UL PRODUCT CATEGORY

[Conduit and Fittings] Conduit Fittings, DWTT


See General Information for Conduit and Fittings

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USE

This category covers metallic and nonmetallic conduit fittings, such as connectors, couplings, conduit bodies, short-radius conduit bodies, expansion fittings, locknuts and sealing (liquid-tight) locknuts for use in the assembly of nonmetallic and metallic wiring systems. Also covered are fittings used to provide a transition between metallic and nonmetallic wiring systems. All fittings are intended to be installed in accordance with ANSI/NFPA 70, "National Electrical Code" (NEC), and are intended for installation and use in accordance with the following information and the limitations specified in the appropriate conduit or tubing category.

Some of these fittings are also suitable for use in certain hazardous (classified) locations where unclassified locations fittings are permitted in Articles 501, 502, 503, 505 and 506 of the NEC.

This category also includes metal bushings for use in conduit and insulating bushings for use on conduit inside boxes, gutters, etc.

The individual certifications for each connector used with nonmetallic-sheathed cable may have details about the size and number of the nonmetallic-sheathed cable it will secure.

Male threaded fittings provided with or without a locknut and intended for securement to boxes with threaded entries or fittings with internal female threads (e.g., hubs, conduit bodies, couplings) are provided on the smallest unit shipping carton with installation guidance to install into a box with a threaded entry or hub. See PRODUCT/CARTON MARKINGS below for additional information.

Nipples have only been investigated for use with locknuts.

Fittings with internal female threads (e.g., hubs, conduit bodies, couplings) have only been investigated for use with threaded rigid conduit.

Conduit Bodies — Conduit bodies that are not provided with a volume marking are not intended to enclose splices, taps or devices. Conduit bodies that are provided with a volume marking are covered under Metallic Outlet Boxes (QCIT) or Nonmetallic Outlet Boxes (QCMZ). Conduit bodies certified for use with specific conduit body covers and conduit body covers certified for use with specific conduit bodies are covered under Conduit Bodies and Covers Certified for Use with Specified Equipment (QCKW).

Conduit bodies that have been investigated for a specific combination of conductors are marked, on the conduit body or on or within the unit container of the conduit body, with the maximum number and maximum size of the conductors for which they are intended. For other conductor sizes and combinations, the total cross-sectional area of the fill should not exceed the cross-sectional area of the conductors specified in the marking. The total cross-sectional area is determined using the following type of conductor:

a) Type THHN or T90 Nylon for a fitting for use with 1/2 or 3/4 (16 or 21) trade size conduit or tubing, and
b) Type XHHW or RW90 XLPE for a fitting for use with 1 - 4 (27 - 103) trade size tubing and for use with 1 - 6 (27 - 155) trade size conduit.

Short-radius Conduit Bodies — Short-radius conduit bodies, such as capped elbows and service-entrance elbows, are not intended to contain splices or taps and are not marked with a volume.

Insulating Bushings — Insulating bushings provided either separately or as part of a fitting are suitable for temperatures of 150°C if they are colored black or brown, and for 90°C if any other color unless specifically marked for a higher temperature.

Volume — Fittings or covers for fittings should be judged to contribute no volume other than the equivalent raceway connected to it unless specifically marked.

Sealing (Liquid-tight) Locknuts — Sealing locknuts are intended for use with threaded rigid metal conduit and intermediate metal conduit with one sealing locknut in the outside or the inside and either an ordinary locknut or sealing locknut on the inside of the enclosure for wet locations or liquid-tight applications. Sealing locknuts may also be used with certified wet location or liquid-tight fittings where so marked on the fitting carton and used on the inside of the enclosure.

Reusability — Fittings have not been investigated for reusability. Reusability should be determined by the installer and the Authority Having Jurisdiction.

PRODUCT/CARTON MARKINGS

Male fittings not provided with a locknut, intended for securement to a threaded hub, are marked on the smallest unit shipping carton, "For securement to a threaded hub only," or the equivalent.

Male fittings provided with a locknut, also intended for securement to boxes with threaded entries, hubs or fittings with internal female threads (e.g., conduit bodies, couplings), are marked on the smallest unit shipping carton, "For securement to a threaded hub," or the equivalent.

Fittings for use with electrical metallic tubing (adapters), unthreaded rigid metallic, intermediate metallic conduit or threaded couplings which split to fit over the ends of threaded rigid metal or intermediate metal conduit and then are bolted in place have been tested only for use with steel conduit or tubing unless marked on the fitting or carton to indicate suitability for use with aluminum or other material.

A fitting that is taped completely (from the raceway to the box, or raceway to raceway) is concrete-tight when the product carton is marked "CONCRETE-TIGHT WHEN TAPED."

Fittings for use with flexible metal conduit have been tested only for use with the type of conduit marked on the carton. The carton may be marked "FMC" for all six types of flexible metal conduit, or may also be marked "FE," "AL," "FERW," "ALRW," "FEXRW" or "ALXRW" in any combination for any combination of the six types of flexible metal conduit.

Flexible metal conduit fittings for use with conduit less than 1/2 (16) trade size, having an end stop that does not completely encircle the end of the conduit, will have the carton marking "Armored Cable Bushing Required on Flexible Metal Conduit," or will indicate to use another type of bushing. This bushing will provide protection to the conductors as they exit the conduit into the electrical enclosure.

Threadless conduit fittings suitable for use in concrete or where exposed to the weather are identified by a marking on the carton. Aluminum fittings are not considered suitable for use in concrete or cinder fill unless protected with an asphalt paint or the equivalent.

All liquid-tight fittings are identified on the carton as "Liquid-Tight." The term "Liquid-Tight" on the carton indicates suitability for use where directly exposed to oil spray or to rain.

A liquid-tight fitting is usable in wet locations and is also rain-tight and concrete-tight.

A metallic fitting that physically cannot be connected to any type of conduit other than liquid-tight flexible metallic or nonmetallic Type B conduit can have the marking on carton in which the fitting is packed. It is marked "Liquid-Tight Flexible Nonmetallic Conduit Type B Only," "LFNC-B" or "FNMC-B."

Fittings identified with an enclosure type designation or as "Rain-Tight" or "Liquid-Tight" on the carton are intended for use as indicated in Electrical Equipment for Use in Ordinary Locations (AALZ) under INSTALLATION REQUIREMENTS, Enclosure Types.

Fittings suitable for use in poured concrete or where exposed to rain are so indicated on the device or carton. The terms "Rain-Tight," "Wet Location" or the equivalent on the carton, indicates suitability for use where directly exposed to rain. The term "Concrete-Tight" or equivalent on the carton indicates suitability for use in poured concrete.

Connectors that are also suitable for use with power and control tray cable, nonmetallic-sheathed cable, service-entrance cable, or flexible nonmetallic tubing are so identified by the appropriate marking on the carton. Connectors designated "For Use With Nonmetallic Sheathed Cable" are also suitable for use with multiconductor underground feeder and branch-circuit cable where used in dry locations. Unless marked otherwise on the carton, the connectors are suitable for connection of only one cable per cable entry.

Hubs intended for use with conduit that serves as a service mast in accordance with the NEC are marked on the fitting or carton to indicate suitability for use with service-entrance equipment.

GROUNDING

All metal fittings for metal cable, conduit and tubing are considered suitable for grounding for use in circuits over and under 250 V and where installed in accordance with the NEC, except as noted for flexible metal conduit fittings and liquid-tight flexible metal conduit fittings.

FITTINGS

Flexible Metal Conduit Fittings — Flexible metal conduit fittings designed for connection to the conduit by clamping around the circumference of the conduit are considered suitable for grounding for use in circuits over and under 250 V and when used in accordance with the NEC and containing conductors protected by overcurrent devices rated 20 A or less. Flexible metal conduit fittings of types other than the clamping type mentioned previously in the 3/8 through 3/4 in. trade size and containing conductors protected by overcurrent devices rated 20 A or less are considered suitable for grounding when used in accordance with the NEC. All other trade sizes that have been investigated for grounding are marked "GRND" or the equivalent.

Liquid-tight Flexible Metal Conduit Fittings — Liquid-tight flexible metal conduit fittings in the 1-1/4 in. and smaller trade sizes are considered suitable for grounding for use in circuits over and under 250 V and where installed in accordance with the NEC. A straight metallic fitting for use in direct contact with earth is marked "Direct Burial."

Liquid-tight Flexible Nonmetallic Conduit Fittings — Liquid-tight flexible nonmetallic conduit fittings are marked as follows:

1. A fitting for Type A conduit only is marked "Liquid-Tight Flexible Nonmetallic Conduit Type A Only," "LFNC-A only" or "FNMC-A only."
2. A metallic fitting for Type B is marked "Liquid-Tight Flexible Nonmetallic Conduit Type B Only," "LFNC-B" or "FNMC-B."
3. A nonmetallic fitting for Type B conduit only is marked "Liquid-Tight Flexible Nonmetallic Conduit Type B Only," "LFNC-B only" or "FNMC-B only."
4. A nonmetallic fitting for Type C conduit only is marked "Liquid-Tight Flexible Nonmetallic Conduit Type C Only," "LFNC-C only" or "FNMC-C only."
5. A straight nonmetallic or metallic fitting for use in direct contact with earth is marked "Direct Burial."

Nonmetallic Fittings — Nonmetallic fittings suitable for use with rigid polyvinyl chloride conduit, high-density polyethylene conduit or reinforced thermosetting resin conduit are identified by the appropriate marking on the carton. Such fittings are inherently resistant to atmospheres containing industrial corrosive agents and will also withstand vapors or mists of caustic, pickling, acids, plating baths, hydrofluoric, and chromic acids. Fittings that have been investigated for exposure to other reagents may be identified by the designation "Reagent Resistant" printed on the surface of the fittings. Such special uses are described in greater detail in the individual carton markings or instructions packed with the device. Nonmetallic fittings for use with rigid PVC conduit are suitable with wires rated 90°C or less.

PVC Conduit Fittings — All PVC conduit fittings are designed for connection to both Schedule 40 and 80 PVC conduit by the use of suitable solvent-type cement. Instructions supplied by the solvent-type-cement manufacturer describe the method of assembly and precautions to be followed.

Threadless Fittings — Threadless fittings for use with electrical metallic tubing, rigid metal conduit, intermediate metal conduit or threaded couplings which split to fit over the ends of threaded rigid metal or intermediate metal conduit and then are bolted in place are considered suitable for grounding for use in circuits over and under 250 V and where installed in accordance with the NEC.

Additional Fittings — For additional certifications of conduit fittings, see:

Outlet Bushings and Fittings (QCRV)
Nonmetallic-sheathed Cable Connectors (PXJV)
Insulating Bushings (NZMT)
Rigid Ferrous Metal Conduit (e.g., straight threaded couplings) (DYIX)
Rigid Nonferrous Metallic Conduit (e.g., straight threaded couplings) (DYWV)
Intermediate Ferrous Metal Conduit (for elbows) (DYBY)
Armored Cable Connectors, Type AC (for connectors which may also be suitable for use with flexible cord, flexible metal conduit and metal-clad (Type MC) cable) (AWSX)

PRODUCT IDENTITY

One of the following product identities appears on the product:

    Adapter

    Conduit Fitting

    Coupling

Other product identities may be used as shown in the individual certifications.

RELATED PRODUCTS

A hub having provision for attachment of a grounding conductor may additionally be covered as a grounding and bonding hub under Grounding and Bonding Equipment (KDER).

ADDITIONAL INFORMATION

For additional information, see Electrical Equipment for Use in Ordinary Locations (AALZ).

REQUIREMENTS

The basic standards used to investigate products in this category are ANSI/UL 514B, "Conduit, Tubing, and Cable Fittings," ANSI/UL 6, "Electrical Rigid Metal Conduit - Steel," ANSI/UL 6A, "Electrical Rigid Metal Conduit - Aluminum, Red Brass, and Stainless Steel," ANSI/UL 1242, "Electrical Intermediate Metal Conduit - Steel," or ANSI/UL 651, "Schedule 40 and 80 Rigid PVC Conduit."

Products that employ ANSI/UL 514B are investigated to the 6th ed. (issued July 13, 2012; last revised November 21, 2014 ). All other products investigated to ANSI/UL 514B are identified by the specific standard/edition/date in the individual certifications.

UL MARK

The UL symbol on the product and the Certification Mark of UL on the smallest unit container in which the product is packaged is the only method provided by UL to identify products manufactured under its Certification and Follow-Up Service. The Certification Mark for these products includes the UL symbol, the words "CERTIFIED" and "SAFETY," the geographic identifier(s), and a file number.

Alternate UL Mark

The UL symbol on the product and the Listing Mark of UL on the smallest unit container in which the product is packaged is the only method provided by UL to identify products manufactured under its Listing and Follow-Up Service. The Listing Mark for these products includes the UL symbol (as illustrated in the Introduction of this Directory) together with the word "LISTED," a control number, and the product name "Conduit Fitting," "Adapter" or "Coupling," or other appropriate product name as shown in the individual Listings.

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UL, in performing its functions in accordance with its objectives, does not assume or undertake to discharge any responsibility of the manufacturer or any other party. UL shall not incur any obligation or liability for any loss, expense or damages, including incidental or consequential damages, arising out of or in connection with the use, interpretation of, or reliance upon this Guide Information.

AdaptersBox ConnectorsBushingsCable Riser SupportsCable SupportsCapped ElbowsChase NipplesConduit BodiesConduit Female AdaptersConduit FittingsConduit Male AdaptersConduit UnionsConnectorsConnectors, BoxConnectors, ConduitCouplersCouplingsElbowsEllsEndsExpansion FittingsFemale AdaptersGasket AssembliesHandy ElsHubsInsulating BushingsJake ElsLBLLLocknutsLRMale AdaptersMiddlesNipplesNipples, ChasePlastic BushingsPull BoxesPull ElsPulling ElsRain Tight FittingsRain Tite FittingsRaintight FittingsRaintite FittingsRain-tight FittingsRain-tite FittingsREReducer BushingsReducersReducing CouplingsService ElsService-entrance Hubs
Last Updated on 2018-11-30
DWTT.GuideInfo DWTT Active 20181130 20181130

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