2 · The Whys & the Standards
Inspection, testing & maintenance – the words we use
The same job can be called different things in BS and NFPA. Getting the words right matters, because your service report is a legal record.
The big three (NFPA calls these "ITM")
| Word | What it means | Example |
|---|---|---|
| Inspection | A visual check that it looks right, is in place and isn't damaged | Monthly look at an extinguisher: is it there, is the seal intact, is the gauge in the green? |
| Test | Operating it to prove it works | Opening a sprinkler test valve to make the alarm bell ring |
| Maintenance | Work to keep it working or to fix it | Replacing a worn hose, recharging an extinguisher |
NFPA 25 groups these together as ITM: Inspection, Testing and Maintenance.
Other words you'll hear every day
| Word | Meaning |
|---|---|
| Commissioning | Checking a new installation works and is set up correctly before it's handed over |
| Competent person BS | Someone with the training, knowledge and experience to do the job properly. BS documents use this a lot. |
| Responsible person BS | Under UK law (FSO), the person in control of the premises, usually the employer. They must make sure maintenance happens. |
| AHJ NFPA | Authority Having Jurisdiction: whoever enforces the code (fire marshal, insurer, sometimes the owner's fire engineer) |
| Owner NFPA | NFPA 25 puts the duty for ITM on the property owner or their designated representative |
| Impairment | Any time a fire system is out of action, whether planned (you isolated it to work on it) or emergency (it broke) |
| Fire watch | A person or patrol watching an area while its fire protection is impaired |
| Defect / deficiency | Something wrong found during ITM. NFPA 25 grades them as critical deficiency, non-critical deficiency or impairment. |
| Condemned | Equipment that is unsafe or beyond repair and must be removed from service |
| Logbook / records | Where every visit, test result and defect is written down. If it isn't recorded, it didn't happen. |
The routine of every service visit
Whatever the equipment, every visit follows the same skeleton:
flowchart TD
A["Arrive & sign in"] --> B["Get permit to work<br/>+ site-specific briefing"]
B --> C{"Will the work take<br/>a system out of action?"}
C -- Yes --> D["Raise impairment notice<br/>tell control room / alarm receiving centre<br/>arrange fire watch if required"]
C -- No --> E
D --> E["Isolate safely<br/>(LOTO where required)"]
E --> F["Inspect · Test · Maintain<br/>to the right standard & CTT"]
F --> G{"Defects found?"}
G -- "Yes" --> H["Make safe · tag it<br/>report immediately if critical"]
G -- "No" --> I
H --> I["Restore system to normal<br/>check all valves/isolations reset"]
I --> J["Cancel impairment<br/>confirm with control room"]
J --> K["Complete records & labels<br/>hand back permit"]Key takeaways
- Inspection = look. Test = operate. Maintenance = fix or keep working.
- BS often says service; NFPA splits it into ITM.
- Every visit: permit → impair → isolate → work → restore → de-impair → record.