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48 Cards in this Set
- Front
- Back
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Which condition at the main panel should NOT be reported as a safety hazard? |
Live current in the main panel |
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Which conditions SHOULD be reported as a safety hazard? |
Undersized branch circuit wiring System not grounded Inoperable gfci |
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What is NOT an overcurrent protection device? |
Meter |
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A type of box that holds splices, outlets and switches is called: |
Junction box |
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Electricity moves along wires known as |
Conductors |
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T/F: tapping before the main disconnect is considered an insafe practice? |
True |
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The electrical pressure that pushes through wires is known as |
Voltage |
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Upgrading to ___fuses stores over fusing |
S |
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Electric dryer receptacles in older houses require |
Their own circuit |
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T/F; all in panel electrical splices should be reported as improper |
False |
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What method of sub-panep wiring is NOT acceptable? |
Feeder wires tapped at the main disconnect in main panel |
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T/F: horizontal faced up countertop receptacles are permitted. |
False |
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Whay should be reported as a problem with an electrical panel I'm regards to breakers? |
Unlinked double pole breakers |
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Above ground cables connecting a utility pole to service entrance conductors are: |
Service drop |
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A panel using double pole breaker to isolate 120V circuits is called: |
Split bus panel |
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Aluminum wire size for 20 Amp is: |
10 awg |
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Three conductors at the weatherhead. What is the nominal electric service? |
Split phase 120/240 volts |
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How many conductors is three pgase 240 volts? |
4 |
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The larger the diameter of the conductor: |
The more current it carries |
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Most common color coding for 240v conductors is: |
Black/red for hot and white for neutral/ground |
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What is true about 240v breakers? |
They should be tied together |
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Which kind of scree is the hot wire connected? |
Brass |
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T/F: several grounded conductors can terminate on the same lug |
False |
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What is minimum service for town home? |
100 Amps |
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Problematic solid aluminum wiring was replaced for copper in what years? |
1965-1978 |
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Reversed polarity means |
Hot and grounded are reversed |
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Is it code to connect aluminum wire to an outlet? |
Maybe - if the outlet is rated for that wire |
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In Subpanel you are required to: |
Isolate neutral bus and conductors from contacting the panel enclosure |
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Gfci functions by sensing |
A current imbalance between hot (ungrounded) and neutral (grounded) |
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Unused breaker openings are |
Dangerous and pose electrical hazard |
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Resistance is |
Ohms |
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What is an unused knockout? |
A fuse holder without fuse in it. When removed it exposes electrical shock |
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When testing gfci reset device in hall bathroom, you find that power shuts off to outlets in other bathrooms as well. You conclude that: |
All these outlets are properly wired on same gfco. No correction needed. |
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Panel clear space measuring |
30"W x 80"H x 36"D |
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Gfci is now required for |
Garages |
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Zinsco is sometimes branded as |
Sylvania |
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3 hole grounding type electrical receptacles must be |
Grounded |
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What does service drop loop prevent? |
Water entering meter base and panel |
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Modern branch circuit wiring is used primarily for: |
Electric ovens |
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Besides aluminum, the most common residential wiring material is |
Copper |
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Minimum service drop above roadway |
18 ft |
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T/F: water dropping from panel must be investigated |
False |
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According to NEC, gfcis need NOT be installed in |
By overhead garage door opener |
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In New construction what would NOT be considered an electrical system defect? |
#12 copper wire to 15amp breaker |
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If a light fixtures fails to work, what should you do? |
Determine whether bulb is dead |
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Problematic solid aluminum was used in what years? |
1965-1978 used |
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Common cause of arc flashes when removing panel front is from |
Incorrect fasteners |
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Most recommended method of repairing aluminum branch circuit wiring in 1980 was |
COPALUM crimp connectors to bond copper to aluminum wiring at each connection/splice |
