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
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© November 2011
502
Hub Type
Conduit Size
(Inches)
Cover Opening
Inches/Millimeters
Capacity
in
3
/dm
3
Form
Number 
Catalog Number 
Malleable Iron 
Body With
Aluminum Cover
Aluminum
Body with
Aluminum Cover
GRFC
1/2 3.38/85.9 18.0/0.29 1 GRFC50 GRFC50-A
3/4 3.38/85.9 18.0/0.29 1 GRFC75 GRFC75-A
1 3.38/85.9 18.0/0.29 1 GRFC100 GRFC100-A
GRFL
1/2 3.38/85.9 18.0/0.29 1 GRFL50 GRFL50-A
3/4 3.38/85.9 18.0/0.29 1 GRFL75 GRFL75-A
1 3.38/85.9 18.0/0.29 1 GRFL100 GRFL100-A

GRFT
1/2 3.38/85.9 18.0/0.29 1 GRFT50 GRFT50-A
3/4 3.38/85.9 18.0/0.29 1 GRFT75 GRFT75-A
1 3.38/85.9 18.0/0.29 1 GRFT100 GRFT100-A
GRFX
1/2 3.38/85.9 18.0/0.29 1 GRFX50 GRFX50-A
3/4 3.38/85.9 18.0/0.29 1 GRFX75 GRFX75-A
1 3.38/85.9 18.0/0.29 1 GRFX100 GRFX100-A
Dimensions
 In Class I, Division 1, Group B atmospheres, all conduit runs must have a sealing fitting (not supplied) field-installed adjacent to the enclosure.
 Other covers available—see GR and GRF Conduit Outlet Box Covers page. Order separately
 For malleable iron body and cover, add suffix -M.
 Form number designates body and matching cover sizes. To order body without cover, add suffix -LC to catalog number.
GRF Flanged Conduit Outlet Boxes
Explosionproof, Dust-Ignitionproof
UNILETS
®
for use with Threaded Metal Conduit. Furnished with Internal Ground Screw and O-Ring.