• Low flammability
• Low smoke generation
• Low toxicity index
• Low generation of corrosive gases
• Small size, lightweight
Type 99M
Wire and cable
Type 99M wire has a dual wall
construction of radiation cross-linked
modified polyester. This combines
excellent mechanical performance and
chemical resistance with a range of
enhanced fire hazard properties. Type
99M wire is designed to meet the
stringent low hazard performance now
being specified by many authorities, in
particular for naval, mass transit and
industrial control panel wiring.
During the 1980’s there were major
changes in the demands of many wire
and cable specifications to reduce the
risks associated with all aspects of fire
hazards. Specifications such as
Def Stan 61-12 Part 18, have been
developed over the last decade
demanding improved performance of
wires and cables under fire conditions.
This has led to a tightening of the
requirements for flammability, smoke
generation, corrosive gas generation and
hazardous fume emission.
Type 99M wire achieves these
improvements in performance whilst
retaining small size, light weight,
flexibility, handleability, resistance to
carbon arc tracking and resistance to
chemicals and fluids.
Approvals
Raychem WCD 281
Def Stan 61-12 Part 18 Issue 4 Type 1
Italian Navy STN-SR-01
Lloyds Register
Type 99M wire and cable - nominal sizes, strandings and weights
Primary wires/screened and jacketed cables - 99M
99M011X (600 V)
primary wire
99M021X (1000 V)
primary wire
99M1111
screened & jacketed
99M1121
screened & jacketed
Size
26
24
22
20
18
16
14
12
Stranding
(mm)
19x0.10
19x0.12
19x0.15
19x0.20
19x0.25
19x0.30
37x0.25
37x0.32
OD
(mm)
0.88
0.98
1.13
1.40
1.65
1.90
2.25
2.60
Weight
(g/m)
2.0
3.0
4.4
6.5
9.9
14.15
18.62
25.7
OD
(mm)
1.01
1.17
1.37
1.57
1.85
2.10
2.50
2.97
Weight
(g/m)
2.2
3.4
4.9
7.3
10.9
14.5
21.8
31.3
OD
(mm)
1.80
1.90
2.05
2.30
2.55
2.95
3.13
3.48
Weight
(g/m)
7.5
9.2
11.1
14.6
19.3
24.9
30.9
43.4
OD
(mm)
2.91
3.20
3.52
4.02
4.57
5.13
5.72
6.42
Weight
(g/m)
13.3
16.6
20.5
27.7
37.1
48.5
60.5
86.0
Physical characteristics
Handleability
Type 99M wire has been designed to be readily
handleable by modern wiring and harnessing
techniques. It is a flexible wire with virtually no
springback once set. It is easily stripped with tools
such as conventional die-blade strippers.
Small size
Type 99M equipment wire has a nominal
0.2 mm insulation wall thickness which is
comparable to other established thin wall
wires such as Spec 44 wire.
Light weight
Type 99M wire is designed to have the
same weights as Spec 44 wire.
Type 99M
Typical properties
Test
Temperature rating
Voltage rating
Tensile strength/elongation of insulation
Notch propagation (0.05 mm notch)
Shrinkage 200°C
Low temperature bend
Voltage withstand
Insulation resistance (20°C)
Pliability rating
Fluid resistance
Fuels - aircraft
Oils - (ASTM No 3)
Solvents
BS G230
BS G230
BS G230
BS G230
BS G230
Def Stan 61-12 (18)
Def Stan 61-12 (18)
Pass
Pass
Pass
Method
BS G230
Raychem
Typical value
125°C
600 V thin wall
30 MPa/250%
Pass
<1%
-55°C
2.5 kV
1000 M ohms km (min)
82 - Pliable
Environmental properties
Mechanical performance
The scrape abrasion and cut through resistance
of Type 99M wire out performs the well-
established performance of Spec 44 wire
throughout its operating temperature range.
Fluid resistance
Type 99M wire demonstrates outstanding
resistance to most acids, alkalis, hydrocarbon
solvents, fuels, lubricants and water.
Electrical arc tracking
Type 99M wire is resistant to electrical arc
tracking under both wet and dry conditions
Voltage ratings
Standard available voltage ratings for Type 99M
wire are 600 V (0.2 mm wall thickness) and
1000 V (0.3 mm wall thickness).
Fire hazard characteristics
LLow Toxicity Index
Type 99M wire is designed to meet the low
hazardous fume emission levels required in
modern specifications.
For example, the change in the Toxicity Index
requirement from 1.5 to 0.2 between Issue 2
and Issue 3 of Defence Standard 61-12 (Part
18), is met by Type 99M wire.
Flammability
Type 99M wire has passed some of the most
stringent flammability tests, such as the test in
IEC 332 Part 3 (ladder test) and Underwriters
Laboratory for VW1 (individual wire).
Smoke generation
Type 99M wire has been designed to meet
stringent smoke tests such as those specified in
Def Stan 61-12 (Part 18) and in many mass
transit specifications.
Corrosivity
Type 99M wire has a low corrosive gas
emission, demonstrated by its low acid gas
value and meets the latest requirements of low
fire hazard specifications.
Fire hazard properties
Test
Flammability
Toxicity index
Smoke index
Acid gas equivalent
Method
IEC 332 Pt 3
Def Stan 61-12 (18)
Def Stan 61-12 (18)
TDE 76/P/76
Typical value
Pass
0.1 per metre of wire
8 per metre of wire
<1.5%
Type 99M
Part numbering system
99
X
X
X
X
X
Size-
X/X-
X
Jacket colour
(in accordance with MIL-STD-681, black
preferred)
Primary wire insulation colour
0=Black
3=Orange
7=Violet
1=Brown
4=Yellow
8=Grey
2=Red
5=Green
9=White
2L=Pink
6=Blue
Additional number after base colour
indicates stripe
Conductor size
Conductor type
1 - Tin-plated copper
9 - Bare copper
Number of conductors
1, 2, 3, 4 etc.
Class of wire
1 - 600V equipment wire
2 - 1000V equipment wire
Construction
0 - Primary wire & unscreened,
unjacketed cables
1 - Round braid screened & jacketed*
9 - Special construction
Wire type
M - Military wire
Basic specification number
*
The cable jackets are Raychem Zerohal and the preferred colour is black.
Typical ordering example
Two conductors, transit wire, black, red components, black jacket. Round braid screened,
size 20 conductor, 600 volt. Part number is 99T1121-20-0/2-0.
Raychem and Type 99M are trademarks of Raychem Interconnect, a division of Tyco Electronics
Corporation.
Raychem Wire and Cable
Faraday Road, Dorcan,
Swindon, Wiltshire SN3 5HH
Tel: (44)-1793-528171
Fax: (44)-1793-572516
All of the above information, including illustrations, is believed to be reliable. Users, however, should
independently evaluate the suitability of each product for their application. Tyco Electronics makes no
warranties as to the accuracy or completeness of the information and disclaims any liability regarding its use.
Tyco Electronics only obligations are those in the Standard Terms and Conditions of Sale for this product and in
no case will Tyco Electronics be liable for any incidental, indirect or consequential damages arising from the
sale, resale, use or misuse of the product. Tyco Electronics Specifications are subject to change without notice.
In addition Tyco Electronics reserves the right to make changes in materials or processing, without notification
to the Buyer, which do not affect compliance with any applicable specification.
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