2 cissp ® Official Study Guide Eighth Edition

Temperature
Time
Stage 1: Incipient
Stage 2: Smoke
Stage 3: Flame
Stage 4: Heat
Stage 1: The Incipient Stage
At this stage, there is only air ionization but no smoke.
Stage 2: The Smoke Stage
In Stage 2, smoke is visible from the point of ignition.
Stage 3: The Flame Stage
This is when a flame can be seen with the naked eye.
Stage 4: The Heat Stage
At Stage 4, the fire is considerably further down the timescale to 
the point where there is an intense heat buildup and everything in the area burns.

---

Implement Site and Facility Security Controls 
419
The earlier a fi re is detected, the easier it is to extinguish and the less damage it and its 
suppression medium(s) can cause. 
One of the basics of fi re management is proper personnel awareness training. Everyone 
should be thoroughly familiar with the fi re suppression mechanisms in their facility. 
Everyone should also be familiar with at least two evacuation routes from their primary 
work area and know how to locate evacuation routes elsewhere in the facility. Personnel 
should be trained in the location and use of fi re extinguishers. Other items to include in 
fi re or general emergency-response training include cardiopulmonary resuscitation (CPR), 
emergency shutdown procedures, and a pre-established rendezvous location or safety 
verifi cation mechanism (such as voicemail). 
Most fires in a datacenter are caused by overloaded electrical distribution 
outlets.
 Fire Extinguishers 
There are several types of fi re extinguishers. Understanding what type to use on various 
forms of fi re is essential to effective fi re suppression. If a fi re extinguisher is used improp-
erly or the wrong form of fi re extinguisher is used, the fi re could spread and intensify 
instead of being quenched. Fire extinguishers are to be used only when a fi re is still in the 
incipient stage. Table 10.2 lists the three common types of fi re extinguishers. 
Ta b l e 10 . 2
Fire extinguisher classes