Insert the cable or wires through the wall box and cut
to allow adequate length, strip the cable sheath as
desired, strip the individual wires to the lengths indi-
cated in Table 3, 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 4.
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 being performed, the clearance and mounting
holes should be drilled as indicated in the following
diagram and Table 5.
In order to maintain the NEMA 4X or IP 66 & 67 pro-
tection provided by DSN models in custom installa-
tions, watertight 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 mount-
ing 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 manu-
factured by Meltric or another licensed producer of
products bearing the
TM
Quality Label.
Meltric plugs & receptacles are designed with differ-
ent 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, then orient the
plug as shown in figure 1 so that the red dot on the
outside of the casing lines up with the red dot just to
the left of the latch on the receptacle casing. Push
the plug partially into the receptacle until it hits a
stop, then rotate the plug in the clockwise direction
until it hits another stop after about 30° of rotation.
At this point, the circuit is still open. Push the plug
straight into the receptacle as shown in figure 2 until
it becomes securely latched in place. The electrical
connection is now made. On in-line connectors,
squeeze the drawplates on both sides of the device
together until the plug latches in place.
Disconnection
To break the connection, simply depress the pawl as
shown in figure 3 . This will break 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 counter-clockwise (about
30°) until it releases from the receptacle as shown in
figure 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
All DS and DSN plugs are provided with lockout pro-
visions. To lockout the plug, insert a locking device
through the hole provided in the casing. This will
prevent the plug from being inserted into a receptacle.
DS and DSN receptacles may be purchased with
optional lockout provisions. To lockout the receptacle,
close and latch the lid and then attach the locking
device through the hole provided in the pawl. This
will prevent the lid from being opened for the inser-
tion of a plug.
NOTE:
Attaching the receptacle locking device with
the receptacle lid open will not prevent the insertion
of a plug. Lockout of the receptacle is only accom-
plished when the lid is locked closed.
MAINTENANCE
Meltric products require little on-going maintenance.
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 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
electrician. This should only be done with the power
off. It is accomplished by depressing the numbered
ring around the circumference of the interior on two
opposite points. This will allow the shutter to be
manually turned clockwise as required to permit
access to the contacts. Once the inspection is com-
plete, the shutter
must
be rotated counter-clockwise
until it is locked in the closed position.
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 penalties or conse-
quential damages associated with the loss of produc-
tion, 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
TM
Quality Label. The use of
Meltric products in conjunction with mating devices
that are not marked with the
TM
Quality
Label 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 stan-
dards. Meltric is also a member of BECMA, the inter-
national Butt-contact Electrical Connectors
Manufacturers’ Association. Like all members,
Meltric additionally designs and manufactures its
products in accordance with BECMA standards
established to ensure intermatablility with similarly
rated products manufactured by other members.
www.becma.ch
C
A
B
B
Table 5 - Custom Mounting Dimensions
‘A’
‘B’
C
Model
Inches mm Inches mm Inches mm
DSN20
-Recept
2.00
51
1.65
42
.19
5
DSN30
2.25
57
1.89
48
.19
5
DSN60
2.50
64
2.17
55
.19
5
DS20
2.25
57
1.89
48
.19
5
DS30
2.50
64
2.17
55
.19
5
DS60&DS100C 3.25
83
2.59
66
.22
5.5
DS100
4.00 102 3.20
81
.22
5.5
DS200
4.50 114 3.86
98
.28
7
INSDS/DSN 072408 E
