RACO ® STEEL BOXES, COVERS AND ACCESSORIES STEEL BOXES, COVERS AND ACCESSORIES GENERAL INFORMATION STANDARDS, 2014 NATIONAL ELECTRICAL CODES® Applications: Steel Boxes Most Raco® Boxes Have At Least One • UL Listed – Standard 514-A, file E195978 RACO® high-quality steel boxes: Tapped #10-32 Grounding Hole (“QCIT” Category) • Are used in branch circuit wiring • The products that do not have a grounding • Boxes and covers are listed for their screw hole are: plenum boxes catalog Electrical Applications (electrical codes), UL • Accommodate wiring devices, such as numbers 226 and 239 Electrical Construction Equipment Online switches and receptacles Directory (electrical codes). • Most may also serve as fixture supports Product Features: Combination Screw Heads • Boxes are listed for Fire Resistance • Provide excellent protection for wiring Directory, including the Two-Hour Fire system or devices • Cover and clamp screws have combination Rating, (building codes) UL Orange Book slotted/Phillips heads • Must be closed with a cover, light fixture • UL Classified Standard – UL263 file canopy or wallplate • Self-tapping screws provide for 100% R16536, CEYY, QBWY thread engagement • Permit access to conductors for • CSA Certified – C22.2 #18, CSA File maintenance Metallic Boxes: Fire Resistance Rating LR-1082 • Allow for branch circuit runs Wall Penetrations* • ANSI/NEMA OS1 • Provide two-hour fire rating for 4x4 or Listed single- and double-gang metallic outlet • Federal Manufacturer’s number 28488 smaller wall opening and switch boxes with metallic or nonmetallic cover plates, also 4x4 and octagon boxes may Product Features: Outlet Boxes for be used in bearing and non-bearing wood stud Fixture or Fan Support For installation guidelines and to learn more and steel stud walls with ratings not exceeding ® These high-quality boxes: about RACO products, visit the NEMA website two hours. at http://www.nema.org. • Are listed to support lighting fixture The surface area of individual metallic outlet canopies or fans The National Electrical Manufacturers or switch boxes shall not exceed 16 square Association (NEMA) website is a valuable • Feature oversized #10 screws to provide inches through a fire rated wall. The aggregate electrical resource providing the information strength and rigidity surface area of the boxes shall not exceed you need - quickly. 100 square inches per 100 square feet. Boxes Product Features: TKO® Knockouts located on opposite sides of walls or partitions ® ® RACO UL Guide Cards • TKO knockouts offer greater flexibility with shall be separated by a horizontal distance of RACO® combination 1/2" and 3/4" knockout You can download and print out any or all UL 24 inches. Guide Cards issued to RACO®. o Just g t the • Stock just one product instead of two or The metallic outlet or switch boxes shall RACO website at www.hubbell-raco.com and three be securely fastened to the studs, and the click on the UL symbol. Every RACO UL guide • One product for the installer to carry opening in the wallboard facing shall be cut card is listed by product category. Click on the TKO® Provides Reliable Grounding Path so that the clearance between the box and the live link (right hand column in blue type) and wallboard does not exceed 1/8 inch. the UL Guide Card will appear. Save to your • Independent tests conducted by UL prove computer or print it out. that the TKO passes the same high-current * Reference: UL Fire Resistance Directory fault test used to test grounding bushings (Orange Book) UL Guide Information Pages and ground lugs Standard Material: Steel Covers, Outlet UL publishes the most frequently asked ® • RACO TKO knockout is UL Listed, providing And Switch Boxes questions concerning product ratings, bonding without the use of bonding jumpers • Steel boxes and covers are made of .0625 configurations, installations, uses allowed or • Suitable for bonding without any additional inch thick pre-galvanized sheet steel not allowed, grounding and bonding, and much bonding means around concentric (or • Handy Box covers are made of .030 inch more. Each UL category has a unique Guide eccentric, TKO) knockouts where used in thick galvanized sheet steel Information Page. Live links to each UL Guide circuits above or below 250V Information Page appears just below the RACO • This knockout does not impair the electrical Compliances UL guide card for each product category. connection to ground RACO® steel boxes and covers generally carry the following compliance ratings. Check specific catalog pages for individual compliances. A2 RACO BOXES, COVERS AND ACCESSORIES STEEL BOXES, COVERS AND ACCESSORIES GENERAL INFORMation STANDARDS, 2014 NATIONAL ELECTRICAL CODE® Wiring Capacity: Steel Outlet and the space provided by plaster rings, domed a single volume allowance in accordance with Switch Boxes; Cubic Inches covers, extension rings, etc., that are marked NEC® 314.16(B)(3) shall be made for each with their volume in cubic inches or are made type of fitting based on the largest conductor Maximum Number of Conductors or from boxes the dimensions of which are listed present in the box. Minimum Size Box Required – National in Table 314.16(A). Electrical Code Article 314.16 (A and (4) Device or Equipment Fill. For each yoke B) also table 314.16(A) (1) Standard Boxes. The volume of standard or strap containing one or more devices or boxes that are not marked with a cubic inch equipment, a double volume allowance in The purpose of NEC® Article 314.16 is to capacity shall be as given in *Table 314.16(A). accordance with NEC® 314.16(B)(4) shall determine the maximum conductor count be made for each yoke or strap based on the or the minimum box size required for an (2) Other Boxes. Boxes 100 cubic inches largest conductor connected to a device(s) or application. It also may be used to determine (1,640 cu. cm3.) or less, other than those equipment supported by that yoke or strap. how many other conductors may be added described in table, and nonmetallic boxes without exceeding the Code-prescribed limit. shall be durably and legibly marked by the (5) Equipment Grounding Conductor Fill. Most applications have determined the number manufacturer with their cubic inch capacity. Where one or more equipment grounding of conductors. The question that then remains Boxes described in table that have a larger conductor(s) enter(s) a box, a single volume is the smallest (minimum) size box that is cubic inch capacity than is designated in the allow-ance in accordance with Table 314.16B permitted. The rules of Article 314.16 are to be table shall be permitted to have their cubic shall be made based on the largest equipment used to determine the Code-recognized limit. inch capacity marked as required by this grounding conductor present in the box. Where section. an additional set of equipment grounding Selection of an outlet or junction box conductors, as permitted by NEC® 314.16(B) for use in an electrical circuit work must take (b) Box Fill Calculations. The volumes (5) are present in the box, an additional into consideration the maximum number of in paragraphs (1) through (5) below, as volume allowance shall be made based on the wires permitted in the box. Safe electrical applicable, shall be added together. No largest equipment grounding conductor in the practice demands that wires not be jammed allowance shall be required for small fittings additional set. into boxes because of the possibility of nicks, such as locknuts and bushings. abrasions or other damage to the insulating (1) Conductor Fill. Each conductor that material, creating the potential for ground originates outside the box and terminates faults or short circuits. or is spliced within the box shall be counted once, and each conductor that passes Article 314 – Boxes and Fittings through the box without splice or termination NEC® 314.16 (A and B) also table shall be counted once. The conductor fill, in 314.16(A). Number of Conductors in cubic inches, shall be computed using Table Outlet, Device, and Junction Boxes, and 314.16(B)(1). A conductor, no part of which Conduit Bodies. leaves the box, shall not be counted. Boxes shall be of sufficient size to provide free Exception: Where an equipment grounding space for all enclosed conductors. In no case conductor or not over four fixture wires smaller shall the volume of the box, as calculated in than #14, or both, enter a box, from a domed (a) below, be less than the fill calculation as fixture or similar canopy and terminate within calculated in (b) below. The minimum volume that box, it shall be permitted to omit these for conduit bodies shall be as calculated in conductors from the calculations. (c) below. (2) Clamp Fill. Where one or more internal The provisions of this section shall not apply cable clamps, whether factory or field supplied, to terminal housings supplied with motors. See are present in the box, a single volume Section 430.12. allowance in accordance with NEC® 314.16(B) Boxes and conduit bodies enclosing (2) shall be made based on the largest conductors, size #4 or larger, shall also comply conductor present in the box. No allowance with the provisions of Section 314-28. shall be required for a cable connector with this clamping mechanism outside the box. (a) Box Volume Calculations. The volume of a wiring enclosure (box) shall be the total volume (3) Support Fittings Fill. Where one or more of the assembled sections, and, where used, fixture studs or hickeys are present in the box, National Electric Code® and NEC® is a registered Trademark of the National Fire Protection Association. www.Hubbell-RTB.com A3 STEEL BOXES, COVERS AND ACCESSORIES GENERAL INFORMation STANDARDS, 2014 NATIONAL ELECTRICAL CODES® MOST OFTEN REQUESTED SectIonS OF THE NATIONAL HOW RACO® PRODUCTS HELP COMPLETE THE ELECTRICAL CODE® INSTALLATION 250.97 Method of Bonding Service Equipment — Bonding This Section is used to ensure that there is ground continuity when Jumpers.