TRAINING BULLETIN #9 Flashcards
Transmission lines transmit electrical power from substation to substation above ___ volts on poles or metal towers to distribution points.
34,500
Distribution lines are categorized into two types:__voltage (750+ to 34,500 volts) and Secondary or __ voltage (120 to 750 volts). D
primary or high, low
Service lines carry power from the distribution transformers to the customer’s property. Service lines to the residential customer are either ___ volts.
120 or 240
High voltage lines to customer transformers and switching equipment are not ___. Service lines are low voltage.
service lines
(anything below __ volts is considered to be low voltage)
750
Carbon dioxide and dry chemical are ___ extinguishing agents which may be safely used on fires in energized electrical equipment. However, dry chemical should be used only in a ____.
non-conducting, moisture free atmosphere
Until it is not an electrical fire, most often__ is the best and safest tactic.
protecting exposures
a good rule for actual firefighting practices on low voltage fires and easily remembered, is ___ for fog and thirty (30) feet for straight stream application.
six (6) feet
Firefighters ____ any substation unless
cleared to do so by a responsible representative of the power company.
should not enter
Firefighters___ attempt a rescue from electric poles or towers
should never
