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
Page 6 of
10
Certification Information
North American Certifications:
North American (NEC/CEC) Certifications***:
Class I, Zone 1 AEx eb IIC Gb T6...T4 (U.S.)
Zone 21 AEx tb IIIC Db T80
o
C...T130
o
C IP66 (U.S.)
Ex db eb IIC Gb T6...T4 (CAN)
Ex tb IIIC Db T85
o
C...T135
o
C IP66 (CAN)
Class I, Division 2, Groups A,B,C,D
Class II, Zone 21 & 22
Class II, Groups E, F, G; Class III
Type 3/4/4X**/IP66
** - Only 304 and 316 Stainless Steel Enclosures are Type 4X
- 50
o
C
≤ Ta ≤ +40
o
C (when marked T6 / T80
o
C)
- 50
o
C
≤ Ta ≤ +55
o
C (when marked T5 / T100
o
C)
- 50
o
C
≤ Ta ≤ +90
o
C (when marked T4 / T130
o
C)
Standards Applied:
CSA 60079-0 ANSI/ISA 60079-0
CSA 60079-7 ANSI/ISA 60079-7
CSA 60079-31 ANSI/ISA 60079-31
CSA No. 94.1 / 94.2 / 14 UL50 / UL50E / UL508
CSA 60529 ANSI/IEC 60529
IEC / ATEX Certifications:
ATEX Ratings
: SIRA 14 ATEX 3157
0518
II 1 G Ex ia IIC T6/T5/T4 Ga
II 2 D Ex tb IIIC T80
o
C / T100
o
C / T130
o
C Db IP66
OR
0518
II 2 G Ex eb IIC T6/T5/T4 Gb
Ex ib IIC T6/T5/T4 Gb
II 2 D Ex tb IIIC T80
o
C / T100
o
C / T130
o
C Db IP66
OR
0518
II 1 G Ex eb ib IIC T6/T5/T4 Gb
II 2 D Ex tb IIIC T80
o
C / T100
o
C / T130
o
C Db IP66
IECEx Ratings
: IECEx SIR 14.0054
When ia Terminals are installed (only):
Ex ia IIC T6/T5/T4 Ga
Ex tb IIIC T80
o
C / T100
o
C / T130
o
C Db IP66
OR
Ex eb IIC T6/T5/T4 Gb
(with Ex e terminals only
) OR
Ex ib IIC T6/T5/T4 Gb
(with Ex ib terminals only
)
Ex tb IIIC T80
o
C / T100
o
C / T130
o
C Db IP66
OR
Ex eb ib IIC T6/T5/T4 Gb
(with Ex e & ib terminals
)
Ex tb IIIC T80
o
C / T100
o
C / T130
o
C Db IP66
-
#
o
C
≤ Ta ≤ +40
o
C (when marked T6 / T80
o
C)
-
#
o
C
≤ Ta ≤ +55
o
C (when marked T5 / T100
o
C)
-
#
o
C
≤ Ta ≤ +90
o
C (when marked T4 / T130
o
C)
#
- Mimumum Ambient Temp. may be either -50
o
C, -45
o
C, -40
o
C or -20
o
C - See Table
1 below for minimum ambient ratings based on installed T-Blocks.
Standards Applied:
EN 60079-0 IEC 60079-0
EN 60079-7 IEC 60079-7
EN 60079-11 IEC 60079-11 (Terminal Blocks)
IEC 60079-31
Electrical Ratings
The overall electrical ratings of an USF Junction Box is dependent upon the ratings of the terminal blocks installed.
Please refer to the Terminal
Block Mfr's. website - or see the Killark Online Catalog (Section E) for specific Terminal Block Current, Voltage and Resistance (Full and
Partial Load Wattage) ratings:
http://ecatalog.hubbell-killark.com/
Labels / Nameplates
To maintain the IP (Ingress Protection) levels and the NEMA / TYPE ratings of the Series USF enclosures, end-product nameplates or label & tag
mounting holes must
not penetrate the interior of the enclosure.
Earthing (Grounding)
The earth connection accepts a cable lug. The cable must be run and fixed near to the enclosure. The earth connection must be made in all
circumstances.
Conduit Hubs and Cable Glands
Conduit hubs and cable gland sizes may be mixed. The maximum number of hubs or cable glands must be selected such that the walls are not weakened
nor the enclosure stability affected .
See Figure 1 below, and Tables 1 - 7 below for Enclosure Dimensions and Mounting Hole Locations, Conduit and Gland Mountnig Details (Useable Wall
Area, Hole Spacing Details, etc) .
