UL PRODUCT CATEGORY

[Receptacles] Receptacles for Plugs and Attachment Plugs, RTRT


See General Information for Receptacles

200.10(B)210.21(B)250.124(A)250.146(A)250.146(B)250.146(D)300.15(E)300.15(F)334.30(C)334.40(B)334.40(C)400.7(B)406.11406.12406.13406.14406.3(A)406.3(B)406.3(C)406.3(D)406.4(D)(2)406.4(D)(5)406.4(D)(6)406.5(C)406.7406.9(A)406.9(B)(1)410.59(B)410.62(C)(1)(2)(C)430.109(F)430.81(B)440.13440.55(B)440.63502.145(B)503.145513.7(E)515.7(B)516.7(B)517.13(B)517.13517.16517.18(B)517.18(C)517.19(B)517.19(G)517.30(E)517.33(A)517.42(F)517.61(C)(2)517.72(C)520.45520.46530.18(F)530.21(B)530.22(A)530.22(B)545.10550.10(C)550.13(A)550.13(C)550.13(D)550.15(I) Exc.550.16(A)(2)550.20(A)550.32(C)550.32(E)551.20(F)551.30(B)551.41(A)551.47(E) Exc. No. 1551.52551.56(C)551.81552.44(C)(2)552.48(E) Exc. No. 1552.53552.59(A)555.19(A)(4)590.4(D)620.23(C)620.24(C)626.24(B)626.31(C)640.41640.7(C)647.7(B)660.4(B)660.48675.17680.43(A)680.56(D)694.7(E)720.6200.10(B)210.21(B)250.124(A)250.146(A)250.146(B)250.146(D)300.15(E)300.15(F)334.30(C)334.40(B)334.40(C)400.7(A)(11)400.7(B)406.11406.12(A)406.12(B)406.12 406.15406.3(A)406.3(B)406.3(C)406.3(D)406.4(D)(2)406.4(D)(5)406.4(D)(6)406.5(C)406.7406.9(A)406.9(B)(1)410.59(B)410.62(C)(1)(2)(C)430.109(F)430.81(B)440.13440.55(B)440.63502.145(B)(1)503.145513.7(E)515.7(B)516.7(B)517.13(B)517.13517.18(B)517.18(C)517.19(B)517.19(C)(1)517.19(C)(2)517.19(H)517.30(E)517.33(A)517.41(E)517.42(F)517.61(C)(2)517.72(C)520.45520.46530.18(F)530.21(B)530.22(A)530.22(B)545.10550.10(C)550.13(A)550.13(C)550.13(D)550.15(I) EXC.550.16(A)(2)550.20(A)550.32(C)550.32(E)551.20(F)551.30(B)551.41(A)551.47(E) EXC. NO. 1551.52551.56(C)551.81552.44(C)(2)552.48(E) EXC. NO. 1552.53552.59(A)555.19(A)(4)590.4(D)620.23(C)620.24(C)626.24(B)626.31(C)640.41640.7(C)647.7(B)660.4(B)660.48675.17680.43(A)680.56(D)694.7(E)720.6

GENERAL

This category covers general-use receptacles for use in wiring systems recognized by ANSI/NFPA 70, "National Electrical Code" (NEC), and outlets for use in appliances and fixtures. It also covers some attachment plugs, male inlets, and cord connectors with nonstandard slot or blade configurations which are part of a line of wiring devices including receptacles. Other similar attachment-plug devices are covered under Attachment Plugs (AXGV).

A receptacle employing an integral thermal-interruption mechanism is not intended for hospital locations or other locations where critical patient care equipment is used. Additionally, a receptacle employing an integral thermal-interruption mechanism has not been investigated for its ability to reduce the safety hazards caused by overheating and overloaded circuits

A receptacle employing an integral thermal-interruption mechanism has been investigated to confirm the manufacturer's stated thermal-interruption temperature range.

PRODUCT TYPES

Appliance, Equipment and Fixture Outlets — When an outlet is installed in equipment with a conductive mounting surface, the face of the receptacle should project a minimum of 3/32 in. and a maximum of 3/16 in. from the mounting surface.

Clock Receptacle — A flush receptacle having a recessed cord-storage space in an integral flush-device cover plate, commonly used with wall clocks.

Display Receptacle — Display receptacles are provided with a cover plate for flush-mounted wiring devices or outlet-box cover and closure plug or plugs. They are intended for use in show window floors and similar locations where the device is not likely to be subjected to scrub water. They are not intended to be used as substitutes for floor boxes, which are covered under Metallic Outlet Boxes (QCIT) and Nonmetallic Outlet Boxes (QCMZ).

Flush Receptacle — Flush receptacles are intended for mounting in or on an outlet box, an outlet-box cover or a cover plate for flush-mounted wiring devices for fixed installation on a branch circuit. They are not intended to be field mounted on outlet-box covers solely by the center cover-plate screw. They may be employed in damp and wet locations when installed in an appropriate enclosure. See Metallic Outlet Boxes (QCIT) and Nonmetallic Outlet Boxes (QCMZ) for information on outlet boxes and covers suitable for use in damp and wet locations.

Hospital Receptacle — Receptacles for hospital use in other than hazardous (classified) locations in accordance with Article 517 of the NEC are identified (1) by the marking "Hospital Only" (used to identify a specific grounding locking configuration rated 20 A, 125 V used for the connection of mobile x-ray and similar equipment), or (2) by the marking "Hospital Grade" (or "Hosp. Grade" or "HG") and a green dot on the face of the receptacle. The identification is visible during installation on the wiring system or, in the case of the appliance outlet, after installation on the utilization equipment.

Interchangeable (Modular) Receptacle — Interchangeable receptacles are flush receptacles that are assembled as single, duplex or triplex outlets in the field from a system of individual outlet modules, mounting yokes, and/or cover plates for flush-mounted wiring devices.

Isolated Ground Receptacle — Grounding-type receptacles in which the grounding terminals are purposely insulated from the mounting means of receptacles and associated metal cover plates as permitted by Section 250.146(D) (formerly Exception No. 4 to Section 250-74) of the NEC are so identified by an orange triangle marked on the face of the receptacle.

Lighted Receptacle — Lighted receptacles employ an integral lens (jewel) and electrical or electronic components that produce light. Lighted receptacles are either power-indicating type, which illuminate when power is on, or illuminating/nightlight type.

Pendant Receptacle — Pendant receptacles include an enclosure with cover plate and strain-relief means, intended to be assembled at the end of flexible cord, for use in branch-circuit applications.

Pop-out Receptacle — A retractable flush-mount receptacle intended for mounting in or on an outlet box, an outlet-box cover, or a flush device plate for fixed installation on a branch circuit. Pop-out receptacles are only intended to be installed in a wall and other vertical surfaces.

Pop-up Receptacle Assembly — An assembly consisting of a retractable flush-mount receptacle, outlet box and flush device cover plate intended for fixed installation on a branch circuit. A pop-up receptacle assembly is suitable for installation in a kitchen or bathroom countertop. They are provided with one or more receptacle outlets. The outlets are retractable for storage below a counter surface. They are intended for installation in accordance with Sections 210.52(C)(5) and 406.5(E) of the NEC.

Receptacle Providing Power to Class 2 Equipment — A flush-mounted receptacle with an integral power supply with one or more Class 2 output low-voltage connectors, a Class 2 separable conductor lead assembly, or both, intended to be installed in an outlet box.

Self-contained Receptacle — Self-contained receptacles include an enclosure and mounting means intended for flush mounting without the use of a separate flush device or other outlet box. They are intended for use with Types NM and NMC cable in accordance with the NEC, specifically, Sections 300.15(E), 334.40(C), 545.10, 550.15(I) Exception, 551.47(E) Exception No. 1 and 552.48(E) Exception No. 1, and are so identified by specific markings on the carton in which they are packed. Devices employing insulation-displacement terminals are intended for assembly with specific installation tools only. Reference must be made to the installation instructions regarding the proper tool and the number of cables (per entry) with which the devices are intended to be used.

Self-grounding Receptacle — Self-grounding receptacles have special integral means for establishing the grounding circuit between device yokes and (1) the grounded metallic flush-type boxes, or (2) the grounded nonmetallic flush-device boxes employing a grounding strap and terminal; without the use of bonding jumpers as permitted by Section 250.146(B) (formerly Exception No. 2 to Section 250-74) of the NEC. These devices are identified by the statement: "This receptacle is Listed by Underwriters Laboratories Inc. and has a special pressure spring clip to establish the grounding circuit between device yokes and (1) the grounded metallic flush-type boxes, or (2) the grounded nonmetallic flush device boxes employing a grounding strap and terminal; without the use of bonding jumpers as permitted by Section 250.146(B) of the National Electrical Code" (or equivalent wording), which may appear on the device or shipping carton.

Surface Receptacle — Surface receptacles include an enclosure and mounting means for surface mounting without the use of a separate outlet box. They are intended for connection to exposed nonmetallic-sheathed cable as permitted by Article 334 of the NEC. Some may also accept other wiring systems. Surface receptacles rated 50 A that employ enclosures of insulating materials are not intended for use in applications where they are likely to be subject to severe mechanical abuse.

Tamper-resistant Receptacle — Receptacles for use in dwelling units in accordance with the NEC, specifically, Section 406.12, or pediatric patient care areas in accordance with Article 517 of the NEC. Tamper-resistant receptacles are identified by the words "Tamper Resistant" (or the letters "TR") where they will be visible after installation with the cover plate removed. Tamper-resistant receptacles may be of the general grade, hospital grade or isolated ground type.

Weather-resistant Receptacle — Receptacles for use in wet and damp locations in accordance with Article 406 of the NEC. Weather-resistant receptacles are identified by the words "Weather Resistant" (or the letters "WR") where they will be visible after installation with the cover plate secured as intended.

TERMINALS

Terminals of the wire-binding screw, setscrew, or screw-actuated back-wired clamping types should be tightened to the manufacturer's recommended torque value. If this information is missing or not available, contact the manufacturer.

Terminals of 15 and 20 A receptacles not marked "CO/ALR" are for use with copper and copper-clad aluminum conductors only. Terminals marked "CO/ALR" are for use with aluminum, copper and copper-clad aluminum conductors.

Terminals of receptacles rated 30 A and above not marked "AL-CU" are for use with copper conductors only. Terminals of receptacles rated 30 A and above marked "AL-CU" are for use with aluminum, copper and copper-clad aluminum conductors.

Terminals marked "75 C" may be wired using the ampacities for conductors rated 75°C as well as conductors rated 60°C in Table 310.15(B)(16) of the NEC.

Terminals of the wire-binding screw, setscrew, or screw-actuated back-wired clamping types are suitable for use with both solid and stranded building wires.

Terminals of a receptacle are permitted for use with certified field-installed crimped-on wire connectors or an assembly, if so identified by the manufacturer.

A receptacle may also be provided with conductor leads with factory-installed crimped-on connectors. Such connectors may be either attached to the receptacle terminal or are provided with the receptacle in the smallest unit shipping container and are suitable for use with the terminal of the receptacle.

Screwless terminal connectors of the conductor push-in type (also known as "push-in-terminals") are restricted to 15 A branch circuits and are for connection with 14 AWG solid copper wire only. They are not intended for use with aluminum or copper-clad aluminum wire, 14 AWG stranded copper wire, or 12 AWG solid or stranded copper wire.

Single and duplex receptacles rated 15 and 20 A that are provided with more than one set of terminals for the connection of line and neutral conductors have been investigated to feed branch-circuit conductors connected to other outlets on a multi-outlet branch circuit, as follows:

  • Back-wire (screw-actuated clamp type) terminations with multiple wire-access holes used concurrently to terminate more than one conductor
  • Side-wire (binding screw) terminals used concurrently with their respective push-in (screwless) terminations to terminate more than one conductor

Single and duplex receptacles rated 15 and 20 A that are provided with more than one set of terminals for the connection of line and neutral conductors have not been investigated to feed branch-circuit conductors connected to other outlets on a multi-outlet branch circuit, as follows:

  • Side-wire (binding screw) terminal with its associated back-wire (screw-actuated clamp type) terminal
  • Multiple conductors under a single binding screw
  • Multiple conductors in a single back-wire hole

Duplex receptacles rated 15 and 20 A that are provided with break-off tabs may have those tabs removed so that the two receptacles may be wired in a multi-wire branch circuit or multiple branch circuits.

HORSEPOWER RATINGS

In addition to ampere and voltage ratings, standard AC horsepower ratings corresponding to the ampere and voltage ratings for specific general-use receptacles not incorporating overcurrent protection or a switch are given in the table below. For a Design E motor rated more than 2 horsepower, it is necessary to use a receptacle having a horsepower rating not less than 1.4 times the standard AC horsepower rating. The NEMA configuration designation is included for reference. Devices of configurations other than those indicated in the table have horsepower ratings only if such ratings are marked on the device.

HORSEPOWER RATINGS FOR NEMA CONFIGURATION RECEPTACLES

Amps
Rating
AC V
Rating
No. of
Phase
No. of
Poles

No. of Wire
NEMA
Dsg
HP
Rating
15 125 1 2 2 1-15, L1-15 1/2
125 1 2 3 5-15, L5-15 1/2
250 1 2 2 2-15 1-1/2#, %
250 1 2 3 6-15, L6-15 1-1/2#, %
277 1 2 3 7-15, L7-15 2
125/250 1 3 4 14-15 1-1/2 L-L#, %
1/2 L-N
250 3 3 3 11-15, L11-15 2
250 3 3 4 15-15 2
120/208 3 4 4 18-15 2
20 125 1 2 3 5-20, L5-20 1
250 1 2 2 2-20, L2-20 2#, %
250 1 2 3 6-20, L6-20 2#, %
277 1 2 3 7-20, L7-20 2
480 1 2 3 L8-20 3
125/250 1 3 3 10-20, L10-20 2 L-L#, %
1 L-N
125/250 1 3 4 14-20, L14-20 2 L-L#, %
1 L-N
250 3 3 3 11-20, L11-20 3
250 3 3 4 15-20, L15-20 3
20 480 3 3 3 L12-20 5
480 3 3 4 L16-20 5
120/208 3 4 4 18-20, L18-20 2
120/208 3 4 5 L21-20 2
277/480 3 4 4 L19-20 5
277/480 3 4 5 L22-20 5
30 125 1 2 3 5-30, L5-30 2
250 1 2 2 2-30 2#, %
250 1 2 3 6-30, L6-30 2#, %
277 1 2 3 7-30, L7-30 3
480 1 2 3 L8-30 5
125/250 1 3 3 10-30, L10-30 2 L-L#, %
2 L-N
125/250 1 3 4 14-30, L14-30 2 L-L#, %
2 L-N
250 3 3 3 11-30, L11-30 3
250 3 3 4 15-30, L15-30 3
480 3 3 3 L12-30 10
480 3 3 4 L16-30 10
120/208 3 4 4 18-30, L18-30 3
120/208 3 4 5 L21-30 3
277/480 3 4 4 L19-30 10
277/480 3 4 5 L22-30 10
50 125 1 2 3 5-50 2
250 1 2 3 6-50 3#, %
277 1 2 3 7-50 5
125/250 1 3 3 10-50 3 L-L#, %
2 L-N
125/250 1 3 4 14-50 3 L-L#, %
2 L-N
250 3 3 3 11-50 7-1/2
250 3 3 4 15-50 7-1/2
120/208 3 4 4 18-50 7-1/2
60 125/250 1 3   14-60 3 L-L#, %
2 L-N
250 3 3 4 15-60 10
120/208 3 4 4 18-60 7-1/2
L-L#: Motor connected line-to-line
L-N: Motor connected line-to-neutral
%: Also suitable for 208 V motor applications at the indicated horsepower rating

For three-phase devices, the horsepower ratings indicated are for three-phase motor loads.

Refer to ANSI/NEMA WD 6 (2002), "Wiring Devices - Dimensional Specifications," for configurations of the NEMA designations.

PRODUCT IDENTITY

One of the following product identities appears on the product:

    Attachment Plug

    Attachment Plug with Overload Protection

    Fuseless Attachment Plug

    Plug

    Recept.

    Receptacle

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

ADDITIONAL INFORMATION

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

REQUIREMENTS

The basic standard used to investigate products in this category is ANSI/UL 498, "Attachment Plugs and Receptacles."

Where indicated in the individual certifications, receptacles have additionally been investigated to Federal Specification W-C-596, "General Specification for Electrical Power Connectors."

UL MARK

The Certification Mark of UL on the product, or the UL symbol on the product and the Certification Mark 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.

Receptacles additionally investigated to Federal Specification W-C-596 are identified by the capital letters "F" and "S," each in a wing on either side of the UL symbol. The Federal Specification number "W-C-596F" or "W-C-596G," or the Federal Specification part number (which consists of the appropriate specification sheet and dash number described in the specification) may also be included on the product or on the smallest container in which the product is packaged.

Alternate UL Mark

The Listing Mark of UL on the product, or the UL symbol on the product and the Listing Mark 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 one of the following product names: "Attachment Plug," "Plug," "Receptacle" (or "Recept."), "Attachment Plug with Overload Protection," "Attachment Plug Fuseless," or other appropriate product name as shown in the individual Listings.

Receptacles additionally investigated to Federal Specification W-C-596 are identified by the capital letters "F" and "S," each in a wing on either side of the UL symbol. The Federal Specification number "W-C-596F" or "W-C-596G," or the Federal Specification part number (which consists of the appropriate specification sheet and dash number described in the specification) may also be included on the product or on the smallest container in which the product is packaged.

* * * * * * * * * * * * * * * * * * * * * * * * *

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.

Attachment-plug ReceptaclesAttachment Plugs, FuselessAttachment Plugs with Overload ProtectionClock ReceptaclesDisplay ReceptaclesFlush ReceptaclesFuseless Attachment PlugsHospital-grade ReceptaclesHospital ReceptaclesInterchangeable ReceptaclesIsolated Ground ReceptaclesLighted ReceptaclesModular ReceptaclesPendant Receptacle BoxesPendant Receptacle EnclosuresPendant ReceptaclesPlug ReceptaclesPlugsPop-out ReceptaclesPop-up Receptacle AssembliesReceptacle Assemblies, Pop-upReceptacle Boxes, PendantReceptacle Enclosures, PendantReceptaclesReceptacles, Attachment PlugReceptacles, ClockReceptacles, DisplayReceptacles, FlushReceptacles, HospitalReceptacles, Hospital GradeReceptacles, InterchangeableReceptacles, Isolated GroundReceptacles, LightedReceptacles, ModularReceptacles, PendantReceptacles, PlugReceptacles, Pop-outReceptacles, Self-containedReceptacles, Self-groundingReceptacles, SurfaceReceptacles, Tamper ResistantReceptacles, Weather ResistantSelf-contained ReceptaclesSelf-grounding ReceptaclesSurface ReceptaclesTamper-resistant ReceptaclesWeather-resistant Receptacles
Last Updated on 2018-09-07
RTRT.GuideInfo RTRT Active 20180907 20180907

The appearance of a company's name or product in this database does not in itself assure that products so identified have been manufactured under UL's Follow-Up Service. Only those products bearing the UL Mark should be considered to be Certified and covered under UL's Follow-Up Service. Always look for the Mark on the product.

UL permits the reproduction of the material contained in the Online Certification Directory subject to the following conditions: 1. The Guide Information, Assemblies, Constructions, Designs, Systems, and/or Certifications (files) must be presented in their entirety and in a non-misleading manner, without any manipulation of the data (or drawings). 2. The statement "Reprinted from the Online Certifications Directory with permission from UL" must appear adjacent to the extracted material. In addition, the reprinted material must include a copyright notice in the following format: "© 2019 UL LLC".