Edge‑Lit Exit Sign Mounting & Wiring — Ceiling, End/Flag, Wall/Back

Before You Start: Safety, Tools & Pre‑Checks

• Safety: Lockout/tagout the circuit. Use PPE (gloves, eye protection).
• Tools: level, screwdriver set, drill/anchors, wire strippers, voltage tester, and ladder/lift.
• Docs: Read the model’s installation sheet. Confirm listing (UL 924) and environment rating (dry/damp/wet).
• Location: Confirm sightlines, face count, and mounting orientation. If you’re unsure, see Single‑ vs Double‑Face planning.
• Power: Provide an unswitched 120/277 VAC branch circuit as required by code and the product label.

For the broader ecosystem (color choice, code overview, feature options), start with the Edge‑Lit Exit Signs — Buyers Guide.

Mounting Types & When to Use Them

• Ceiling mount: Centers the legend on the corridor centerline—good for two‑way travel and long runs.
• End/flag mount: Projects perpendicular from a wall—ideal at T‑intersections or when perpendicular visibility is critical.
• Wall/back mount: Keeps a low profile; best where travel is one direction along the wall.

Ceiling Mount — Step by Step

1. De‑energize and verify the feed is off.
2. Mark the centerline; attach the universal canopy plate to a junction box or blocking.
3. Make conductors accessible; follow the label for connections (120/277 VAC) and grounding.
4. Attach the housing; hang the panel and level the assembly.
5. Apply chevrons after verifying egress direction; tighten hardware and secure strain relief.

End/Flag Mount — Step by Step

1. De‑energize; confirm wall structure or blocking at the mounting height.
2. Anchor the canopy to the wall plate; check plumb/level to avoid panel tilt.
3. Make splices per label; maintain conductor support within the box.
4. Set the panel to project perpendicular; verify visibility from both approaches.
5. Apply chevrons and run a quick functional test.

Wall/Back Mount — Step by Step

1. De‑energize; locate a compliant junction box at the sign location.
2. Secure the backplate to the box; ensure the housing will sit flush and level.
3. Make splices per label/local code; route conductors to avoid pinching.
4. Attach housing; hang/level the panel; check for glare from nearby luminaires.
5. Apply chevrons; perform a 30‑second functional test.

Recessed Notes (Trim & Access)

If the design calls for recessed trims (grid, flanged, or mud‑in), coordinate with the ceiling contractor for clearances and service access to the test switch/indicator. For full details on trim choices, wiring access, and 8″ letter scenarios, see Recessed Edge‑Lit — Ceiling Trim & 8″ Letters.

Wiring Basics (120/277 VAC, Battery)

• Input: Most edge‑lit signs accept 120/277 VAC. Follow the product label for conductors and torque values.
• Battery: 90‑minute minimum emergency operation. Many models offer self‑test with visual indicators.
• Circuiting: Provide an unswitched branch circuit so the sign stays energized for charging and emergency transfer.
• Grounding: Bond per code and manufacturer instructions.
• Cable/Conduit: Use plenum‑rated materials where required; support conductors and protect against abrasion.

Chevron (Arrow) Application

Apply chevrons only after verifying the final egress path and door swing with the GC or facility team. For double‑face units, confirm both legends point correctly. Dry‑fit and level the panel before applying the arrow stickers or inserts.

• Mockup: Stand in the approach path and confirm direction visually.
• Documentation: Note arrow directions in submittals to prevent rework.

Testing, Commissioning & Documentation

• Initial test: Press the push‑to‑test button; verify legend illumination and transfer to battery.
• 30‑second check: Required monthly in many jurisdictions. Record the result.
• 90‑minute test: Required annually for UL 924 systems; record the result and correct any failures.
• Self‑test: If available, verify indicator status and retain automated logs as allowed by your AHJ.

If you’re still deciding on letter color, see Red vs Green Letters for Edge‑Lit Exit Signs.

Common Issues & Fixes

• Panel not level: Loosen and square the canopy/backplate; re‑tighten evenly.
• No illumination on test: Re‑check unswitched feed and polarity; verify battery connector is seated.
• Legend washout/glare: Adjust mounting height/angle; avoid strong downlight hotspots.
• Wrong arrow direction: Remove/replace per manufacturer instructions; confirm path before re‑apply.
• Inaccessible test switch: Relocate the J‑box or specify a remote test switch if permitted by AHJ.

Still comparing families for the application? Review the quick matrix: Edge‑Lit vs Photoluminescent vs Thermoplastic.

Mini AHJ Checklist

• Listing & rating: UL 924; dry/damp/wet as required.
• Power: Unswitched 120/277 VAC branch circuit provided.
• Battery: 90‑minute minimum; test plan documented (monthly/annual).
• Mounting: Ceiling/end/wall chosen for sightlines and access to indicators.
• Face count & arrows: Single/double verified; chevrons applied to match final egress path.
• Lettering: 6″ typical; verify if 8″ applies.

FAQ