Bsi bs en 03155 055 2006

BRITISH STANDARD

Aerospace series —
Electrical contacts used
in elements of
connection —
Part 055: Contacts, electrical, female,
thermocouple NiAl, type C, crimp,
class T — Product standard

The European Standard EN 3155-055:2006 has the status of a British
Standard

ICS 49.060

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BS EN
3155-055:2006


BS EN 3155-055:2006

National foreword
This British Standard was published by BSI. It is the UK implementation of
EN 3155-055:2006.
The UK participation in its preparation was entrusted by Technical Committee
ACE/6, Aerospace avionic electrical and fibre optic technology, to
Subcommittee ACE/6/-/3, Aerospace — Connectors.
A list of organizations represented on ACE/6/-/3 can be obtained on request to
its secretary.

This publication does not purport to include all the necessary provisions of a
contract. Users are responsible for its correct application.
Compliance with a British Standard cannot confer immunity from
legal obligations.

This British Standard was
published under the authority
of the Standards Policy and
Strategy Committee
on 31 October 2006

© BSI 2006

ISBN 0 580 49467 5

Amendments issued since publication
Amd. No.

Date

Comments


EUROPEAN STANDARD

EN 3155-055

NORME EUROPÉENNE
EUROPÄISCHE NORM

July 2006

ICS 49.060

English Version

Aerospace series - Electrical contacts used in elements of
connection - Part 055: Contacts, electrical, female,
thermocouple NiAl, type C, crimp, class T - Product standard
Série aérospatiale - Contacts électriques utilisés dans les
organes de connexion - Partie 055 : Contacts électriques,
femelles, thermocouple NiAl, type C, à sertir, classe T Norme de produit

Luft- und Raumfahrt - Elektrische Kontakte zur Verwendung
in Verbindungselementen - Teil 055: Elektrische
Thermobuchsenkontakte NiAl, Typ C, crimpbar, Klasse T Produktnorm

This European Standard was approved by CEN on 9 March 2006.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36

© 2006 CEN

All rights of exploitation in any form and by any means reserved
worldwide for CEN national Members.

B-1050 Brussels

Ref. No. EN 3155-055:2006: E


EN 3155-055:2006

Contents

Page

Foreword..............................................................................................................................................................3
1

Scope ......................................................................................................................................................4

2

Normative references ............................................................................................................................4

3

Definitions ..............................................................................................................................................5

4
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9

Required characteristics.......................................................................................................................5
General....................................................................................................................................................5
Dimensions and mass...........................................................................................................................5
Marking by colour code ........................................................................................................................6
Material ...................................................................................................................................................7
Permissible cables ................................................................................................................................7
Tooling ....................................................................................................................................................8
Cable stripping.......................................................................................................................................9
Tests........................................................................................................................................................9
Quality assurance ............................................................................................................................... 10

5

Designation ......................................................................................................................................... 11

6

Marking ................................................................................................................................................ 11

7

Technical specification ...................................................................................................................... 11

2


EN 3155-055:2006

Foreword
This European Standard (EN 3155-055:2006) has been prepared by the AeroSpace and Defense Industries
Association of Europe - Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of ASD,
prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by January 2007, and conflicting national standards shall be withdrawn at
the latest by January 2007.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden,
Switzerland and the United Kingdom.

3

EN 3155-055:2006

1

Scope

This standard specifies the required characteristics, tests and tooling applicable to female contacts,
thermocouple, NiAl, type C, crimp, class T, used in elements of connection according to EN 3155-002.
It shall be used together with EN 3155-001.
The associated male contacts are defined in EN 3155-054.

2

Normative references

The following referenced documents are indispensable fort he application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 2591 (all parts), Aerospace series – Elements of electrical and optical connection – Test methods
EN 3155-001, Aerospace series – Electrical contacts used in elements of connection – Part 001: Technical
specification
EN 3155-002, Aerospace series – Electrical contracts used in elements of connection – Part 002:List and
utilization of contacts
EN 3155-054, Aerospace series – Electrical contacts used in elements of connection – Part 054: Contacts,
electrical, male, thermocouple NiAl, type C, crimp, class T – Product standard
EN 4049 (all parts), Aerospace series – Thermocouple extension cable – Operating temperatures
between -65 °C and 260 °C
ISO 8056-1, Aircraft – Nickel-chromium and nickel-aluminium thermocouple extension cables – Part 1:

Conductors – General requirements and tests
ISO 8843, Aircraft – Crimp-removable contacts for electrical connectors – Identification system
MIL-DTL-22520G, Crimping Tools, Wire Termination, General Specification for … 1)
MIL-C-22520/1C, Crimping Tools, Terminal, Hand, Wire Termination for Wire Barrel Sizes 12 through 20 1)
MIL-C-22520/2C, Crimping Tools, Terminal, Hand, Wire Termination for Wire Barrel Sizes 20 through 28 1)
MIL-C-22520/7B, Crimping Tools, Terminal, Hand, Wire Termination for Wire Barrel Sizes 16, 20 and 22 1)
MIL-I-81969B, Installing and Removal Tools, Connector Electrical Contacts, Type II, Class 2, Composition C 1)
MIL-I-81969/14C, Installing and Removal Tools, Connector Electrical Contact, Type III, Class 2,
Composition B 1)
MIL-I-81969/30, Installing and Removal Tools, Connector Electrical Contact, Type II, Class 2, Composition C,
for Unwired Contacts 1)

1

)

4

Published by: Department of Defense (DOD), the Pentagon, Washington D.C. 20301 USA.


EN 3155-055:2006

3

Definitions

For the purposes of this standard, the definitions given in EN 3155-001 apply.

4

4.1

Required characteristics
General

Type C contacts are for thermocouple application. Class T corresponds to an operating temperature range
from – 65 °C to 260 °C.

4.2

Dimensions and mass

See Figure 1, Figure 2 and Table 1.
Dimensions in millimetres

Key
1
2

Diameter H (one side only)
0,25 max. See note 1.

3
4

G max. See note 2
Marking, see 4.3.

NOTE 1

Clearance between sleeve and the body of the contact.

NOTE 2

Position of the point of electrical contact.

Figure 1

5


EN 3155-055:2006

Figure 2 – Barrel, contact sizes 16-18
Table 1
Size

A

C

D

E

F

G

H

Contact

Barrel

max.

20

20

16,66

12,32
12,17

4,34
4,06

0,84
0,74

1,98
1,93

1,05

1,14

0,81

0,66

20

18

16,66

12,32
12,17

4,34
4,06

0,84
0,74

1,98
1,93

1,05

1,14

0,81
0,66

16

16

19,28

12,70
12,55

6,53
6,25

1,22
1,12

2,87
2,79

1,63

1,27

1,07
0,91

16

18

19,28

12,70
12,55

6,53
6,25

1,22
1,12

2,87
2,79

1,63

1,27

1,07
0,91

Size

4.3

B

J

K

L

M

N

P

T

S

min.

Mass
g

Contact

Barrel

20

20

1,68
1,57

4,72
3,99

1,27
1,22

1,98
1,93

2,62
2,54

1,52

1,73
1,35

–

0,31

20

18

1,68
1,57

4,72
3,99

1,35
1,30

1,98

1,93

2,62
2,54

1,52

1,73
1,35

–

0,31

16

16

2,26
2,11

7,21
6,35

1,73
1,68

2,62
2,56

3,38
3,30

2,21

2,16
1,73

–

0,68

16

18

1,68
1,57

7,21
6,35

1,35
1,30

1,98
1,93

3,38
3,30

2,21

2,16
1,73

2,62
2,56

0,68

Marking by colour code

Marking shall be in accordance with ISO 8843 and Table 2. Either the alloy type or coloured dot shall be used
to identify the contact material.

6


EN 3155-055:2006

4.4

Material

NiAl (no protective plating)

4.5

Permissible cables

Cables shall be in accordance with EN 4049-002 and Table 3.
Table 2

Figure 3
Size

Colour

Contact

Barrel

Band 1

Band 2

20

20

Red

Red

20

18

Red

Brown

16

16

Blue

Blue

16

18

Blue

Brown

Key
1 White dot
2 Black dot
3 Band 1
4 Band 2
a

Alloy type identification to be produced by engraving, stamping or pressing without deformation of the contact.

7

EN 3155-055:2006

Table 3
Size

a

4.6

Size of conductors

Contact

Barrel

AECMA code

Section
mm²

AWG a

20

20

006
004

0,60
0,40

20
22

20

18

010
006
004

1,00
0,60
0,40

18
20
22

16

16

012
010
006

1,20
1,00
0,60

16
18
20

16

18

010
006
004

1,00
0,60
0,40

18
20
22

AWG – nearest American Wire Gauge.

Tooling

4.6.1

Crimping tools

Conform to MIL-DTL-22520, see Table 4.
The selector numbers used for crimping Ni and Al alloy conductors in cables EN 4049 are indicated in Table 4.
These selector numbers shall be used for qualification of the contacts and in service, unless otherwise
specified by the user.
Table 4
Contact

Cable size

Contact Barrel AECMA
AWG a
size
size
code
20

20

16

16

a

8

20

18

16

18

004

22

006

20

004

22

006

20

010

18

006

20

010

18

012

16

004

22

006

20

010

18

AWG – nearest American Wire Gauge.

Tools M22520/1-01
Turret
M22520/1-02
Red

Tools M22520/2-01

Selector

Selector
Selector
Positioner
Positioner
number
number
number
3
4

M22520/2-02

3
M22520/1-02
Red

Tools M22520/7-01

4

6
7

M22520/7-02

6
M22520/2-02

5

7

M22520/7-02

8

3
M22520/1-02
Blue

4
5

6
7
5

M22520/7-03

5
6

6
5

4
M22520/1-02
Blue

5

6
7

Not
applicable

5
M22520/7-03

6
7


EN 3155-055:2006

4.6.2

Contact insertion/extraction tools

Conforming to MIL-I-81969 and Table 5.
Table 5
Size

4.7

Contact

Barrel

20

20

20

Extraction tools

Insertion tools

Wired contact

Unwired contact

M81969/14-11

M81969/14-11

M81969/30-05

18

M81969/14-11

M81969/14-11

M81969/30-05

16

16

M81969/14-03

M81969/14-03

M81969/30-06

16

18

M81969/14-03

M81969/14-04

M81969/30-06

Cable stripping

See Table 6.

4.8

Tests

See Table 7.
Table 6
Size
Contact

Barrel

20

20

20

18

16

16

16

18

Stripped length of cable
mm
± 0,5

4,5

6,8

9

EN 3155-055:2006

Table 7
Applicable
Designation of
According to
the test
EN 3155-001

EN 2591-

Designation of the test

101

Visual examination

X

102

Examination of dimensions and
mass

X

201

Contact resistance - Low level

X

220

Contact/Conductor joint ageing
by current and temperature
cycling

X

301

Endurance at temperature

X

305

Rapid change of temperature

307

Salt mist

402

Shock

X

403

Sinusoidal and random
vibration

X

406

Mechanical endurance

X

415

Test probe damage (female
contact)

416

Contact bending strength

X

417

Tensile strength (crimped
connection)

X

418

Gauge insertion/extraction
forces (female contact)

X

502

Restricted entry

X

503

Contact deformation after
crimping

507

Plating porosity

X

508

Measurement of thickness of
coating on contacts

X

4.9
4.9.1

X

Remarks

TA = (-65 ± 2) °C
TB = (260 ± 2) °C

X

X

X

Quality assurance
Inspection conditions for manufacturing lots

A sample shall be taken from each batch of wire or rod used to manufacture thermocouple contacts and
tested in accordance with ISO 8056-1 except the thermo-electric tests on conductors of finished cables shall
use the EMF measurement by method of direct comparison against platinum and not a substandard.

10


EN 3155-055:2006

5

Designation

EXAMPLE
Description block

CONTACT, ELECTRICAL

Identity block

EN3155-055 F 20 20

Number of this standard
Type of contact: F: female
Contact size (see Table 1)
Barrel size (see Table 1)
NOTE

6

If necessary, the code I9005 shall be placed between the description block and the identity block.

Marking

See EN 3155-001.

7

Technical specification

See EN 3155-001.

11


BS EN
3155-055:2006

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