Names and spellings
ERCES, ERRCS, BDA and the other names for firefighter radio coverage
Your fire marshal's letter may say ERCES. Your installer's quote may say BDA. Your city's code may say ERRCS or ERCC. They are talking about the same requirement. This page maps the names to the documents that use them.
Why there are so many names
The requirement started as "emergency responder radio coverage" in the International Fire Code. The 2021 edition describes it as "in-building, two-way emergency responder communication coverage" (IFC 2021 510.1). States and cities then adopted the code with their own wording, and installers kept calling the equipment by its main part, the bi-directional amplifier. The result is a pile of acronyms for one thing: making sure firefighters' radios work inside your building.
Who uses which name
| Name | Stands for | Used by | Source |
|---|---|---|---|
| ERCES | Emergency Responder Communications Enhancement System | Washington state fire code; San Francisco Fire Department; Phoenix policy text | WAC 51-54A-0510; SFFD AB 3.04; Phoenix Explanatory Policy |
| ERRCS | Emergency Responder Radio Coverage System | Many fire department guides, including San Diego and Pierce County; San Francisco's former name | SDFD guideline; Pierce County handout; SFFD AB 3.04 |
| ERCC | Emergency Responder Communication Coverage | City of Houston | Houston CE-1350 |
| ERRS | Emergency Responder Radio System | Los Angeles Fire Department Requirement #105 | LAFD Requirement #105 |
| Two-way radio communication enhancement system | (statutory wording) | Florida Statutes | F.S. 633.202(18) |
| BDA system | Bi-directional amplifier system | Installers, owners and many fire departments | LAFD Requirement #105 subtitle |
| Public safety DAS | Distributed antenna system for public safety radio | Installers; FCC rules define DAS | 47 CFR 90.219(a) |
| Signal booster | The amplifier itself | Federal rules and the IFC | 47 CFR 90.219; IFC 2021 510.4.2.4 |
What the name does not change
Whatever your city calls it, the same questions decide what you owe:
- Does your building fall under the local trigger (size, height, basements, occupancy)?
- Does the signal inside already meet the levels your fire department sets?
- If not, who installs, permits, tests and maintains the system?
Start with the building checker, or go to your state or city requirements. The pillar page on BDA systems covers the equipment, and What is ERRCS covers the requirement itself.
Confirm the exact requirement with your fire marshal (AHJ).
Questions people ask
What does ERCES stand for?
Emergency Responder Communications Enhancement System. Washington's fire code amendments and San Francisco's 2025 bulletins use it (WAC 51-54A-0510; SFFD AB 3.04, which notes ERCES was "previously called ERRCS").
Is ERCES different from ERRCS?
Not in what it asks of a building owner. The newer name reflects that the requirement is about communications, not only voice radio. The obligations still come from the fire code section your jurisdiction adopted, usually Section 510.
Sources
Primary documents we read for this page. Rules change; confirm with your fire marshal (AHJ).
- International Fire Code 2021, Section 510 (text as published by the City of Eaton), City of Eaton, reproducing the ICC International Fire Code
- WAC 51-54A-0510, Emergency responder communication coverage, Washington State Legislature
- Administrative Bulletin 3.04, ERCES Certification (2025), San Francisco Fire Department
- Emergency Responder Communication Coverage (ERCC) Guideline, Form CE-1350 (revised July 2025), City of Houston
- Requirement, Los Angeles Fire Department
- Florida Statutes 2026, section 633.202, subsection (18), The Florida Senate
- 47 CFR 90.219, Use of signal boosters, Electronic Code of Federal Regulations
- Fire Prevention Section Explanatory Policy Manual 2026, Emergency Responder Radio Coverage (effective January 1, 2026), City of Phoenix Fire Department
Related
What is ERRCS?
ERRCS means in-building radio coverage for firefighters and police. Why fire codes require it, who sets the rules, who pays, and what owners must do.
BDA systems for firefighter radio coverage
What a BDA (bi-directional amplifier) system is, the parts it needs, the FCC and fire code rules it must meet, and how owners find their local requirements.
Public safety DAS, BDA and cellular DAS
How a public safety DAS relates to a BDA, why it is not the same as a cellular DAS, and the federal and local rules on sharing equipment between them.