Document BR5gBY8XVyxvzqZg6NLE23Nam
NEW FROM ROCKBESTOS
I ~s flAMVPS
Ti*'
j frA'i-hJt. E-193
)
FIREWALL ZH-125
High Performance, Zero-Halogen, Low Smoke 125C Transit Car Wiring
THE PROBLEM
"The hazard of fire has long been a concern of the transportation industry. Recent studies have shown that incapacitation or death from smoke is more probable than from fire. In the crowded, confined en vironment of a rapid transit vehicle, the smoke emis sion from all sources must be eliminated. The pro blem of smoke is compounded by the possibility of toxic fumes in the smoke. The use of halogenated compounds and halogenated monomers as flame retardants brings with it the problem of hydrogenhaiogenated toxic gasses."
Study by Boeing Aircraft Co. for The U.S. Dept, of Transportation. Dec., 1978
THE CHALLENGE
At the Sixth Congress of the UITP Working Group for the Protection of Electrical Cables for Metros (Stockholm, 1979) it was concluded that the materials and technologies were currently available to develop wire and cable products with significantly improved fire characteristics approaching the "smokeless cable."
As a follow-up to this Congress, the American Public Transit Association (APTA) and the European members of the International Union of Public Transports (UITP) created a special task force to prepare a performance specification for the development of such improved wire and cable products. It was hoped that this action would provide the impetus for the wire and cable industry to respond to this challenge. The goals of that performance specification were:
"It is expected that the manufacturer will use his expertise with a balanced approach, to develop wire and cable products with improved characteristics that can better meet the needs of the rapid transit industry."
"The manufacturers proposed compound(s) for wire and cable should not provide fuel for fire nor contribute to full fire development. Secondly, the smoke, toxic and corrosive off-gases evolved during the combustion of materials should be in very small quantities and should not include halogen and sulfur compounds."
THE PROJECT
In 1981, Rockbestos engineers initiated a project to meet the challenge presented by the rapid transit in
dustry and develop a new wire and cable product that fully utilized state-of-the-art materials and produc
tion technology. The guidelines of this project included:
No Halogen
-- for reduced toxicity and corrosivity
Low Smoke
-- for improved life safety
,
High Temperature -- for improved ampacities, reduced diameter and longer life
Flame Retardant -- to deter flame propagation
These improvements were to be made without sacrificing the electrical and mechanical characteristics
necessary for long product life in transit car service. The objective was to develop a unique product which
fulfilled the stated industry needs, while obtaining the best possible balance of cable properties.
THE SOLUTION
From an engineering standpoint, the solution was developed with the realization that no existing single polymeric material could achieve ail the stated needs of the transit industry. A dual layer system was con ceived to meet these requirements. A careful design process was undertaken to select material combina tions and to evaluate their optimum proportions. With Firewall 2H-125. Rockbestos has developed a truly superior, zero-halogen, low-smoke, 125 C wire with excellent electrical and mechanical properties. It is flexible for ease'of installation, and of reduced diameter and weight when compared to conventional car wiring products.
Firewall ZH-125 represents the "balance" of characteristics that you have asked for. It is available today. It is the only responsible choice where life safety is in the balance.
RBB 02839
v
ACID GAS GENERATION:
Firewall ZH-125 has zero halogen content. This is a unique property when compared to current car wiring products. Rockbestos has chosen the very discriminating Schoniger Flask test method (ASTM E-205) to demonstrate comparative corrosive combustion by-products. This method was chosen because of its:
reproducibility ability to capture all combustion by-products ability to measure all types of acids generated capacity to measure the products of complete specimen
combustion which is more representative of a real fire condition.
* MATERIAL
IRRADIATED CROSS-LINKED
POLYOLEFIN
LOW SMOKE
HYPALONf HYPALON
(CSPE)
(CSPE)
TEFZELt (ETFE)
ROCKBESTOS FIREWALL- ZH-125
i Typical j Values*
2.8
2.7 2.9 20.2
'MilliequivaJent of acid per gram of sample.
Q
/
SMOKE GENERATION:
Firewall ZH-125 has been formulated to produce minimum smoke when burned. For evaluation purposes typical values of current car wiring products are compared. Results were obtained using an NBS smoke chamber (ASTM E-662) and materials molded into 100 mil slabs. Results are listed for both flaming and non-flaming modes.
MATERIAL
MODE
Ds4
Dm
IRRADIATED CROSS-LINKED POLYOLEFIN
F 500 550 NF 250 500
HYPALON (CSPE)
F 700 800 ' NF 500 700
LOW-SMOKE HYPALON (CSPE)
F 250 350 NF 300 400
TEFZEL (ETFE) A
F 20 270 NF 15 20
FIREWALL ZH-125 AA
F 25 150 NF 25 170
Ds = Specific Optical Density <@ 4 minutes Unknown Slab Thickness Dm = Maximum Specific Optical Density Each layer of composite tested
separately, results represent worst case
ACCELERATED MOISTURE ABSORPTION
Firewall ZH*125's primary dielectric layer exhibits excellent elec trical characteristics when tested to the EM-60 method in 75 C water. The test is performed prior to the application of the secondary extru sion. The results indicated below are typical of the performance which can be expected.
SIC after 1 Day
Inc. Cap. 1-14 Days Inc. Cap. 7-14 Days Stability Factor Alternate Stability Factor
3.3 0.5 0.3 0.3 0.1
tDuPonl Registered Trademark
RBB 02840
SALES OFFICES
ATLANTA
2971 Flowers Road. South. Atlanta. GA 30341 404-451-3737 800-221-0148
AVENEL
4 Cragwood Road. P.O. Drawer A Avenel, N.J. 07001 201-381-2170 800-211-0148
BOSTON
19 West Main Street WestDorough. MA 01581 6! 7-366-1413 800-243-0017
CHICAGO
4415 W. Harrison St. Suite 415, (Box 93) Hillside. IL 60162 312-379-2265 800-762-0076
'
CLEVELAND
21010 Center Ridge Road, Rocky River, OH 44116 216-333-8640
DALLAS
2995 L8J Freeway, Dallas. TX 75234 214-484-1077 800-231-6649
DENVER 6000 East Evans Avenue Denver. CO 80222 303-759-3191 800-762-0076
HOUSTON P.O. Box 18111. 1945 Teiiepsen Street Houston, TX 77223 713-923-7692 800-231-6649
LOS ANGELES 13455 Ventura Boulevard, Sherman Oaks. CA 91423 213-872-1610 800-762-0076
NEW ORLEANS 440 North Foster Drive, Baton Rouge, LA 70806 504-928-5944 800-231-6649
PHILADELPHIA Cedar Brooke Building Taunton Boulevard & Tuckerton Road Medford, NJ 08055 609-654-1738 800-221-0148
PITTSBURGH 1910 Cochran Road, Manor Oak i PittsDurgh. PA 15220 412-343-5022
ST. LOUIS 200 South 8emiston Avenue Clayton, MO 63105 314-721-2498 800-762-0076
SAN FRANCISCO 366 Rose Street Danville. CA 94526 415-838-8634 800-762-0076
HEADQUARTERS 860 North Main Street Ext. P.O. Box 5778 Wallingford. CT 06492 203-265-6500 TWX 710-476-0050
INTERNATIONAL SALES 860 North Main Street Ext. P.O. Box 5778 Wallingford, CT 06492 203-265-6500 TWX 710-476-0050 TELEX RCKBEST INT 956042
Copyright 1963 The RocXWStos Company -- division ot CEROCK Wire & Cable Group. Inc.
THE ROCKBESTOS COMPANY
Oivision of CEROCK Wire & Cable Group. Inc.
RBB 02841
J
v\
MECHANICAL PERFORMANCE
To demonstrate Firewall ZH-125's resistance to mechanical abuse the following three industry recognized tests were chosen. All tests were performed on 14 AWG samples and the results indicated are typical of the performance which can be expected.
1 SCRAPE ABRASION ' G.E. Scrape Abrader
12 Mil Radius Tool 3/8" Stroke. 60 CPM
1,500 Gram Load
Strokes to Penetration 24,000 Strokes (12.000 Cycles)
DYNAMIC CUT THROUGH Instron Type Tester 1/16" Radius Tool 0.2 Inch/Minute
Lbs. to Electrical Short 700 Lbs.
DYNAMIC CRUSH instron Type Tester
2" Plates 0.2 Inch/Minute
Lbs. to Electrical Short Exceeds 2,000 Lbs.
k1
FLAME RESISTANCE
Firewall ZH-125 is composed of highly flame retardant materials which enable it to readily pass the very stringent VW-1 verticle flame test per UL Standard 44.
HEAT RESISTANCE
Heat resistance is essential for long service life at rated temperature. Firewall ZH-125 exhibits excellent heat aging properties. When judged by UL standards (168 hours @ 158 C), its level of retention of original physical properties justifies the 125` C continuous uonuudor temperature rating.
OIL RESISTANCE
To demonstrate the superior oil resistance of Firewall ZH-125, a 14 AWG sample was immersed for 100 hours in a hot oil bath of ASTM No. 2 oil heated to 150C 2C. The sample showed less than 30% volume swell with no cracks or splits.
SUMMARY
The above cable test results have been chosen to highlight some of the unique and outstanding pro perties of Firewall ZH-125. More complete data is available upon request
A review of the excellent characteristics offered by the product, would indicate that Rockbestos has achieved its goal in developing a zero-halogen car wire with the best balance of properties.
Feel confident that when the burden of life safety is in your hands, you can tip the scale in your favor with Rockbestos Firewall ZH-125.
RBB 02842
Rockbestos' new one conductor Firewall1 ZH-125 transit car wire is rated 0-2000 volts and has a con tinuous conductor temperature rating of 125 C. It is composed of flexibly stranded coated copper con ductor insulated with a dual layer of extruded composite insulation. These two layers are divided to
provide the best possible balance of cable properties. It is available in sizes 22 AWG through 10 AWG.
DIMENSIONAL DATA
CATALOG NUMBER
AWG
CONDUCTOR
WEIGHT
INSULATION
CABLE
AMPACITY
SIZE STRANDING NOM. O.D. (IN.) LBS/MFT THICKNESS (IN.) NOM. OD. (IN.) 125 *C*
RR082201
22 19/.0063
.032
6 .030
RR082001 20 19/.0080
.040
8 .030
RR081001
18 19/.0100
.050
11
.030
nRGolSGi
110 4 ^ f A4 T it
i * wvv
RR081401
14 19/.0147
.071
20
.030
RR081201
12 19/.Q185
.089
29
.030
RR081001
10 27/.0201
.124
44
.030
.095 14 .103 18 .113 23 .122 30 .134 39 .152 52 .187 72
-NOTE: Ampacities: The current ratings listed above are based on ICEA method of calculating per their Publication P-46-426 for insulated isolated cable in tree air with a 40* C ambient temperature and a conductor temperature of 125* C.
THE COMPANY
The Rockbestos Company is no stranger to difficult challenges. Since 1918 the company has specialized in high temperature, high performance wire and cable with notable success, resulting in an international reputation for engineering expertise.
The company, especially, has furnished cable for a variety of difficult environments where depend ability has been of the utmost importance. Rockbestos has concentrated on heavy industrial applica tions including: metals, petrochemicals, mining machinery, nuclear utilities, glass and railroad/rapid transit. The company has a number of significant "firsts" in flame retardant applications, including the first flame retardant railroad cable (1336). the first flame retardant mining machinery cable (1942) and the first flame retardant utility conboi cable (13G3).
With this experience, Rockbestos is well equipped to deal with the very real concerns of life-safety in the transit industry.
!? ?: P'^Oucuon plant tor high voltage power cable completed in 1981. Located m Troutman. NC. it is trie most modern and
efficient facility of its kind in North America.
RBB 02843