Meltric DN9C, DN20C Instruction Manual
ENGLISH OPERATING INSTRUCTIONS
WARNING
WARNING
WARNING
DN9C/DN20C MULTIPIN
©2020 MELTRIC Corporation. All rights reserved.
A manufacturer of products using Marechal technology
GENERAL
MELTRIC’s DN9c and DN20c Series industrial, multipin
plugs and receptacles are designed to ensure safety and
provide reliable electrical connections. Please follow the
instructions below to ensure proper installation and safe
use of the product.
There are inherent dangers
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.
RATINGS
The DN9c and DN20c products are manufactured and
load-break rated in compliance with CSA Standard C22.2
No. 182.1. The product ratings are indicated on the
device’s labels. Additionally the DN9c and DN20c are
HP rated for multiple HP loads as long as any single HP
load doesn’t exceed the levels shown in Table 1. Their
short circuit withstand levels and fuse ratings are shown
in Table 2.
Table 1 — Maximum HP at Rated Voltage Levels
Device 120 VAC 208 VAC 240 VAC 277 VAC 480 VAC
DN9c
DN20c 1/6 1/3 1/2 1/2 1-1/2
Device 208 VAC 240 VAC 480 VAC
DN9c 2 3 5
DN20c 1 1 3
Table 2 — Short Circuit Withstand Ratings
Device Rating Fuse Type*
DN9c 10 kA @ 480 VAC
DN20c 10 kA @ 480 VAC
* Ratings applies with fusing up to this amperage. Ratings are based
on tests performed with Ferraz Shawmut current limiting fuses.
associated with electrical products.
1-Phase
1/2 1 1-1/2 2 3
3-Phase
RK1 NTD 35 A
RK5 TD 20 A
RK1 NTD 35 A
RK5 TD 20 A
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INSTALLATION
These products should be installed by qualied
personnel in accordance with all applicable local,
state and national electrical codes. Before starting,
verify that the power is turned off; the product ratings are
appropriate for the application; and the conductor sizes
are within the capacities of the terminals noted on Table 3.
Table 3 — Wiring Terminal Capacity* (in AWG)
Contacts
Device Min Max
DN9c 16 10
DN20c 16 10
*Capacity is based on THHN wire sizes.
General Notes & Precautions
1. Self-tapping screws are provided for use with
some polymeric accessories. NOTICE: Once
they are seated, care should be taken in order
to avoid over-tightening them against the
plastic material.
2 Various handles, cord grips or strain relief
options may be used. These instructions are
based on handles provided with integral,
multi- layer, bushing cord grips.
3. Wire strip lengths are indicated in Table 4.
Strip lengths for cable sheathing will depend
on the specic application.
Table 4 - Wire Strip Length – Dimensions A
Receptacle Plug/ Inlet
Device Inches mm Inches mm
DN9c 1/2 13 1/2 13
DN20c 1/2 13 1/2 13
4. Wiring terminals are spring-assisted to prevent loosening
due to wire strand settlement, vibration and thermal
cycling. NOTICE: They should not be over-tightened.
Appropriate tools and tightening torques are indicated
in Table 5.
Table 5 - Terminal Screw Tightening Torques
Torque
Device in-lbs N-m Required Driver
DN9c 4.50 0.5 2mm hex head
DN20c 4.50 0.5 2mm hex head
The DN9c and DN20c plugs and receptacles’ contacts are
labeled with F or S numbers respectively. The F-number
on the inlet has a corresponding S-number on the receptacle.
See table 6 for details.
Table 6 - DN9c & DN20c Wiring
Plu
g/Inlet Corresponding Receptacle
Contact Nos. mating pin Contact Nos.
F1 (Ground) S1 (Ground)
F2 S2
F3 S3
F4-19 S4-19
F20 S20
Assembly for In-line Connections
Do not overtighten terminal or self-tapping screws.
Tighten screws to the proper torque to ensure a
secure connection.
When the DN9c product is used as an in-line connector,
nger drawplates should be installed on both the receptacle
and plug in order to provide the user with the leverage to
connect the device.
NOTICE: The longer screws provided with the nger
drawplates must be used when assembling devices with
nger drawplates because the shorter screws provided
with the handle are not long enough to properly secure
both the handle and drawplates to the inlet or receptacle
and achieve a watertight connection.
Bushing
Strain
Relief
Compression
Nut
Adjust the bushing diameter to t the cable by removing
the inner sections as required. Insert the bushing into
the strain relief, then insert the assembly into the handle
and loosely install the compression nut. Insert the cable
through the handle, the thin black (neoprene) drawplate
gasket, the nger drawplate (if applicable) and the color
coded gasket. Strip the cable sheath to provide a
workable wire length, being mindful that the sheath must
extend into the handle to achieve a secure cord grip. Then
strip the individual wires to the lengths indicated in Table 2
and twist the strands of each conductor 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 tighten the terminal screws with the appropriate
tool to the torque indicated in Table 3.
Verify that the cable sheath extends beyond the strain
relief and into the handle. Assemble the receptacle (or
inlet), the color coded gasket, followed by the nger drawplate,
and the thin black (neoprene) drawplate gasket (if applicable)
to the handle and tighten the compression nut to secure
the cable.
Assembly for Mounted Receptacles (or Inlets)
In applications where the receptacles (or inlets) are
mounted to wall boxes, panels or other equipment, optimal
operation is achieved when the devices are installed with
the latch at the top.
Insert the cable or wires through the wall box and cut to
allow adequate length. Strip the cable sheath as desired,
then strip the individual wires to the lengths indicated in
Table 2 and twist the strands of each conductor 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.
Handle
Mount the receptacle
at a downward angle
whenever possible.
Finger Drawplate Gasket
Finger Drawplate
Color-Coded
Gasket
Mount with the latching pawl at
the top to counteract the weight
and strain of the plug & cable.
Receptacle
(or Inlet)
Assemble the receptacle (or inlet) and the color coded
WARNING
WARNING
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 nger 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.
B
C
Table 7 - Custom Mounting Dimensions
Model Inches mm Inches mm Inches mm
DN9c 2.70 69 2.18 55 .19 4.8
DN20c 4.00 102 3.20 81 .22 5.5
NOTICE: In order to maintain the IP protection provided
by DN models in custom installations, 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
mounting screws, provided that the hole depth is sufcient
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 congurations and electrical
ratings will mate with each other.
Connection
To connect a plug and receptacle, rst depress the pawl
to open the lid on the receptacle and orient the plug as
shown in gure 1. Push the plug partially into the receptacle
until it hits a stop and then rotate the plug in the counterclockwise 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 nger drawplates is recommended. When nger drawplates
are used, squeeze the drawplates on both sides of the
device together until the plug latches in place.
A
‘A’ ‘B’ ‘C’
B
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 receptacle,
close and latch the lid and then attach the locking 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 insertion of a
plug. Lockout is only accomplished when the lid is locked
closed.
MAINTENANCE
Before inspecting, repairing,
products, disconnect electrical power to the receptacle to
eliminate the risk of electrical shock.
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 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 signicant
pitting of the contacts or other serious damage is observed,
the device should be replaced.
Receptacle contacts may be inspected by a qualied
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 specied in the purchase contract. MELTRIC
shall not be liable for any penalties or consequential
damages associated with the loss of production, work, prot
or any nancial loss incurred by the customer.
MELTRIC Corporation shall not be held liable when its
products are used in conjunction with products not bearing
the
products in conjunction with mating devices that are not
marked with the
void all warranties on the product.
MELTRIC Corporation is an ISO 9001 certied 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 keying standards established to ensure
intermateablility with similarly rated products manufactured
by Marechal Electric Group.
™
or maintaining MELTRIC
technology trademark. The use of MELTRIC
™
technology trademark shall
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