Meltric DN9C Operating Instructions

OPERATING INSTRUCTIONS
DN7C/DN9C/DN20C
MULTIPIN
MELTRIC Corporation / 4765 W. Oakwood Park Drive Franklin, WI 53132
Tel. : 800 433 7642 / Fax : 414 433 2701 / e-mail : mail@meltric.com
A manufacturer of products using Marechal technology
meltric.com
A company of MARECHAL ELECTRIC GROUP

GENERAL

MELTRIC's DN7c, DN9c and DN20c Series indus-
trial, 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 prod-
DANGER
ucts. Failure to follow safety precautions can result
in serious injury or death. These instructions must be
followed to ensure the safe and proper installation, CAUTION
operation and maintenance of the MELTRIC devices.
Before installation, disconnect all sources of power to
NOTICE
the circuit to eliminate the risk of electrical shock.
ADVERTENCIA

RATINGS

DANGER
The DN9c and DN20c products are manufactured
and load-break rated in compliance with CSA
CAUTION
Standard C22.2 No. 182.1. The DN7c product is
manufactured and rated in compliance with CE
AVISO
Standards IEC 60309-1. 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
1-Phase
Device 120 V 208 V 240 V
HP FLA HP FLA HP FLA HP FLA HP FLA
(A) (A) (A)
DN9c 1/2 9.8 1 8.8 1.5 10
DN20c 1/6 4.4 1/3 4 1/2 4.9 1/2 3.9 1.5
3-Phase
Device 208 V 240 V
HP FLA HP FLA
(A) (A)
DN9c 2 7.5 3 9.6
DN20c 1 4.6 1 4.2
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
WARNING
product ratings are appropriate for the application;
and the conductor sizes are within the capacities of
DANGER
the terminals noted on Table 3.
Table 3 — Wiring Terminal Capacity* (in AWG)
CAUTION
Device
NOTICE
DN7c (50A)
DN9c
ADVERTENCIA
DN20c
DANGER
*Capacity is based on THHN wire sizes.
CAUTION
General Notes & Precautions
1. Self-tapping screws are provided for use with AVISO
INSDN K
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 specific application.
Table 4 - Wire Strip Length – Dimensions A
Device/Contacts
DN7c (50A) Contact
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 tighten-
ing torques are indicated in Table 5.
Table 5 - Terminal Screw Tightening Torques
Device/Contact
DN7c (50A) Contact
DN9c Contact
DN20c Contact
The DN9c and DN20c plugs and receptacles' contacts
are labeled with F or S numbers respectively. The
277 V 480 V
F-number on the inlet has a corresponding S-number
on the receptacle. See table 6 for details.
(A) (A)
2 10 3 8.5
5
Plug/Inlet
480 V
Contact Nos.
HP FLA
F1 (Ground)
(A)
F2
5 7.6
F3
3 4.8
F4-19
F20
Type*
RK1 NTD 35 A
RK5 TD 20 A
RK1 NTD 35 A
RK5 TD 20 A
Contacts
Min
10
16
16
Receptacle Plug/Inlet
Inches mm Inches
3/4 20 3/4
Contacts 1/2 13 1/2
Contacts 1/2 13 1/2
Torque Required Screwdriver
in-lbs N-m or Allen Wrench
13.3 1.5 5/64" hex head 2mm hex head
4.50 0.5 5/64" hex head 2mm hex head
4.50 0.5 5/64" hex head 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 DN9 and 50A DN7c products are used
WARNING
as in-line connectors, finger drawplates should be
installed on both the receptacle and plug in order
DANGER
to provide the user with the leverage to connect the
device (finger drawplates are not available).
CAUTION
NOTICE: The longer screws provided with the finger
Max
NOTICE
drawplates must be used when assembling devices
6
with finger drawplates because the shorter screws
10
ADVERTENCIA
provided with the handle are not long enough to
10
properly secure both the handle and drawplates to the
DANGER
inlet or receptacle and achieve a watertight connection.
CAUTION
Bushing
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 individu-
al wires to the lengths indicated in Table 2 and twist
mm
the strands of each conductor together.
20
13
Back out the terminal screws on the receptacle (or
13
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
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
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.