The handling of the 'distortion' is mainly dependent on what kind of
jacket you got, and they are many, see below.
If you can give us the type of material, I think TN have experienced people
that can help you.
Inge
PVC -- Polyvinyl chloride (vinyl), a general-purpose plastic jacket material
used for cables. Low in cost, flexible, and widely used as a cable jacket
for many applications- computers, communications, low-voltage wiring, etc.
In the cable world, "PVC" is often used to denote a cable that is not
suitable for use in a plenum airspace. PVC can potentially be dangerous in a
fire situation, releasing heavy smoke and hydrogen chloride gas, which can
be irritating to humans and corrosive to electronic devices. PVC cables
often have a CM, CMG, or CMR rating as defined by the National Electrical
Code (NEC).
CM/CMG -- Communications cable for general purpose use. Intended for general
use within buildings in accordance with the NEC Article 800.53(E)(1). These
cables do not spread flame to the top of a tray in the Vertical-Tray Flame
Test described in the UL 1865 standard. As a general rule, CM and CMG cables
are suitable for installation in cable trays and other non-plenum/non-riser
areas.
CMR (Riser) -- Cable that is suitable for use in a riser application. In
commercial buildings, a riser is the space used by vertical
telecommunications infrastructure, connecting from one floor to another. CMR
indicates cable intended for use within buildings in vertical shafts in
accordance with Section 800.53(B) of the NEC. The test used for CMR cables
is defined in the UL 1666 standard, which limits flame propagation height.
CMP (Plenum) -- "Plenum" cables are purposefully built with a jacket made of
materials that give off low amounts of smoke and which retard the spread of
flames. The word "plenum" refers to an airspace used for air circulation by
an HVAC system, such as a
drop ceiling or a raised floor. One popular jacket material is FEP
(fluorinated ethylenepropylene), which is a softer, more pliable version of
TeflonŽ (also known as PTFE- polytetrafluoroethylene). Even though "plenum
cables" are usually identified as separate from "PVC cables", PVC compounds
are often used in the construction of plenum jacket material. CMP is a
classification of cables defined by the NEC for cables designed to be
installed into a building's plenum airspaces. The most popular test for CMP
cables is defined by the NFPA 262 standard, which outlines criteria for both
low-smoke and flame-travel performance.
LSZH -- Low Smoke Zero Halogen. These cables are built with a jacket
material free from halogenic materials (such as chlorine and fluorine),
because of the toxic nature of these chemicals when burned. However, LSZH
cables have not been specified by the NEC for use in installations in the
US, and they may have questionable flammability characteristics. LSZH cables
are used primarily in Europe.
OFNR -- Optical Fiber Non-conductive Riser-fiber optic cables without any
conductive metal structures (such as strength members or vapor barriers)
that are approved for use in a riser application. Most fiber optic cables
are constructed of materials that do not conduct electricity (glass,
plastic, Kevlar, etc.).
OFNP -- Optical Fiber Non-conductive Plenum-similar to the fiber optic cable
described above, but with a jacket suitable for plenum airspaces.
CL2/CL3 -- Cable designed for a Class 2 or Class 3 circuit, as defined by
the NEC Article 725. CL2/CL3 cables are typically used for low-voltage
applications other than power or communications; such as speakers,
audio/video signals, or computer data. The specification for CL2/CL3 cables
is designed to provide protection from both fire and electric shock. CL2
circuits are limited to up to 100VA of power at 30V, and up to 0.5VA between
30V and 150V. CL3 circuits can provide up to 100VA of power up to 150V. For
most applications, CL3 cables can be installed in CL2 circuits, but CL2
cables cannot be used for CL3 circuits.
SVT -- Service Vacuum Thermoplastic. This is a definition for jackets used
primarily on power cords for vacuum cleaners, fans, and portable lights. SVT
is a flexible jacket designed for indoor use only. SVT is outlined in NEC
Article 400.
SJT -- Service Junior Thermoplastic. Another jacket used for power cords,
designed for hard usage indoors. This is commonly found on many universal
power cords used for computers and other electronic devices. Also described
in NEC Article 400.
----- Original Message -----
From: "Gyorke, Chad (SA-1)" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, October 20, 2010 4:51 PM
Subject: Re: [TN] Fiber Optic Cables
You mean jacket? Yes
Out door or indoor? Indoor internal to a system
Multimode or single mode? Single Mode
What is usage? System communication signals
Moisture sensitivity? No
I am not sure on the last two but the scenario is this, while reworking
a component on a particular board the operator distorted the jacket over
a fiber optic cable, the cable still functions properly, meets form fit
and function but I was not sure if there was a spec that covered this
distortion and allowable amounts.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Joyce Koo
Sent: Wednesday, October 20, 2010 10:36 AM
To: [log in to unmask]
Subject: Re: [TN] Fiber Optic Cables
You mean jacket? Out door or indoor? Multimode or single mode? What is
usage? Moisture sensitivity? Materials of your cable? What wavelength?
--------------------------
Sent using BlackBerry
----- Original Message -----
From: Gyorke, Chad (SA-1) [mailto:[log in to unmask]]
Sent: Wednesday, October 20, 2010 09:39 AM
To: [log in to unmask] <[log in to unmask]>
Subject: [TN] Fiber Optic Cables
Hello TechNet,
Does anybody know what standard(s) can be used to evaluate fiber
optic cables? We are covered as far as performance and length but our
concern is over insulation thickness, I do not believe normal
WHMA/IPC-620 rules would apply.
Chad
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or
[log in to unmask]
______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------
---------------------------------------------------------------------
This transmission (including any attachments) may contain confidential
information, privileged material (including material protected by the
solicitor-client or other applicable privileges), or constitute
non-public information. Any use of this information by anyone other than
the intended recipient is prohibited. If you have received this
transmission in error, please immediately reply to the sender and delete
this information from your system. Use, dissemination, distribution, or
reproduction of this transmission by unintended recipients is not
authorized and may be unlawful.
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or
[log in to unmask]
______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
|
