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What is a Public Safety DAS? NFPA, ERRCS and AHJ (Plot Twist, these letters actually mean something...)

You’re not alone if you see all the abbreviations in fire safety and think, “How the h*ll am I supposed to know what that all means?” 

DAS Explained

The amount of NFPA codes is a large number (like large as in over 300…), so we understand it’s hard to keep track of them all! Actually, are you trying to test your knowledge? Take our NFPA Fire Codes quiz and see how you do! 

Anyways, DAS stands for, “Distributed antenna system.” And no, we don’t mean the antenna for your cable TV.

The NFPA requires that “Buildings and structures that cannot support the required level of radio coverage shall be equipped with a radiating cable system or a distributed antenna system (DAS) with FCC-certified signal boosters, or both, or with a system that is otherwise approved, in order to achieve the required adequate radio coverage.” 

There are additional factors of the distributed antenna system that any commercial property owner should consider (based on NFPA standards). This might include:

  • Signal Strength
  • Isolation
  • System Radio Frequencies
  • Frequency Changes
  • Critical Areas
  • Radio Coverage

Another main component of NFPA 72 Section 24.5.2 is non-interference. 

In other words, “no amplification system capable of operating on frequencies or causing interference on frequencies assigned to the jurisdiction by the FCC shall be installed without prior coordination and approval of the authority having jurisdiction,” according to the NFPA. “The building manager/owner shall suspend and correct other equipment installations that degrade the performance of the public safety radio system or public safety radio enhancement system.” 

Let’s Talk ERRCS

So surprise, ERRCS is one in the same as DAS. An Emergency Responder Radio Communication (ERRCS) is crucial to have in commercial buildings. An ERRCS can also be identified as a Public Safety or First Responder DAS. 

It turns out all of the fire protection abbreviations can be interchangeable!

How About AHJ?

AHJ, the last acronym to understand for today’s lesson! AHJ stands for, “Authority Having Jurisdiction.” It can be a common misconception that the local fire marshall is responsible for any updates in fire safety. But this is not the case. Oftentimes there are multiple people or authorities who have jurisdiction and are responsible for a facility’s fire safety standards and practices.

The NFPA has regulations set under Code 70E

“In a commercial or industrial facility, subsequent installation of electrical equipment or modification of the distribution system is often not done under a government permit nor is this inspected by the government AHJ.” 

A good question to keep in mind listed from the NFPA is, “Does your management invite a government AHJ to inspect and approve the installation of a new subpanel, the move of a production line, the retrofit for a breakroom, the extension of a circuit, or the addition of a backup generator in your facility?”

Have more questions about these confusing acronyms? Reach out to VFS Fire & Security Services today! 

What is a Public Safety DAS? NFPA, ERRCS and AHJ (Plot Twist, these letters actually mean something...)

What is a Public Safety DAS? NFPA, ERRCS and AHJ (Plot Twist, these letters actually mean something…)