Details Title: 0701 Description: LP 484 Electrical Hazards Total Flash Cards: 21 Created: 09/26/2007 10:45:26		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Other Flashcards
Cards in this set: Term Street lights can be up to ? Definition 4800 V Term What voltage can be carried through High Voltage Conductors? Definition 34,500 V Term High Voltage Signs on cross arms indicate conductors with more than ____ Volts? Definition 750 Term What act as circuit breakers in high-voltage circuits? Definition Fuse or Cutouts Term How many different configurations of wires may be found for service conductors? Definition 3 twisted around each other known as a Triplex Term Are street lights energized during daytime hours? Definition Normally there is no current flowing in the daytime. Term What is unusual about the position of the street light on power polls? Definition wires may be located on lower cross arms. Term Low Voltage conductors sometimes called secondaries carry ______________ volts? Definition 240 or 480 Term Transformers reduce high voltage to lower voltage, usually ____ to ________? Definition 120 to 480 Volts Term High Voltage insulatros may be used to handle up to _________ volts? Definition 66,000 Term Usually used to isolate defective service area and is to be operated by power company patrolman only? Definition Line Sectionalizing Switch Term Controls the voltage to transformers bank below and is operated by the POWER COMPANY poatrolman. Definition Rack Switch Term High Line Hand switches carry up to 34,500 volts. When may firefighters operate them? Definition NEVER!!! Term When wires are down you must Notify OCDS and give the correct address and brief description, indicate ________? Definition Pole to Pole or House to Pole Term What wires may be cut by firefighter? Definition low voltage wires 750 volts or less Term When cutting wire use a mechanical axe and rubber gauntlet gloves. The gloves are test to ______ every ______ days by DWP. WHo are they exchanged with? Definition 10,000V 60 days BN Staff Assistant Term Do not cut Triplex cables unless? Definition They are seperated and cut individually Term What are transmission lines used for? Definition To carry high volatge electricity Term What is the purpose of a distribution station? Definition These stations take power from transmission lines and reduce the voltage for use in the ditribution line. Term The main fire hazard within the underground vaults lies in the colling oil used in the transformers which has a flash point below ? Definition 300 deg Term Can you use water to put out a fire in an underground vault? Definition never put water into a vault. Use only nonconducting extinguishers and only when requested to do so by DWP