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586-765-0770Michigan law requires reliable in-building radio coverage for first responders. We help facility managers, city officials, and building owners get compliant — and stay that way.
Answer 6 quick questions. We’ll tell you if ERCES is likely required, what testing you need, and your next step.
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Select the category that best describes your building’s primary use.
ERCES thresholds vary by jurisdiction — size is a primary trigger in most codes.
Dense materials significantly block radio signals and increase ERCES likelihood.
Basements, parking structures, and tall buildings are common ERCES trigger points.
Even if ERCES isn’t code-triggered, known dead zones create liability and safety risk.
New construction and major renovations have specific code trigger points.
Michigan follows IFC Section 510 and NFPA 1225. Most large or dense buildings, new construction, and existing facilities with known coverage gaps are required to have a functioning system.
Steel and concrete structures block signals. Manufacturing plants are high-priority ERCES buildings in Michigan.
Educational buildings require reliable first responder communications throughout all floors and wings.
Healthcare facilities require 99% critical area coverage. EMT and fire response depends on it.
City halls, courthouses, and government facilities are subject to ERCES under state and local codes.
High-traffic public infrastructure with complex radio environments. AHJ requirements are stringent.
Underground and enclosed garages are near-universal ERCES triggers due to dense shielding.
High-occupancy residential and hospitality buildings in Michigan require in-building coverage per local AHJ.
Water treatment plants, substations, and remote utility facilities need first responder radio access.
Under the Michigan MPSCS compliance framework, the correct workflow is: test the RF environment first, document the results, then design a system only if the building fails coverage requirements. TCG provides professional pre-design RF surveys that protect both the building owner and the compliance record. Schedule a free consultation →
ERCES compliance is governed by federal, national, and state-level codes. Your Authority Having Jurisdiction (AHJ) — typically the local fire marshal — enforces these at the building level.
The primary model code governing ERCES in new and existing buildings. Requires 95% general coverage and 99% critical area coverage. Mandates UL 2524-listed equipment, standby power, annual testing, and fire alarm interface.
The 2022 NFPA 1225 standard consolidates NFPA 1221 and NFPA 1061 into one comprehensive ERCES document covering design, installation, testing, and maintenance. All components must be UL 2524 listed.
The 2025 edition clarifies how ERCES must be supervised, monitored, and interconnected with fire alarm systems. Expands lifecycle responsibilities for building owners.
FCC rules require any non-licensee operating a signal booster to obtain express consent from the frequency licensee, maintain consent records, and operate on a non-interference basis. Installer must hold an FCC General Radio Operator license.
Michigan’s statewide 800/700 MHz digital trunked radio network — 355+ towers, 155,000+ radios. ERCES systems in Michigan must be coordinated with MPSCS for frequency consent before installation. TCG manages this coordination for all clients.
All ERCES amplifiers must be UL 2524 listed — the certification verifying performance in emergency scenarios. The Nextivity SHIELD product line (installed by TCG) carries full UL 2524 listing and all required monitoring and alarming functions.
Signal must be achieved in 95% of all areas on each floor and 99% of critical areas (stairwells, elevator shafts, command centers). Minimum inbound signal level: -95 dBm. Systems must meet DAQ and SINR thresholds. Annual testing and documentation is required to maintain compliance.
TCG packages ERCES as a complete Michigan Public Safety Radio Coverage Compliance Program — not just equipment installation. We guide you through every step, from initial survey to annual recertification.
TCG is an authorized installer of Nextivity’s CEL-FI SHIELD product line — the industry’s most advanced, all-digital public safety ERCES solutions. All products are UL 2524 listed and FirstNet-ready.
A complete 0.5-watt integrated BDA for LMR 700/800 MHz. Award-winning signal processing and end-to-end remote monitoring — the most advanced low-power ERCES solution available.
Ideal for: Schools, mid-size offices, government buildings, hotels
The only ERCES solution delivering concurrent LMR coverage and true carrier-grade multi-band FirstNet support. All-digital RFoE over Cat cabling — up to 1,000× stronger than traditional analog BDA systems.
Ideal for: Hospitals, airports, large industrial facilities, high-rise buildings, campuses
As an authorized partner, TCG installs, commissions, and maintains the full Nextivity SHIELD product line across Michigan. All systems include manufacturer warranties, UL 2524 certification, and TCG’s lifetime workmanship guarantee. We handle MPSCS coordination and AHJ submittal documentation as part of every installation.
TCG handles the entire ERCES compliance pathway — from RF survey and MPSCS coordination to installation, acceptance testing, and annual recertification. One call covers everything.