// Escape Room Prop — Industrial Series

Fuse Panel
Puzzle - FC4

Players repair a damaged electrical cabinet, intentionally violate a safety warning, then discover the power system has been wired in reverse. A built-in arc flash effect on the broken fuse holder makes players flinch before they even touch it. Every action produces live visual feedback, ending with a satisfying relay activation. A five-step electrical puzzle built into a metal cabinet. Designed and manufactured by Ediseja 21, a company with over 16 years of experience in designing and producing professional electronic systems.

PHASE ERROR
REVERSE SEQUENCE TO SOLVE
5-step puzzle Relay output LED phase feedback Red warning indicator Flashing arc Industrial aesthetic
FC4-Fuse Panel Puzzle front face, showing System I and II phase LEDs and the phase sequence warning light
Front face — phase indicator panel
FC4-Fuse Panel Puzzle cabinet open, showing fuse holder chamber on the left and wiring panel on the right
Cabinet open — fuse chamber and wiring panel side by side
// How players experience it
01
Search & Find

Players locate electric cabinet key, two fuses and one LED indicator hidden elsewhere in the room. The cabinet sits waiting — clearly unfinished.

FC4-Fuse Panel Puzzle Front side at start FC4-Fuse Panel Puzzle Inside at start FC4-Fuse Panel Puzzle Connect the cable wires
02
Install Components

Fuses slot into the two empty holders inside the cabinet. Tactile, satisfying. LED indicator installed into empty hole on cabinet door. Two holders accept fuses. One hole takes the LED indicator.

FC4-Fuse Panel Puzzle Close-up of the two NH00 fuse holders, ready to accept fuses
03
Wire Correctly

Three correct wires out of five must connect to the fuse holders. LED indicators light up to confirm correct connections in real time. One broken holder/fuse randomly flashes and crackles — arc light and spark sound.

FC4-Fuse Panel Puzzle Close-up of the fuse holder where the arc flash effect fires
04
Break the Rules

Players see broken fuse before they read the label: "Warning: bridging a broken fuse with wire is strictly forbidden... unless absolutely necessary." The emergency wire is right there inside the cabinet. Operates entirely on low-voltage electronics.

FC4-Fuse Panel Puzzle Close-up of the bridged fuse holder with wire
05
Reverse the Phase

Phase LEDs sequence L3 → L2 → L1 with red indicator lit — something is wrong. The hint: "swap any two wires." Correct sequence: L1 → L2 → L3. Red extinguishes. Relay closes. Done.

FC4-Fuse Panel Puzzle LED sequence FC4-Fuse Panel Puzzle Hint inside of the door FC4-Fuse Panel Puzzle Phase sequence LED panel showing the L1, L2, L3 indicators and the red phase-error light
// System
😆

The forbidden wire moment

Players bridge the broken holder using the wire the label says is forbidden. After the arc effect, they understand exactly why.

⚡

Arc flash effect — the startle moment

The broken fuse holder randomly flashes and crackles. Players flinch, laugh, and than immediately understanding why that holder needs bypassing. Operates entirely on low-voltage electronics.

🔴

Visual feedback at every step

LED indicators guide players through wiring and phase sequence without a single GM hint. The prop teaches itself.

🔄

Fast reset — under a minute

Remove the bridge wire, LED module and two fuses. Cycle power. Ready for the next group.

🔌

Relay output — plug and play

Dry contact NO/NC relay, 12 V enable input system. No custom wiring needed.

🏭

Fits any industrial theme

Metal cabinet, real fuse holders, real wire. Looks at home in sci-fi, bunker, power plant, or laboratory rooms — no decoration required.

🛡️

Built for daily use

Industrial-grade metal enclosure. Robust fuse holders. 12-month warranty. Designed to run multiple sessions a day, year-round.

// Inside the cabinet
FC4-Fuse Panel Puzzle Annotated interior of the cabinet showing fuse holders, bridge wire, LEDs, relay, and wiring
1
3
4
2
5
1

Fuse holders

3× NH00 holders — 2 functional, 1 intentionally broken.

2

LEDs

Panel-mount phase and warning indicators, wired through to the front face.

3

Bridge wire

The "forbidden" jumper players use to bypass the broken holder.

4

Relay

Dry-contact output module, fires when the puzzle is solved.

5

Wiring

The 5-wire loom players cross-connect during Step 3.

// Technical specifications
Power supply9 - 12 V DC (adapter included)
OutputRelay — dry contact NO / NC
Relay rating5 A / 12 V AC/DC
ResetPower cycle, under a minute
Arc flash effect Simulated electrical arc with synchronized flash and sound · Operates entirely on low-voltage electronics
Phase indicatorsGreen L1, L2, L3 LED + red warning LED
Fuse holders3× NH00 — 2 functional, 1 intentionally non-functional with arc flash effect
Wire connections5 wires, 3 correct connections required
EnclosureMetal cabinet, industrial finish
Approximate dimensions400 × 300 × 200 mm
Approximate weight4.5 kg
Compatible themesSci-fi · Bunker · Power plant · Laboratory · Horror
Warranty12 months
Lead time3–4 weeks · Ships worldwide
// Pricing
949 €
excl. VAT + shipping
Complete prop, ready to install. Everything you need to run the puzzle from day one.
  • Metal cabinet enclosure
  • Full electronics panel
  • Arc flash effect
  • Relay output (NO/NC)
  • 12V power adapter
  • Installation & reset instructions
  • Fuses (set of 3)
  • LED indicators (set of 3 for phases + 1 for error)

Bring industrial realism to your next escape room.

Lead time 3–4 weeks. Ships worldwide. Custom orders and theming available on request.

Request a quote
// Contact

Company: Ediseja 21 d.o.o.

Address: Stegne 21C

City: 1000 Ljubljana

Country: Slovenia - EU

E-mail: grega.flander@ediseja21.com

// Gallery
FC4-Fuse Panel Puzzle Front cabinet open, fuse chamber and wiring panel
Cabinet, front, unfinished
FC4-Fuse Panel Puzzle Full cabinet open, fuse chamber and wiring panel
Cabinet, open, unfinished
FC4-Fuse Panel Puzzle Front face of the cabinet with phase LEDs
Front face, finished
FC4-Fuse Panel Puzzle Inside the fuse chamber, holders and bridge wire
Fuse chamber detail