Conduit, It Shall Be Contained in the Conduit with the Circuit Conductors
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conduit, it shall be contained in the conduit with the circuit 351-9: Accept C~ 8 conductors. Fittings and boxes shall be bonded or grounded in SUBMII-FER: TSC-Approved for the Purpose accordance with Article 250. 138 See the Technical Subcommittee "Recommendations" SUBSTANTIATION: There is a very pressing need for an NEC under the definition of "Approved for the Purpose" in Article article to cover liquidtight flexible nonmetallic conduit for a 100. growing number of present day applications. Such a product is SUBSTANTIATION: See the TSC "findings" under the definltion of being produced and has been used extensively in the machine tool "Approved for the Purpose" in Article 100. industry and other related uses for the past eleven years. At PANEL RECOMMENDATION: Accept as Revised: the present time there is no NEC reference for this material. I Delete the words "the purpose" and substitute "grounding." It may be agreed that the need for this article is such that VOTE ON PANEL RECOF~4ENDATION: Unanimously Affirmative. it might be adopted based on the known, widespread and successful use in industry of liquidtight flexible nonmetallic conduit. Once in the NEC, such a product would immediately come under the scrutiny of UL and would be required to meet the 351-9, Exception: Accept ' CMP 8 levels of safety now required for other metallic and nonmetallic SUBMITTER: TSC-Approved for the Purpose raceways before being eligible for UL or equivalent listing and 139 See the Technical Subcommittee "Recnmmendations" for use wherever inspection under the NEC was required. un--n'de~-t'~e definition of "Approved for the Purpose" in Article 220-9 of NFPA #79 Electrical Standard for Met61working Machine 100. Tools covers liquidtight flexible nonmetallic conduit and SUBSTANTIATION/ See the TSC "findings" under the definition of fittings. "Approved for the Purpose" in Article 100. E13.3.2 of EMP and EGP-I-1967 Joint Industrial Council PANEL RECOI~NIENDATION: Accept as Revised: Electrical Standard covers Nonmetallic Conduit¢ I Delete the words "the purpose° and substitute "grounding." Attached* is literature on this material: VOTE ON PANEL RECOMMENDATION: Unanimously Affirmative. (a) Anaconda Standard for Liquid Tight Flexible Nonmetallic Electrical Conduit; latest revision 6/12/78. (b) Anaconda Bulletin S-550 (BED), pages $3 and $7. *Attachments have been supplied to ~MP members. 351-10: Accept CMP 8 PANEL RECOMMENDATION: Accept as Revised: SUBMITTER: Dan Leaf, Westlake Village, CA I)ITOIR~TAIZT.• 140 Delete words "in concealed work" from the title, ARTICLE XXX - Liquidtight Flexible Nonmetallic Conduit an--n'B-t'F~e-word "concealed" from the text. XXX-I. Scope. This article covers use and installation SUBSTANTIATION: No restriction, per se, is placed on the requirements for liquidtight flexible nonmetallic conduit for maximum number of bends in exposed work. No limit on number of industrial application. bends could result in de~nage to conductors, in a run with XXX-2. Definition. Liquidtight flexible nonmetallic conduit is excessive number of bends, or could encourage instaliatlon of a raceway of circular cross sectioh having a smooth seamless conductors prior to conduit installation, with conduit then inner core and cover bonded together and having one or more installed as a cable system. A limit on number of bends for reinforcement layers between the core and cover. This conduit exposed work would bring this section in conformity with the is flame-resistant and with fittings is approved for the requirements for other raceway systems, such as 345-12, 346-11, installation of electrical conductors. 347-14, and 348-10. XXX-3. Use. PANEL RECOI~ENDATION: Accept as Revised: (a) Liquidtight flexible nonmetal)ic conduit shall be Delete "For concealed raceway" after the words "A run of permitted to be used: conduit" and delete "in Concealed Work" from title. (1) in exposed locations; VOTE ON PANEL RECOMMENDATION: Unanimously Affirmative. (2) where flexibility is required for installation, operation or maintenance; (3) where protection of the contained conductors is required from vapors, liquids or solids. ARTICLE 352 -- SURFACE RACEWAYS (b) Liquidtight flexible nonmetallic conduit shall not be used: 352-I: Accept CMP 8 (1) where subject to ohysical damage; SUBMITTER: TSC-Approved for the Purpose (2) where any combination of ambient and conductor ]~l~b-O-S'~-~.• 141 See the Technical Subcommittee "Recummendations" temperatures is In excess of that for which the liquidtight un--n-d'e-r-'t~e definition of "Approved for the Purposeu in Article flexible nonmetallic conduit is approved; 100. (3) in lengths longer than 6 feet; SUBSTANTIATION: See the TSC "findings" under the definition of Exception: where approved for special installations. "Approved for the Purpose" in Article 100. (4) where voltage of contained conductors is in excess of PANEL RECOMMENDATION: Accept as Revised: 600 volts, nominal. Delete the words "unless approved for the purpose" and XXX-4. Size. The sizes of liquidtight flexible nonmetallic substitute "unless otherwise approved." conduit shall be electrical trade sizes 1/2 inch to 1 1/2 inch VOTE ON PANEL RECOMMENDATION: Unanimously Affirmative. inclusive. XXX-5. Nund}er of Conductors. The nuraber of conductors permitted in a single conduit shall be in accordance with the percentage fill specified in Table 1, Chapter 9. 352-1: Reject CMP 8 XXX-6. Fittings. Liquidtight flexible nonmetallic conduit SUBMITTER: S. J. Casasant~, The Wiremold Co. shall be used only with terminal fittings identified for such ~142 Add the word "only" at the end .of the first use. • ~. Add new (1) as follows: (1) in damp locations; XXX-7. Grounding. Where a grounding conductor is required for unless approved for the purpose. Renumber remainder of the circuits installed in liquidtight flexible nonmetallic paragraph. conduit, it shall be contained in the conduit with the circuit SUBSTANTIATION: The present wording is being interpreted as conductors. Fittings and boxes shall be bonded or grounded in permitting use of surface raceways in damp locations. The accordance with Arti.cle 250. addition of the word only in the above proposal clarifies that VOTE ON PANEL RECOMMENDATION: Unanimously Affirmative. surface raceways are i~tended for use in dry locations only, COMMENT ON VOTE: unless approved for use in damp locations. 8RETING: We believe the use of this material has been limited Panel 8 comment to Proposal No. 160, for the 1978 Code, for "connection to frequently moving parts" under the provisions "Product not considered suitable for damp locations," is offered of Section 210-5(e) of NFPA Standard No. 79. This possible as justification for the above Woposal. additional use restriction needs further clarification. PANEL RECO)~(ENDATION: Reject. PANEL C~ENT: No additional clarification would be achieved by this Proposal. VOTE ON PANEL RECOMMENDATION: Unanimously Affirmative. ARTICLE 351 -- LIQUIDTIGHT FLEXIBLE METAL CONDUIT i 351-7: Accept CMP 8 SUB)lITTER: TSC-Approved for the Purpose 352-1: Reject CMP 8 137 See the Technical Subcommittee "Reco~ndations" SUBMITTER: O. E. Dillon, Border County Div. IAEI un--n-d'e'r-~'~e definition of "Approved for the Purpose'" in Article FR-O-~'O-~-L-~: 143 In the first sentence, add the word "only" after 100. the word "permitted." In the second sentence (1), delete the SUBSTANTIATION: See the TSC "findings" under the definition of word "severe." In the second sentence (2), add the words "there. "Approved for the Purpose" in Article 100. are" after the word "where." PANEL RECOI~ENDATION: Accept as Revised: SUBSTANTIATION: The language is permissive and does not Delete the words "approved for the purpose" and add "approved" restrict the use of surface raceways. See the attached opinion* !after the word "with." of the San Diego City Attorney. VOTE ON PANEL RECOMMENDATION: Unanimously Affirmative. *See Border County Div. IAEI substantiation for proposal for 110-16(a). PANEL RECOMMENDATION: Reject. PANEL COIC¢~ENT: The present wording adequately reflects the Panel's intent. VOTE ON PANEL RECO@~IENDATION: Unanimously Affirmative. 154 conduit, it shall be contained in the conduit with the circuit 351-9: Accept C~ 8 conductors. Fittings and boxes shall be bonded or grounded in SUBMII-FER: TSC-Approved for the Purpose accordance with Article 250. 138 See the Technical Subcommittee "Recommendations" SUBSTANTIATION: There is a very pressing need for an NEC under the definition of "Approved for the Purpose" in Article article to cover liquidtight flexible nonmetallic conduit for a 100. growing number of present day applications. Such a product is SUBSTANTIATION: See the TSC "findings" under the definltion of being produced and has been used extensively in the machine tool "Approved for the Purpose" in Article 100. industry and other related uses for the past eleven years. At PANEL RECOMMENDATION: Accept as Revised: the present time there is no NEC reference for this material. I Delete the words "the purpose" and substitute "grounding." It may be agreed that the need for this article is such that VOTE ON PANEL RECOF~4ENDATION: Unanimously Affirmative. it might be adopted based on the known, widespread and successful use in industry of liquidtight flexible nonmetallic conduit. Once in the NEC, such a product would immediately come under the scrutiny of UL and would be required to meet the 351-9, Exception: Accept ' CMP 8 levels of safety now required for other metallic and nonmetallic SUBMITTER: TSC-Approved for the Purpose raceways before