Hubbell USF161210, USF121206, USF161206, USF161208, USF161606 Installation, Operation & Maintenance Data Sheet
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HUBBELL ELECTRICAL PRODUCTS
A Division of HUBBELL INCORPORATE D (Delaware)
INSTALLATION, OPERATION &
Zone Classified Hazardous Locations
General Safety Information:
CAUTION:
death.
Technical information, advice and recommendations contained in these documents is based upon information that Killark believes to be reliable.
determine the suitability of the product for his intended use, a nd assume s all risk and lia bil it y whatsoever in conn ect ion th er ew ith.
SERIES USF JUNCTI ON BOXES
3940 Dr. Martin Luther King Drive
St. Louis, Missouri 63113 USA
Increased Safety Terminal Enclosures For Use In
MAINTENANCE DATA SHEET
SERIES USF JUNCTION BOXES
Increased Safety Terminal Enclosures For Use
In Zone* Classified Hazardous Locations
0518 SIRA 14 ATEX 3157
IECEx SIR 14.0054
* - Suitable For Use In Division Classified Locations Based On
Equivalency - See North American Certification Ratings Below
Before installing, make sure you are compliant with area classifications, failure to do so may result in bodily injury, death and
property damage. Do not attempt installation until you are familiar with the following procedures. All installation must comply with
the applicable Electrical Code.
Make sure that the circuit is De-energized before starting installation or maintenance.
Verify that the installation is grounded. Failure to ground will create electrical shock hazards, which can cause serious injury and or
IMPORTANT:
Please read these instructions carefully before installing or maintaining this equipment. Good electrical practices should be followed
at all times and this data should be used as a guide only.
All the information and advice contained in these documents is intended for use only by persons having been trained and possessing the requisite
skill and know-how and to be used by such persons only at their own discretion and risk. The nature of these instructions is informative only and
does not cover all of the details, variations or combinations in which this equipment may be used, its storage, del iv ery , instal lation, check out, safe
operation and maintenance. Since conditions of use of the product are outside of the care, custody and control of Killark, the purchaser should
P/N KIL00921445 FORM NO. K1445 R6/18 ECO-2-045-18
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HUBBELL ELECTRICAL PRODUCTS
A Division of HUBBELL INCORPORATE D (Delaware)
INSTALLATION, OPERATION &
Zone Classified Hazardous Locations
3940 Dr. Martin Luther King Drive
St. Louis, Missouri 63113 USA
MAINTENANCE DATA SHEET
SERIES USF JUNCTION BOXES
Increased Safety Terminal Enclosures For Use In
Application Information
a: The enclosure forms the basis for certification of a unit or protection system for use in hazardous areas other than Zone 0 (Class I Div. 1).
b: All internal components mounted in these Junction Box enclosures should be ATEX and IECEx Certified , and Listed or Recognized for
CANADA and US, for the application.
c: All components must be installed in accordance w ith the compone nt manu fac tur er' s in st a llat ion instructions.
d: A complete Junction Box should be installed using supply wiring methods (including grounding) in accordance with the
local/jurisdictional ele ctri cal code(s).
e.: A 1/4-20 UNC (M6) ground / earthing stud is supplied on all Series USF enclosures.
f: To maintian proper IP ratings, be sure to follow all mfr's. mounting instructions when installing certified cable glands or conduit entries.
Warning: Enclosures must be installed in the upright vertical position only. Mounting the enclosures in a horizontal position could cause a fire or
explosion due to excessive dust / heat build-up.
CATALOG LOGIC: USF 12 12 06 * W S 1 6 GP1234 *
1 2 3 4 5 6 7 8 9
1. SERIES DESIGNATOR
2. ENCLOSURE SIZE - L x W x D (inches)
3. MATERIAL
Blank = 316 Stainless Steel
S = 304 Stainless Steel
C = Carbon Steel (Painted)
4. TERMINAL MANUFACTURER
W = Weidmuller
A = ABB
P = Phoenix
G = WAGO
K = Klemsan Elektrik
5. TERMINAL TYPE
S = Screw
C = Cage Clamp
6. NUMBER OF ROWS (OF TERMINALS)
7. TERMINAL BLOCK SIZE
1 = 1.5 mm
4 = 4 mm
10 = 10 mm
35 = 35 mm
For Larger Sizes : Please Contact Customer Service
8. GLAND PLATE LOCATOR
0 = None 1 = Bottom 2 = LHS 3 = Top 4 = RHS
9. OPTIONS (See Catalog)
2
(#14 AWG) 2 = 2.5 mm2 (#14 AWG)
2
(#12 AWG) 6 = 6 mm2 (#10 AWG)
2
(#8 AWG) 16 = 16 mm2 (#6 AWG)
2
(#2 AWG)
P/N KIL00921445 FORM NO. K1445 R6/18 ECO-2-045-18
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HUBBELL ELECTRICAL PRODUCTS
A Division of HUBBELL INCORPORATE D (Delaware)
INSTALLATION, OPERATION &
Zone Classified Hazardous Locations
WARNING: Enclosures that are powder co ated have a potent ial electrostatic charging hazard. Wipe the enclosure down with a moi st cloth
Terminal Block Installation and Wiring Instructions:
l: When Weidmuller WDU 1.5 or WDU 2.5 Series Terminal Blocks are installed, they are limited to a maximum current of 15A.
3940 Dr. Martin Luther King Drive
St. Louis, Missouri 63113 USA
MAINTENANCE DATA SHEET
SERIES USF JUNCTION BOXES
Increased Safety Terminal Enclosures For Use In
Enclosure and Cover Installation Instructions
before servicing.
a: Using a screwdriver with a #2 Phillips Head, a Standard Slotted or Robertson style head, remove the cover screws. Securely fasten the
enclosure to the mounting location, using up to a 1/4” (M6) diameter steel bolt and washer. The mounting location must be flat and provide
proper clearance, rigidity and strength to support the enclosure and all contained devices. Mounting dimensions are shown in this document.
b: Install Internal Components per the Mfrs. installation instructions. (See "Wiring and Terminal Block" and "Cable Gland / Conduit Entry"
Installation Instructions Sections below).
c: Grounding connections are available at the din rail, earth continuity plate and internal- external ground stud.
d: Bonding connections are available on covers and boxes of all enclosures. All exposed metal should be bonded per local electrical codes.
e: Closing / Installing the enclosure cover: Thread each cover screw half way into the threaded insert without completely tightening in a diagonal
pattern. Then complete installation of cover by tightening screws in the same diagonal pattern to a minimum torque of 3 Nm (26 lb-i ns.) to a
maximum of 4 Nm (35 lb-ins.). DO NOT OVERTIGHTEN OR USE AN IMPACT TOOL. A consistent fit over the entire length of the cover joint
should be verified at the time of installation.
f: This enclosure is provided without cable glands / conduit sealing devices. Proper selection of cable glands / conduit sealing devices must
occur in the field.
g: Cable fittings must be certified “Ex e” components per EN 60079-7. For lines which are not permanently installed, only cable fittings
appropriate for this purpose can be used. They are to be protected from loosening and locked against rotation, i.e. clips, cemented, etc., per EN
60079-7. The operating (service) temperature of the enclosure is limited to the temperature of the gland fitting if less than the enclosure.
h: Killark KDE series drain and breather may be installed. The operating temperature of the enclosure is limited to the temperature of the drain
and breathers if lower than the enclosure's. Other drain and breathers may be installed, the user is responsible for ensuring that the
protection concept, temperature class and relevant IP rating is maintained.
i: All unused conduit openings must be fitted with a certified close-up plug of equivalent minimum required IP rating as required.
a: Attention to detail is highly recommended when installing and wiring the Terminal Blocks. Proper installation is required to ensure the
component Certification Ratings are not invalidated.
b: Care should be taken not to damage or crack the DIN-Rail mounting clips when removing or installing polymeric terminal blocks. Damaged or
loose-fitting terminal blocks should be replaced before energizing the device.
c: Refer to each Terminal Block Manufacturer's Installation Instructions for suitable wire types (ie: Solid, Stranded), proper wire stripping lengths,
and terminal torques. OVERTIGHTENED or LOOSE WIRE TERMINALS MAY CAUSE OVERHEATING, WHICH CAN RESULT IN AN
ELECTRIC SHOCK OR EXPLOSION HAZARD.
d Care shall be taken to ensure proper separation of circuits (voltages), and spacings (creepage and clearance distances between live parts of
opposite polarity, and between all live parts and dead metal) are maintained. Refer to IEC/EN/UL/CSA 60079-7, Table 2, for minimum creepage
and clearance distances.
e: Grounding connections are available at the din rail, earth continuity plate and internal- external ground stud. Bonding connections are
available on covers and boxes of all enclosures. All exposed metal should be bonded per local electrical codes.
f: Wiring must be carried out in accordance with the relevant local and national electrical codes (ie: IEC/EN 60079-14, IEC/EN 61241-0 and
IEC/EN 61241-1.
g: All conductor insulation and terminal block service temperature ratings shall be suitable for (exceed) the minimum ambient and
maximum temperature (defer to T-Code) achieved in service. All conductors shall be sized per the National or Local Electrical Codes
for the max. continuous current or max. motor load of the installation.
h: Conductors at entry points may reach 73oC in a +55oC ambient, and may reach 108oC in a +90oC ambient.
i: Only the terminal blocks listed on Killark certificates may be installed in the enclosures. See Table A below.
j: No more than one conductor shall not be permitted in a wire terminal, unless the device has been evaluated specifially for multiconductor
installation (See Terminal Block Mfr's Installation Instructions). Ferrules may be used if the Terminal Block has been approved for use with Solid
Wires of equivalent diameter.
k: When installing Terminal blocks, the maximum voltage, current and dissipated power shown on the Junction Box nameplate must not be
exceeded.
P/N KIL00921445 FORM NO. K1445 R6/18 ECO-2-045-18
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