8chapters 19,20,21
true
a dual-element fuse size at approximately 125% of the full load current rating of the motor adds extra overprotection to the overload protection built into a food waste disposal?
GFCI
a duplex grounding type receptacle is usually installed in it accessible location under the sink for plugging in the dishwasher and food waste disposal and it does not have to be........ protected
125 percent
a feeder or service neutral load can be figured at ........ of the load on the ungrounded conductor for ranges and ovens
interrupt all ungrounded circuit conductors
a unit switch used as a disconnect means for an appliance shall
load management controls conductors have overcurrent protection shall be permitted within service raceways
according to NEC 230. 7 conductors other than service entrance conductors are not permitted in the same raceways as the service entrance conductors. however, what does exception number 2 permit?
a horsepower-rated switch
all of the following are acceptable disconnecting means for appliances except for .......
125 percent
an electric water heater is a continuous load that requires that their branch circuit rating must not be less than ....... of the nameplate rating
50 ft
an individual motor disconnect must be in sight of the motor control and must disconnect a controller. that NEC definition of in sight means that the controller must be visible and not more than ......... from the disconnect
250
article ...... part VI covers equipment grounding and Equipment grounding conductors
NEC 430.102
article 430 contains requirements for Motor installation the section that requires a motor disconnect to be within sight of the motor or capable of being locked is ........
125
because a water heater represents a continuous load, the branch circuit must be rated not less than ..... percent of the water heater nameplate rating.
true
because of the problem of people being scalded many Municipal and states have implemented code requirements that water heater thermostats to be set at not over a 120 degrees
to preserve rates Utility Company Mesa clocks to prevent high power consumption
briefly explain what is meant by the electrical utility program known by all of the following names time of day time-of-use and off-peak
40 Ampere
calculate the overcurrent protection needed for a countertop cooking unit rated at 7450 Watts 120 / 240 voltd
dryer, rangr
cord set rated 30 amperes are usually called ........ cords and cord sets rated 40 45 or 50 amperes are called ....... cords
false
dishwashers and kitchen waste disposal may be connected to any of the required 20 amperage small appliance branch circuit in the kitchen
115/230
dual voltage rated pumps are rated
the cabinet door can be classified as a bear avoiding a 6-foot roof from the sink
explain why 125 volt 15 or 20 amp receptacles installed in a under cabinet space to supply dishwasher and or food waste disposal is not required to have GFCI protection for personal use
to add a safety Factor by higher the normal voltage's this help reduce premature burnouts of heating elements if the voltage or 5% higher
explain why heating elements in water heaters are frequently rated 250 vote for operation on 240 volt circuit
30 amperes maximum
for appliances that have no marked maximum overcurrent protection, the branch circuit overcurrent protection is sized at .......
load demand is figure that 8Kw that are rated less than 12 KW
in table 220 55 what is the rationale for allowing demand factors for electric ranges but not for a wall-mounted oven or individual counter mounted cooking units
breaker
lock off Provisions for appliances must be permanent installed on the are switch
horsepower-rated
motor disconnects are required to be ...........
direct connection, junction box
name at least two different methods for connecting electric ranges ovens and cooktops
longer
on all types and ratings of receptacle the ground and blade is ....... then the others to ensure that it makes its connection before the grounded conductors do and break its connection after they do (first make last break).
dryer, range
receptacles rated 30 amperes are referred to as ....... receptacles, and receptacles rated 50 amperes are called ......... receptacles
a raceway with suitable conductors
should it be required to run a pump's circuit underground for any distance it is necessary to install type UF or type USE cable or .......... and then make up the necessary splices in a listed weatherproof junction box
portable
small appliance circuits are intended to serve countertops for cord-connected ....... appliances only
is not
submersible pump cable supplied with pump assemblies ......... also suitable for direct burial
use amperage rating table NEC 240 6
the NEC permits overcurrent protection devices for individual Branch circuits to appliances to be sized up to 150% of the Appliance amperage rating however if the 150% sizing does not correspond to a standard size fuse are circuit breaker then what is permitted
422
the code article that specifically addresses electrical appliances
440
the code requirement for standard resistant type of electric water heaters are found in article 422. because heat pump water heaters contain a hermetic refrigerant motor compressor their code requirement are found in article ........
3 ft
the maximum flexible cord length permitted for kitchen waste disposal is ........
heaters
the overload protection for a motor might be thermal overloads sometime called ........ in the controller electronic sensing overloads device built-in thermal protection or time delay fuses
marked-off-position
unit switches that have a ...... are acceptable as the disconnecting means for that Appliance
higher
what are the values of branch circuit protection required for Motors according to table 430.52 do not correspond to standard ratings as listed in NEC 240. 6 the next ........ rating is permitted to use
is not
when a food waste disposer has a integral on-off switch an additional separately installed switch ......... required
both a and c
when a non motor operated electrical Appliance is not Mark what is overcurrent protection device ratings NEC 422. 11 (e) States that the branch circuit overcurrent protection shell be .......
100 percent
when a separate branch circuit is ran to a wall-mounted oven or to a counter mounted cooking unit the branch circuit sizes based on ......... of the nameplate rating of the appliance
422.11 (a)
NEC ....... requires that the branch circuit overcurrent protection shall not exceed the ratings marked on the appliance
either A or B
NEC 422.60 (A) requires that an appliance nameplate show.......
open all
NEC 430.103 requires that a disconnecting means for a motor shall ..... ungrounded conductors
12
Per of specifications the branch circuit conductors for food waste disposals and dishwashers are ........ AWG