desired, then strip the individual wires to the lengths
indicated in Table 2 and twist the strands of each con-
ductor together. Back out the terminal screws on the
receptacle (or inlet) far enough (but not completely) to
allow the conductors to pass. Insert the conductors
fully into their respective terminals and hand tighten
the terminal screws to the torque indicated in Table 3.
Assemble the receptacle (or inlet) and the color
coded gasket to the box with the appropriate hardware.
Assemble the mating plug (or receptacle) to the cord
end as indicated in the assembly instructions above
for in-line connections, except there will be no finger
drawplate or associated black gasket.
Hole Pattern for Custom Mounting
In applications where custom mounting to a panel
or box is desired, the clearance and mounting holes
should be drilled as indicated in the following diagram
and Table 7.
NOTICE:
In order to maintain the IP protection pro-
vided by DN models in custom installations, water-
tight seals should be used under the heads of
the four mounting bolts and they must be retained
by a lock washer and nut on the inside of the box or
panel. Alternatively, four blind holes may be drilled
and threaded to accommodate the mounting screws,
provided that the hole depth is sufficient to achieve
adequate gasket compression.
OPERATION
To ensure safe and reliable operation,
MELTRIC plugs and receptacles must be used
in accordance 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
™
technology trademark.
MELTRIC plugs & receptacles are designed with
different keying arrangements so that only plugs and
receptacles with compatible contact configurations
and electrical ratings will mate with each other.
Connection
To connect a plug and receptacle, first depress the
pawl to open the lid on the receptacle and orient the
plug as shown in figure 1. Push the plug partially
into the receptacle until it hits a stop and then rotate
the plug in the counter-clockwise direction about
30°. At this point, the circuit is still open. Push the
plug straight into the receptacle 2 until it becomes
securely latched in place. The electrical connection
is now made. For in-line connections, the use of
finger drawplates is recommended. When finger
drawplates are used, squeeze the drawplates on both
sides of the device together until the plug
latches in place.
Disconnection
To disconnect, simply depress the pawl 3. This will
open the circuit and eject the plug straight out to the
rest or off position. The plug contacts are de-energized
at this point. To remove the plug, rotate it clockwise
about 30˚ until it releases from the receptacle 4.
Close and latch the lid on the receptacle.
Achieving Rated Watertightness
Rated ingress protection applies to the device
when the plug and receptacle are mated and latched
together. It also applies to the receptacle when the
lid is latched closed.
Lockout Provisions
Some MELTRIC receptacles may be purchased with
optional lockout provisions. To lockout the recepta-
cle, close and latch the lid and then attach the lock-
ing device through the hole provided in the pawl or
shroud. This will prevent the lid from being opened
for the insertion of a plug.
NOTICE:
Attaching the receptacle locking device
with the receptacle lid open will not prevent the inser-
tion of a plug. Lockout is only accomplished when
the lid is locked closed.
MAINTENANCE
Before inspecting, repairing,
or maintaining MELTRIC prod-
ucts, disconnect electrical power to the receptacle to
eliminate the risk of electrical shock.
MELTRIC products require little on-going mainte-
nance. However, it is a good practice to periodically
perform the following general inspections:
• Check the mounting screws for tightness.
• Verify that the weight of the cable is supported
by the strain relief mechanism and not by the
terminal connections.
• Check the IP gaskets for wear and resiliency.
Replace as required.
• Verify the electrical continuity of the ground circuit.
• Check the pin contact surfaces for cleanliness
and pitting.
Deposits of dust or similar foreign materials can be
rubbed off the contacts with a clean cloth. Sprays
should not be used, as they tend to collect dirt. If
any significant pitting of the contacts or other serious
damage is observed, the device should be replaced.
Receptacle contacts may be inspected by a qualified
technician. This should only be done with the power
turned off. The inlet contacts can be inspected by
pressing on opposite ends of the numbered face.
This will make it easier to check the contacts for
pitting or damage.
MANUFACTURER’S RESPONSIBILITY
MELTRIC’s responsibility is strictly limited to the
repair or replacement of any product that does not
conform to the warranty specified in the purchase
contract. MELTRIC shall not be liable for any penal-
ties or consequential damages associated with the loss
of production, work, profit or any financial loss incurred by
the customer.
MELTRIC Corporation shall not be held liable when
its products are used in conjunction with products not
bearing the
™
technology trademark. The use
of MELTRIC products in conjunction with mating de-
vices that are not marked with the
™
technol-
ogy trademark shall void all warranties on the product.
MELTRIC Corporation
is an ISO 9001 certified company. Its
products are designed, manufactured and rated in accordance
with applicable UL, CSA and IEC standards. MELTRIC designs
and manufactures its products in accordance with Marechal key-
ing standards established to ensure intermateablility with similarly
rated products manufactured by Marechal Electric Group.
Table 7 - Custom Mounting Dimensions
‘A’
‘B’
‘C’
Model
Inches mm Inches mm Inches mm
DN7c (50A)
3.25 83
2.59 66
.22 5.5
DN9c
2.70 69
2.18 55
.19 4.8
DN20c
4.00 102 3.20 81
.22 5.5
INSDN K
C
A
B
B
WARNING
DANGER
CAUTION
NOTICE
ADVERTENCIA
DANGER
CAUTION
AVISO
WARNING
DANGER
CAUTION
NOTICE
ADVERTENCIA
DANGER
CAUTION
AVISO
