HUBBELL ELECTRICAL PRODUCTS
A Division of HUBBELL INCORPORATED (Delaware)
3940 Dr. Martin Luther King Drive
St. Louis, Missouri 63113 USA
INSTALLATION, OPERATION &
MAINTENANCE DATA SHEET
SERIES USF JUNCTION BOXES
Increased Safety Terminal Enclosures For Use In
Zone Classified Hazardous Locations
P/N KIL00921445 FORM NO. K1445 R6/18 ECO-2-045-18
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Maintenance Instructions:
WARNING:
Before
servicing the enclosure, be sure ALL electrical power is
OFF and LOCKED OUT
.
WARNING: Enclosures that are powder coated have a potential electrostatic charging hazard. Wipe the enclosure down
with a moist cloth before servicing.
WARNING: Maintenance on the end product should be carried out by authorized and trained personnel only. Following
any maintenance, the enclosure gasket must be checked for damage before the cover is replaced / reinstalled.
a:
After initial installation, the unit should be inspected at regular intervals to verify the cover is tight; that all conduit or gland
connections are intact and free of corrosion and that the enclosure mounting bolts are tight and in good condition.
b:
Inspect flanged surfaces of the box and of the cover gasket. Surfaces must be free of nicks, dirt or any foreign particle build-up
that would prevent a proper seal. Check hinges to ensure they are improper working order.
c:
Should the surfaces be damaged, consult factory. Never attempt to rework the surfaces in the field. Surfaces must seat fully
against each other to provide the proper joint.
d:
Apply a light coating of Killark “LUBG” lubricant to the box flange before closing the cover. All cover screws must be installed
tightly (25 to 36 lb-ins.) to ensure the joint between the box and cover is sealed prior to powering the unit. An improper joint can
result in an explosion with the possibility of physical injury and property damage.
e: Series USF
hinged covers are permanent and are not field removable or replaceable. Prior to securing the cover add lubrication
to the hinge pin to aid in operation and the free movement of the cover .
Important
: Care is to be taken opening the cover to help
prevent accidental damage to the cover and cover gasket. Never apply excess force to the cover when closing the hinged cover.
Never hammer the cover, this will deform the covers and possibly reduce the protection level of the enclosure.
Conditions For Safe Use (IECEx/ATEX):
WARNING: Enclosures that are powder coated have a potential electrostatic charging hazard. Wipe the enclosure down
with a moist cloth before servicing. Conductors at entry points may reach 73
o
C in a +55
o
C ambient, and may reach 108
o
C
in a +90
o
C ambient.
a: The range of enclosures shall only be used in a service temperature range of -55
O
C to +135
O
C.
b: When Junction Boxes are equipped by the manufacturer with wired terminals, a routine electric strength test is required per EN
60079, Clause 6.1.
c: The maximum dissipated power in watts for each model of junction box shall be calculated in accordance with EN 60079-7,
Annex E, E.2, and shall not exceed the maximums given in Table 6 below.
