1910.164: Fire Detection Systems
Employers must make sure automatic fire detection systems required by OSHA are approved for their purpose, kept operable, and restored promptly after each test or alarm, with spare parts available. Systems must be tested and adjusted as needed, serviced by a trained person, cleaned when needed, and supervised if pneumatic or hydraulic and installed after January 1, 1981.
Key takeaways
- 1910.164 is part of OSHA's general industry standards (29 CFR Part 1910, Subpart L).
- OSHA cited it 16 times in the last 3 years, in 16 inspections, with $33,472 in current penalties.
- Most citations: VI (3), AZ (2), RI (2).
- Most-cited part: 1910.164(c) Maintenance and testing (11 citations).
- Free 5-minute toolbox talk for your crew below.
Get the free 5-minute toolbox talk on 1910.164 ↓
In this article
What this rule covers
29 CFR 1910.164, "Fire detection systems", is an OSHA general industry standard (Part 1910, Subpart L). It has 19 numbered paragraphs. The official text below is copied word for word from the Electronic Code of Federal Regulations (eCFR). The numbers, injury cases and training on this page show how OSHA enforces it on real job sites.
Official text
Show the full text of 1910.164 (19 paragraphs)
(a) Scope and application. This section applies to all automatic fire detection systems installed to meet the requirements of a particular OSHA standard.
(b) Installation and restoration. 4 citations
(1) The employer shall assure that all devices and equipment constructed and installed to comply with this standard are approved for the purpose for which they are intended. 1 citations
(2) The employer shall restore all fire detection systems and components to normal operating condition as promptly as possible after each test or alarm. Spare detection devices and components which are normally destroyed in the process of detecting fires shall be available on the premises or from a local supplier in sufficient quantities and locations for prompt restoration of the system. 3 citations
(c) Maintenance and testing. Open (c) 11 citations
(1) The employer shall maintain all systems in an operable condition except during repairs or maintenance. Open (c)(1) 11 citations
(2) The employer shall assure that fire detectors and fire detection systems are tested and adjusted as often as needed to maintain proper reliability and operating condition except that factory calibrated detectors need not be adjusted after installation.
(3) The employer shall assure that pneumatic and hydraulic operated detection systems installed after January 1, 1981, are equipped with supervised systems.
(4) The employer shall assure that the servicing, maintenance and testing of fire detection systems, including cleaning and necessary sensitivity adjustments are performed by a trained person knowledgeable in the operations and functions of the system.
(5) The employer shall also assure that fire detectors that need to be cleaned of dirt, dust, or other particulates in order to be fully operational are cleaned at regular periodic intervals.
(d) Protection of fire detectors. 1 citations
(1) The employer shall assure that fire detection equipment installed outdoors or in the presence of corrosive atmospheres be protected from corrosion. The employer shall provide a canopy, hood, or other suitable protection for detection equipment requiring protection from the weather. 1 citations
(2) The employer shall locate or otherwise protect detection equipment so that it is protected from mechanical or physical impact which might render it inoperable.
(3) The employer shall assure that detectors are supported independently of their attachment to wires or tubing.
(e) Response time.
(1) The employer shall assure that fire detection systems installed for the purpose of actuating fire extinguishment or suppression systems shall be designed to operate in time to control or extinguish a fire.
(2) The employer shall assure that fire detection systems installed for the purpose of employee alarm and evacuation be designed and installed to provide a warning for emergency action and safe escape of employees.
(3) The employer shall not delay alarms or devices initiated by fire detector actuation for more than 30 seconds unless such delay is necessary for the immediate safety of employees. When such delay is necessary, it shall be addressed in an emergency action plan meeting the requirements of § 1910.38.
(f) Number, location and spacing of detecting devices. The employer shall assure that the number, spacing and location of fire detectors is based upon design data obtained from field experience, or tests, engineering surveys, the manufacturer's recommendations, or a recognized testing laboratory listing.
[45 FR 60713, Sept. 12, 1980]
Source: eCFR, text current as of 2026-10-15.
Export the list: 16 inspections cited 1910.164 in the last 3 years, with employer, location, penalty and date.
Purple Belt, $59/moWhere and how often it was cited
| Year | Citations |
|---|---|
| 2024 | 7 |
| 2025 | 5 |
| 2026 | 4 |
Top states: VI (3), AZ (2), RI (2), IN (2), CO (1)
Largest penalties
| Employer | Location | Penalty for this rule |
|---|---|---|
| U. S. POSTAL SERVICE - TRUJILLO ALTO STATION | TRUJILLO ALTO, PR | $16,552 |
| JBM SHERMAN CARMEL, INC. | BENNINGTON, VT | $3,641 |
| LDRV HOLDINGS CORPORATION | JOHNSTOWN, CO | $3,526 |
| AUDUBON DEPARTMENT OF PUBLIC WORKS | AUDUBON, NJ | $2,800 |
| U.S. POSTAL SERVICE | CAPITOL HEIGHTS, MD | $2,500 |
Free toolbox talk
A 5-minute crew talk on 1910.164, plus alerts when this rule changes. Free.
OSHA interpretation letters
None exist. OSHA has not published a letter of interpretation for 1910.164.
Most-cited parts of this rule
- 1910.164(c) Maintenance and testing 11 citations
- 1910.164(c)(1) 11 citations
Get your crew competent
Trainers on Black Belt Safety: Marc Harvey
Trainers and suppliers: feature your business on this rule for $25/month.
Frequently asked questions
What must happen after a fire detection test or alarm?
The system must be restored to normal operating condition as promptly as possible.
Who may service fire detection systems?
A trained person knowledgeable in the operations and functions of the system.
Do factory calibrated detectors need adjusting?
No. Factory calibrated detectors need not be adjusted after installation.
About this page
Sources
- 29 CFR 1910.164 (eCFR), text current as of 2026-10-15
- U.S. Department of Labor enforcement data: OSHA inspections, citations and accident records, copied nightly; data as of 2026-11-06
3-year window. Federal OSHA only; state-plan rules are not counted. Plain-language text is a summary, not legal advice; the official text controls. Black Belt Safety is not part of OSHA or the Department of Labor.