Insulated Electrical Spring
Connector 312
Data Sheet
Application:
Use a 312 connector to electrically connect two or more wire
ends in a pigtail application and insulate the connection, or to
insulate a single wire end.
Regulatory Agencies:
U.L. Listed — as a Pressure Cable Connector
Tested per UL Standard 486C
U.L. File No. E23438
Wire Range:
AWG Range
COPPER conductors only, No. 22 thru No. 10 solid or
stranded wire.
METRIC Range
COPPER conductors only, 0.75 mm
2
thru 4,0 mm
2
rigid
(solid or stranded) and flexible.
(See wire matrix for specific wire combinations.)
LISTED 540H
Canadian Standards
Association
Standard NO. 22.2
NO. 188–M1983
3M File NO. LR15503
Construction:
Spring
Insulator
–Spring steel, Corrosion resistant coating
–Flame retardant nylon, Color–Yellow
IEC Publications
685–1 and 685–2–4
3M File NO. E95240
Weight:
0.004 lb. (1.8 gm)
Abbreviations:
UL: Underwriters Laboratories
AWG: American Wire Gauge
CU: Copper sol.: solid, str.: stranded, mm: millimeters,
mm
2
: square millimeters,
_C:
degrees Celsius,
_F:
degrees Fahrenheit, gm: gram,
lb.: pound
OPERATING TEMPERATURE: 105_C (221_F)
VOLTAGE RATING: 600 volts maximum building wire;
1000 volts maximum in signs and lighting fixtures
(luminaries).
Federal Specification W–S–610:
Commercial Package Only
Type
1
Class
1
Kind
cu
Style
G
Engineering Specification:
Electrical Spring Connector (3M™ part No. 312) shall be
capable of connecting wires within the range of No. 22 thru
No. 10 solid or stranded copper conductors, in a pigtail
application. The connector shall constructed of an active
(live) spring and covered by a nylon insulator. The spring
shall have a corrosion resistant coating. The connector shall
be UL Listed as a pressure cable connector, and be CSA
Certified. The connector shall be voltage rated 600 volts
maximum, building wire, 1000 volts maximum, signs,
fixtures and luminaries. The connector shall have a
maximum operating temperature of 105_C.
22
SOL
OR
STR
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
1
2
1
312
AWG Wire Combinations
copper to copper coductors
= 300 volts
= 600 volts
All 14 thru 10 AWG wire
combination are 600 volt UL
Listed when using insulation
such as TW and THHN
UL Listed single wire terminanations:
No. 8, 10, 12 and 14
LISTED 540H
20
SOL
OR
STR
18
SOL
OR
STR
16
STR
HOW TO READ THIS CHART
EXAMPLE 1:
2 No. 16 sol + 4 No. 16 sol (=6) may be
connected using a 312 connector
EXAMPLE 2;
16
SOL
14
STR
14
SOL
3 No. 14 str + 1 No. 14 str (=4)
may be connected using a
312 connector
12
STR
12
SOL
10
STR
10
SOL
1
1 2 3 4 5
22 SOL
OR STR
1 2 3 4 5
20 SOL
OR STR
1 2 3 4 5
18 SOL
OR STR
1 2 3 4
16
STR
1 2 3 4
16
SOL
1 2 3
14
STR
1 2 3
14
SOL
1 2
12
STR
1 2
12
SOL
Installation Instructions:
WARNING
Turn power off before installing or removing terminal.
All electrical work should be done according to
appropriate electrical codes.
1.
Strip wire insulation to length specified in , according to
size.
2.
Flrmly grasp wires, making sure insulation ends are even
and tightly bundled (wires may be twisted or untwisted).
Slip connector over wire.
3.
Turn connector onto wires in a clockwise direction until
secure.
4.
To remove, turn connector counter-clockwise.
Conductor Size
22 –16 AWG
(0,75 – 1,5 mm
2
)
14 – 8 AWG
(2,5 – 4,0 mm
2
)
Strip Length
5/8I
(15,9 mm)
1/2I
(12,7 mm)
—2—
Metric Wire Combinations
International Electrotechnical Commission
Rated Capacity: 1,5 – 10,0 mm
Voltage rating: 600 volts maximum
Reusability: Reusable for same capacity or larger
Wire Type: Copper only
See installation instructions for conductor strip lengths
I.E.C. Metric Wire Matrix:
Twist-on connecting devices for the combination of rigid
(solid or stranded) and flexible conductors.
Conductor Size
0,75 mm
2
1,0 mm
2
1,5 mm
2
2,5 mm
2
4,0 mm
2
Quantity
2–6
2–6
2–6
2–4
2
NOTE: Only AWG wire combinations are UL Listed
0.725I
(18,4 mm)
1.03I
(26,2 mm)
Live Action
Expandable
Steel Spring
Free
Expansion
Space
Flame
Retardant
Nylon
Insulator
Tightening
Fins
`3M' is a trademark of 3M.
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All statements, technical information and recommendations related
to the Seller's products are based on information believed to be
reliable, but the accuracy or completeness thereof is not
guaranteed. Before utilizing the product, the user should
determine the suitability of the product for its intended use. The
user assumes all risks and liability whatsoever in connection with
such use.
Any statements or recommendations of the Seller which are not
contained in the Seller's current publications shall have no force or
effect unless contained in an agreement signed by an authorized
officer of the Seller. The statements contained herein are made in
lieu of all warranties expressed or implied, including but not
limited to the implied warranties of merchantability and fitness for
a particular purpose which warranties are hereby expressly
disclaimed.
SELLER SHALL NOT BE LIABLE TO THE USER OR ANY OTHER
PERSON UNDER ANY LEGAL THEORY, INCLUDING BUT NOT
LIMITED TO NEGLIGENCE OR STRICT LIABILITY, FOR ANY
INJURY OR FOR ANY DIRECT OR CONSEQUENTIAL DAMAGES
SUSTAINED OR INCURRED BY REASON OF THE USE OF ANY
OF THE SELLER'S PRODUCTS.
Electrical Products Division
6801 River Place Blvd.
Austin, TX 78726-9000
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