NHIE Home Inspector Manual: Electrical
System Study Exam Questions with
Answers
1) What are 2 out of doors receptacle necessities? - ANS-Outdoor receptacles:
1) At least one GFCI included receptacle placed inside 78-in vertically from deck, balcony, or
porch
2) Receptacle available from outdoor
Are home inspectors required to check three & 4-manner switches? - ANS-Yes, inspectors are
required to test these switches from each switch and with exclusive transfer orientations.
Are Inspectors required to look into GFCIs? - ANS-While they're now not required to through
SOP, many do using either a tester or a trying out device.
- WA State requires testing all GFCIs.
Armored cable -- Describe its length of use, description, application, EGC acceptability? - ANS--
Period of use: From early 1900s to modern-day
- Description: insulate conductors in flexible interlocking steel protecting; can be clean or
corrugated, conductors wrapped in paper
- Application: Dry places no longer uncovered to moisture
- EGC acceptability: Yes, after 1959
Can & have to home inspectors check alarms (e.G., hearth or carbon monoxide)? - ANS-Home
inspectors:
- Test hearth & carbon monoxide detectors
- Test w/warning
- Button checks sound feature
- Button does no longer indicate alarm feature well
Note:
- Explain difficulty in record
Can exposed incandescent bulbs be positioned in garments closet? - ANS-Nope
,Define knob and tube and whilst it became used. - ANS-Knob and tube gets its name from the
ceramic insulators used to guide the conductors and from the ceramic tubes used to shield the
conducted when they ran via the framing contributors. Knob and tube become used from the
early 1900s to the Nineteen Thirties. It is taken into consideration out of date; but, it may be set
up nowadays as an extension of present knob and tube with permission from the nearby
constructing branch.
Define Service Equipment (e.G., essential close off) - ANS-Service device is the method to
disconnect all strength to the house. Service gadget may be circuit breakers, fuses, or switches.
Important:
- Disconnecting carrier gadget need to now not require running or pulling no extra than 6 circuit
breakers, fuse blocks, and switches in any combination.
- The carrier device must be classified to signify characteristic.
Do big equipment need disconnects? - ANS-Yes, huge appliances (HVAC, AC, and so forth.)
need to have a means to disconnect energy for protection and serviceability. The fuse or circuit
beaker is appropriate if in sight of appliance; a separate disconnect must be set up if now not.
During what duration wherein fuse-fashion OPDs hooked up in panelboards? - ANS--
Commonplace from Nineteen Forties to late Nineteen Sixties
Note:
- Usually panelboards the usage of fuses are beyond carrier lifestyles
Electrical steel tubing -- Describe its length of use, description, application, EGC acceptability? -
ANS-- Period of use: N/A
- Purpose: designed for routing and protesting conductors and cables
- Construction: Usually fabricated from PVC; ranges from half to 2 in diameter
- Application: Used in maximum locations; besides the ones exposed to physical damage; might
not be barried; may be imbedded in concrete; help every 3 ft from packing containers and
terminations; shield w/nail gaurds
- EGC acceptability: No
Electrical non-metallic tubing (EMT, AKA "thin wall") -- Describe its duration of use, description,
utility, EGC acceptability? - ANS-- Period of use: N/A
- Purpose: designed for routing and protesting conductors and cables
- Construction: spherical pipe made of steel or aluminum; levels from half of in to four in
- Application: maximum place besides situation to bodily damage, authorised type can be
barried and imbedded in concrete
- EGC acceptability: Yes, when appropriate fittings are used
Flexible steel conduit (FMC) -- Describe its duration of use, description, software, EGC
acceptability? - ANS-- Period of use:
, - Purpose: routing and protesting conductors and cables
- Construction: fabricated from helically wound interlocking metallic; crafted from scouse borrow
(galvanized, stainless) and aluminum; tiers from half to 4 in
- Application: indoors use besides situation to physical harm; supported each 4 half toes.; nail
gaurds.
- EGC acceptability: N/A
Grounded Electrode Conductor Requirements (GEC) - ANS-Compliance requirement:
- #8 AWG copper for 125 AMP and smaller
- #6 AWG copper for a hundred and fifty AMP and greater
- #four AWG copper for 200 AMP and more
- Aluminum twine can be used, but restrict make it impractical
- In more recent domestic, connection to water pipe GEC might not occur greater that 5-feet
from wherein pipe enters domestic
How close can a fan or mild be from a bathtub or bathe? - ANS-- 3 ft. Horizontally & 8 feet.
Vertically
How a ways should lighting fixtures be from a closet garage region (e.G., a shelf in the closet)? -
ANS-- Lights should not be positioned w/in 12 in. Of closet storage area
- Enclosed lighting fixtures must not be located w/in 6-in of closet garage vicinity
How is "brief circuit" described? - ANS-Low resistance route between a aspect and/or a
conductor and ground.
How many grounding electrodes are required in a residential home? - ANS-Old creation:
- One grounding electrode normally req'd
- Grounding electrodes need to be bonded collectively using equal length cord
New creation:
- steel water pipe won't be most effective grounding electrode
- 2 grounding electrodes req'd if rod and pipe grounding electrode is used
How ought to outbuilding be grounded? - ANS-No special grounding is required if feed through
a single branch circuit that is blanketed with the aid of the EGC. However, new department
circuits and feeders have to be connected to the grounding electrode. Neutral conductors need
to be isolated for the EFC and from sub panel.
How should the subpanel be grounded? - ANS-All impartial conductors must be linked to split
terminal bars which are isolated for the EGCs and from the enclosure. The terminal bars have to
be grounded to the enclosure.
In current construction (early 2000s), when and in which are ark fault circuit interrupters (AFCI)
required? - ANS-AFCI are required in 15/20 amp, 120 volt department circuits, excluding
bathrooms, laundry rooms, basements, crawlspaces, garages and the outdoors.
System Study Exam Questions with
Answers
1) What are 2 out of doors receptacle necessities? - ANS-Outdoor receptacles:
1) At least one GFCI included receptacle placed inside 78-in vertically from deck, balcony, or
porch
2) Receptacle available from outdoor
Are home inspectors required to check three & 4-manner switches? - ANS-Yes, inspectors are
required to test these switches from each switch and with exclusive transfer orientations.
Are Inspectors required to look into GFCIs? - ANS-While they're now not required to through
SOP, many do using either a tester or a trying out device.
- WA State requires testing all GFCIs.
Armored cable -- Describe its length of use, description, application, EGC acceptability? - ANS--
Period of use: From early 1900s to modern-day
- Description: insulate conductors in flexible interlocking steel protecting; can be clean or
corrugated, conductors wrapped in paper
- Application: Dry places no longer uncovered to moisture
- EGC acceptability: Yes, after 1959
Can & have to home inspectors check alarms (e.G., hearth or carbon monoxide)? - ANS-Home
inspectors:
- Test hearth & carbon monoxide detectors
- Test w/warning
- Button checks sound feature
- Button does no longer indicate alarm feature well
Note:
- Explain difficulty in record
Can exposed incandescent bulbs be positioned in garments closet? - ANS-Nope
,Define knob and tube and whilst it became used. - ANS-Knob and tube gets its name from the
ceramic insulators used to guide the conductors and from the ceramic tubes used to shield the
conducted when they ran via the framing contributors. Knob and tube become used from the
early 1900s to the Nineteen Thirties. It is taken into consideration out of date; but, it may be set
up nowadays as an extension of present knob and tube with permission from the nearby
constructing branch.
Define Service Equipment (e.G., essential close off) - ANS-Service device is the method to
disconnect all strength to the house. Service gadget may be circuit breakers, fuses, or switches.
Important:
- Disconnecting carrier gadget need to now not require running or pulling no extra than 6 circuit
breakers, fuse blocks, and switches in any combination.
- The carrier device must be classified to signify characteristic.
Do big equipment need disconnects? - ANS-Yes, huge appliances (HVAC, AC, and so forth.)
need to have a means to disconnect energy for protection and serviceability. The fuse or circuit
beaker is appropriate if in sight of appliance; a separate disconnect must be set up if now not.
During what duration wherein fuse-fashion OPDs hooked up in panelboards? - ANS--
Commonplace from Nineteen Forties to late Nineteen Sixties
Note:
- Usually panelboards the usage of fuses are beyond carrier lifestyles
Electrical steel tubing -- Describe its length of use, description, application, EGC acceptability? -
ANS-- Period of use: N/A
- Purpose: designed for routing and protesting conductors and cables
- Construction: Usually fabricated from PVC; ranges from half to 2 in diameter
- Application: Used in maximum locations; besides the ones exposed to physical damage; might
not be barried; may be imbedded in concrete; help every 3 ft from packing containers and
terminations; shield w/nail gaurds
- EGC acceptability: No
Electrical non-metallic tubing (EMT, AKA "thin wall") -- Describe its duration of use, description,
utility, EGC acceptability? - ANS-- Period of use: N/A
- Purpose: designed for routing and protesting conductors and cables
- Construction: spherical pipe made of steel or aluminum; levels from half of in to four in
- Application: maximum place besides situation to bodily damage, authorised type can be
barried and imbedded in concrete
- EGC acceptability: Yes, when appropriate fittings are used
Flexible steel conduit (FMC) -- Describe its duration of use, description, software, EGC
acceptability? - ANS-- Period of use:
, - Purpose: routing and protesting conductors and cables
- Construction: fabricated from helically wound interlocking metallic; crafted from scouse borrow
(galvanized, stainless) and aluminum; tiers from half to 4 in
- Application: indoors use besides situation to physical harm; supported each 4 half toes.; nail
gaurds.
- EGC acceptability: N/A
Grounded Electrode Conductor Requirements (GEC) - ANS-Compliance requirement:
- #8 AWG copper for 125 AMP and smaller
- #6 AWG copper for a hundred and fifty AMP and greater
- #four AWG copper for 200 AMP and more
- Aluminum twine can be used, but restrict make it impractical
- In more recent domestic, connection to water pipe GEC might not occur greater that 5-feet
from wherein pipe enters domestic
How close can a fan or mild be from a bathtub or bathe? - ANS-- 3 ft. Horizontally & 8 feet.
Vertically
How a ways should lighting fixtures be from a closet garage region (e.G., a shelf in the closet)? -
ANS-- Lights should not be positioned w/in 12 in. Of closet storage area
- Enclosed lighting fixtures must not be located w/in 6-in of closet garage vicinity
How is "brief circuit" described? - ANS-Low resistance route between a aspect and/or a
conductor and ground.
How many grounding electrodes are required in a residential home? - ANS-Old creation:
- One grounding electrode normally req'd
- Grounding electrodes need to be bonded collectively using equal length cord
New creation:
- steel water pipe won't be most effective grounding electrode
- 2 grounding electrodes req'd if rod and pipe grounding electrode is used
How ought to outbuilding be grounded? - ANS-No special grounding is required if feed through
a single branch circuit that is blanketed with the aid of the EGC. However, new department
circuits and feeders have to be connected to the grounding electrode. Neutral conductors need
to be isolated for the EFC and from sub panel.
How should the subpanel be grounded? - ANS-All impartial conductors must be linked to split
terminal bars which are isolated for the EGCs and from the enclosure. The terminal bars have to
be grounded to the enclosure.
In current construction (early 2000s), when and in which are ark fault circuit interrupters (AFCI)
required? - ANS-AFCI are required in 15/20 amp, 120 volt department circuits, excluding
bathrooms, laundry rooms, basements, crawlspaces, garages and the outdoors.
