Meltric PN12 Series User manual
GENERAL
P 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 P 7, P 20 and P 30 plugs & receptacles
are listed in accordance with UL 1682, CSA 22.2 o.
182.1 and IEC 60309-1. The P 12c is listed in
accordance with IEC 60309-1. The amperage,
voltage and environmental ratings are indicated in
Table 1.
INSTALLATION
P 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.
PT Guidelines are detailed in Table 3.
General Notes & recautions
1. This product must be installed by a certified
personnel.
2. Do not tin terminal wire ends.
3. Do not use moisture repellent sprays on the contacts.
4. Do not back terminal screws fully out.
5. Self-tapping screws are provided for use with
some polymeric accessories. High torque may
be required to drive them in. Once they are
seated, care should be taken in order to avoid
over-tightening them against the plastic material.
6. Meltric threaded handles come with tapered
style threads. The use of fitting seal tape is
recommended to maintain watertightness of
all PT fittings and joints.
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.
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.
Wiring the Terminal Connections
Verify that power has been disconnected prior to
wiring the conductors to the plug and receptacle.
Wiring must be made according to all applicable local
and national electrical codes. Check that the rating
is correct for the installation. Follow the conductor-
coding and terminal markings detailed in Table 6.
This product must be electrically grounded. A
grounding terminal is provided on all metal
accessories, with a green screw and a washer.
For Screw Type Terminals
Insert cable through handle and strip cable jacket to
adequate length. The cable jacket should extend at
least 1/2” into handle. Back out terminal screws only
far enough for conductor to clear. Strip each
conductor per Table 4. Twist the strands of each
conductor together and insert fully into the terminal.
Tighten terminal screws per Table 5.
N12c C imped/Solde ed Te minal Wi e Connections:
1. Strip each conductor to 25/64-inches (10-mm).
2A. For 18-16 AWG wires, insert Ferrule into contact.
2B. For 14 AWG Wires (max), the Ferrule is not required.
3. Insert stripped wire end into Ferrule or contact.
(Perform either step 4 or 5)
4A. 18-16 AWG Wires – For Crimping the Contacts,
use either orth American Contact Crimping Tool
4C 30 (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 orth American Contact Crimping Tool
4C 30 (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. ote: 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
Table 4 - Wire Strip Lengths – Dimension A
Receptacle lug/Inlet
Device/Contact Inches mm Inches mm
P 20/30 3/8 10 3/8 10
P 20HT/30HT 3/8 10 3/8 10
P 7c 5/16 85/16 8
P 12c/P 12cSS 25/64 10 3/8 10
Table 2 — Wiring Terminal Capacity* (in AWG)
Model Wire Size
Min Max
P /20/30 14 8
P /20HT/30/HT 14 8
P 7c 18 10
P 12c/P 12cSS 18 14
*Capacity is based on THH wire sizes.
Table 1 - General Ratings
N12 N7 N20 N30
5A 15A 20A 20A
7A 20A 30A 30A
Voltage 600VAC 600VAC 600VAC 600VAC
Frequency 50-400 Hz 50-400 Hz 50-400 Hz 50-400 Hz
Environmental IP66+67 IP66+67 IP66/IP67 IP66/IP67
IP54/IP55 IP54/IP55
*P 20HT and P 30HT are current interrupting up to 480V only,
environmental rating is IP44.
Table 3 - N T Guidelines
NT Cable Range
.50” .062 - 0.50
.75” .187 - 0.75
1.00” .437 - 1.10
1.25” .750 - 1.375
1.50”* .890 - 1.650
2.00”* 1.125 - 2.438
2.50”* 1.750 - 2.565
* P 12cSS only
Table 5 - Terminal Screw Tightening Torques
Torque Required Screwdriver
Device/Contact in-lbs N-m or Allen Wrench
P 20/30 8 0.9 3 mm or 1/8” precision tip
P 20HT/30HT 8 0.9 3 mm or 1/8” precision tip
P 7c80.9 3 mm or 1/8” precision tip
P 12c/P 12cSS --crimp/solder type terminals
Current
Interrupting
Non-Current
Interrupting
!
PN20/PN30
PN20HT/PN30HT
PN7c/PN12c
OPERATING INSTRUCTIONS
Meltric Corporation / 4640 Ironwood Drive Fr nklin, WI 53132
INSPN F
A m nuf cturer of products using Marechal technology
meltric.com
1. Before insertion of a contact into an insulator,
please review the insulator’s contact numbering
scheme so the ground and each contact is
placed into the proper hole.
2. Push the wired contact into the insulating block
until it stops and snaps into place.
3. Ensure its correct mounting by slightly pulling on
the contact.
4. The male contacts are solid for their entire
length and are inserted with the contact tip first
into the rear of the inlet/plug.
5. The female contacts consist of a flexible braid
and spring and are inserted with the contact tip
first into the rear of the lidded receptacle/connector.
6. Insert the Provided Hole Plugs into the unused
holes in the front of each insulating block.
ote: If a new Receptacle or Inlet is to mate with
a previously installed device, pay particular
attention to the number of contacts and
numbered position in the Receptacle or Inlet.
Continuity will not be obtained unless the male
and female contacts are evenly mated.
Disassembly of PN12c Contacts
1. To remove the contact from the insulating block,
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.
2. Push until the contact pops out the back side of
the insulating block.
3. Caution: Each contact is designed to be
removed from the insulating block a maximum
of 3 times. ew contacts should be used if
contacts are removed more than 3 times.
ASSEMBLY
Verify that power has been disconnected prior to assembly.
Fo 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.
Fo Mounted Receptacles / Inlets
Insert the cable through the wall box and cut to allow
adequate length. Strip the cable jacket to allow a
workable wire length. Strip the individual cables to
the lengths indicated on 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.
Assemble the receptacle/inlet and the color gasket
to the box with the appropriate hardware.
Hole attern 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.
O ERATION
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.
Disconnection
To open the circuit and remove the plug, press the
pawl, apply inward force and rotate the plug 20°
clockwise (CW). The plug can be safely withdrawn
from the receptacle. The plug contacts remain
shrouded until after the circuit is disconnected.
Close protective plug cap to prevent contamination
by dirt, dust or other debris.
LOCKOUT ROVISIONS
The plug cap can be locked with a locking pawl
except P HT or P 12cSS.
Screw: Plug inserted or cap closed, turn the 5 / 16”
screw with an Allen key until it reaches the bottom.
Do not over tighten.
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.
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 RES ONSIBILITY
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 TM technology
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.
I SP F
C
A
B
B
Table 7 - Custom Mounting Dimensions
‘A’ ‘B’ ‘C’
Model Inches mm Inches mm Inches mm
P 20/30 2.00 50 1.65 42 .19 5.0
P 20HT/30HT 2.00 50 1.65 42 .19 5.0
P 7c 2.00 50 1.65 42 .19 5.0
P 12c 2.00 50 1.65 42 .19 5.0
P 12cSS 2.00 50 1.65 42 .19 5.0
Mount with the latch or
pawl at the top to
counteract the weight and
strain of the plug & cable.
Table 6 - Conductor Coding and Terminal Markings
Terminal ID Function
“G”, “E” or G D
“ ”
N20/ N30/ N20HT/ N30HT Models
“1” or “R1” (Black)
“2” or “S2” (Red)
“3” or “T3” (Blue)
N7c/ N12c Models
“1” to “6” or
“1” or “11”
“Hot” conductors, no specific lettered ter-
minal applies to any specific colored conductor
“Hot” conductors, no specific lettered ter-
minal applies to any specific colored conductor
White or gray, system ground
(neutral conductor only “ ”)
Green equipment grounding conductor
only (or green with yellow stripe).
Compression
ut
Handle
Strain
Relief
Color-Coded
Gasket
Receptacle (or Inlet)
Bushing
This manual suits for next models
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