All statements, technical information and recommendations contained herein are based on information and tests we believe to be reliable. The accuracy or completeness thereof are not
guaranteed. In accordance with Eaton’s Crouse-Hinds Division’s “Terms and Conditions of Sale,” and since conditions of use are outside our control, the purchaser should determine
the suitability of the product for his intended use and assumes all risk and liability whatsoever in connection therewith.
Eaton’s Crouse-Hinds Division
IF 1857
1201 Wolf Street Syracuse, NY 13208 • U.S.A. Revision 1
Copyright © 2018 New 09/18
WIRE SIZE CHART
The chart below shows the wire size for each type of EMPX devices.
UL
IECEx and ATEX
Device type
Hard wire
(up to 2
wires)
Flexible
cable
(up to 2
wires)
Hard
wire
(up to 2
wires)
Flexible
cable
(up to 2
wires)
Torque
Pushbuttons and lights
18 - 13 AWG 20 - 15 AWG 2.5mm
2
1.5mm
2
9 in.-lbs.
(1 N-m)
Selector switches
12 AWG
14 AWG
2.5mm
2
2.5mm
2
9 in.-lbs.
(1 N-m)
IECEx AND ATEX SPECIAL CONDITIONS FOR SAFE USE
•
For flameproof applications, the actuators and signaling elements shall only be
installed in Ex db enclosures with maximum internal volume of 35 liters and approved
for Group IIC or Ex db enclosures with maximum internal volume of 160 liters and
approved for Group IIB + H
2
, according to EN60079-1/IEC 60079-1.
•
For flameproof applications, the actuators and signaling elements shall only be
installed in Ex db enclosures with maximum internal explosion pressure of 20 bar for
Group IIC according to EN60079-1/IEC 60079-1.
•
The actuators and signaling elements shall only be used for a service temperature
range of -50°C to +60°C.
•
For flameproof applications, the actuators and signaling elements shall only be
threaded in enclosure walls having a minimum length of at least five (5) threads
engaged for 3/4” NPSM, according to Table 4 from EN 60079-1/IEC 60079-1. The
maximum thickness of the enclosure wall is limited by size (length) of the actuating
and signal elements.
•
For dustproof applications, the actuators and signaling elements shall only be threaded
in enclosure wall having a minimum length of 3.7mm for 3/4” NPSM, and at least
two (2) threads engaged according to EN 60079-31. The maximum thickness of the
enclosure wall is limited by size (length) of the actuating and signal elements. The
elements have to be fixed in the electrical equipment in such a way that rotation and
accidental loosening will be prevented.
•
For the pilot light and illuminated buttons, the maximum load for LED is 2W.
•
The outer molding of the elements has to be tightened according manufacturer’s
instructions.
•
When a locknut is used, care must be taken to ensure that an engagement of two (2)
threads is still available for fixing the locknut.
•
The manufacturer’s instructions for operation must be followed.
STORAGE
Upon receiving the product, the parts must stored in a covered, clean and dry place so that
there is no contact between threads of the products.
INSPECTION AND MAINTENANCE
Inspection and maintenance must be performed in accordance with the applicable codes of
practice by an appropriately trained person.
REPAIR
A properly trained person shall perform the repair of equipment in accordance with the
manufacturer’s instructions and applicable codes of practice. Repair/modification must be
performed only with manufacturer original parts and should be limited to the replacement of
the following parts:
•
Gasket
•
Contact blocks
•
Adapter for circuit breaker
•
Power supply module for pilot light
•
Color calotte for signaling
