NHIE Exam II Electrical Questions and Answers All Correct
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Course
NHIE
Institution
NHIE
NHIE Exam II Electrical Questions and Answers All Correct
What is an issue with Edison base fuses? - Answer Edison base fuse is older and all size fuses are the same size, this is a safety problem
What is the color coding for the common sized Edison base fuses? - Answer 30 Amp - Green
25 Am...
NHIE Exam II Electrical Questions
and Answers All Correct
What is an issue with Edison base fuses? - Answer ✔ Edison base fuse is older and all
size fuses are the same size, this is a safety problem
What is the color coding for the common sized Edison base fuses? - Answer ✔ 30 Amp
- Green
25 Amp - Green or Yellow
20 Amp - Orange or Red
15 Amp - Blue or Purple
10 Amp - Yellow or Gray
What are the service life estimates for circuit breakers? - Answer ✔ 30 - 50 years
What are Ground Fault Circuit Interrupters (GFCI)? - Answer ✔ Ground Fault Circuit
Interrupters (GFCI) are intended to protect personnel from shock during a ground fault
condition. They measure current flow between hot and neutral wires.
Where are GFCI receptacles typically required? - Answer ✔ GFCI receptacles are
required in bathrooms, garages, crawl spaces, basements, laundry rooms and areas
where a water source is present.
When were GFCI first required? - Answer ✔ GFCI first requirement was in 1970 for
bathrooms, garage and outdoor receptacles
Are home inspectors required to test the GFCI? - Answer ✔ No
What are Arc Fault Circuit Interrupters (AFCI)? - Answer ✔ AFCI circuit breakers and
receptacle are intended to protect structures from fire caused during an arcing fault
condition.
NOTE: AFCI Protection is now required for most 15A and 20A branch circuits
When were AFCI first required? - Answer ✔ AFCI requirements began in early 2000
What are the two types of AFCI? - Answer ✔ 1) Branch Circuit / Feeder - No Longer
Acceptable - detect arcing between two conductors (Parallel Faults)
, 2) Combo Type - Detect arcing between conductors (Parallel Faults) and along the
conductor (Series Faults)
What are the differences between GFCI / AFCI? - Answer ✔ GFCI protect people from
shock & AFCI protect homes from fire
Where can you find the max OPD and minimum circuit amp rating for a condenser? -
Answer ✔ They are displayed on the condenser's label
Typical Defects for Electrical Enclosures
- Double tap - two conductors in a single lug (Exception is SquareD double saddle that
accepts two conductors of the same size)
- Contaminants such as paint and drywall in enclosure
- Melted insulation and charred conductors
- Circuit breaker manufacturer different from panelboard manufacturer - Answer ✔
Notes to Remember
Should a grounding connection be made to any grounded circuit conductor on the load
side of the service disconnect - Answer ✔ No
(T/F) The neutral conductor must be isolated from any EGC and other metal at all points
downstream from service equipment - Answer ✔ True
Typical Subpanel Grounding / Bonding Defects
- EGC and neutral conductors are connected to the same terminal bar
- EGC or EGC terminal bar is not bonded to enclosure - Answer ✔ Notes to remember
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