Wheelock MT4-115-S


Mt4 Horn 115Ac Gray

Availability: Estimated 6 Weeks

Condition: New
Brand: Wheelock
Status: Active
SKU: 48981
Manufacturer Part #: MT4-115-S


The Wheelock MT multitone horns and horn strobes offer a choice of eight (8) nationally and internationally recognized alerting sounds: Horn, Bell, March Time Horn, Code-3 Tone, Code-3 Horn, Slow Whoop, Siren or Hi/Lo Tone. The Code-3 Horn and tone patterns are engineered to comply with NFPA/ANSI Temporal Pattern specifications without requiring additional equipment. With MT horns and horn strobes, one alarm appliance meets most of your signaling needs. The MT strobes can be synchronized using the Wheelock DSM Sync Modules, Wheelock Power Supplies or other manufacturers panel incorporating the Wheelock Patented Sync Protocol. The MT’s Code 3 Horn may be synchronized with the same equipment.

The MT Strobes are designed for ADA applications while meeting or exceeding the latest requirements of NFPA 72, ANSI 117.1, UFC and UL Standard 1971 as well as meeting ADA requirements concerning photosensitive epilepsy.

Additional information

Weight 0.36 lbs
Dimensions .76 × 4.06 × 4.06 in





Flush, Surface, Wall






Eaton Corporation

Production Status



  • Approvals include: UL Standard 1971, UL Standard 464, ULC-S525, ULC-S526, California State Fire Marshal (CSFM), and Factory Mutual (FM). See approvals by model in Specifications and Ordering Information
  • Designed to meet or exceed ADA/NFPA/UFC/ANSI Standards and Accessibility Guidelines
  • Complies with OSHA 29, Part 1910. 165
  • Series MT appliances have IN and OUT wiring terminations that accept two #12 to #18 American Wire Gauge (AWG) wires at each terminal. Inputs are polarized for compatibility with standard reverse polarity type supervision
  • One alarm appliance with (8) eight selective signals to provide superior sound penetration for various ambient and wall conditions with two field selectable sound output levels
  • Code-3 Horn and Tone meet ANSI/NFPA temporal pattern for standard emergency evacuation signaling. MT (Version 2) Code 3 Horn may be synchronized with the same equipment as the strobe.
  • Audible and strobe can operate from a single NAC circuit or from separate NAC circuits with any of the (8) eight audible sounds
  • MT Strobe models are available with Wheelock patented MCW Multi-Candela strobes with field selectable candela settings at 15/30/75/110cd strobes. Synchronize using the Wheelock Sync Modules or panels with built-in Wheelock Patented Sync Protocol
  • Selectable input voltage on non-strobe versions. Strobe versions are factory set for either 12 or 24VDC, with regulated voltage range, filtered (DC) and FWR
  • No additional trim-plate required for flush mounting


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Wheelock MT Multitone Horns and Horn Strobes, version 2


Eaton - Data Sheet

Installation Instructions: 120VAC Multitone Appliances MT4-115


Cooper - Installation Instructions

Wheelock Mounting Accessories


Eaton - Data Sheet

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