Master Index
Cat. No. Index
J Index
January 2002
Explosion-Proof Junction Unilets
Features:
Junction Boxes
Outlet Boxes
Master Index
January 2002
J Index
Cat. No. Index
J-1
Compliance Data:
CSA Approved
Class I, Div. 1 and 2,
Groups B, C, D;
Class I Zone 1 and 2, IIB + H2 T6
Class II, Div. 1 and 2,
Groups E, F, G;
Class III, Enclosure 3,
weatherproof
EEMAC Type 3R, 7BCD, 9EFG
99 Union Street
Elmira, Ontario N3B 3L7
J-2
Cat. No. Index
Master Index
October 2008
J Index
Explosion-Proof Junction Unilets
GR
GRF
GRUE-200
GRSS
ELBY
GRJ
GRJS
CPU
ER
EXB
ELBD
Page
Description
3-4
GR Junction Unilets
5
Covers and Canopies
4
GRF Junction Unilets
5
Covers and Canopies
6
GRUE-100 Universal Junction Boxes
7
GRUE-200 Universal Junction Boxes
8
GRSS Conduit Outlet Boxes
9
ELBY Capped Elbows
10
GRJ Junction Unilets
11
Covers
11
GRJS Junction Unilets
12
CPU Universal Outlet Boxes
13
ER Junction Unilet
14
EXB Cast Iron Junction Boxes
15
Ordering Information, Tapping and Drilling Information
16
ELBD 90° Pulling Unilets
17-19
DER and GUB Junction Unilets
18
Ordering Information
19
Covers
20
GUBM Instrument Unilets
21, 22
Dimensions - DER and GUB
23
GRU Conduit Outlet Boxes with Union Hubs
23
GRUT and GRUSE Union Hubs, Dimensions
24
Wiring Capability - Conduit Outlet Boxes
GUB/DER
GRU
99 Union Street
Elmira, Ontario N3B 3L7
October 2008
Master Index
Cat. No. Index
J Index
Master Index
Cat. No. Index
J Index
January 2002
CSA Approved
Class I, Div. 1 and 2
Groups B, C, D;
Class I, Zone 1 and 2, IIB + H2 T6,
Class II, Div. 1 and 2
Groups E, F, G;
Class III, Enclosure 3
J-3
GR Junction Unilets, Malleable or
Copper-Free* Aluminum:
Explosion-Proof, Dust-Ignition-Proof,
and Weather Resistant (Raintight)
Malleable
Iron
Cat. No.
Illustration
Aluminum
Catalogue
Number
GRE50
GRE75
GRE100
GRE125
GRE150
GRE50-A
GRE75-A
GRE100-A
GRE125-A
GRE150-A
GRC50
GRC75
GRC100
GRC125
GRC150
GRC200
GRC50-A
GRC75-A
GRC100-A
GRC125-A
GRC150-A
GRC200-A
GRL50
GRL75
GRL100
GRL125
GRL150
GRL200
GRL50-A
GRL75-A
GRL100-A
GRL125-A
GRL150-A
GRL200-A
GRLB50
GRLB75
GRLB100
GRLB125
GRLB150
GRLB200
GRLB50-A
GRLB75-A
GRLB100-A
GRLB125-A
GRLB150-A
GRLB200-A
GRN50
GRN75
GRN100
GRN125
GRN150
GRN50-A
GRN75-A
GRN100-A
GRN125-A
GRN150-A
GRT50
GRT75
GRT100
GRT125
GRT150
GRT200
GRT50-A
GRT75-A
GRT100-A
GRT125-A
GRT150-A
GRT200-A
GRX50
GRX75
GRX100
GRX125
GRX150
GRX200
GRX50-A
GRX75-A
GRX100-A
GRX125-A
GRX150-A
GRX200-A
Cover
Form
Opening Number
Description
1/2
3/4
1
1-1/4
1-1/2
3-3/8
3-3/8
3-3/8
3-15/16
4-7/8
1
1
1
2
3
GRC
1/2
3/4
1
1-1/4
1-1/2
2
3-3/8
3-3/8
3-3/8
3-15/16
4-7/8
4-7/8
1
1
1
2
3
3
GRL
1/2
3/4
1
1-1/4
1-1/2
2
3-3/8
3-3/8
3-3/8
3-15/16
4-7/8
4-7/8
1
1
1
2
3
3
GRLB
1/2
3/4
1
1-1/4
1-1/2
2
3-3/8
3-3/8
3-3/8
3-15/16
4-7/8
4-7/8
1
1
1
2
3
3
GRN
1/2
3/4
1
1-1/4
1-1/2
3-3/8
3-3/8
3-3/8
3-15/16
4-7/8
1
1
1
2
3
GRT
1/2
3/4
1
1-1/4
1-1/2
2
3-3/8
3-3/8
3-3/8
3-15/16
4-7/8
4-7/8
1
1
1
2
3
3
GRX
1/2
3/4
1
1-1/4
1-1/2
2
3-3/8
3-3/8
3-3/8
3-15/16
4-7/8
4-7/8
1
1
1
2
3
3
GRE
NOTE: All GR boxes above are supplied with O-ring.
See page 5 for other covers available. If no covers are desired, specify catalogue number with suffix “LC”, and deduct price of cover.
Form numbers indicate sizes of unilets which take correspondingly classified covers.
Master Index
January 2002
J Index
Cat. No. Index
99 Union Street
Elmira, Ontario N3B 3L7
J-4
CSA Approved
Class I, Div. 1 and 2
Groups B, C, D;
Class I, Zone 1 and 2, IIB + H2 T6,
Class II, Div. 1 and 2
Groups E, F, G;
Class III, Enclosure 3
Cat. No. Index
Master Index
January 2002
J Index
GR and GRF Junction Unilets,
Malleable or Copper-Free** Aluminum
Explosion-Proof, Dust-Ignition-Proof,
and Weather Resistant (Raintight)
Catalogue Number
Malleable Iron
Aluminum
Description
Conduit
Size
Cover
Opening
Form
Number
GR Junction Unilets
Furnished with externally threaded surface cover
GRCA50
GRCA75
GRCA50A
GRCA75A
GRCA
1/2
3/4
3-3/8
3-3/8
1
1
GRLA50
GRLA75
GRLA50A
GRLA75A
GRLA
1/2
3/4
3-3/8
3-3/8
1
1
GRTA50
GRTA75
GRTA50A
GRTA75A
GRTA
1/2
3/4
3-3/8
3-3/8
1
1
Cover
Opening
Form
Number
NOTE: All above are supplied with rear hub.
Form
1
1
1
2
3
Hub
Sizes
1/2
3/4
1
1-1/4
1-1/2
Catalogue Number
Malleable Iron
Aluminum
A
B
C
D
E
3-3/4
3-3/4
3-3/4
4-1/2
5-3/4
2-3/8
2-3/8
2-3/8
2-11/16
3-3/4
3-1/16
3-1/16
3-1/16
3-5/16
4-3/8
21/32
21/32
15/16
1-5/32
1-3/8
11/16
11/16
13/16
7/8
1-5/16
Conduit
Size
Description
Furnished with externally threaded surface cover
GRFC50
GRFC75
GRFC100
GRFC50A
GRFC75A
GRFC100A
GRFC
1/2
3/4
1
3-3/8
3-3/8
3-3/8
1
1
1
GRFL50
GRFL75
GRFL100
GRFL50A
GRFL75A
GRFL100A
GRFL
1/2
3/4
1
3-3/8
3-3/8
3-3/8
1
1
1
GRFT50
GRFT75
GRFT100
GRFT50A
GRFT75A
GRFT100A
GRFT
1/2
3/4
1
3-3/8
3-3/8
3-3/8
1
1
1
GRFX50
GRFX75
GRFX100
GRFX50A
GRFX75A
GRFX100A
GRFX
1/2
3/4
1
3-3/8
3-3/8
3-3/8
1
1
1
NOTE: All GR boxes above are supplied with O-ring.
GRF Flanged Junction Unilets
GRF junction unilets are similar in design
and size to GR junction unilets, except
they are supplied with a mounting
flange. The flanged surface has four
3/8" holes. Unilets are furnished with
externally threaded surface cover and
threaded hubs. When used with canopy
or hub style covers listed on page 8,
they are particularly well suited for
hanging pendant lighting fixtures.
Hub Size A
B
1/2, 3/4 and 1
2-5/16 5/8
3-3/4
C
D
E
5-3/8
F
3-3/8 3/8
See page 5 for other covers available. If no covers are desired, specify catalogue number with suffix “LC”, and deduct price of cover.
Form numbers indicate sizes of unilets which take covers correspondingly classified.
99 Union Street
Elmira, Ontario N3B 3L7
January 2002
Master Index
Cat. No. Index
J Index
Master Index
Cat. No. Index
J Index
January 2002
CSA Approved
Class I, Div. 1 and 2
Groups B, C, D;
Class I, Zone 1 and 2, IIB + H2 T6,
Class II, Div. 1 and 2
Groups E, F, G;
Class III, Enclosure 3
J-5
Covers for GR and GRF
Conduit Outlet Boxes
Covers and O-rings fit bodies with corresponding form numbers.
Cover
Type
Cover
Opening
(Inches)
Fixture
Stem Size
(Inches)
Catalogue Number
Form
No.†
Malleable Iron
Aluminum
Surface
3.38
3.94
4.88
1
2
3
GRK-1M
GRK-2M
GRK-3M
GRK-1
GRK-2
GRK-3
Sealing
3.38
3.94
4.88
1
2
3
GRK-1SC
GRK-2SC
GRK-3SC
GRK-1SC-A
GRK-2SC-A
GRK-3SC-A
3.38
1
Dome
2" deep
GRK-1DC
Union Hub 3.38
3/4
1
GRK-75U
GRK-75UA
Hub
3.38
3.38
1/2
3/4
1
1
GRK-50
GRK-75
GRK-50-A
GRK-75-A
Canopy
3.38
3.38
3.38
1/2
3/4
1
1
1
1
GRK-50C
GRK-75C
GRK-100C
1
2
3
GRG-1
GRG-2
GRG-3
Length
4 1/2"
O-Rings—Neoprene
Provide Raintight fit when used on
following series: GR (Forms 1, 2 and 3),
GRF (Form 1), GRH and GRU (Form 1).
GRTB Terminal Strip
For use in standard GR series boxes Weidmuller type MK terminal Block*
with wire range of #22-#12 AWG. Mounts on 2 predrilled and tapped
standard holes (furnished in internal GR boxes).
6 position terminal block kit
6 position terminal block kit
12 position terminal block kit
1+2
3
3
GRTB6-12
GRTB6-3
GRTB12-3
*Terminal block is UL Listed for 300 volts, 25 ampere. CSA certified for 300 volts, 13 ampere.
†Form numbers designate cover and matching body sizes.
Master Index
January 2002
J Index
Cat. No. Index
99 Union Street
Elmira, Ontario N3B 3L7
J-6
CSA Approved
Class I, Div. 1 and 2
Groups B, C, D;
Class I, Zone 1 and 2, IIB + H2 T6,
Class II, Div. 1 and 2
Groups E, F, G;
Class III, Enclosure 3
Cat. No. Index
Master Index
December 2004
J Index
GRUE-100 Universal Junction Box:
Explosion-Proof and Dust-Ignition-Proof
Unilets® for 1/2", 3/4" and 1" threaded metal conduit.‡
Hub
Size
Hub
Configuration
Catalogue Number
Ferrous Alloy
Aluminum
GRUE-100 Universal Junction Box
Furnished with internally
threaded surface cover, five
threaded hubs and three
close-up plugs.
1/2
3/4
1
XB
GRUE-50
GRUE-75
GRUE-100
GRUE-50-A
GRUE-75-A
GRUE-100-A
GRUC-SC-F
GRUC-SC
GRUE Sealing Cover
Sealing cover for GRUE-100 and
GRUE-100N junction boxes
listed above.
To order GRUE-100 and GRUE-100N
complete with sealing cover add
suffix -SC.
GRUE-100/GRUE-100N Dimensions:
Hub Size
1/2
3/4
1
H
3/4
1.9cm
3/4
1.9cm
7/8
2.2cm
‡ To order GRUE Universal Junction Boxes for 1-1/4", 1-1/2" and 2", see next page.
99 Union Street
Elmira, Ontario N3B 3L7
December 2004
Master Index
Cat. No. Index
J Index
Master Index
Cat. No. Index
J Index
January 2002
CSA Approved
Class I, Div. 1 and 2
Groups B, C, D;
Class I, Zone 1 and 2, IIB + H2 T6,
Class II, Div. 1 and 2
Groups E, F, G;
Class III, Enclosure 3
J-7
GRUE-200 Universal Junction Box:
Explosion-Proof, Dust-Ignition-Proof
Unilets® for 1 1/4", 1 1/2" and 2" threaded metal conduit.
Hub
Size
Hub
Configuration
Catalogue Number
Ferrous Alloy
Aluminum
GRUE-200 Universal Junction Box
Furnished with internally threaded
surface cover. Entries are
supplied as listed.
Master Index
January 2002
J Index
Cat. No. Index
1-1/4
1-1/2
2
C
GRUE-125C
GRUE-150C
GRUE-200C
GRUE-125C-A
GRUE-150C-A
GRUE-200C-A
1-1/4
1-1/2
2
CB
GRUE-125CB
GRUE-150CB
GRUE-200CB
GRUE-125CB-A
GRUE-150CB-A
GRUE-200CB-A
1-1/4
1-1/2
2
E
GRUE-125E
GRUE-150E
GRUE-200E
GRUE-125E-A
GRUE-150E-A
GRUE-200E-A
1-1/4
1-1/2
2
L
GRUE-125L
GRUE-150L
GRUE-200L
GRUE-125L-A
GRUE-150L-A
GRUE-200L-A
1-1/4
1-1/2
2
LB
GRUE-125LB
GRUE-150LB
GRUE-200LB
GRUE-125LB-A
GRUE-150LB-A
GRUE-200LB-A
1-1/4
1-1/2
2
T
GRUE-125T
GRUE-150T
GRUE-200T
GRUE-125T-A
GRUE-150T-A
GRUE-200T-A
1-1/4
1-1/2
2
TB
GRUE-125TB
GRUE-150TB
GRUE-200TB
GRUE-125TB-A
GRUE-150TB-A
GRUE-200TB-A
1-1/4
1-1/2
2
X
GRUE-125X
GRUE-150X
GRUE-200X
GRUE-125X-A
GRUE-150X-A
GRUE-200X-A
1-1/4
1-1/2
2
XB
GRUE-125XB
GRUE-150XB
GRUE-200XB
GRUE-125XB-A
GRUE-150XB-A
GRUE-200XB-A
99 Union Street
Elmira, Ontario N3B 3L7
J-8
CSA Approved
Class I, Div. 1 and 2
Groups B, C, D;
Class I, Zone 1 and 2, IIB + H2 T6,
Class II, Div. 1 and 2
Groups E, F, G;
Class III, Enclosure 3
Cat. No. Index
Master Index
January 2002
J Index
GRSS Conduit Outlet Boxes with
Multiple Hubs, Explosion-Proof,
Dust-Ignition-Proof
UNILETS® for use with threaded metal conduit. Furnished with internal
ground screw.
Box
Type
Conduit
Size (In.)
Cover Opening
(Inches)
Hubs
Plugs
Catalogue Number
Aluminum
GRSS Outlet Box with Cover
Internally threaded aluminum bodies with externally threaded aluminum form 1
covers. Has 7 hubs; 2 on each of the sides, 1 on the top, 1 on the bottom and
1 on the centre in the back. Furnished with 4 close-up plugs
GRSS
1/2
3/4
1
3.38
3.38
3.38
7
7
7
4
4
4
GRSS50
GRSS75
GRSS100
GRSSA Outlet Box with Cover
Internally threaded aluminum bodies with externally threaded aluminum form 1
covers. Has 13 hubs; 2 on each side, 2 each on top and bottom and 5 in the back.
Furnished with 5 close-up plugs
GRSS
1/2
3/4
3.38
3.38
13
13
5
5
GRSSA50
GRSSA75
Dimensions
*In Group B atmospheres, all conduit runs must have a sealing fitting (not supplied) field installed adjacent to the enclosure.
99 Union Street
Elmira, Ontario N3B 3L7
January 2002
Master Index
Cat. No. Index
J Index
Master Index
Cat. No. Index
J Index
January 2002
CSA Approved
Class I, Div. 1 and 2
Groups B, C, D;
Class I, Zone 1 and 2, IIIB + H2 T6,
Class II, Div. 1 and 2
Groups E, F, G;
Class III, Enclosure 3
J-9
ELBY Capped Elbows
for Junction Unilets:
Explosion-Proof, Dust-Ignition-Proof
and Weather Resistant
Capped Elbows with Threaded Cover
Class I, Groups B, C & D; Class II, Groups E, F & G; and
Class III; CSA Encl.3.
Pulling elbows have been designed for
wiring in hazardous locations. Compact,
they have an externally threaded cover
opening. The 45° angle of the opening
to the large wiring chamber allows conductors to be pulled through the unilet.
Size
1/2
3/4
1
1-1/4
A
1-7/16
1-7/16
1-7/8
2-15/16
B
2-7/8
3
3-5/8
4-1/2
C
D
2-17/32
2-5/8
2-3/8
3-3/16
1-7/16
1-7/16
1-3/4
2-1/8
Size (inches)
Catalogue Number
Aluminum†
Ferrous Alloy
1/2
3/4
1
1-1/4
ELBY-50A
ELBY-75A
ELBY-100-A
ELBY-125-A
ELBY-50
ELBY-75
ELBY-100
ELBY-125
*Nominal diameter of unilet opening. Cadmium finish. †Copper free (Max. 4/10 of 1% copper content).
Master Index
January 2002
J Index
Cat. No. Index
99 Union Street
Elmira, Ontario N3B 3L7
J-10
CSA Approved
Class I, Div. 1 and 2
Groups C, D;
Class I, Zone 1 and 2, IIB T6,
Class II, Div. 1 and 2
Groups E, F, G;
Class III, Enclosure 3
Master Index
January 2002
J Index
GRJ Junction Unilets:
Explosion-Proof, Dust-Ignition-Proof
and Weather Resistant (Raintight)
Applications
• The Appleton GRJ unilet has been
designed to meet the demand for a
very small round unilet for general
wiring purposes in hazardous areas.
Hub
Size
1/2
and
3/4
Features
• Bodies have external threads around
cover opening, and the covers are
threaded internally. Unilet opening is
2-1/8".
Illustration
Cat. No. Index
Catalogue
Number
A
B
2-7/8
2-5/16
Description
C
D
E
F
1-15/16 2-1/4
3-15/16 11/16
STD.
PKG.
WT. LBS.
Per 100
Furnished with internally threaded surface cover
GRJC50
GRJC75
GRJC
1/2
3/4
5
5
153
150
GRJCA50
GRJCA75
GRJCA
1/2
3/4
5
5
173
160
1/2
3/4
5
5
160
144
GRJEA50
GRJEA75
Includes a rear hub.
GRJEA
Includes a rear hub.
GRJL50
GRJL75
GRJL
1/2
3/4
5
5
156
150
GRJT50
GRJT75
GRJT
1/2
3/4
5
5
178
175
GRJTA50
GRJTA75
GRJTA
1/2
3/4
5
5
180
180
1/2
3/4
5
5
192
200
GRJX50
GRJX75
Includes a rear hub.
GRJX
Cadmium Finish. See page 11 for other covers available.
99 Union Street
Elmira, Ontario N3B 3L7
January 2002
Master Index
Cat. No. Index
J Index
Master Index
J Index
J-11
Cat. No. Index
December 2006
CSA Approved
Class I, Div. 1 and 2
Groups C, D;
Class I, Zone 1 and 2, IIB T6,
Class II, Div. 1 and 2
Groups E, F, G;
Class III, Enclosure 3
Illustration
GRJ Covers and GRJS
Universal Unilets and Covers:
Explosion-Proof, Dust-Ignition-Proof
and Weather Resistant (Raintight)
Catalogue
Number
STD.
PKG.
Description
WT. LBS.
Per 100
Covers for GRJ Junction Unilets
Furnished with internal threads.
GRJK-S
Surface Cover
5
45
GRJK-SC
Sealing Cover
5
70
GRJS Universal Junction Unilets and Covers
Applications
• The Appleton GRJS Universal Junction Unilet is ideal for use in hazardous
locations.
Features
• The Unilet has five threaded hubs,
one in each of four sides and one
in bottom. Three close-up plugs are
furnished. Unilet opening is 2-9/16".
Illustration
Catalogue
Number
Hub Size A
B
C
D
E
1/2, 3/4
and
1
2-5/8
3-3/4
3-3/4
1
3-1/16
STD.
PKG.
Description
WT. LBS.
Per 100
GRJS Universal Junction Unilets
Furnished with externally threaded blank surface cover and three close-up plugs.
GRJS50
GRJS75
GRJS100
1/2
3/4
1
5
5
5
255
250
234
Supplied with O-Ring. Add suffix -A for aluminum
Covers for GRJS Universal Junction Unilets
Furnished with internal threads.
Master Index
J Index
GRJSK
Surface Cover
5
30
GRJSK-SC
Sealing Cover
5
38
GRJSK-50
1/2" Hub Cover
5
70
December 2006
Cat. No. Index
99 Union Street
Elmira, Ontario N3B 3L7
J-12
CSA Approved
Class I, Div. 1 and 2
Groups C, D;
Class I, Zone 1 and 2, IIB T6,
Class II, Div. 1 and 2
Groups E, F, G;
Class III, Enclosure 3
Cat. No. Index
Master Index
January 2002
J Index
CPU Universal Outlet Box:
Explosion-Proof and Dust-Ignition-Proof
Description
Hub Size
Fixture
Stem Size
Aluminum*
Ferrous Alloy
CPU20A
CPU20
CPU Box with blank cover
Furnished with cover screws,
four 3/4" universal hubs,
four 3/4" to 1/2" reducers and
three 1/2" close-up plugs.
1/2" or 3/4"
To order with CB205 connection block installed add suffix -CB.
CPU Box with hub cover (Supports lbs – 112.5 kg)
Furnished with hub cover,
screws, four 3/4" universal
hubs, four 3/4" to 1/2" reducers
and three 1/2" close-up plugs.
1/2" or 3/4"
1/2" or 3/4"
1/2"
3/4"
CPU20-50A
CPU20-75A
CPU20-50
CPU20-75
To order with CB205 connection block installed add suffix -CB.
CPU covers only
(Form 20)
Furnished with fastening screws.
Blank
Hub
Hub
—
1/2"
3/4"
CPSK20B-A
CPSK20-50A
CPSK20-75A
CPSK20B
CPSK20-50
CPSK20-75
CPU replacement connection block
With fastening strap and two mounting screws.
CB205
5 Wire - 20 Ampere - 300 Volt
To order with box - see above.
CPU Universal Outlet Box Dimensions:
45°
10-24
Ground
Screw
2.88"
(7.38cm)
4.81"
12.2cm)
.75”
(1.9 cm)
1/4–20 Thd.
4 Holes
10-24 Thd.
2 Holes
(on boxes with
suffix “CB” only)
5.56"
(14.1 cm)
1.84”
4.6 cm)
4.63”
11.8 cm)
3.75”
(9.5 cm)
7.38"
(18.7 cm)
6.38"
(16.2 cm)
5/16" Dia.
2 Holes
.31”
(.78 cm)
2.00”
(5.1 cm)
*Copper free (4/10 of 1%)
99 Union Street
Elmira, Ontario N3B 3L7
January 2002
Master Index
Cat. No. Index
J Index
Master Index
Cat. No. Index
J Index
January 2002
CSA Approved
Class I, Div. 1 and 2
Groups D;
Class I, Zone 1 and 2, IIB T6,
Class II, Div. 1 and 2
Groups E, F, G;
Class III, Enclosure 3
J-13
ER Junction Unilets:
Explosion-Proof, Dust-Ignition-Proof
and Weather Resistant (Raintight)
Applications
• ER Junction Unilets are ideally suited
for installations where space is restricted.
Hub
Size A
Features
• Their rectangular shape provides a
junction unilet as narrow as practical,
yet with ample wiring space.
• A ground surface contact between
unilet and cover insures a flame tight joint.
Illustration
1/2
3/4
Catalogue
Number
B
3-11/16 1-1/2
1
1-3/4
C
D
E
G
1-13/16 5
2-7/16 2-1/8 9/16
2
5-7/16 2-11/16 2-7/16 11/16
STD.
PKG.
Description
F
WT. LBS.
Per 100
Furnished with blank cover.
Master Index
January 2002
J Index
Cat. No. Index
ERC50
ERC75
ERC
1/2
3/4
10
25
158
200
ERLB50
ERLB75
ERLB
1/2
3/4
10
10
155
200
ERLL50
ERLL75
ERLL
1/2
3/4
10
25
158
205
ERLR50
ERLR75
ERLR
1/2
3/4
10
10
160
160
ERT50
ERT75
ERT
1/2
3/4
10
10
168
210
ERTB50
ERTB75
ERTB
1/2
3/4
25
25
175
210
99 Union Street
Elmira, Ontario N3B 3L7
J-14
Class I, Div. 1 and 2
Group D
Class II, Div. 1 and 2 Groups E, F, G
Class III
Cat. No. Index
Master Index
April 2006
J Index
EXB Cast Iron Junction Boxes:
Explosionproof, Dust-Ignitionproof,
Integrally Cast Mounting Feet
Drilled and tapped openings 1/2” thru 6” as specified.
Features: EXB Series
(Cast Iron)
• Wide selection of sizes and locations
for drilled and tapped openings.
• Cast iron box and cover with hot dip
galvanized finish.
• Extra wide, accurately ground
mating surfaces with closely spaced
stainless steel hex-head cap screws
assure a flame-tight joint.
• Provided with mounting lugs.
Standard Materials:
• EXB: cast iron bodies and covers.
Standard Finish:
• EXB cast iron bodies and covers:
hot-dip galvanized.
Compliances:
• UL Standard 886.
• CSA approved.
Factory Installed Options
Description
Suffix
Mounting Plate
Hinges
WYM*
HNG
* Refer to page C-14 for Mounting Plate
details.
Catalogue
Number♦
Nom. Inside
Dimensions
in Inches
LxWxD
Approx.
Side Wall
Thickness
in Inches
Max.
Conduit
Size
(In.)
Catalogue
Number♦
2
2
3-1/2
2
3-1/2
EXB040404
EXB060604
EXB060606
EXB080604
EXB080606
18x12x6
18x12x8
18x12x12
18x18x6
18x18x8
0.81
0.81
0.81
0.88
0.88
3-1/2
5
6
3-1/2
5
EXB181206
EXB181208
EXB181212
EXB181806
EXB181808
0.63
0.63
0.63
0.63
0.63
2
3-1/2
5
2
3-1/2
EXB080804
EXB080806
EXB080808
EXB100804
EXB100806
18x18x12
24x12x8
24x12x10
24x12x12
24x18x6
0.88
0.81
0.81
0.81
0.94
6
5
6
6
3
EXB181812
EXB241208
EXB241210
EXB241212
EXB241806
10x8x8
10x10x4
10x10x6
10x10x8
12x8x4
0.63
0.63
0.63
0.63
0.63
5
2
3-1/2
5
2
EXB100808
EXB101004
EXB101006
EXB101008
EXB120804
24x18x8
24x18x10
24x18x12
24x24x8
24x24x12
0.94
0.94
0.94
0.94
0.94
6
6
6
5
6
EXB241808
EXB241810
EXB241812
EXB242408
EXB242412
12x12x4
12x12x6
12x12x8
12x12x10
12x12x12
0.69
0.69
0.69
0.69
0.69
2
3-1/2
5
6
6
EXB121204
EXB121206
EXB121208
EXB121210
EXB121212
30x12x10
30x24x8
30x24x10
30x24x12
1.06
1.06
1.06
1.06
6
5
6
6
EXB301210
EXB302408
EXB302410
EXB302412
18x12x4
0.81
2
EXB181204
Nom. Inside
Dimensions
(Inches)
LxWxD
Approx.
Side Wall
Thickness
in Inches
Max.
Conduit
Size
(In.)
4x4x4
6x6x4
6x6x6
8x6x4
8x6x6
0.47
0.63
0.63
0.63
0.63
8x8x4
8x8x6
8x8x8
10x8x4
10x8x6
♦See EXB Ordering Information page for
drilling and tapping options.
Hinges (Malleable Iron, Hot Dip Galvanized)
99 Union Street
Elmira, Ontario N3B 3L7
EXB Box Size
Catalogue
Number
No. of Hinges
Per Set
Up to 12" x 12"
AHNG-22G
2
Up to 24" x 18"
AHNG-23G
2
Up to 30" x 12"
AHNG-24G
2
Larger than 30" x 12"
AHNG-34G
3
April 2006
Master Index
Cat. No. Index
J Index
Master Index
Cat. No. Index
J Index
April 2006
J-15
Ordering Information: EXB Boxes:
Blank Bodies for Drilling and Tapping
Determine catalogue number as follows:
(1) select EXB junction box catalogue
number; (2) select “Conduit Opening
Arrangement Diagram” number; and
(3) select symbols that represent conduit
opening sizes from “Symbol Table.”
Where no opening is required, the
symbol 0 must be inserted. Add
Suffix for other optional features.
The various divisions of the complete
catalogue number should be separated
by dashes.
Example:
The junction box selected is
EXB181208 with steel mounting plate
and the “Conduit Opening Arrangement” is diagram #1. Opening “a” is
to be 1/2"; “b”, 1-1/4"; “c”, no opening
needed; and “d”, 1-1/2".
In this example, the complete
catalogue number is:
EXB181208—1—AD0E—WYM-1812-1
Minimum Recommended Spacing Between Conduit Openings
Allowance made for clearance over bushings. When unions or seals are used,
additional space must be allowed.
Table shows minimum distances between conduit-opening centerlines in various
size combinations. For example, if 1-1/2" and 3/4" openings are to be drilled
and tapped into one side of box, the minimum spacing between centerlines
would be 2.13".
Conduit
Size (Inches)
1/2
Minimum space between conduit opening centerlines, Inches
3/4
1
1-1/4 1-1/2 2
2-1/2 3
3-1/2 4
1/2
3/4
1
1-1/4
1-1/2
2
2-1/2
3
3-1/2
4
1.25
1.38
1.56
1.88
2.00
2.38
2.50
2.88
3.13
3.44
1.50
1.69
2.00
2.13
2.50
2.63
3.00
3.25
3.56
1.88
2.19
2.31
2.69
2.81
3.19
3.44
3.75
2.44
2.63
2.94
3.13
3.44
3.75
4.05
2.75
3.13
3.25
3.63
3.88
4.19
3.44
3.63
3.94
4.25
4.56
3.75
4.13
4.38
4.69
4.44
4.75
5.06
5.00
5.31
5.63
Diameters of Bushings, Unions, Conduit and Seals in Inches
Standard Conduit Opening
Arrangement Diagrams
Opening “a” is always TOP of box.
Diag.
#1
Diag.
#2
Conduit
Size (Inches)
1/2
Diameters of Fittings for 1/2" thru 4" Conduit
1-1/4 1-1/2 2
2-1/2 3
3-1/2
3/4 1
4
BBU Bushing
BU Bushing
UNY/UNF (R) Union
Conduit
EYM-EYF Seals T.R.
1.06
1.13
1.50
.88
1.06
1.31
1.25
1.75
1.06
1.19
4.88
5.06
6.50
4.50
3.69
1.56
1.63
2.00
1.38
1.38
1.94
2.06
2.81
1.69
1.75
2.19
2.31
3.06
1.94
2.06
2.69
2.94
3.75
2.38
2.31
3.19
3.25
4.94
2.88
2.69
3.88
3.88
5.44
3.50
3.13
4.38
4.56
5.94
4.00
3.44
†T.R. is Turning Radius.
Diag.
#3
All Conduit Openings will be located
in centerline of walls and evenly
spaced unless otherwise specified.
If a “Standard Conduit Opening
Arrangement” is not suitable for the
application,or when openings are to
be more accurately spaced, submit
drill and tap schedule on page J-18.
Diag.
#4
Symbol Table
Drilling and Tapping (Five Threads Min.)
Size (in)
Symbol
Size (in)
Symbol
Blank
1/2
3/4
1
1-1/4
1-1/2
0
A
B
C
D
E
2
2-1/2
3
3-1/2
4
5
6
Master Index
April 2006
J Index
Cat. No. Index
F
G
H
J
K
L
M
99 Union Street
Elmira, Ontario N3B 3L7
J-16
Cat. No. Index
Master Index
April 2006
J Index
CSA Approved
Class I, Div. 1 and 2
Groups D;
Class I, Zone 1 and 2, IIA T6,
Class II, Div. 1 and 2
Groups E, F, G;
Class III
ELBD 90° Pulling Unilets:
Explosion-Proof, Dust-Ignition-Proof
and Weather Resistant
Applications
• Appleton ELBD Pulling Units have
been designed for hazardous area
wiring of motors, panel boards, circuit
breakers and other applications.
ease and no damage to the insulation
of the cable.
• An all new exclusive Appleton design
has been incorporated into the 2-1/2"
through 4" sizes. Rollers have been
built into each end of the wiring chamber located so that any resistance
caused by bending forces when the
cable is pulled through the Unilet are
eliminated. Large conductor cables
have an unrestricted movement with
no damage to insulation.
Features
• The problems of bending stiff lead
covered cables or large conductors
have been solved — the angle of the
opening to the large wiring chamber
allows heavy conductors to be pulled
through the ELBD Pulling Unilet with
Class I, Group D; Class II, Groups E, F and G and Class III
• Appleton ELBD Unilets feature a re-
versible dome cover which is bolted
to the unilet body with extra hexagon
bolts having a screwdriver slot.
• Both the cover and the unilet
body surface are ground to meet the
requirements for hazardous locations.
All hubs are chamfered.
Standard Materials
• ELBD Pulling Unilets: made of malleable iron with cadmium finish.
Cover
Roller
Roller
ELBD Pulling Elbow being used to house
conductors that supply power to an
electrical motor within a hazardous area.
ELBD Pulling Unilet showing cover removed. Note
exclusive roller feature in each end of wiring
chamber.
Type and size (inches)
Catalogue Number
Aluminum
Ferrous Alloy
1/2
3/4
1
1-1/4
1-1/2
2
ELBD-50-A
ELBD-75-A
ELBD-100-A
ELBD-125-A
ELBD-150-A
ELBD-200-A
ELBD-50
ELBD-75
ELBD-100
ELBD-125
ELBD-150
ELBD-200
ELBD-250-A
ELBD-300-A
ELBD-350-A
ELBD-400-A
ELBD-250
ELBD-300
ELBD-350
ELBD-400
2-1/2
3
3-1/2
4
Patented Roller Feature–
Listings in Bold Type
Dimensions of ELBD 90° pulling unilets
Catalogue
Number
99 Union Street
Elmira, Ontario N3B 3L7
Hub
Size
A
B
C
D
E
F
ELBD-50
ELBD-75
ELBD-100
ELBD-125
ELBD-150
ELBD-200
1/2
3/4
1
1-1/4
1-1/2
2
5-1/16
5-1/16
7-7/8
7-7/8
10-5/8
10-5/8
2-19/32
2-19/32
3-7/16
3-7/16
4-13/16
4-13/16
4-1/2
4-1/2
5
5
6-3/4
6-3/4
1-1/16
1-1/16
1-3/4
1-3/4
2-9/16
2-9/16
4-11/16
4-11/16
7-1/2
7-1/2
10-11/16
10-11/16
2-11/16
2-11/16
3-15/16
3-15/16
4-15/16
4-15/16
ELBD-250
ELBD-300
ELBD-350
ELBD-400
2-1/2
3
3-1/2
4
14-11/16 6-19/32 9-1/4
14-11/16 6-19/32 9-1/4
28-1/4
7-1/2 12-3/4
28-1/4
7-1/2 12-3/4
3-3/4
3-3/4
4-5/8
4-5/8
13-13/16
13-13/16
27-9/16
27-9/16
6-11/16
6-11/16
7-3/8
7-3/8
April 2006
Master Index
Cat. No. Index
J Index
Master Index
Cat. No. Index
J Index
April 2006
CSA Approved
Class I, Div. 1 and 2
Groups A, B, C, D;
Class I, Zone 1 and 2, IIC T6,
Class II, Div. 1 and 2
Groups E, F, G;
Class III, Enclosure 4
J-17
DER and GUB Junction Unilets:
Explosion-Proof, Dust-Ignition-Proof
and Watertight
Furnished with surface cover and mounting lugs.
Catalogue Number
Ferrous Alloy
DER1C
GUB1C
GUB2C
GUB3C
DER1C
Catalogue
Number
Outside Dimensions
Cover Dia.
5-1/8 x 5-1/8 x 4-1/16
7 x 7 x 6-1/2
10-5/8 x 9-1/4 x 6-3/4
12-7/16 x 12-7/16 x 8-7/16
3-7/8
5-3/8
7-3/16
9-13/16
Aluminum**
DER1CA
GUB1CA
GUB2CA
GUB3CA
Maximum size and number of entries supplied on any one side
1/2
3/4
1
1-1/4 1-1/2
2
2-1/2
3
3-1/2
4
Drilled and Tapped - With clearance for conduit seals
GUB1C
DER1C
GUB1C
GUB2C
GUB3C
3
4
4
4
2
4
4
4
2•
4
4
4
1•
2
3
3
—
2
3
3
—
1
2
2
—
—
2•
2
—
—
—
—
—
—
—
—
—
—
—
—
2•
4
4
4
1•
2
3
3
—
2
3
3
—
—
2
2
—
—
1•
1
—
—
—
—
—
—
—
—
—
—
—
—
With UNY Male Unions
DER1C
GUB1C
GUB2C
GUB3C
GUB2C
3
3
4
4
2
3
4
4
Maximum entry in back
GUB1C - 2"; GUB2C - 2"; GUB3C - 6"
GUB3C
•To order DER1C or DER1CA without mounting lugs add the suffix “LF” to the catalogue number.
**Copper free aluminum - Maximum copper content 4/10 of 1%. *Requires pad. Available on special order from factory only.
Master Index
April 2006
J Index
Cat. No. Index
99 Union Street
Elmira, Ontario N3B 3L7
J-18
Cat. No. Index
Master Index
April 2006
J Index
DER and GUB Junction Unilets
with Surface Cover:
Explosion-Proof, Dust-Ignition-Proof
and Watertight
CSA Approved
Class I, Div. 1 and 2
Groups A, B, C, D;
Class I, Zone 1 and 2, IIC T6,
Class II, Div. 1 and 2
Groups E, F, G;
Class III, Enclosure 4
Determining Catalogue Numbers
• To determine the catalogue number of Unilets with entries,
the following information should be shown:
1) Unilet catalogue number from listings on page 18.
2) Sketch number of hub arrangement selected from the
illustration below.
3) Entry symbols taken from the table shown below. Start
from the left (at Hub “A”) on the top of the unilet and
continue in rotation clockwise around its body. Where no
entry is required, the symbol X should be inserted. The
three various divisions of the catalogue number should be
separated by dashes.
Example
GUB2C Unilet is required with threaded conduit entries and
unions. The arrangement of entries is per sketch #16. “A”
is to be 2" drilled and tapped entry; B—1-1/4", C—Blank (no
entry); D—2"; E—Blank; F—1" and J—Blank.
The catalogue number is: GUB2C-16-64X634X.
Unions are required at B (1-1/4") and D (2"). Order UNY male
unions from section I, page 5 (UNY125NR for B; UNY200NR
for D).
Conduit Entry Symbols
Drilling and Tapped or
Threaded Hubs
Size
Symbol Size
1/2
3/4
1
1-1/4
1-1/2
1
2
3
4
5
Union Hubs (GUB4 only)
Symbol Size
2
2-1/2
3
3-1/2
4
6
7
8
9
10
1/2
3/4
1
1-1/4
1-1/2
Symbol
Size
1E
2E
3E
4E
5E
2
2-1/2
3
3-1/2
4
1
2
3
4
5
6
7
8
9
10
11
A
A
A
A
A
A
A
A
A
A
A
B
B
B
D
B
C
12
13
A
A
E
14
A
15
B
J
A
B
16
B
A
B
E
D
H
A
C
C
C
G
D
H
C
D
23
24
25
26
27
28
29
A
A
A
ABC
ABC
ABCD
A
B
J
J
M
L
K
J
C
D
CBA
FED
D
E
F
JHG
E
G
C
B
F
D
J
M
C
F
E
20
A B
J
D
B
19
B
C
E
J
18
B
J
D
C
B
C
17
A
J
D
J
C
F
B
J
C
E
D
J
M
L
K
J
A
B
B
30
C B
C B
21
22
A
B
E
C
C
C
D
31
32
A B
A B
33
A
B
H
J
C
J
G
F
KJHG
A
B
J
E
L
B A
6E
7E
8E
9E
10E
J
C
D
E
F
H G
Symbol
B A
D
F
E
Top*
Side*
Back
Send sketch and description for other arrangements.
Front
99 Union Street
Elmira, Ontario N3B 3L7
Bottom
*GUB2C - Top and bottom measures 9-1/4 x 5-1/2 and sides measure 10-5/8 x 5-1/2.
April 2006
Master Index
Cat. No. Index
J Index
Master Index
Cat. No. Index
J Index
April 2006
CSA Approved
Class I, Div. 1 and 2
Groups A, B, C, D;
Class I, Zone 1 and 2, IIC T6,
Class II, Div. 1 and 2
Groups E, F, G;
Class III, Enclosure 4
Applications
• Suitable for use in hazardous locations.
Features
• Surface covers furnished with DER
and GUB junction unilets have lugs to
take a bar or wrench. Other style covers,
as listed below, are available.
• Sealing covers have a plugged hole
through which the unilet can be filled
J-19
DER and GUB Junction Unilet Covers
Furnished with external threads.
with sealing cement after installation.
See section I for information regarding
sealing cement. Note: When sealing
covers are used, splices or taps
within the unilets are prohibited by the
CEC.
• Dome covers permit conductors to
be pulled in with the ends extending
Catalogue
Number
GRK-2
GUBK-1
GUBK-2
Type of
Unilet
well out beyond unilet body where
splices can easily be made.
• The splices need not be crowded
back into the unilet, but can be left as
is when dome cover is used for their
enclosure and protection.
Nominal
Depth
Inside
Diameter
Std.
Pkg.
Wt. Lbs.
Per 100
Surface Covers
GRK-2C
DER1C
GUBK-1C
GUB1C
GUBK-2C
GUB2C
GUBK-3C
GUB3C
—
—
—
—
3-9/16
4-5/8
6-1/4
8-7/8
1
1
1
1
75
150
325
625
Sealing Covers
GRK-2SC
DER1C
—
3-9/16
1
176
DER and GUB unilets are furnished with surface covers. Order the remaining above listed covers as follows: Specify unilet
catalogue number from the listings on pages 18 thru 21, this section, and the catalogue number of the cover required from
the listings above.
Example: GUB-2-16-64EX63E4EX (see example from page 19), except with GUBK-2-6 dome cover.
DER Form 1 and GR Form 2 have the same cover opening.
Master Index
April 2006
J Index
Cat. No. Index
99 Union Street
Elmira, Ontario N3B 3L7
J-20
Cat. No. Index
Master Index
April 2006
J Index
GUBM Instrument Unilets:
Explosion-Proof, Dust-Ignition-Proof
and Weather Resistant (Raintight)
CSA Approved
Class I, Div. 1 and 2
Groups A, B, C, D;
Class I, Zone 1 and 2, IIC T6,
Class II, Div. 1 and 2
Groups E, F, G;
Class III, Enclosure 4
Applications
• Appleton GUBM instrument unilets
provide enclosures for meters, gauges
or other similar devices in hazardous
locations.
Features
• A heavy, round, explosion-proof
glass window in the threaded cover
permits direct reading of the enclosed
instrument.
Illustration
• These unilets have mounting lugs
and are furnished with a 3/4" threaded
entry for rigid conduit.
drilled and tapped on proper centres
for instruments to be used. No other
means of instrument fastening is included in the list price. Instrument
mounting plates or brackets can be
furnished. On receipt of complete
instrument dimensions, prices will be
quoted. Call factory for details.
Ordering Information
• Other hub arrangements and sizes
are available. Prices on application.
Mounting bosses are provided in the
bottom of the unilet which can be
Catalogue
Number
Type
unilet
Hub
size
Cover
opening*
Mtg.
lugs
GUBM-1C
GUB-1C
3/4
5-3/8
2
3/4
7-3/16
2
For Copper-free• aluminum add suffix -A.
GUBM-2C
GUB-2C
For Copper-free• aluminum add suffix -A.
Dimensions of GUBM Unilets
Catalogue
Number
Mtg.
Lugs
A
B
C
D
E
F
G
Dia.
H
Dia.
J
K
Dia.
L
GUBM-1C
2
7"
7"
6-1/2"
5-1/2"
8-1/4"
6"
3-5/8"
5-3/8"
4-5/8"
1/2"
2-1/16"
GUBM-2C
2
5-5/8"
10-3/8"
9-19/32"
5"
7-5/16"
4-3/8"
1/2"
2-1/16"
9-17/64" 10-19/32" 6-23/32"
*Nominal diameter of Cover opening.
• Maximum Copper Content 4/10 of 1%.
99 Union Street
Elmira, Ontario N3B 3L7
April 2006
Master Index
Cat. No. Index
J Index
Master Index
Cat. No. Index
J Index
April 2006
J-21
Dimensions: DER and GUB Unilets
Explosion-Proof, Dust-Ignition-Proof
and Weather Resistant (Raintight)
CSA Approved
Class I, Div. 1 and 2
Groups A, B, C, D;
Class I, Zone 1 and 2, IIC T6,
Class II, Div. 1 and 2
Groups E, F, G;
Class III, Enclosure 4
DER1C (2 lugs)
GUB1C (2 lugs)
GUB2C (2 lugs)
Type
Unilet
DER1C
GUB1C
GUB2C
GUB3C
A
5-1/8
7
9-1/4
12-7/16
B
5-1/8
7
10-5/8
12-7/16
C
D
E
4-3/8
5-3/4
8-1/8
10-15/16
3-29/32
5-13/32
7-1/4
9-7/8
3-29/32
7-3/16
7-3/16
9-7/8
Master Index
April 2006
J Index
Cat. No. Index
All Types
GUB3C (4 lugs)
F
4
6
9-19/32
9
G
6
8-1/4
10-3/8
14
H
5/16
1/2
1/2
5/8
J
K
L
M
N
4-1/16
6-3/8
6-5/8
8-1/8
2-7/16
3-13/16
3-15/16
4-7/16
3-1/4
5-1/32
5-7/32
6-3/16
2-5/16
4-5/8
5-1/16
5-5/8
4-1/2
6-3/16
8
10-3/4
O
—
—
—
7
T
—
—
—
7
U
7
9-1/4
11-3/8
14-15/16
Z
—
1/8
1/8
5/16
99 Union Street
Elmira, Ontario N3B 3L7
J-22
Cat. No. Index
Master Index
April 2006
J Index
Dimensions: DER and GUB Unilets
-Continued
CSA Approved
Class I, Div. 1 and 2
Groups A, B, C, D;
Class I, Zone 1 and 2, IIC T6,
Class II, Div. 1 and 2
Groups E, F, G;
Class III, Enclosure 4
Dimensional Drawings on
preceding page 24
Type
Threaded Entries‡
DER1C
GUB1C
Top or Bottom Side 9-1/4" x 5-1/2"
GUB2C
GUB3C
Left or Right Side 10-5/8" x 5-1/2"
GUB2C
Entry
Size
P
Q
R
X
Y
AA
BB
1/2
3/4
1•
1-1/4•
1-7/16
1-7/16
1-7/16•
1-7/16•
1-3/16
1-3/16
1-3/16•
—
1-7/16
—
—
—
—
—
—
—
—
—
—
—
2
—
—
—
31/32
—
—
—
—
—
—
—
—
—
—
—
1/2
3/4
1
1-1/4
1-1/2
2
2-1/16
2-1/16
2-1/16
2-1/16
2-1/16
2-1/2
1-7/16
1-7/16
1-7/16
1-7/16
—
—
1-3/4
1-3/4
1-3/4
—
—
—
11/16
11/16
11/16 ■
—
—
—
1-3/8
1-3/8
1-1/8 ■
—
—
—
3-3/8
3-3/8
3-3/8
—
—
—
1-3/4
1-3/4
1-3/4
—
—
—
3-1/2
3-1/2
3-1/2 ■
—
—
—
1-11/16
1-11/16
1-11/16■
—
—
—
1/2
3/4
1
1-1/4
1-1/2
2
2-1/2•
2-1/16
2-1/16
2-1/16
2-1/16
2-1/16
2-5/8
2-5/8•
2-1/16
2-1/16
2-1/16
2-1/16
2-1/16
2-1/4
2-1/4•
2-13/16
2-13/16
2-13/16
2-13/16
2-13/16 ■
—
—
1
1
1
—
—
—
—
2
2
2
—
—
—
—
3-5/16
3-5/16
3-5/16
3-5/16
3-5/16 ■
—
—
2
2
2
2
2■
—
—
3-9/16
3-9/16
3-9/16
—
—
—
—
1-3/4
1-3/4
1-3/4
—
—
—
—
1/2
3/4
1
1-1/4
1-1/2
2
2-1/2
3-1/4
3-1/4
3-1/4
3-1/4
3-1/4
3-1/4
3-1/4
2-3/8
2-3/8
2-3/8
2-3/8
2-3/8
2-3/8
2-3/8•
3-1/4
3-1/4
3-1/4
3-1/4
3-1/4
—
—
1-3/16
1-3/16
1-3/16
—
—
—
—
2-3/8
2-3/8
2-3/8
—
—
—
—
3-7/8
3-7/8
3-7/8
3-7/8
3-7/8
—
—
2-11/16
2-11/16
2-11/16
2-11/16
2-11/16
—
—
2-11/16
2-11/16
2-11/16
—
—
—
—
3-7/8
3-7/8
3-7/8
—
—
—
—
1/2
3/4
1
1-1/4
1-1/2
2
2-1/2•
2-1/16
2-1/16
2-1/16
2-1/16
2-1/16
2-5/8
2-5/8•
2-1/16
2-1/16
2-1/16
2-1/16
2-1/16
2-1/4
2-1/4•
2-13/16
2-13/16
2-13/16
2-13/16
3-1/8
—
—
1
1
1
1-3/16*
—
—
—
2
2
2
2-5/16*
—
—
—
3-5/16
3-5/16
3-5/16
3-5/16
3-5/16
—
—
2
2
2
2
2
—
—
3-9/16
3-9/16
3-9/16
3-7/16*
—
—
—
1-3/4
1-3/4
1-3/4
1-7/8*
—
—
—
CC
DD
‡ Dimensions permit assembly of seals on adjacent conduit runs. ■Seals must be staggered for assembly on adjacent conduit runs.
• Requires pad. Available only on special order from factory. * Dimensions will not permit assembly of unions on adjacent conduit runs.
§ Dimensions permit assembly of unions on adjacent conduit runs.
Caution: Dimensions between hub centres are for use with hubs of the same size. These dimensions will not necessarily hold
true for a combination of hubs of extreme sizes. Please consult Engineering Dept. for special combinations of hubs.
99 Union Street
Elmira, Ontario N3B 3L7
April 2006
Master Index
Cat. No. Index
J Index
Master Index
Cat. No. Index
J Index
October 2008
J-23
GRU Conduit Outlet Boxes
with Union Hubs:
Explosion-Proof and Dust-Ignition-Proof
CSA Approved
Class I, Div. 1 and 2
Groups C and D;
Class II, Div. 1 and 2
Groups E, F, G;
Class III
NEMA 3, 4*
Unilets® for use with Threaded Metal Conduit.
Funished with Internal Ground Screw.
Box Type
Conduit
Size
(Inches)
Cubic
Inch
Capacity
Cover
Opening
(Inches)
Catalogue Number
Malleable Iron
Aluminum
GRU with Union Hubs
GRUT 1/2" thru 1" and GRUSE 1/2" thru 3/4" — Malleable iron externally threaded
body complete with internally threaded malleable iron surface cover.
GRUSE 1" — Copper-free aluminum cover and body with externally threaded cover.
GRUT50
GRUT
1/2
3/4
1
19
19
19
3.25
3.25
3.25
GRUT50
GRUT75
GRUT100
GRUSE
1/2
3/4
1
19
19
29
3.25
3.25
3.75
GRUSE50
GRUSE75
GRUSE50
GRUSE100
GRU Covers
Malleable iron with internal threads. Fit GRUT and GRUSE listed above†.
Surface
GRUK-S
3.25
* Applies to GRUSE100 only.
†Does not apply to GRUSE100.
GRUT
Dimensions
GRUT
GRUSE50 and GRUSE75
Dimensions in Inches
Hub Size
(Inches)
1/2
3/4
1
A
B
C
D
E
F
4.19
4.19
4.19
2.69
2.69
2.69
6.25
6.25
6.50
.75
.75
.94
8.25
8.25
8.75
2.31
2.31
2.31
1.9
1.9
2.4
21.0
21.0
22.2
5.9
5.9
5.9
Dimensions in Centimeters
1/2
3/4
1
10.6
10.6
10.6
6.8
6.8
6.8
15.9
15.9
16.5
GRUSE 1/2" and 3/4"
GRUSE100
Dimensions in Inches
8.00 min.
4.63
Hub Size
(Inches)
A
B
C
1/2 & 3/4 4.19 2.56 6.13
2.38 Ø3.75
4.63
D
.94
E
F
G
8.00 2.19 2.13
Dimensions in Centimeters
1/2 & 3/4 10.6 6.5 15.6
2.4
20.3
5.7
5.4
3.48
Master Index
October 2008
J Index
Cat. No. Index
99 Union Street
Elmira, Ontario N3B 3L7
J-24
Cat. No. Index
Master Index
October 2008
J Index
Wiring Capacity:
Explosion-Proof Conduit Outlet Boxes
Volume in Cubic Inches and Cubic Centimetres
Wiring Capacity
CPU
ER
Type
Size
CPU
Form 20
ER
GRJ
GRJS
GRK
GRU
Vol./cu. cm
21.0
344.1
1/2"
4.8
78.7
ER
3/4"
7.3
119.3
GR
Form 1
18.0
295.0
GR
Form 2
31.0
508.0
GR
Form 3 (1-1/2")
72.0
1179.9
Form 3 (2")
76.0
1245.4
GRF
All
18.0
295.0
GRJ
All
7.3
119.3
GRJS
All
12.5
204.8
GRK (Canopy)
-50°C, -75°C, -100°C
16.0
262.2
GRK (Dome)
1DC
6.0
98.3
GRU (Union Hubs)
1/2", 3/4"
19.0
311.4
GRUE
1/2", 3/4"
15.3
250.7
1"
18.5
303.2
GRSS
All
29.0
475.2
GRSSA
All
29.0
475.2
GR
GRF
Vol./cu. in.
GRUE-75
GRSS
ELBD 90° Pulling Unilets
Size
1/2
3/4
1
1-1/4
1-1/2
2
2-1/2
3
3-1/2
4
69.0
240.0
240.0
540.0
540.0
Capacity in Cubic Inches
ELBD
ELBD
7.0
25.0
25.0
69.0
Capacity in Cubic Centimetres
ELBD
99 Union Street
Elmira, Ontario N3B 3L7
7.0
114.7
114.7
409.7
409.7
1130.7 1130.7 3932.9 3932.9 8849.0 8849.0
October 2008
Master Index
Cat. No. Index
J Index