1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES INC. CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared and published by Underwriters Laboratories Inc.(UL). It is normative for the a
2、pplicable UL Product Certification Program(s); however, it is currently notpart of the UL Standard(s) referenced below.Product Category (CCN): AAIZStandard Number: UL 2225Standard Title: Standard for Cables and Cable-Fittings For Use In Hazardous(Classified) LocationsEdition Date: September 30, 2013
3、Edition Number: 4Section / Paragraph Reference: Section 37Subject: Div. 2 MarkingDECISION:MARKINGS37 Details37.1 Cable sealing fitting shall be marked with the following:a) The manufacturers or private labelers name, trademark, or other descriptive marking bywhich the organization responsible for th
4、e product may be identified.b) A descriptive catalog or designation number to specifically identify the product.c) Thread size.d) Designation of the hazardous location in which the product is intended to be used. For thespecific marking for Class I, II, and III, Division 1 and 2, see 37.2; for AEx m
5、arking for explosivegas atmospheres, see 37.3 or for AEx marking for explosive dust atmospheres, see 37.4. TheAEx marking for explosive gas atmospheres and explosive dust atmospheres shall be separateand not combined.37.2 Marking for Class I, II, and III, Division 1 and 2 shall be marked with the fo
6、llowing:a) Class, Group and Division, as appropriate. For Division 1 or Division 2, designation of thehazardous location Group need not be marked on a fitting if the size or design of the fitting issuch that there is insufficient space for this marking, and:1) The designations of both the hazardous
7、location class and group appear on thesmallest package in which the fitting is shipped; and2) The fitting is suitable for all hazardous location groups in the Division 1 or Division 2hazardous location class marked on the fitting.37.3 AEx marking for explosive gas atmospheres shall be marked with th
8、e following:a) Class I;b) The applicable Zone marking - i.e. Zone 0, Zone 1, or Zone 2;UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULc) The symbol AEx;d) The symbol for each type of protection used:1) d: flameproof;2) e: increased safety;e)
9、The symbol of the group:1) IIA, IIB or IIC for electrical equipment for places with an explosive gas atmosphereother than mines susceptible to firedamp.2) When the electrical equipment is for use only in a particular gas, the chemicalformula or the name of the gas in parentheses.3) When the electric
10、al equipment is for use in a particular gas in addition to beingsuitable for use in a specific group of electrical equipment, the chemical formula shallfollow the group and be separated with the symbol +, for example, IIB+H2.The markings a) to e) shall be placed in the order in which they are given
11、and shall each be separatedby a small space.To avoid the risk of explosion due to confusion with explosionproof cord and cable fittings marked “ClassI, Division 2” per 37.3, cord or cable fittings complying only with the requirements for flameproof “d” orincreased safety “e” cable fittings shall not
12、 be additionally marked “Class I, Division 2”.Note: In accordance with NEC Article 501, cable sealing fittings marked “d” or “e” are permitted to be usedfor the connection of general purpose assemblies acceptable for Class I, Division 2 locations.37.4 AEx marking for explosive dust atmospheres are m
13、arked with the following:a) The applicable Zone marking - i.e. Zone 20, Zone 21, or Zone 22;b) The symbol AEx;c) The symbol for each type of protection used:1) ta, tb, tc,ortD: dust ignition protection by enclosure.To avoid the risk of explosion due to confusion with explosionproof cord and cable fi
14、ttings marked “ClassI, Division 2” per 37.3, cord or cable fittings complying only with the requirements for protection byenclosure “ta”,“tb”, “tc” or “tD” cable fittings shall not be additionally marked Class I, Division 2 or Class II,Division 2.Note: Where acceptable per NEC Section 502.6, cable f
15、ittings for Zone 21 or Zone 22 locations arepermitted to be installed in Class II, Division 2 locations.37.5 In addition to, or as an alternative to, the marking in 37.2(a), cable sealing fittings that have beeninvestigated and found to comply with the requirements for Class I, Group D locations may
16、 additionally oralternatively be marked Class I, Zone 1, Group IIA.STANDARD NUMBER: UL 2225 -2-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL37.6 In addition to, or as an alternative to, the marking in 37.2(a), cable sealing fittings that ha
17、ve beeninvestigated and found to comply with the requirements for Class I, Group C locations may additionally oralternatively be marked Class I, Zone 1, Group IIB.37.7 In addition to, or as an alternative to, the marking in 37.2(a), cable sealing fittings that have beeninvestigated and found to comp
18、ly with the requirements for Class I, Group B locations may additionally oralternatively be marked Class I, Zone 1, Group IIB plus Hydrogen.37.8 In addition to, or as an alternative to, the marking in 37.2(a), cable sealing fittings that have beeninvestigated and found to comply with the requirement
19、s for Class I, Group A locations may additionally oralternatively be marked Class I, Zone 1, Group IIC.37.9 In addition to, or as an alternative to, the marking in 37.2(a), cable fittings that have been investigatedand found to comply with the requirements for Class II, Division I locations is not p
20、rohibited from beingadditionally or alternatively marked Zone 20, Zone 21 or Zone 22 (as applicable).37.10 For Division 1 or Division 2, designation of the hazardous location Group need not be marked ona fitting if the size or design of the fitting is such that there is insufficient space for this m
21、arking, and:a) The designations of both the hazardous location class and group appear on the smallestpackage in which the fitting is shipped; andb) The fitting is suitable for all hazardous location groups in the Division 1 or Division 2hazardous location class marked on the fitting.37.11 Except as
22、noted, all markings shall be on a metal plate or plates permanently attached to the cablesealing fitting, or shall be embossed, stamped, cast, or molded in the fitting where it will be readily visibleafter installation.37.12 Cable and cord sealing fittings shall be provided with the necessary instal
23、lation instructions detailingproper cable or cord size selection and type of sealing compound to be used.37.13 This information may be marked on the box or fitting or it may be part of the installation instructionspacked with each box or fitting.37.15 Each fitting or each package of sealing compound
24、 shall be provided with instructions containing thefollowing information:a) Preparation of dams, if required.b) The installation instructions shall specify the maximum diameter over conductors of the cablethat the entry is intended to accept and the maximum numbers of conductors that can passthrough
25、 the compound.c) Filling or assembly instructions.d) A statement including the following:1) Specific temperature below which the seal should not be formed.2) Period of time the fitting must be at, or above, the given temperature in order that theseal will set properly.STANDARD NUMBER: UL 2225 -3-UL
26、COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL37.16 Cord fitting instructions shall additionally indicate the following:a) The cord connector is for use only with extra-hard usage cord such as Type S, SO, ST, STOwith a grounding conductor;b) Th
27、e cord must be of continuous length without splices; andc) Cord sealing fittings must be replaced at the time of cord replacement.RATIONALE FOR DECISION:The proposed revision is intended to limit the risk of explosion in a Classified location due to confusionover NEC permitted cable fittings being m
28、arked as though they are listed for the location where requiredto be by the NEC.The Scope of UL 2225 Ed. 1 covered only explosionproof cable fittings for Class I Division 2 for thepurpose of terminating cables with fittings required to be listed for the location by Section 501.10(B) of theNEC. These
29、 fittings are explosionproof. UL has been certifying explosionproof cable fittings for Class I,Division 2 in UL category CYMX for more than 30 years. In accordance with UL 2225 section 37.10 b) thefittings listed for the location are marked “Class I, Division 2.”Where general purpose enclosures are
30、permitted by the NEC in Class I, Division 2, cable fittings (such asgeneral purpose, flameproof d, increased safety e, and protection by enclosure t) are also permitted bythe NEC to be connected to the general purpose enclosures. The NEC does not require further markingfor use in the location due to
31、 the risk of confusion with an item that is required by the NEC to be listed forthe location. The wording of the NEC in Articles 501, 502, 503, 505 and 506 is very specific in this regardwith respect to the termination of cables and cords.Marking a general purpose (or others as shown above) cable fi
32、tting or cord connector “Class I, Division2” is the exact same marking permitted by UL 2225 Section 37.10 b). This risks confusion with the fittingsthat are required by the NEC to be listed for the location as they are marked identically. This poses is arisk of explosion in a Classified location as
33、they can be misapplied and not detected by the user or theAHJ prior to start-up of the installation.Copyright 2015 Underwriters Laboratories Inc.UL, in performing its functions in accordance with its objectives, does not guarantee or warrant thecorrectness of Certification Requirement Decisions it m
34、ay issue or that they will be recognized or adoptedby anyone. Certification Requirement Decisions are the opinion of Underwriters Laboratories Inc. inpractically applying the requirements of the standard. They do not represent formal interpretations of thestandard under American National Standards I
35、nstitute (ANSI) processes. UL shall not be responsible toanyone for the use of or reliance upon Certification Requirement Decisions by anyone. UL shall not incurany obligation or liability for damages, including consequential damages, arising out of or in connectionwith the use or reliance upon Certification Requirement Decisions. The electronic version of theCertification Requirement Decision is the current version and previously printed copies may be outdated.This document is published as a service to ULs certification customersSTANDARD NUMBER: UL 2225 -4-
