Type C fire extinguishers deal with electrical fires. They are most likely to be found
around a digital information processing facility or data center.
Type A is for common combustibles
Type B is for liquids (petroleum products and coolants)
Type D is used specifically for fighting flammable metal fires (eg: magnesium). Additionally
Class K fires are caused by cooking oils and fats. They typically burn much hotter than Class B
fires and are extinguished using wet chemical (alkali) fire extinguishers.
To remember the 4 classes of fire and what they are you can think about my first name which is
CLEMENT. See an example of this below:
Class Type
A Common combustible
B Liquid
C Electrical Fire
D Metal Burning
References:
Source: HARRIS, Shon, All-In-One CISSP Certification Exam Guide, McGraw-Hill/Osborne, 2002,
chapter 6: Physical security (page 312).
Underwriters Laboratory's Rating and Testing of Fire Extinguishers (UL 711).
National Fire Protection Association's glossary. http://en.wikipedia.org/wiki/Fire_classes http://en.wikipedia.org/wiki/Fire_extinguisher http://en.wikipedia.org/wiki/Fire_retardant_foam