OPERATING INSTRUCTIONS
PN20/PN30
PN20HT/PN30HT
PN7c/PN12c
NSPN F
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eltric Corporation / 4640 Ironwood Drive Franklin, WI 53132
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Tel. : 800 433 7642 / Fax : 414 817 6161 / e-mail : mail@meltric.com
manufacturer of products using M arechal technology
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meltric.com
GENERAL
PN Series Standard Duty plugs and receptacles are
designed to offer superior safety, durability and
consistent, electrical contact performance. Please
follow the instructions below to ensure the proper
installation, operation and maintenance of this product.
RATINGS
Meltric’s PN7, PN20 and PN30 plugs & receptacles
are listed in accordance with UL 1682, CSA 22.2 No.
182.1 and IEC 60309-1. The PN12c is listed in
accordance with IEC 60309-1. The amperage,
voltage and environmental ratings are indicated in
Table 1.
Table 1 - General Ratings
Current
Interrupting
Non-Current
Interrupting
Voltage 600VAC 600VAC 600VAC 600VAC
Frequency
Environmental IP66+67 IP66+67 IP66/IP67 IP66/IP67
*PN20HT and PN30HT are current interrupting up to 480V only,
environmental rating is IP44.
INSTALLATION
PN Series plugs and receptacles should be installed
by a qualified person in accordance with all applicable
local and national electrical codes. Before starting,
verify that the power has been disconnected, all
product ratings are appropriate for the application
and the conductors meet code requirements and are
within the capacities of the terminals noted in Table 2.
NPT Guidelines are detailed in Table 3.
Table 2 — Wiring Terminal Capacity* (in AWG)
Model Wire Size
PN/20/30 14 8
PN/20HT/30/HT 14 8
PN7c 18 10
PN12c/PN12cSS 18 14
*Capacity is based on THHN wire sizes.
PN12 PN7 PN20 PN30
5A 15A 20A 20A
7A 20A 30A 30A
50- 400 Hz 50- 400 Hz 50-400 Hz 50-400 Hz
IP54/IP55 IP54/IP55
Min Max
Table 3 - NPT Guidelines
PT Cable Range
N
50” .062 - 0.50
.
.75” .187 - 0.75
.00” .437 - 1.10
1
.25” .750 - 1.375
1
1.50”* .890 - 1.650
.00”* 1.125 - 2.438
2
.50”* 1.750 - 2.565
2
* PN12cSS only
General Notes & Precautions
. This product must be installed by a certified
1
personnel.
2. Do not tin terminal wire ends.
. Do not use moisture repellent sprays on the contacts.
3
. Do not back terminal screws fully out.
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5. Self-tapping screws are provided for use with
ome polymeric accessories. High torque may
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be required to drive them in. Once they are
eated, care should be taken in order to avoid
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ver-tightening them against the plastic material.
o
!
. Meltric threaded handles come with tapered
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tyle threads. The use of fitting seal tape is
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recommended to maintain watertightness of
ll NPT fittings and joints.
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7. Various handles and cord grip options may be
used. These instructions are based on handles
provided with integral multi-layer bushing cord grips.
8. If the plug and receptacle are stainless steel then
stainless steel accessories must be used.
ENVIRONMENTAL
Optimum operating conditions are achieved by installing
IP66/IP67 plugs and receptacles with the latch at
the top.
To prevent water ingress, non-watertight plugs and
receptacles must always face downwards when
not mated.
Wire Strip Length
Wire strip lengths are indicated in Table 4. Strip
lengths for cable sheathing will depend on the
specific application. When used with handles, the
cable sheathing should extend into the handle to
ensure secure cord gripping.
Table 4 - Wire Strip Lengths – Dimension A
Device/Contact Inches mm Inches mm
PN20/30 3/8 10 3/ 8 10
PN20HT/30HT 3/8 10 3/ 8 10
PN7c 5/16 85/16 8
PN12c/PN12cSS 25/64 10 3 / 8 10
Terminal Screw Tightening Torques
The wiring terminals are spring-assisted to prevent
loosening due to wire strand settlement, vibration and
thermal cycling. Avoid over-tightening. Appropriate
tools and tightening torques are indicated in Table 5.
Table 5 - Terminal Screw Tightening Torques
Device/Contact in-lbs N-m or Allen Wrench
PN20/30 8 0.9 3 mm or 1/8” precision tip
PN20HT/30HT 8 0.9 3 mm or 1/8” precision tip
PN7c80.9 3 mm or 1/8” precision tip
PN12c/PN12cSS --crimp/solder type terminals
Receptacle Plug/Inlet
Torque Required Screwdriver
iring the Terminal Connections
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erify that power has been disconnected prior to
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iring the conductors to the plug and receptacle.
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Wiring must be made according to all applicable local
nd national electrical codes. Check that the rating
a
s correct for the installation. Follow the conductor-
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oding and terminal markings detailed in Table 6.
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his product must be electrically grounded. A
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grounding terminal is provided on all metal
ccessories, with a green screw and a washer.
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For Screw Type Terminals
Insert cable through handle and strip cable jacket to
dequate length. The cable jacket should extend at
a
east 1/2” into handle. Back out terminal screws only
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far enough for conductor to clear. Strip each
onductor per Table 4. Twist the strands of each
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conductor together and insert fully into the terminal.
ighten terminal screws per Table 5.
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PN12c Crimped/Soldered Terminal Wire Connections:
. Strip each conductor to 25/64-inches (10-mm).
1
2A. For 18-16 AWG wires, insert Ferrule into contact.
B. For 14 AWG Wires (max), the Ferrule is not required.
2
3. Insert stripped wire end into Ferrule or contact.
(Perform either step 4 or 5)
A. 18-16 AWG Wires – For Crimping the Contacts,
4
use either North American Contact Crimping Tool
4CN30 (using crimping slot 12-10) or Crimp
contact with European] Contact Crimping Tool
61-CA500 (using 4 MM slot).
4B. 14 AWG Wires – For Crimping the Contacts,
use either North American Contact Crimping Tool
4CN30 (using crimping slot 8) or Crimp contact
with European Contact Crimping Tool 61-CA500
(using 4 MM slot).
5. Caution: Soldering of the wire into the contact
must be performed with the contact out of the
Interior Insulator to prevent damage to the insulator.
• Using tin solder and a 50W soldering iron, heat
the terminal for approximately 30 seconds.
While heating, apply the soldering wire into the
hole at the bottom of the terminal and let it
penetrate by capillarity action. Let it cool down
without any mechanical stress.
6. Slide the Heat Shrink Insulation Sleeve over the
contact until it butts up against the contact
shoulder. Note: Sleeve must be applied for device
creepage insulation. Please see picture.
7. With a Heat Gun that has a temperature range
of 600°F to 950°F, apply heat evenly 360°
around the sleeve until it shrinks around the
contact and wire.
Assembly of PN12c Contacts
Once wired, the contacts must be inserted into the
rear of their respective insulating block. The rear
side of the inlet/plug or receptacle/connector is
considered as the flat surface of the 4-bolt hole
mounting surface.
Assembly Disassembly
. Before insertion of a contact into an insulator,
1
please review the insulator ’s contact numbering
cheme so the ground and each contact is
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laced into the proper hole.
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2. Push the wired contact into the insulating block
ntil it stops and snaps into place.
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3. Ensure its correct mounting by slightly pulling on
he contact.
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4. The male contacts are solid for their entire
ength and are inserted with the contact tip first
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nto the rear of the inlet/plug.
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5. The female contacts consist of a flexible braid
nd spring and are inserted with the contact tip
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first into the rear of the lidded receptacle/connector.
. Insert the Provided Hole Plugs into the unused
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oles in the front of each insulating block.
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Note: If a new Receptacle or Inlet is to mate with
previously installed device, pay particular
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attention to the number of contacts and
numbered position in the Receptacle or Inlet.
ontinuity will not be obtained unless the male
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and female contacts are evenly mated.
Disassembly of PN12c Contacts
. To remove the contact from the insulating block,
1
the provided Multi-Contact Removal Tool 9-LD12-37
must be used. From the front side of the insulating
block, slide the contact removal tool over the contact.
. Push until the contact pops out the back side of
2
the insulating block.
3. Caution: Each contact is designed to be
removed from the insulating block a maximum
of 3 times. New contacts should be used if
contacts are removed more than 3 times.
Table 6 - Conductor Coding and Terminal Markings
Terminal ID Function
“G”, “E” or GND
“N”
PN20/PN30/PN20HT/PN30HT Models
“1” or “R1” (Black)
“2” or “S2” (Red)
“3” or “T3” (Blue)
PN7c/PN12c Models
“1” to “6” or
“1” or “11”
Green equipment grounding conductor
only (or green with yellow stripe).
White or gray, system ground
(neutral conductor only “N”)
“Hot” conductors, no specific lettered terminal applies to any specific colored conductor
“Hot” conductors, no specific lettered terminal applies to any specific colored conductor
ASSEMBLY
Verify that power has been disconnected prior to assembly.
For In-Line Connections
Insert the cable through the handle and gasket. Strip
the cable jacket to provide a workable wire length,
being mindful that the jacket must extend into the
handle to achieve a secure grip. Then strip the wires
to the lengths indicated in table 4. When applicable
back out the terminal screws far enough (but not
completely) to allow the conductors to pass. Insert
the conductors fully into their respective terminals
and hand tighten to the torques indicated in table 5.
Bushing
Compression
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Strain
Relief
Handle
Receptacle (or Inlet)
Color-Coded
Gasket
or Mounted Receptacles / Inlets
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nsert the cable through the wall box and cut to allow
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adequate length. Strip the cable jacket to allow a
orkable wire length. Strip the individual cables to
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he lengths indicated on Table 4. When applicable
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back out the terminal screws far enough (but not
ompletely) to allow the conductors to pass. Insert
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the conductors fully into their respective terminals
nd hand tighten to the torques indicated in Table 5.
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ssemble the receptacle / inlet and the color gasket
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to the box with the appropriate hardware.
Mount with the latch or
awl at the top to
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ounteract the weight and
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train of the plug & cable.
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ole Pattern for Custom Mounting
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In applications where custom mounting to a panel or
box is desired, the clearance and mounting holes
hould be drilled as indicated in the following diagram
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and Table 7.
B
C
Table 7 - Custom Mounting Dimensions
Model Inches mm Inches mm Inches mm
PN20/30 2.00 50 1.65 42 .19 5.0
PN20HT/30HT 2.00 50 1.65 42 .19 5.0
PN7c 2.00 50 1.65 42 .19 5.0
PN12c 2.00 50 1.65 42 .19 5.0
PN12cSS 2.00 50 1.65 42 .19 5.0
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‘A’ ‘B’ ‘C’
B
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
TM
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, open the protective plug cap, align the
red dots on the plug and receptacle bodies, insert
plug into receptacle, apply force and rotate the plug
20° counterclockwise (CCW). The contacts will mate
and he circuit will close.
isconnection
D
o open the circuit and remove the plug, press the
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awl, apply inward force and rotate the plug 20°
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clockwise (CW). The plug can be safely withdrawn
rom the receptacle. The plug contacts remain
f
hrouded until after the circuit is disconnected.
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lose protective plug cap to prevent contamination
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y dirt, dust or other debris.
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OCKOUT PROVISIONS
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The plug cap can be locked with a locking pawl
xcept PNHT or PN12cSS.
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Screw: Plug inserted or cap closed, turn the 5 / 16”
crew with an Allen key until it reaches the bottom.
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Do not over tighten.
AINTENANCE
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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.
In wet / wash-down environments, the gaskets
should be inspected periodically (6 months) for
wear and hardness. Replace gaskets as needed.
• Verify the electrical continuity of the ground
circuit every 6 months.
• Check the contact surfaces for cleanliness and pitting.
Deposits of dust or debris can be rubbed off the
contacts with a clean cloth. Under no
circumstances
should the contact surfaces be filed since this will
remove the silver-nickel, butt-contact tip degrade
contact consistency. Sprays should not be used
since 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 qualified
personnel. This should only be done with the power
disconnected. Any repair or service must be
performed with genuine Meltric parts only.
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 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
TM
technology trademark. The use
of Meltric products in conjunction with mating devices
that are not marked with the TMtechnology
trademark shall void all warranties on the product.
Meltric Corporation is a member of the international
association, BECMA: the Butt-contact Electrical
Connectors Manufacturers Association.
For more information, visit, www.becma.ch.
INSPN F
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