ELECTRICITY

Assuming copper, standard wire type, and normal temperature rating, what is the typical conductor size 9in awg) for a 60 A service in your country?

#6

In most areas, for what distance can service entrance wires run inside the building before going into the service box, without special permission?

0 feet, or as short as possible

When looking at a potlight you see the letters IC. This means it is -

For use in insulated ceiling

All of these are common receptacle problems except

GFI receptacles used outdoors

The best location for an outlet is -

Immediately beside a basin in a bathroom

When you find three-slot receptacles on ungrounded circuits, you might recommend any of the following except

Label the circuit at the panel "ungrounded"

What is linking?

Linking ensures that two fuses or circuit breakers are disconnected at the same time

Loose connections -

May start fires

All of these are common branch circuit problems except -

NMD wires run through floor joists without tubes or grommets

All of the following are common outdoor wiring problems except:

NMW wiring used outdoors

An ungrounded conductor is

Often called the hot conductor

Knob-and-tube wiring issues include all of the following except -

Over-heated neutrals on multi-wire branch circuits

A subpanel is supplying a 3-ton air conditioner (running load amps =18A) and an electric dryer (5000W). The 10 gauge copper subpanel feed wire is connected to a 60A breaker in the main panel. You should -

Recommend changing the size of the feed wire to match the breaker

The main service fuses have been installed with the labels facing backwards, not allowing you to read their rating. No other markings are visible. You should_____

Report that the main service fuse rating was not determinable

Common branch circuit wire materials include all of these except -

Silver - dipped copper

Ohm's Law. the relationship between voltage, current, and resistant in a simple circuit states

The answer is V=IR. V = IR and R= V/I.

Wires should not be run across the tops of ceiling joists in attics unless -

The attic height is less than 40 inches

The end of the neutral wire from a 3-conductor cable is overheating. The reason for this could be any of these except -

The circuit breakers are undersized

Putting a penny in a fuse holder is dangerous because

The circuit has no over-current protection

What do you call the wire that connects the system neutral to the water supply, well casing or ground rods?

The grounding electrode conductor

A 14 gauge copper wire is protected by a 20-amp fuse. You should report that ___

This is a defect and recommend improvement

A properly polirized circuit -

Will result in the threaded collar of a lamp being neutral

Common junction box problems include all of the following except

Wire nuts inside boxes

In a distribution panel, a black wire and a red wire are connected to separate breakers that are four breakers apart, on the same bus bar. Both wires are part of the same cable. The neutral from the cable connects to the neutral bus. The potential problem with this arrangement is__ a) The 240V appliance may not operate properly b) Breakers may not be linked c) The neutral wire may overheat d) All of the above

d) All of the above

Light fixtures are needed in all the following locations except -

in clothes closet

Special grease on aluminium wired

is found on stranded wires

Knob-and-tube wire burried in insulation -

is not permitted in some jurisdictions if the insulation is combustible

Which of the following devices are most likely to be rated co/alr

receptacles

Subpanels are___ a) prohibited in bathrooms b) prohibited in clothes closets c) prohibited in garages d) Both a and b

Both a nd b

Extension cords are

Stranded wire

NMD cable is

Suitable for indoor use

The unit for the measure of electrical power is

Watts

You notice rust in the service panel. Which of the following may be the cause? a) No drip loop b)Undersized conduit c)Damaged masthead d)Both (a) and (c)

d)Both (a) and (c)

Which of these wires is a home inspector required to inspect

wiring for a clock receptacle

In general, modern 120V circuits can accommodate how many outlets and/or light fixtures

12

If you used a multi-meter to measure the current in a 3000W electric water heater that uses both of the ungrounded ("hot") service conductors, it would read

12.5 A

The standard house voltage is

120/240v

Floor receptacle outlets cannot be counted as part of the required number of receptacle outlets unless located a maximum of ______ inches from the wall.

18

n a multi wire branch circuit, with the red and black wire improperly tapped from the same bus, if the red wire carries 10 amps, and the black wires carries 12 amps, the neutral wire will carry?

22 AMPS

Which of the following aluminium wire installations is most likely to overheat?

A receptacle with an electric heater

A kitchen split receptacle is

A receptacle with the top and bottom halves on different circuits

A multi-wire circuit has

A red and a black wire

Disadvantages of pig-tailing aluminium to copper wire are -

Adds more connections and leads to overcrowding boxes

Twist-on connectors (wire nuts) -

Are also called solderless connectors

Overheating is commonly caused by any one of these except -

Bulbs installed with the base down

The service drop wires

Connect to the house at the drip loop

Number 10 gauge wires are typically used for all of these except -

Dishwashers

Panel used with aluminium wire should

E rated cual