Ch. 8 Flashcards
(40 cards)
How is engergy catagorized
Stable
Unstable
How is the integrity of energy catagorized
Grounded
Insulated
Protected
What path does electricity follow
Least resistance
What electricity has established a path to ground
Ground gradient
How many feet does down power line create a concentric ring
Up to 30
What is a safe distance from downed powerlines
10ft
What is the ignition temp of transformer oil
400
Below what temp should transformers be cooled too
400
What is the size range of blades on a wind turbine
60-130ft
What is the size of the rotational zone
300ft
What is an electrical grid typically designed to feed
Buildings
Where are Romex runs typically located
Behind walls, ceilings, floors
Where is the power supply shut off to a building
At the main
What items does an UPS systems include
Generators
Batteries
Solar
Where are UPS rooms common place
Data storage
Telecommunications
What power do generators produce
DC
What 2 ways are solor systems used
Electrical Generation
Thermal Heating
How many lbs per sq ft do PV panels add
3-5
What are solor systems designed to do
Heat a liquid
How many lbs per sq ft do solor panels add
5-8
How can PV be distinguished from solar panels
Piping attached to panel
What are the most common gas utilities
Natural gas
Propane
What do pressurized systems use to achieve power
Hydraulics
Pneumatics
Bright orange cables indicate up to how many volts
700
