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1、FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Subject 2238 January 25, 2008 SUMMARY OF TOPICS The following is being proposed for preliminary review and comment only: 1. For Preliminary Review Only: The First Edition of the Standard for Cable Assemblies and Fittings for Industrial Co
2、ntrol and Signal Distribution, UL 2238. This standard covers devices intended for inter-connection of equipment, sensors, and actuators in remote- control, signaling, and power-limited circuits. Included are cable assemblies and fi ttings, feeder-tap cable systems, feed-through connectors, multi-out
3、let fi ttings, panel-mount fi ttings, and splitters. COMMENTS DUE: MARCH 25, 2008 This proposal is for review and comment only (no ballot at this time). Please note that comments on a preliminary review document will not receive a response from the proposal author through CSDS. Instead, the proposal
4、 author will be asked to review the comments and adjust the proposals and/or supporting rationale as the author determines to be appropriate. The preliminary review process is an informal mechanism that provides authors with the opportunity to refi ne their proposals before they advance to the next
5、stage in ULs standards development process. In some cases, the author of the proposals may choose to discontinue them. In this case, the author need not do anything after preliminary review has ended. Normally, the next step in the process is the more formal STP ballot and stakeholder review process
6、. Only comments posted during the STP ballot and stakeholder review process will be provided with a response in CSDS. 1. For Preliminary Review Only: The First Edition of the Standard for Cable Assemblies and Fittings for Industrial Control and Signal Distribution, UL 2238. This standard covers devi
7、ces intended for inter-connection of equipment, sensors, and actuators in remote-control, signaling, and power-limited circuits. Included are cable assemblies and fi ttings, feeder-tap cable systems, feed-through connectors, multi-outlet fi ttings, panel-mount fi ttings, and splitters. RATIONALE Pro
8、posal submitted by: Jonel Barbu, Underwriters Laboratories There is a need for a new UL standard to cover devices that are presently covered under multiple UL standards. Therefore, UL is proposing the fi rst edition of the Standard for Cable Assemblies and Fittings for Industrial Control and Signal
9、Distribution, UL 2238. This standard covers devices intended for inter-connection of equipment, sensors, and actuators in remote-control, signaling, and power-limited circuits. Included are cable assemblies and fi ttings, feeder-tap cable systems, feed-through connectors, multi-outlet fi ttings, pan
10、el-mount fi ttings, and splitters. These devices are intended to be used with industrial control equipment in accordance with Article 725 of the National Electrical Code, ANSI/NFPA 70. Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=University of Texas Revised
11、Sub Account/5620001114 Not for Resale, 02/17/2008 23:45:17 MSTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Many comments were received from industry regarding the material requirements when the fi rst edition of
12、the Standard for Cable Assemblies and Fittings for Industrial Control and Signal Distribution, UL 2238, was proposed back in April of 2005. As a result of these comments, the material requirements have been revised and some additional construction and performance tests have been added to the propose
13、d fi rst edition of UL 2238. In addition to the comments that were made on the proposed fi rst edition of UL 2238, requests were made to cover Industrial Machinery, NFPA 79 applications due to changes in the NEC. In response to this request, UL developed the Outline of Investigation for Multi-Point
14、Interconnection Power Cable Assemblies for Industrial Machinery, Su 2237. Su 2237 requirements cover multi-point interconnection power cable assemblies. They may consist of power cable assemblies, male and female power cable fi ttings, panel-mounted power cable/conductor fi ttings and feeder-tap pow
15、er cable fi ttings used with industrial machinery in accordance with the National Fire Protection Association Electrical Standard for Industrial Machinery, NFPA 79. This proposed fi rst edition of UL 2238 refl ects current practice and is in line with Su 2237. A summary of the major changes to the p
16、reviously proposed are as follows: A defi nition for a valve fi tting was added. Construction requirements for valve fi ttings were added, Section 6.3. The moisture absorption resistance test was revised in Section 20. The cycles that the temperature of the connection is to be recorded at for the cu
17、rrent-cycling before vibration test were revised in 26.2.4. Table 37.2 Short time current test, was revised. The following test sections were added: Section 37.9 Assembly test Section 37.10 Accelerating aging test Section 37.11 PVC compounds and copolymers Section 37.12 Crushing test for valve conne
18、cters only Section 37.13 Impact test for valve connecters only Section 37.14 Low temperature test for valve connecters only PROPOSAL JANUARY 25, 2008SUBJECT 2238-2- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=University of Texas Revised Sub Account/56200011
19、14 Not for Resale, 02/17/2008 23:45:17 MSTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION INTRODUCTION 1 Scope 1.1 These requirements cover devices intended for inter-connection of equipment, sensors, and actuators
20、in remote-control, signaling, and power-limited circuits. Included are cable assemblies and fi ttings, feeder-tap cable systems, feed-through connectors, multi-outlet fi ttings, panel-mount fi ttings, and splitters. These devices are not intended for disconnect means. These devices are rated not mor
21、e than 60 A and not more than 600 V. 1.2 Unless otherwise noted, all devices are intended for indoor use. 1.3 These devices are for use on alternating current, direct current, or both. 1.4 The cable assembly fi ttings and panel-mount fi ttings are intended to be installed in accordance with the manu
22、facturers installation instructions. The cable assembly fi ttings are intended to be assembled or molded on fl exible cord. 1.5 Each type of device covered by this standard is described in generic terms where practicable. Reference to use locations identifi ed in the National Electrical Code or spec
23、ifi c applications are omitted unless they are required for the identifi cation of the device type. Such additional information is included in the applicable standards for the end-use product involved or in markings for the device. 1.6 This standard does not cover male-to-male cable assemblies. 1.7
24、This standard does not directly apply to the following but may supplement other applicable standards: a) Devices produced integrally with fl exible cord or cable that are covered by the Standard for Cord Sets and Power-Supply Cords, UL 817; b) Devices intended for connection to the branch circuit, s
25、uch as attachment plugs, cord connectors, receptacles, inlets, and outlets, that are covered by the Standard for Attachment Plugs and Receptacles, UL 498; c) Devices solely intended for direct connection to the branch circuit in accordance with the National Electrical Code, NFPA 70, and that are pro
26、vided with contacts of the pin and sleeve type, covered by the Standard for Plugs, Receptacles, and Cable Connectors, of the Pin and Sleeve Type, UL 1682; d) Devices intended to interconnect industrial machinery and to be installed in accordance with the Electrical Standard for Industrial Machinery,
27、 NFPA 79 that are covered by the Outline of Investigation for Multi-point Interconnection Power Cable Assemblies For Industrial Machinery, Su 2237; e) Connecters intended for use in Data, Signal, Control and Power Applications within and between electrical equipment and intended for factory assembly
28、 as covered by the Standard for Component Connectors for Use in Data, Signal, Control and Power Applications, UL 1977; and the Standard for Telephone Equipment, UL 1459, or the Standard for Communications Circuit Accessories, UL 1863; 2 Glossary 2.1 For the purpose of this standard the following def
29、i nitions apply. JANUARY 25, 2008SUBJECT 2238-3- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=University of Texas Revised Sub Account/5620001114 Not for Resale, 02/17/2008 23:45:17 MSTNo reproduction or networking permitted without license from IHS -,-,- FOR
30、 INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION 2.2 CABLE ASSEMBLY A length of fl exible cord or cable with an male cable fi tting as a line fi tting and a female cable fi tting as a load fi tting. 2.3CURRENT-CARRYING CONDUCTOR A cord conductor excluding both the grounding conductor and t
31、he neutral conductor. 2.4ENCLOSURE That part of the device that renders inaccessible all or any parts of the device that otherwise present a risk of electric shock, propagate of fl ame initiated by electrical disturbances occurring within, or both. 2.5 FEEDER-TAP CABLE SYSTEM A connector provided wi
32、th fi eld-wiring terminals for feed-through connection to power-limited tray cable or other appropriate cable and either a female connector to connect to a cable assembly or fi eld-wiring terminals to connect to fl exible cord. 2.6FEED-THROUGH CONNECTOR A male and female device directly connected th
33、rough the pins or contacts. This device is not assembled on a cable or conductor. 2.7FEMALE CABLE FITTING A female contact device intended to be molded or assembled to fl exible cord to make an electrical connection to a male cable fi tting or an inlet. 2.8GROUNDED CONDUCTOR The circuit conductor th
34、at is intentionally grounded. 2.9GROUNDING-CONDUCTOR PATH A path between the grounding pin or contact and the grounding terminal. 2.10INLET A male contact device intended to be mounted on equipment where the conductors are internal to the equipment to provide an integral means for the connection of
35、a female cable fi tting. 2.11INSULATION, BASIC Insulation applied to live parts to provide basic protection against a risk of electric shock. This insulation does not necessarily include insulation used exclusively for functional purposes. 2.12 INSULATION, FUNCTIONAL The insulation necessary for the
36、 proper functioning of the fi tting and for basic protection against a risk of electric shock. This includes all parts relied upon to support live parts in place, all internal barriers necessary to maintain spacing, and the outlet face portion of all female fi ttings. 2.13MALE CABLE FITTING A male c
37、ontact device intended to be molded or assembled to a fl exible cord or cable to make an electrical connection to a female panel-mount fi tting, a female cable fi tting, or outlet. 2.14OUTLET A female contact device intended to be mounted on equipment where the conductors are internal to the equipme
38、nt to provide an integral means for the connection of a male cable fi tting. 2.15 POLARIZED DEVICE A device constructed for connection to a mating fi tting only in the position that connects related poles of an electrical circuit. 2.16SMALL PARTS A small part is considered to be not more than 0.122
39、in3(2 cm3) in volume. 2.17 SPLITTER A male fi tting that terminates in two or more outlets or that terminates in two or more female cable fi ttings. JANUARY 25, 2008SUBJECT 2238-4- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=University of Texas Revised Sub
40、Account/5620001114 Not for Resale, 02/17/2008 23:45:17 MSTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION 2.18TERMINAL, INSULATION-DISPLACEMENT A terminal having a contacting member that forces the conductor insulat
41、ion aside and presses to contact the current-carrying conductor. 2.19TERMINAL, PIN TYPE (INSULATION-PIERCING) A terminal having a contact pin that punctures the conductor insulation to contact the current-carrying conductor. 2.20TERMINAL, PRESSURE WIRE A terminal that establishes a connection betwee
42、n one or more conductors and a terminal plate by means of mechanical pressure without the use of solder. The terminal is one of the following types: a) Clamp-type A terminal in which the conductor is held under a pressure plate or saddle clamp by one or more screws. This type of terminal may be prov
43、ided in combination with a wire-binding screw terminal. b) Setscrew-type A terminal in which the pressure is applied by the end of the screw bearing on the conductor, either directly or through a wire-protecting pad. 2.21TERMINAL, WIRE-BINDING SCREW A terminal in which the conductor is bent around t
44、he screw and is clamped directly under the head of the screw when it is tightened. 2.22TERMINAL, CRIMP TYPE A terminal in which an electro-mechanical connection is made between the terminal lug and a conductor by compressing the lug onto the conductors. 2.23 UNIT CONTAINER The smallest carton, packa
45、ge, or container, in which a fi tting is packaged. A unit container may contain more than one fi tting if the devices are not intended to be removed from the container for individual sale. 2.24 VALVE FITTING A male or female fi tting contact device intended to be molded or assembled to a fl exible c
46、ord or cable or assembled to conduit and is intended to connected or assembled to a valve. 3 References 3.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 4 Components 4.1 Ex
47、cept as indicated in 4.2, a component of a product covered by this standard shall comply with the requirements for that component. See Appendix A for a list of standards covering components used in the products covered by this standard. 4.2 A component is not required to comply with a specifi c requ
48、irement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. JANUARY 25, 2008SUBJECT 2238-5- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=University of Texas Revised Sub Account/5620001114 Not for Resale, 02/17/2008 23:45:17 MSTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION 4.3 A component shall be used in accordance with