Powder extinguishers (blue)
This type of extinguisher can be used on
most classes of fire and achieve a good ‘knock down’ of the fire. They can be used on fires involving electrical equipment but will almost certainly render that equipment useless. Because they do not cool the fire appreciably it can re-ignite. Powder extinguishers can create a loss of visibility and may affect people who have breathing problems and are not generally suitable for confined spaces.