The T2 Solutions Fire Alarm Safety Isolator Switch (Red) is a BS5839-1 compliant mains safety isolation switch designed specifically for use with fire alarm systems. It provides a secure, tamper-resistant method of isolating the 230V AC mains supply to fire control and indicating equipment (CIE) — and is equally suitable for security systems, access control panels, and other indicating equipment requiring a dedicated mains isolation point.

By switching both Live and Neutral simultaneously via a double-pole mechanism, it ensures full mains isolation during maintenance, testing, or emergency situations. Access is restricted to authorised personnel only through a key-operated lock switch, with the key removable in both the ON and OFF positions to prevent unauthorised re-energisation.

Key Highlights

• BS5839-1 Compliant — Meets the requirements of British Standard BS5839 Part 1 for fire detection and alarm systems in buildings
• Double Pole Switching — Isolates both Live and Neutral simultaneously for complete and safe mains disconnection
• Key-Operated Lock Switch — Restricts operation to authorised personnel only; key is removable in both ON and OFF positions
• Internal Fuse Included — Built-in fuse eliminates the need for a separate external fuse; the fuse cannot be removed without removing the cover, preventing tampering
• Neon Indicator — Illuminated neon lamp confirms mains power is present at the switched output at a glance
• Switch Rating: 4A @ 250V AC — Suitable for fire alarm control panels and associated equipment
• “Fire Alarm — Do Not Switch Off” Labelling — Clearly marked faceplate prevents accidental or unauthorised isolation by non-authorised personnel
• Red Faceplate — Highly visible red finish ensures the unit is immediately identifiable as fire alarm equipment in plant rooms, meter cupboards, and riser cupboards
• Single Gang UK Format — Standard UK single gang footprint; supplied complete with a matching surface back box for straightforward installation
• Supplied with 2 Keys — Two keys included for initial commissioning and key storage

Where It’s Required

British Standard BS5839-1 requires that the mains supply to a fire alarm control panel is provided with a means of isolation that can only be operated by a key or special tool, and is clearly labelled “Fire Alarm — Do Not Switch Off”. This isolator fulfils that requirement and should be installed adjacent to the fire alarm control panel at every new installation or upgrade.

What’s in the Box

• Red isolator switch faceplate with integral keyswitch and neon indicator
• Matching red surface back box
• 2× keys
• Fixing screws