Electrical Flashcards
A _____ _____ is required to disconnnect the house from the grid while a generator is providing electricity to the house.
Transfer switch
A _____ _____ is a device that allows the electric utility company to temporarily disconnect a specific device during peak usage.
Load controller
A _____ _____ _____ is a service and safety device that allows PV arrays to be disconnected from the rest of the system for maintenance.
DC disconnect switch
The _____ _____ _____ is a service and safety device that allows an entire solar electric system to be disconnected from the main service panel.
AC disconnect switch
AC power flows from a solar electric system into the main service panel through a _____ _____ _____, which should be _____ and _____.
Back-fed circuit breaker
Labeled
Secured
PV conductors should be _____ as such where accessible and should not be installed in the same _____ as _____ from other _____ except where connecting to other _____.
Labeled
Conduit/tubing
Conductors
Systems
Systems
Exposed non-current-carrying metal parts of PV systems should be _____.
Bonded/grounded
In newer homes with PV arrays on the roof, there should be at least two _____ in wide pathways on separate roof planes for emergency access, with one being on the _____ side and the arrays should be set back from the roof edge at least _____ in or _____in depending on how much of the roof is covered in arrays.
36
Street
18
36
The blades of a wind turbine should have a minimum vertical clearance of _____ ft above all obstructions within _____ft horizontally.
30
300
Wind turbines are required to have a _____ _____ _____ or _____ _____ installed between the wind turbine system and loads served by the house. The tower should also be connected to a _____ _____.
Surge protective device
Lightning arrester
Grounding electrode
Solar water heating systems should include a _____ _____ _____ to prevent fluids from attaining temperatures higher than _____ degrees F. The system should also include a _____ _____ and _____ _____ when placed in an area where required.
temperature limitation system or temperature/pressure relief valve
180 F
backflow preventer
expansion tank
____ ____ may not be used as a grounding electrode, however it must be bonded to the electrical grounding system.
gas pipe
Homes build prior to the 1920’s may not have had any ____ ____ originally. They may have been retrofitted with ____ ____ ____ wiring and obsolete ____ ____ ____.
electrical service
knob and tube
ceramic distribution panels
In a pool area, electrical components for which safety cannot be ____ due to ____, ____, ____, or other reason require reporting to warn clients of potentially ____ ____.
verified
Inaccessibility, damage, malfunction
hazardous conditions
Pool equipment utilizing a cord to connect to a power source must be plugged into a ____ ____ ____ that uses a ____ ____ device if located less than ___ horizontal feet from a pool wall. No outlets are permitted within ___ feet of a pool wall. Such outlets require ____ protection.
single outlet receptacle
twist lock
10’
6’
GFCI
Maximum cord length for pool equipment is ___ feet. Maximum amperage is ___ amps. Cords should be properly sized, however cords larger than ____ ____ ____ are not permitted.
3’
20 amps
#12 AWG copper
The enclosure for any receptacle used for corded pool equipment must be suitable for ____ ____ and be ____ ____, with or without the ____ ____ ____.
wet locations
weather protected
cord in place
Portable spas and hot tubs may not use a cord greater than ___ feet in length.
15’
Service receptacles may not be installed less than ___ feet horizontally from pool walls and no less than ___ feet from walls of spas and hot tubs.
6’
5’
At least one ____ protected convenience receptacle must be installed within ___ and ___ feet from a swimming pool wall. The receptacle must be installed no higher than ___ feet above grade or deck.
GFCI
6’ and 20’
6’6”
Equipment serving pools, spas, and hot tubs shall have a ____ ____ which is ____ ____ and no less than ___ feet horizontally from the pool, spa, or hot tub.
disconnecting means
readily accessible
5’
No ____ or ____ may be installed over the water or in an area extending less than ___ feet horizontally from a pool wall, unless it is ___ feet or higher above the water.
lighting or fans
5’
12’
In pool areas, all electrical switches must be at least ___ feet horizontally from pool walls, except ____ ____ devices that activate ____ ____. Electrical junction boxes must be at least ___ inches above highest possible water level, no less than ___ inches above deck, and no closer than ___ feet horizontally from pool walls.
5’
pneumatic switching
remote switches
8”
4”
4’
Power lines within ___ feet horizontally of pool walls or edge of any diving board or platform must be at least ___ feet above the water level or base of the diving board or platform. Lines within ___ feet horizontally of a diving board or platform must be a minimum of ___ feet above highest standing area of the board or platform.
10’
22’6”
10’
14’6”
Lighting fixtures within ___ and ___ feet horizontally from a pool wall require ____ protection if less than ___ feet above maximum water level.
5’ and 10’
GFCI
5’
All pool electrical components require ____ protection.
GFCI
All 240v pool equipment must be ____ and require a ____ circuit. Pool heaters, pumps, and blowers in excess of ____ hp require a ____ ____ within ___ feet of the equipment on the same wall and within a direct ____ ____ ____.
grounded
dedicated
1/8 hp
service disconnect
50’
line of sight
A copper wire of at least ___ ___ must connect the ____ ____ within the ____ ____ and deck with the wet niche fixtures of underwater lighting, slides, diving boards, ladders, pumps, equipment, and any other exposed metal apparatus within ___ feet of pool walls.
8 AWG
structural rebar
pool structure
5’
Yummy
The size of a fuse and the rating of the ____ should be the same.
wire
It takes less than ___ amp(s) to cause serious bodily injury or death.
1
___ fuses have a special base that screws permanently into a fuse panel and permits only the correct size fuse to fit.
S-type fuses
___ fuses have a time delay that allows over current to flow through it for a short period.
D-type fuses
___ fuses are heat sensitive and normally open at temperatures between 200-300° C, whereas standard ____ fuses usually melt at temperatures greater than 700° C.
P-type fuses
A-code fuses
Hydro-massage or whirlpool tubs must be ____ and ____ in order to inspect them. Timers or other electrically operated switches must be a at least ___ feet from the tub deck. All equipment serving the tub must be ____ protected and the pump motor should have an ____ ____.
filled and operated
5’
GFCI
access panel
