreadsfortight,rigidjoints
andgroundcontinuity.
• Furnishedwithcovers.
• Generalpurposewiring.
• Functionassealingttingswhenusedwithsealingcovers(see
NECforrestrictions).
• Internallythreadedbodywithexternallythreadedcover.
• Covershaveprynotchesforbarorwrench.
• Accommodatesealing,dome,hubandunionhubcovers,and
canopies.
• StandardO-ringsprovideraintightt.NEMA3,4.
• Internalgroundscrewstandard.
• Smooth,roundedintegralbushingineachhubtypebox
protectsconductorinsulation.
Standard Materials
• Body:malleableironorcopperfree(4/10of1%max.)aluminum
• Cover:copperfree(4/10of1%max.)aluminum
Standard Finishes
• Malleableironbodiesandcovers:triple-coat—(1)zinc
electroplate,(2)chromate,and(3)epoxypowdercoat
• Aluminumbodiesandcovers:epoxypowdercoat
Options
• Toorderbodywithoutcover,addsufx-LCtocatalognumber.
• Formalleableironbodyandcover,addsufx-M.
• PVCcoatingavailableonspeciedproducts.Addsufx-PVC
tocatalognumber.ToaddPVCcoatingtoitemsnotspecied,
contactyourlocalsalesrepresentative.
Certifications and Compliances
• Class1,Zone1&2IIA&IIB
• ULListed:E10444
• CSAStandard:C22.2No.25,C22.2No.30
• CSACertied:013017
 In Class I, Division 1, Group B atmospheres, all conduit runs must have a sealing fitting (not supplied) field-installed adjacent to the enclosure.