1楼 carrie021
等级:小学生
发帖数:8
回帖数:8
|  发帖时间 - 2009/6/23 13:21:07
| “您好，这里是XX光缆公司，请问有什么可以帮您的？”……自打今天早上进办公室以后，电话就没停过，我是一手接电话，一手敲键盘，虽说现在金融危机正袭击全球，但好像对我们公司不太有影响，每天还是接不完的电话、订单，老板还不时地丢些新任务下来，照这样发展下去，估计“女超人”很快就要诞生了。没想到，说曹操曹操就到----“蔷薇啊，上次我们接洽的MR. Williams终于下单了，这可是个大客户啊，这笔生意做成了，对我们公司来说是质的飞跃啊。不过，对方要求我们的货要通过UL认证，你尽快整理份关于UL线材认证的材料给我”。
……UL认证是什么？这个词对于我这个才入行的新人来说是彻底陌生的（见识太少，大家不要笑我啊）。空想没用，还是去百度一下吧。别说，网上的资源还真多，不经意间看到有一个UL之窗的论坛，名字里有UL，应该能找到我想找的东西吧。进去找了下，还真被我找到了，原来UL认证是美国的一项产品质量检测标准，要想出口产品到美国，一般都要通过此项认证。我们公司是生产光缆的，我就***搜了一下UL线材认证方面的资料，发现根据线材规格的不同，相对应的UL标准也是不尽相同的。现针对我公司主要生产地光缆方面向大家简单介绍一下相对应的UL标准。
UL光纤线缆标准是依照美国***电工法规 NEC (National Electrical Code)，将线缆分为主要两类：一为不带导电金属组件或材质，一为含导电组件；此外，依照光纤的布线环境及燃烧等级，可分为如下两种型号：Plenum Flame Test和Riser Flame Test。
目前 UL 是采用 UL 1651 标准进行光纤线缆的安规结构及测试标准，不过其并未规范光纤及光纤披覆层的材质，而是以燃烧测试，即电缆线是否有延烧的可能性，来验证光纤电缆铺设于通讯环境中是否符合安全条件。此外，UL 1651 并不包含光纤性能测试，以及带电流的导体的相关测试。
主要检测范围如下：
A．These requirements cover single and multiple optical-fiber cables for control, signaling, and communications as described in Article 770 and other applicable parts of the National Electrical Code (NEC).
Cables complying with these requirements are:
Type OFNP - Plenum - A nonconductive cable for use in ducts, plenums, and other spaces used for environmental air. A nonconductive cable contains no metallic members and no other electrically conductive materials.
Type OFCP - Plenum - A conductive cable for use in ducts, plenums, and other spaces used for environmental air. A conductive cable contains non-current-carrying conductive members such as metal strength members and metallic vapor barriers.
Type OFNR - Riser - A nonconductive cable for vertical use in shafts or from floor to floor.
Type OFCR - Riser - A conductive cable for vertical use in shafts or from floor to floor.
Type OFN and OFNG - General Purpose - Nonconductive cables for general purpose use.
Type OFC and OFCG - General Purpose - Conductive cables for general purpose use.
B．Smoke and fire considerations are as follows for the cables covered in these requirements:
a) TYPE OFNP and OFCP CABLES ?Cables that are intended for installation in accordance with section 770-53(a) of the National Electrical Code (ANSI/NFPA 70-1993) in a duct, plenum, or other space used to transport environmental air without the cable being enclosed in a raceway in that space are tested for smoke and flame characteristics in accordance with the Test for Flame-Propagation and Smoke-Density values for Electrical and Optical-Fiber Cables Used in Spaces Transporting Environmental Air (UL 910). A cable that complies exhibits a maximum flame-propagation distance that is not greater than 5 ft, 0 in or 152 cm, a peak optical density of smoke produced of 0.50 or less (32 percent light transmission), and an average optical density of smoke produced of 0.15 or less.
b) TYPE OFNR and OFCR CABLES ?Cables that are intended for use in vertical runs in a shaft, or penetrating more than one floor, in accordance with section 770-53(b) of the National Electrical Code (ANSI/NFPA 70-1993) are tested for flame-propagation characteristics in accordance with the Test for Flame Propagation Height of Electrical and Optical-Fiber Cables Installed Vertically in Shafts (UL 1666). A cable that complies has a flame-propagation height less than 12 ft, 0 in or 366 cm and has a temperature of 850.0EF (454.4EC) or less at a height of 12 ft, 0 in or 366 cm.
c) TYPE OFN, OFNG, OFC, or OFCG CABLES ?Type OFN or OFC cables that are intended for installation in accordance with section 770-53(c) or (d) of the National Electrical Code (ANSI/NFPA 701993) comply with a 70,000 Btu/h (20.5 kW) vertical-tray flame test that, at the cable manufacturer's option, is either of the following.
1) The UL test described in 9.3 and 9.4 of these requirements. This UL test is essentially the same as the test described in ANSI/IEEE 383-l974 (R1982).
2) The CSA FT4 test as described in 9.5 of these requirements. This test differs from the IEEE and UL tests in loading (more cables are used, with small cables bundled, and the spacing between cables or bundles is limited), burner angle, and failure criterion.
Type OFCG and OFNG cables must comply with the CSA FT4 test.
C．Cables covered in these requirements are not required by the NEC to be used in raceway. These cables are capable of use without the physical protection of raceway but may be pulled into conduit or installed in other raceway.
D．These requirements do not cover cables that contain current -carrying conductors. Requirements for cables that contain electrical and optical fiber members are found in the applicable standard for the electrical cable.
E．These requirements do not cover the optical performance of the cable.
F．A product that contains features, characteristics, components, materials, or systems new or different from those in use when the Standard was developed, and that involves a risk of fire or injury to persons, shall be evaluated using the appropriate additional component and end-product requirements as determined necessary to maintain the level of safety for the user of the product as originally anticipated by the intent of this Standard.
由于本人属于菜鸟一级，在此就不对以上英语内容做字面翻译了，以免误导大家，哪位高手如帮忙翻译整理本人将不胜感激。介绍有所不足之处烦请大家见谅，如果你们想找相关的材料，还是去专业的UL安规论坛上找吧，那里发布的信息***、可信度高。不过，毕竟这是我牺牲大好休息时间整理出来的，大家可要帮忙顶顶啊，没有功劳也有苦劳嘛，不胜感激、不胜感激。
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