K-6
GUBB Series:
Class I, Div. 1 and 2,
Groups ifp»D
Class II, Div. 1 and 2,
Groups E,F,G
Class III
GUBB Cast Junction Boxes for Drilling
and Tapping. Explosion-Proof,
Dust-Ignition-Proof.
Drilled and tapped openings from 1/2" thru 4" as specified.
Cover
Catalog Number
Opening
Malleable
(Inches) Form No. Iront
Aluminum'
Size (Inches)
LxWxD
$ Malleable iron and aluminum boxes furnished with aluminum cover.
GROUP BANDC
SEALING REQUIREMENTS
Box
Group
Seals
Required*
GUBB
B,C
Yes
GUBB
7 x 6-1/2 x 6-3/8
5.38
1
GUBB-11 GUBB-11 A
0x8x6-9/16
7.19
2
GUBB-22 GUBB-22A
12 x 12 x 7-7/8
9.81
3
GUBB-33 GUBB-33A
* Shaded area indicates items also suitable for Groups B and C.
GUBB-11,11A (2 Lugs)
GUBB-22,22A (2 Lugs)
GUBB-33,33A (4 Lugs)
No
'Sealing fitting must be installed
within 2" of each conduit entrance (max. conduit for Group B
and C is 2").
H
Dimensions In Inches tlnside dimensions.
Cat. No.
GUBB-11
GUBB-11 A
A
B
Ct
Dt
E
F
G
H
J
K
L
M
N
U
7.00
5.50
5.94
5.38
6.00
7.75
.50
6.38
3.69
4.88
4.63
6.25
10.00
7.13
9.00
7.19
9.00
9.25
.50
6.56
3.50
4.63
4.63
8.00 10.25
12.00
10.75
10.75
9.88
10.00
13.13
.63
7.88
3.94
5.25
5.38
Dimensions in Centimeters flnside dimensions.
GUBB-11
16.5
17.8 14.0 15.1 13.7
GUBB-11 A
15.2
19.7
GUBB-22
GUBB-22A
20.3
25.4
18.1
22.9
18.3
22.9 23.5
GUBB-33
GUBB-33A
30.5
30.5
27.3
27.3
25.1 25.4
6 50
'
GUBB-22
GUBB-22A
80
GUBB-33
GUBB-33A
120
°
°
Effective October, 1993
Copyright 1993 Printed in U.S.A.
PAGE 6
33.3
11.00
8.75
14.38
1.3
16.2
9.4
11.8
11.8
15.9 22.2
1.3
16.7
8.9
11.4 11.8
15.9 26.0
1.6
20.0
10.0
11.1 13.7
27.9 36.5
1701 West Wellington Avenue
Chicago, Illinois 60657
K-2
Cast Junction Boxes:
Explosion-Proof, Dust-Ignition-Proof.
UNILETS® for Use with Threaded Metal Conduit.
Applications
• Explosion-Proof and Dust-IgnitionProof, for use in classified locations containing such gases as butane, gasoline,
hexane, naphtha, benzene, lacquer solvent vapors and alcohol.
• Corrosion-resistant— ideal indoors or
outdoors.
• Junction or pull box for pulling and
splicing of wires and as an enclosure for
electrical devices.
• Ideal where number and size of conductors require a junction box with additional space.
• Excellent for use in classified-area
wiring of motors, circuit breakers, panelboards, entrances to buildings, etc.
Features: All Boxes
• Provided with mounting lugs (except
DER).
• Furnished with covers.
• All conduit hubs and openings provide
a minimum of five full threads to meet
UL requirements.
• Accurately tapped, tapered conduit
threads provide tight, rigid joints and
ground continuity.
B
Features: GUB/GUBB Series
QWide selection of sizes and locations
for brazed threaded hubs or drilled and
tapped conduit openings.
• Suitable for use as an enclosure for
relays, instrument and other control apparatus in classified locations.
• Available in high tensile strength
malleable iron or copper-free aluminum
bodies.
• Smooth, rounded integral bushing in
every brazed hub protects conductor insulation.
• Provided with mounting lugs.
• O-Rings available for forms 1, 2 and
3 to provide raintight fit.
Features: GUBD Series (Dome
and Plate)
0 GUB junction boxes with dome
cover and mounting plate provide flexibility for a wide variety of applications.
• Ideal for housing relays, contactors,
terminal blocks and other classifiedarea applications.
• Mounting plate can be drilled to accommodate a variety of devices.
Effective October, 1993
Copyright 1993 Printed in U.S.A.
PAGE 2
1701 West Wellington Avenue
Chicago, Illinois 60657
K-3
Cast Junction Boxes:
Explosion-Proof, Dust-Ignition-Proof
UNILETS® for Use with Threaded Metal Conduit.
• Dome cover has nominal depth of 6"
to 17", depending upon box selected.
Provides significant increase in cu. in.
capacity.
• Smooth, rounded integral bushing in
every brazed hub protects conductor
insulation.
• O-Rings available to provide raintight fit.
• Provided with mounting lugs.
Features: GUBM Series
(Instrument)
© GUBM junction boxes serve as an
enclosure for meters, gauges and similar devices.
• Complete with round, explosion-proof
glass window cover. Permits direct
reading of enclosed instrument.
• Furnished with one 3/4" hub.
• Mounting bosses provided in back of
GUBM can be drilled and tapped for
fastening of instrument mounting
bracket.
• Smooth, rounded integral bushing in
every brazed hub protects conductor
insulation.
• O-Rings available to provide raintight fit.
• Provided with mounting lugs.
Features: DER Series
O Available with brazed hubs.
• Malleable iron bodies for high tensile
strength and ductility. Provides greater
resistance to impact, shock and corrosion.
• Smooth, rounded integral bushing in
every brazed hub protects conductor
insulation.
• O-Rings available to provide raintight fit.
• Function as sealing fittings when
used with sealing cover (see NEC for
restrictions).
Features: EJB Series
(Aluminum)
0 Furnished with O-rings in most
sizes—provides watertight fit.
• Cast copper-free aluminum box and
cover. Provides greater resistance to
certain types of corrosive atmospheres.
• Outboard ground joint cover opening
provides maximum usable space for
Effective October, 1993
Copyright 1993 Printed in U.S.A.
pulling wires and installing devices.
• Extra wide, accurately ground mating surfaces with closely spaced steel
hex-head cap screws with dichromate
finish assure a flame-tight joint.
• Provided with mounting lugs.
• Bosses are blind tapped as a provision for securing MP Mounting Plates.
• Two stud bolts with nuts furnished
on 12x12 and larger boxes. For use in
diagonally opposite corners of body to
aid in aligning cover (not furnished with
hinge cover).
• Hinge holes provided as standard on
12x12 and larger boxes.
Features: EXB Series (Cast
Iron)
O Wide selection of sizes and locations for drilled and tapped openings.
• Cast iron box and cover with aluminized 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
• DER, GUB, GUBB, GUBD: malleable iron bodies and copper-free aluminum covers.
• GUBM: malleable iron bodies with
copper-free aluminum and glass cover.
• EJB: copper-free aluminum bodies
and covers.
• EXB: cast iron bodies and covers for
sizes up to 30x12; 30x12 and larger
sizes in aluminum.
• Separate Covers:
DER Sealing Cover—malleable iron.
DER, GUB and GUBB Surface Covers
and GUB and GUBB Dome Covers—
aluminum.
Standard Finishes
• DER, GUB and GUBB malleable iron
bodies: triple-coat—(1) zinc electroplate, (2) dichromate, and (3) aluminum polymer enamel.
• DER, GUB and GUBB aluminum
covers and GUBB aluminum bodies:
aluminum polymer enamel.
• DER malleable iron sealing covers:
triple-coat—(1) zinc electroplate, (2)
dichromate, and (3) aluminum polymer
enamel.
Appleton
•
• ELECTRIC COMPANY
• EXB cast iron bodies and covers: hotdip galvanized.
• EJB aluminum bodies and covers:
natural finish.
Options: DER, GUB and GUBB
• O-Rings. Suffix—OR.
• Less Cover. Suffix —LC.
• Terminal Blocks. Information provided upon request (except DER-1).
• Instrument Mounting Plate and
Bracket for GUBM. Information provided upon request (submit complete
dimensions of instrument to be used).
Options: EXB and EJB
• Hinged Covers. Hinges on 12x12x8
and larger EJB boxes: Suffix —H.
EXB hinges: Information provided on
request.
• Mounting Plates. Mounting plates on
all EJB boxes: Suffix —MP.
EXB mounting plates: Information provided on request.
• Terminal Blocks. Information provided upon request.
Compliances
• UL Standard 886.
• Appleton malleable iron products
conform to ASTM A47-77, Grade
32510, which has the following properties: tensile strength, 50,000 psi;
yield, 32,000 psi; and elongation, 10%.
• Appleton aluminum products are
produced from a high strength copperfree (4/10 of 1% max.) alloy.
• Suitable for Class I, Div. 1 & 2, if installed in compliance with NEC 5014(a)(b) and for Class II, Div. 1 & 2, if
in compliance with NEC 502-4(a)(b).
1701 West Wellington Avenue
Chicago, Illinois 60657
PAGE 3
a
K-7
Ordering Information: GUBB Boxes;
Blank Bodies for Drilling and Tapping.
Determine catalog number as follows:
(1) select GUBB junction box catalog
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 catalog number should be separated by dashes.
Example
The junction box selected is GUBB-33
and the "Conduit Opening Arrangement" is diagram #1. Opening "a" is
to be 3/4"; "b", no opening required;
"c", 2"; and "d", 1-1/4.
In this example, the complete catalog
number is:
GUBB-33—1—BOFD
Standard Conduit Opening
Arrangement Diagrams
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
1/2
1.25
3/4
1.38
1
1.56
1.69
1.88
1-1/4
1.88
2.00
2.19
2.44
1-1/2
2.00
2.13
2.31
2.63
2.75
2
2.38
2.50
2.69
2.94
3.13
3.44
2-1/2
2.50
2.63
2.81
3.13
3.25
3.63
3.75
3
2.88
3.00
3.19
3.44
3.63
3.94
4.13
4.44
3-1/2
4
3.13
3.25
3.44
3.75
3.88
4.25
4.38
4.75
5.00
3.44
3.56
3.75
4.06
4.19
4.56
4.69
5.06
5.31
1.50
5.63
Diameters of Bushings, Unions, Conduit and Seals, Inches
Opening "a" is always TOP of box
Side
Minimum space between conduit opening centerlines, inches
3-1/2
4
1-1/4
1-1/2
2
2-1/2
3
3/4
1
Diameters of fittings for 1/2 thru 4' conduit
Conduit Size (Inches)
1/2
3/4
1
1-1/4
1-1/2
2
2-1/2
3
3-1/2
4
BBU Bushing
1.06
1.31
1.56
1.94
2.19
2.69
3.19
3.88
4.38
4.88
BU Bushing
1.13
1.25
1.63
2.06
2.31
2.94
3.25
3.88
4.56
5.06
UNY-UNF (R) Union
1.50
1.75
2.00
2.81
3.06
3.75
4.94
5.44
5.94
6.50
1.06
1.38
1.69
1.94
2.38
2.88
3.50
4.00
4.50
1.19
1.38
1.75
2.06
2.31
2.69
3.13
3.44
3.69
Conduit
EYM-EYF Seals T.R.t
.88
1.06
tTR. is turning radius.
Wall Thickness and Maximum Conduit Size, Inches
m
I k j
Symbol Table
Drilling and Tapping (Five Threads Win.)
Box
Type
Top, Bottom and Sides
Wall
Maximum
Thickness
Conduit Size
GUBB-11, GUBB-11A
GUBB-22, GUBB-22A
GUBB-33, GUBB-33A
.44
.44
.56
2
2
2
.44
.63
.81
Symbol
Blank
1/2
0
A
B
C
D
E
3/4
1
1-1/4
1-1/2
Size (In.)
Symbol
2
F
G
H
2-1/2
3
3-1/2
4
J
K
Back
Maximum
Conduit Size
2
4
4
All conduit openings will be located in centerline of walls and evenly spaced
unless otherwise specified.
Back
Top
Size (In.)
Wall
Thickness
If a "Standard Conduit Opening Arrangement" is not suitable for the ap- Front
plication, or when openings are to be
more accurately spaced, submit sketch,
locating openings (1) from centerlines
of box and (2) from outside back of box
(or from mounting lug surface if lugs are
supplied).
Top
Side
GUBB-11,22
GUBB-33
(also GUBB-11 A, 22A) (Also GUBB-33A)
Refer to Pricing Index for price,
weight, and standard package
Copyright 1984 Printed in U.S.A.
Effective Jan. 1984
1701 W. Wellington Ave.
Chicago, Illinois 60657
PAGE 7