A company of MARECHAL ELECTRIC GROUP
MELTRIC Corporation / 4765 W. Oakwood Park Drive Franklin, WI 53132
A manufacturer of products using Marechal technology
meltric.com
GENERAL
The SPeX is a single-pole plug and receptacle for use
in explosive atmospheres and conforms to the relevant
international and European standards, particularly the
ATEX 94/9/EC Directive. SPeX can be used in zones
1 and 2 (gas) and 21 and 22 (dust).
In order to guarantee a connection and disconnection
in complete safety, the SPeX receptacle is tted with
an electromechanical device (switch + ring) for electri-
cal interlocking with a contactor (breaker) and an inte-
gral pilot control circuit.
Receptacle contacts are protected against standard
test nger (IP2X) according to IEC/EN 60529 standard.
There are inherent dangers
associated with electrical pro-
ducts. Failure to follow safety
precautions can result in serious injury or death. These
instructions must be followed to ensure the safe and
proper installation, operation and maintenance of the
MELTRIC devices. Before installation, disconnect all
sources of power to the circuit to eliminate the risk of
electrical shock. This product must be installed with
an electrical interlock that prevents connection or dis-
connection in a loaded condition.
RATINGS
SPeX devices are provided with optional auxiliary
contacts that make after and break before the phase
contacts. The ratings for auxiliary contacts are shown
in Table 1.
INSTALLATION
SPeX must be installed by a qualied electrician
in accordance with all applicable local and natio-
nal electric codes. Be sure power is off before starting.
The supply of the pilot circuit must be protected against
transient over-voltages of 4 kV by means of an appro-
priate isolating device.
Electrical interlocking with a contactor is mandatory.
Assembly
Insert cable through the cable gland and the handle or
through the inclined sleeve.
Wiring of the pilot wires
Use exible conductors with a cross-sectional area
between 0.5 and 1 mm2 (16 to 20 AWG).
NOTICE: These conductors must be connected to the
wires of the microswitch by means of the isolated crim-
ping lugs supplied. Use an appropriate crimping tool.
A typical pilot circuit wiring diagram is shown below.
Wiring of the main conductor
Wire the main conductors within the amperage
and hazardous duty requirements of the ATEX
(T5) classication. The cross-section must
be at least that dened in the certicate or the CE
Declaration of Conformity, depending on the maximum
current.
Strip the conductor by 1.8” (46 mm). Crimp the
threaded lug or the ferrule with the appropriate die
(NFC 20-130 or VDE 0220 or another). Hexagonal
crimping is recommended.
Tighten the threaded lug with a 24 mm wrench or
tighten the ferrule with a screw and a washer with a
19 mm wrench. Apply a torque ca. 95 ft-lbs (70 N.m).
While tightening the ferrule, prevent the contact from
rotating or transmitting torque to the device with a 24
mm wrench.
Assembly of the connector
Assemble the handles on the body of the products with
the supplied gaskets and screws and tighten the cable
gland with an appropriate tool. To achieve the IP65/
IP66 of an interlocked connector, use a cable that in-
corporates the two pilot wires that are required for the
interlock, or use an ATEX cable gland bushing that al-
lows the passage of the main cable and the two pilot
cables. The silicone ring must be assembled on the
receptacle ring.
Assembly of the metal inclined sleeve.
Maintain air and creepage distances when assembling
the appliance inlet or the receptacle onto the metal in-
clined sleeve, according to the operating voltage of the
main and auxiliary circuit and the degree of pollution.
The metal inclined sleeve must be grounded
to Earth.
Assembly of the plug/inlet cap
Assemble the small xing part supplied on the last link
of the chain and x it to the plug/inlet body by means
of one of the screws.
Color-coded rings
In order to achieve watertightness, do not forget the
color-coded ring at the rear of the inlet or receptacle.
The color-coded rings allows visual identication of the
pole depending on the color code of each country.
Isolating ring
When assembling the SPeX on a metallic support
(enclosure, panel, etc.), the isolating ring must be
positioned as above.
Receptacles, plugs, connectors and inlets are protec-
ted against dust and water ingress by means of caps,
which must be re-assembled after use.
To achieve IP65/IP66, the receptacle or connector cap
must be assembled with its slot facing the socket-outlet
protruding nger.
OPERATION
To ensure safe and reliable operation, MELTRIC
plugs and receptacles must be used in accor-
dance with their assigned ratings.
They can only be used in conjunction with mating
receptacles or plugs manufactured by MELTRIC or
another licensed producer of products bearing the
TM technology trademark.
Color-coded ring
Color-coded ring
Flat gasket Isolating ring
L1 L2 L3 N
L1 L2 L3 N
P1 P2
L1 L2 L3 N
L1 L2 L3 N
P1 P2
Max Min
SPeX 750 MCM 2/0 12-14 AWG
Table 2 - Wiring Terminal Capacity
Main Contacts Aux. Contacts
Table 1 - Auxiliary Contact Ratings
Device 120VAC 240VAC 480VAC 600VAC
SPeX – 6A (220 max)* – –
* Rating is not UL or CSA listed.
SPeX
OPERATING INSTRUCTIONS
INSSPEX D
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