ENGLISH OPERATING INSTRUCTIONS
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.
WARNING
There are inherent dangers
associated with electrical products.
Failure to follow safety precautions can result in serious
DANGER
injury or death. These instructions must be followed to
ensure the safe and proper installation, operation and
CAUTION
maintenance of the MELTRIC devices. Before installation,
disconnect all sources of power to the circuit to eliminate
NOTICE
the risk of electrical shock.
RATINGS
ADVERTENCIA
The DN9c and DN20c products are manufactured and
DANGER
load-break rated in compliance with CSA Standard C22.2
No. 182.1. The product ratings are indicated on the
CAUTION
device's labels. Additionally the DN9c and DN20c are
HP rated for multiple HP loads as long as any single HP
AVISO
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
1-Phase
Device 120 VAC 208 VAC 240 VAC 277 VAC 480 VAC
DN9c
1/2
1
1-1/2
DN20c
1/6
1/3
1/2
3-Phase
Device
208 VAC
240 VAC
DN9c
2
3
DN20c
1
1
Table 2 — Short Circuit Withstand Ratings
Device
Rating Fuse
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.
INSTALLATION
These products should be installed by qualified
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
WARNING
are within the capacities of the terminals noted on Table 3.
DANGER
Table 3 — Wiring Terminal Capacity* (in AWG)
CAUTION
Device
NOTICE
DN9c
DN20c
ADVERTENCIA
*Capacity is based on THHN wire sizes.
DANGER
General Notes & Precautions
CAUTION
1. Self-tapping screws are provided for use with
some polymeric accessories. NOTICE: Once
they are seated, care should be taken in order
AVISO
to avoid over-tightening them against the
INSDN M
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 specific application.
Table 4 - Wire Strip Length – Dimensions A
Device
DN9c
DN20c
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
Device
DN9c
DN20c
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.
2
3
1/2
1-1/2
Plug /Inlet
Contact Nos.
F1 (Ground)
480 VAC
F2
5
F3
F4-19
3
F20
Type*
RK1 NTD 35 A
RK5 TD
20 A
RK1 NTD 35 A
RK5 TD
20 A
Contacts
Min
Max
16
16
Receptacle
Plug /Inlet
Inches
mm
Inches
1/2
13
1/2
1/2
13
1/2
Torque
in-lbs N-m
Required Driver
4.50 0.5
2mm hex head
4.50 0.5
2mm hex head
Table 6 - DN9c & DN20c Wiring
Corresponding
Receptacle
mating pin
Contact Nos.
S1 (Ground)
S2
S3
S4-19
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,
WARNING
finger drawplates should be installed on both the receptacle
and plug in order to provide the user with the leverage to
DANGER
connect the device.
NOTICE: The longer screws provided with the finger
CAUTION
drawplates must be used when assembling devices with
finger drawplates because the shorter screws provided
10
NOTICE
with the handle are not long enough to properly secure
10
both the handle and drawplates to the inlet or receptacle
and achieve a watertight connection.
ADVERTENCIA
DANGER
Bushing
CAUTION
AVISO
Strain
Relief
Handle
Compression
Nut
Adjust the bushing diameter to fit 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 finger 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)
mm
far enough (but not completely) to allow the conductors
13
to pass. Insert the conductors fully into their respective
13
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 finger 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.
Mount the receptacle
at a downward angle
whenever possible.
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.
Finger Drawplate Gasket
Finger Drawplate
Color-Coded
Receptacle
Gasket
(or Inlet)
Mount with the latching pawl at
the top to counteract the weight
and strain of the plug & cable.