1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAPRIL 20, 20151UL 2237Outline of Investigation for Multi-Point Interconnection Power CableAssemblies For Industrial MachineryIssue Number: 4April 20, 2015Summary of TopicsThis Fourth Issue of the
2、 Outline of Investigation for Multi-PointInterconnection Power Cable Assemblies for Industrial Machinery, UL2237, has been published and now covers power cable assemblies thatare rated 1000 V or less, when intended to be used on industrialmachinery in accordance with the National Fire Protection Ass
3、ociationElectrical Standard for Industrial Machinery, NFPA 79 that have systemvoltages up to and including 1000 V. Other editorial revisions have beenmade throughout to reflect present practice.ULs Outlines of Investigation are copyrighted by UL. Neither a printed norelectronic copy of an Outline of
4、 Investigation should be altered in any way. All ofULs Outlines of Investigation and all copyrights, ownerships, and rights regardingthose Outlines of Investigation shall remain the sole and exclusive property of UL.COPYRIGHT 2015 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED
5、FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAPRIL 20, 2015UL 22372No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .52 Glossary .63 Components 74 Units of Measurement .85 Ref
6、erences .8CONSTRUCTION6 Accessibility of Uninsulated Live Parts 87 Insulating Materials 107.1 Insulating materials for devices rated 600 V or less 107.2 Insulating materials for devices rated 601 1000 V .148 Live Parts 159 Grounding and Dead-Metal Parts 1510 Terminals 1611 Strain Relief and Cord Ent
7、ries 1712 Spacings 1712.1 Spacing for devices rated 600 V or less .1712.2 Spacings for devices rated 601 1000 V .1812.3 Alternate spacings clearance and creepage distances 1813 Assembly 1913.1 General .1913.2 Polarization 2013.3 Mating and interchangeability 2013.4 Terminal identification .2014 Encl
8、osure 2215 Flexible Cord, Cable or Wiring 2216 Mounting 2217 Environmental Rating .2217.1 Jacket adhesion 2218 Outdoor Use .23PERFORMANCE19 General .2320 Mold Stress-Relief Distortion Test .2421 Moisture Absorption Test 2522 Dielectric Voltage-Withstand Test 2623 Insulation Resistance Test .2724 Con
9、ductor Secureness Test 2725 Strain-Relief Test .2825.1 Cord-to-fitting test 2825.2 Feeder-tap cable systems test .2926 Overload Test .3027 Temperature Test 3128 Resistance to Arcing Test 3229 Current-Cycling and Vibration Test .3229.1 General .32APRIL 20, 2015 UL 2237 3UL COPYRIGHTED MATERIAL NOT AU
10、THORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL29.2 Current-cycling before vibration test 3329.3 Vibration test 3329.4 Current-cycling after vibration test 3329.5 Calculations .3430 Jacket Retention Test 3431 Polarization Test .3432 Adhesion Test .3533 Environmental Enclo
11、sure Tests .3534 Grounding (Bonding) Path Current Test .3535 Cable Pullout Test (For Pin Type or Insulation Displacement Type Terminals) .3536 Creep Test (For Pin Type or Insulation Displacement Type Terminals) 3637 Short-Circuit Withstand Test .3637.1 General .3637.2 Protective devices 3837.3 Calib
12、ration of test circuits 4237.4 Alternating-current circuits .4237.5 Available current of 10,000 A or less .4337.6 Available current more than 10,000 A .4437.7 Instrumentations for test currents above 10,000 A 4637.8 Direct current circuits .4737.9 Calibration characteristics for protective device 49
13、38 Humidity Conditioning Test .5139 Crush Test .5140 No-Load Endurance Test 5241 Impact Test (Male and Female Fittings) .5242 Abnormal Overload Test .5443 Resistance to Corrosion Test .5544 Accelerating Aging Tests 5644.1 General .5644.2 Rubber, EPDM, and TEE compounds .5644.3 PVC compounds and copo
14、lymers 5645 Insulating Materials .5745.1 Glow wire test .5745.2 Comparative tracking index test 5745.3 High-current arc resistance to ignition test .57MANUFACTURING AND PRODUCTION TESTS46 Dielectric Voltage-Withstand Test .58RATINGS47 General 60MARKINGS48 Details 6049 Environmental Enclosures .62App
15、endix AStandards for ComponentsA1APRIL 20, 2015UL 22374UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 This outline of investigation covers multi-point interconnection power cable assemblies. They mayconsist of power cab
16、le assemblies, male and female power cable fittings, panel-mounted powercable/conductor fittings and feeder-tap power cable fittings used with industrial machinery in accordancewith the National Fire Protection Association Electrical Standard for Industrial Machinery, NFPA 79 thathave system voltage
17、s up to and including 1000 V.1.2 These interconnection power cable assemblies may be used in an industrial environment to distributethe power to branch circuits, including motor branch circuits, of industrial machinery.1.3 Devices covered under this outline of investigation are only intended for ind
18、oor use, unless otherwiseidentified.1.4 The power cable assemblies covered under this outline of investigation are rated 1000 V or less, andare intended to be used on industrial machinery in accordance with the National Fire ProtectionAssociation Electrical Standard for Industrial Machinery, NFPA 79
19、 that have system voltages up to andincluding 600 V. Each power cable assemblies and fittings are rated in volts and amperes. The electricalratings are marked, on each device or on a flag label affixed to each individual power cable assembly.1.5 The cable assembly fittings and panel-mount fittings a
20、re intended to be installed in accordance withthe manufacturers installation instructions. The cable assembly fittings are intended to be assembled ormolded on flexible cord. The power cable assemblies and mating fittings are not intended to be used asa substitute for the fixed wiring of the buildin
21、g structure. The power cable assemblies and mating fittingsmay be connected to the fixed wiring of the building structure; using a feeder tap fitting or male/femalecable fitting.1.6 Power cable assemblies and fittings covered under this outline of investigation are not intended tomake or interrupt c
22、urrent under load conditions. These power cable assemblies and fittings have beeninvestigated to their marked short-circuit current rating. Power cable assemblies and fittings may specifya maximum ampere rating, type of overcurrent protective device, or both. Unless otherwise marked, thepower cable
23、assemblies and fittings are intended to be supplied from an overcurrent protective device ofthe maximum ampere rating permitted by the Relationship Between Conductor Size and Maximum Ratingor Setting of Short-Circuit Protective Device for Power Circuits Table, Table 7.2.10.4, of the National FirePro
24、tection Association Electrical Standard for Industrial Machinery, NFPA 79.1.7 This outline of investigation does not cover male-to-male cable assemblies or multi-outlet fittings.1.8 These devices are intended for use only with the manufacturers same line of products covered underthis outline of inve
25、stigation.1.9 These devices are not intended for disconnect use only not for current interrupting. Devices may beinvestigated for disconnecting means, if so requested and comply with the overload, temperature,resistance to arcing and dielectric voltage withstand testing as described in Table 19.1.AP
26、RIL 20, 2015 UL 2237 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2 Glossary2.1 For the purpose of this outline of investigation the following definitions apply.2.2 FEEDER-TAP POWER CABLE FITTINGS Feeder-tap fittings are intended for feed-
27、throughtermination to tray cable or other appropriate cable together with either a female interconnection device toterminate to a cable assembly or to connect to flexible cord or cable suitable for hard use that is the samesize and ampacity as the feeder cable.2.3 FEED-THROUGH FITTING A male and fem
28、ale device directly connected through the pins orcontacts. This device is not assembled on a flexible cord, cable or AWM.2.4 GROUNDED CONDUCTOR The circuit conductor that is identified and intended for connection tothe grounded circuit.2.5 GROUNDING-CONDUCTOR The circuit conductor that is identified
29、 and intended for connection tothe grounding circuit.2.6 GROUNDING-CONDUCTOR PATH A path between the grounding pin or contact and/or terminal tothe grounding conductor.2.7 MALE AND FEMALE POWER CABLE FITTINGS Fittings intended to be field-wired onto flexiblecord or cable with either a male or female
30、 insert. The diameter and the wire size of the flexible cord orcable to which the fitting is intended to be assembled is marked on the individual fitting or on the smallestunit-shipping container.2.8 PANEL-MOUNTED POWER CABLE/CONDUCTOR FITTINGS These fittings consist of apanel-mounted assembly with
31、either a male or female insert. Each assembly is provided with a means tosecure to an enclosure, a panel, of the industrial machinery.2.9 POLARIZED DEVICE A device constructed for connection to a mating fitting only in the position thatconnects related poles of an electrical circuit.2.10 POWER CABLE
32、 ASSEMBLIES Cable assemblies consist of a length of cable or flexible cord witha molded-on or assembled-on male or female power cable fitting on at least one end of the cable.2.11 SPLITTER A male fitting that terminates in two or more female fitting which may or may not becord connected.2.12 SYSTEM
33、VOLTAGE The rated supply or line voltage to which the end product will be connected.2.13 TERMINAL, CRIMP TYPE A terminal in which an electro-mechanical connection is made betweenthe terminal lug and a conductor by compressing the lug onto the conductors.2.14 TERMINAL, INSULATION-DISPLACEMENT A termi
34、nal having a contacting member that forcesthe conductor insulation aside and presses to contact the current-carrying conductor.APRIL 20, 2015UL 22376UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2.15 TERMINAL, PIN TYPE (INSULATION-PIERCING)
35、A terminal having a contact pin that puncturesthe conductor insulation to contact the current-carrying conductor.2.16 TERMINAL, PRESSURE WIRE A terminal that establishes a connection between one or moreconductors and a terminal plate by means of mechanical pressure without the use of solder. The ter
36、minalis one of the following types:a) Clamp-type A terminal in which the conductor is held under a pressure plate or saddleclamp by one or more screws. This type of terminal may be provided in combination with awire-binding screw terminal.b) Setscrew-type A terminal in which the pressure is applied
37、by the end of the screw bearingon the conductor, either directly or through a wire-protecting pad.2.17 TERMINAL, WIRE-BINDING SCREW A terminal in which the conductor is bent around the screwand is clamped directly under the head of the screw when it is tightened.2.18 UNIT CONTAINER The smallest cart
38、on, package, or container, in which a fitting is packaged. Aunit container may contain more than one fitting if the devices are not intended to be removed from thecontainer for individual sale.3 Components3.1 Except as indicated in 3.2, a component of a product covered by this outline of investigati
39、on shallcomply with the requirements for that component. See Appendix A for a list of standards coveringcomponents used in the products covered by this outline of investigation.3.2 A component is not required to comply with a specific requirement that:a) Involves a feature or characteristic not requ
40、ired in the application of the component in theproduct covered by this outline of investigation, orb) Is superseded by a requirement in this outline of investigation.3.3 A component shall be used in accordance with its rating established for the intended conditions ofuse.3.4 Specific components are
41、incomplete in construction features or restricted in performance capabilities.Such components are intended for use only under limited conditions, such as certain temperatures notexceeding specified limits, and shall be used only under those specific conditions.APRIL 20, 2015 UL 2237 7UL COPYRIGHTED
42、MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL4 Units of Measurement4.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.5 References5.1 Any undated reference to a code or standard appea
43、ring in the requirements of this outline ofinvestigation shall be interpreted as referring to the latest edition of that code or standard.CONSTRUCTION6 Accessibility of Uninsulated Live Parts6.1 Uninsulated live parts, other than exposed wiring terminals, and internal wiring shall not be accessiblet
44、o contact by the probe illustrated in Figure 6.1. The probe is to be applied with a force of 3 lbf (13.3 N).The probe is to be rotated, changed in configuration, or angled; before, during, and after application.This is generated text for figtxt.APRIL 20, 2015UL 22378UL COPYRIGHTED MATERIAL NOT AUTHO
45、RIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFigure 6.1Accessibility probeAPRIL 20, 2015 UL 2237 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6.2 The probe is to be used as a measuring instrument to investigate t
46、he accessibility and not as aninstrument to determine the strength of a material.7 Insulating Materials7.1 Insulating materials for devices rated 600 V or less7.1.1 General7.1.1.1 A part that functions as electrical insulation or as an enclosure of a device shall be made ofinsulating material rated
47、for the particular application.7.1.1.2 Vulcanized fiber shall not be used as the sole support of live parts. Vulcanized fiber is acceptablefor insulating washers, separators, and barriers. Vulcanized fiber shall comply with Moisture AbsorptionTest, Section 21.7.1.1.3 Tubing used to enclose live part
48、s shall have a flammability rating of VW-1 in accordance with theStandard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, UL 94. Thetubing shall be rated for voltage and temperature for the conditions of use.7.1.2 Flammability7.1.2.1 A polymeric material used for
49、 electrical insulation or enclosure of live parts shall have aflammability classification of HB, V-2, V-1, V-0, VTM-2, VTM-1, VTM-0, 5VA, or 5VB in accordance withthe Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, UL 94.The flame class rating of the material shall be determined at the minimum thickness employed at the wallsand barriers in the device, which are critical to the functioning of the insulation or enclosure of the device.Exception No. 1: This requirement does not apply to a sma
