Technical Info


  • Acrylic & Polycarbonate Compatibility

  • Packaging and Shipping

    Williams’ commitment to quality doesn’t end when a fixture comes off the line. Proper packaging and shipping are critical parts of our quality process. That’s why every fixture we ship is wrapped with the Williams name proudly displayed on every carton and corner board.

  • Fixture Maintenance

    Cleaning, lamping/relamping, and ballast maintenance.

  • Ratings and Certifications

    Guides for ingress protection (IP) ratings; impact protection (IK) ratings; NSF certifications for non-food, splash, and food zones; NEMA Type 4X, ISO clean room standards, and electromagnetic compatibility (EMC) qualifications.

  • The Difference Between Dry, Wet, and Damp Locations

    (NEC) National Electric Code and UL Standard 1598 definitions. National Electric Code Article 410 - Luminaires in Specific Locations

  • Lamp & Ballast Warranty Contact Information

    Lamps and ballasts are warrantied by their respective manufacturers, not H.E. Williams, Inc. To replace defective lamps and ballasts, please contact the lamp or ballast manufacturer.

Drivers & Ballasts


  • Power Entry

    Cord for suspended product ordering info and details with cord entry diagrams. Flexible whip options: all Williams recessed troffers are available with a flexible metallic wiring harness, factory attached and hard-wired to the luminaire. 

  • Tandem In-Line Wiring & Master/Satellite System

    Factory installed branch circuit wiring with nylon self-locking polarized connectors. Master/satellite provides inboard/outboard wiring with 9’ or 11’ flexible whip options.

  • Electrical Accessories

    Cord and plug: 6’ with 120V (6CPI/5-15P) or 277V (6CPI/7-15P). Fuse: fast (GLR) or slow (GMF) blow. Ballast suppressor.

  • Quick Connect Wiring

    Designed specifically to save labor installation costs, the quick connect option utilizes a molded nylon self-locking polarized connector with factory-installed branch circuit wiring. Fixtures simply plug together, and the possibility of cross-wiring is eliminated.


  • Mounting Systems for Suspended Fixtures

    Microstem and canopy (MSF or MSJ) or aircraft cable (ACF or ACJ) suspended mounting option details. Junction box cable mounting installation instructions.

  • Suspended - Aircraft Cable Installation

  • Mounting Systems for Recessed Troffers & Gasketing

    Gasketing options: double and triple with open-cell foam or closed-cell PVC.

    Ceiling types: grid (NEMA Type “G”), slot grid (NEMA Type “SS”), drywall (NEMA Type “F”), and specialty ceiling tees: narrow-faced grid (NEMA NFG), Narrow-faced slotted grid (NEMA “NFSG”), Z spline (NEMA “Z”).

    EQCLIPS: combination earthquake and N.E.C. T-bar clip secures luminaire to T-bar and prevents T-system separation.

  • Mounting Systems for Surface, Strip, Wrap and Industrial Fixtures

    Single stem and canopy (SS), Swivel stem and canopy (SWS), ceiling spacer (320/325), surface mount hanger (SHS, SH1), tong hanger (T2), double stem and canopy (DS), T-bar (GAT) fastener for ceiling spacers, cable suspension kits (GC2), and VBY hangers.

  • Stem & Canopy Installation

    Instruction sheet for single stem and canopy (SS) and swivel stem and canopy (SWS)


Options & Accessories

  • Industrial, Strip & Wrap Accessories

    Metal Louvers, metal frame with lens, row aligner, reflector end plates, wireguards.

  • Troffer Doors, Shielding, and Grid Riser

    Troffer door frames include steel, aluminum with flat, regressed or piano hinge, and tamper resistant options.

    Grid Riser decorative trim system elevates the grid troffer 2” above the ceiling plane for a cove or skylight appearance.

    Troffer shielding options include pattern #12, #15, #19 acrylic, polycarbonate and vandal lenses in clear or frosted acrylic. Parabolic louvers are available in ½" & 1" deep white, or silver acrylic and styrene.

  • Special Reflectors - Strips

    Special reflectors transform Williams’ strip luminaires into powerful light managers to maximize installation flexibility.

  • LVC Wall Plate Accessories

    For use in healthcare products specified with Low Voltage Controllers, the LVC Wall Plate provides simple lighting access for healthcare personnel.

  • Aperture Adaptor – Downlights

    Adaptor (goof ring) corrects ceiling cutout errors during remodel downlight installation.