2020 NEC Final exam 80 questions

The largest size THHN conductor permitted in a 3/8" FMC is __________ . ( a ) #16 ( b ) #14 ( c ) #12 ( d ) #10

#10 T. 348.22

Potential transformers, and other switchboard devices with potential coils shall be supplied by a circuit that is protected by standard overcurrent devices __________ amperes or less. ( a ) 15 ( b ) 20 ( c ) 25 ( d ) 30

15 408.52

Armored cable installed in thermal insulation shall have conductors rated at __________. The ampacity of the cable installed in these applications shall NOT exceed that of a 60°C-rated conductor. ( a ) 60°C ( b ) 194°F ( c ) 75°C ( d ) 90°F

194°F 320.80(A)

Receptacles that provide power for water - pump motors or for other loads directly related to the circulation and sanitation system must be located at least __________ from the inside walls of the pool. ( a ) 4' ( b ) 6' ( c ) 10' ( d ) 12'

6' 680.22(A)(2)

All audio equipment operating at greater than the low - voltage contact limit and located within __________ from the inside walls of a storable or portable immersion pool shall be grounded and shall be protected by a GFCI. ( a ) 6 ' ( b ) 8 ' ( c ) 10 ' ( d ) 12 '

6' 680.35(D)

Appliances, such as, __________ provided for public use rated 250v or less and 60 amps or less , 1ø or 3ø , shall be provided with GFCI protection for personnel . ( a ) vending machines ( b ) tire inflation machines ( c ) drinking water coolers ( d ) all of these

All of these 422.5(A)(2) • 422.5(A)(4) • 422.5(A)(5)

The only way to see an electrical hazard is __________ . ( a ) by wearing a switchman's hood ( b ) by observing signs and signals indicating its presence ( c ) by wearing 3D glasses ( d ) none of these

by observing signs and signals indicating its presence NFPA 70E

A cord connector that is supported by a permanently installed cord pendant shall be considered __________ . ( a ) receptacle outlet ( b ) permanent cord ( c ) lighting outlet ( d ) outlet device

receptacle outlet 210.50(A)

Enclosures for overcurrent protection devices must be mounted in a / an __________ position unless, that is shown to be impracticable . ( a ) horizontal ( b ) vertical ( c ) perspective ( d ) upright

vertical 240.33

The minimum size box that is to contain a flush device must NOT be less than __________ deep. ( a ) 3/4" ( b ) 15/16" ( c ) 1" ( d ) 1 1/2"

15 / 16" 314.24(B)(5)

The building disconnecting means for a one - circuit installation that supplies only limited loads of a single branch - circuit must have a rating NOT less than __________ . ( a ) 15 amps ( b ) 20 amps ( c ) 25 amps ( d ) 30 amps

15 amps 225.39(A)

The rating of an attachment plug and receptacle must NOT exceed __________ @ 250 volts for a cord - and - plug connected air conditioner. ( a ) 15 amps ( b ) 20 amps ( c ) 25 amps ( d ) 30 amps

15 amps 440.55(B)

An outdoor disconnecting means for a mobile home must be installed so the bottom of the enclosure is NOT less than ​__________ above the finished grade or working platform. ( a ) 12" ( b ) 18" ( c ) 24" ( d ) 30"

24" 550.32(F)

At least one 125 - volt, single-phase, 15 - or 20 - ampere - rated receptacle outlet shall be installed within __________ of the service equipment requiring servicing. ( a ) 6' ( b ) 10' ( c ) 25' ( d ) 50'

25 feet 210.63

The minimum number of overload unit ( s ) required for a three - phase motor is __________ . ( a ) 1 ( b ) 2 ( c ) 3 ( d ) 4

3 T. 430.37

A nursing home is an area for the lodging, boarding, and nursing care, on a 24 - hour basis, of __________ or more patients. ( a ) 4 ( b ) 20 ( c ) 50 ( d ) 100

4 or more 517.2 (DEF)

392.10(E) In airports where maintenance and supervision conditions ensure that only qualified persons can access , install , or service the cable , airfield lighting cable used in series circuits that are rated up to __________ volts and are powered by constant current regulators shall be permitted to be installed in cable trays . ( a ) 1000 ( b ) 2500 ( c ) 3000 ( d ) 5000

5,000 volts 392.10(E)

Locations in which easily ignitable combustible fibers are stored or handled other than in the process of manufacturing are designated as __________ . ( a ) nonhazardous ( b ) Class III , Division 2 ( c ) Class III , Division 1 ( d ) Class II , Division 2

Class III , Division 2 500.5(D)(2)

Examples of resistance heaters are ___________ . I. heating blankets II. heating tape III. heating barrel ( a ) I and II only ( b ) II and III only ( c ) III only ( d ) II only

I and II only 427.21 Informational Note

RV feeders from 208Y / 120 volt , 3ø systems shall be permitted to include ___________ . I. one equipment grounding conductor II. one grounded conductor III. three grounded conductors ( a ) I only ( b ) II only ( c ) I and II only ( d ) I, II, and III

I and II only 551.72(B)

Which of the following organizations would maintain records of tested electrical equipment ? ( a ) Underwriters ' Laboratories ( b ) National Fire Protection Association ( c ) National Electrical Contractors Association ( d ) IEEE

UL General Knowledge

The parallel conductors in each phase or grounded conductor must __________ . ( a ) be terminated in the same manner ( b ) be the same length and conductor material ( c ) have the same cma and insulation type ( d ) all of these

all of these 310.10(G)(2)

For cord - connected equipment such as __________ , a separable connector or an attachment plug and receptacle is permitted to serve as the disconnecting means. ( a ) drinking water coolers and beverage dispensers ( b ) room air conditioners ( c ) household refrigerators and freezers ( d ) all of these

all of these 440.13

Effective safe work practices are based on which of the following ? ( a ) Type of hazard ( b ) Manner of exposure ( c ) Degree of exposure ( d ) All of these

all of these NFPA 70E

The conductors supplying the supplementary overcurrent protective devices for fixed industrial process heating equipment shall be considered __________ conductors . ( a ) supplementary ( b ) tap ( c ) by - pass ( d ) branch circuit

branch circuit 425.22(D)

Provisions shall be made for sufficient diffusion and ventilation of the gases from the storage battery if present to prevent the accumulation of a / ( n ) __________ mixture. ( a ) explosive ( b ) corrosive ( c ) toxic ( d ) all of these

explosive 480.10(A)

The total number of AC cycles completed in one second is the current's __________ . ( a ) phase ( b ) alternation ( c ) frequency ( d ) timing

frequency General Knowledge

Type SE cable is permitted to be formed in a ___________ and taped with self - sealing weather - resistant thermoplastic. ( a ) doughnut ( b ) gooseneck ( c ) turtleback ( d ) loop

gooseneck 230.54(B) ex.

Heat generated internally in the conductor as the result of load current flow, including fundamental and ___________ currents. ( a ) dissipation ( b ) alternation ( c ) harmonic ( d ) transfer

harmonic 310.14(A)(3)(2)

Unused openings for breakers in panelboards must be closed using __________ or other approved means. ( a ) sheet metal ( b ) duct seal ( c ) exothermic welding ( d ) identified closures

identified closures 408.7

Central heating equipment, other than fixed electric space - heating equipment, must be supplied by a / ( n ) __________ branch circuit. ( a ) appliance ( b ) individual ( c ) HARC ( d ) controlled

individual 422.12

Supplementary overcurrent protection __________. ( a ) must be readily accessible ( b ) must NOT be used in luminaires ( c ) may be used to protect internal circuits of equipment ( d ) may be used as a substitute for a branch - circuit overcurrent protection device.

may be used to protect internal circuits of equipment 240.10

Each cable entering a cut - out box __________ . ( a ) can be sleeved through a bushing ( b ) shall be secured to the cut - out box ( c ) can have a maximum 2 cables per connector ( d ) all of these

shall be secured to the cut - out box 312.5(C)

The conductor insulation of Type MI cable must be a highly - compressed refractory mineral that will provide proper __________ for all conductors. ( a ) resistance ( b ) ohmic value ( c ) dielectric ( d ) spacing

spacing 332.112

The motor branch - circuit short - circuit and ground - fault protective device shall be capable of carrying the __________ current of the motor. ( a ) starting ( b ) in - rush ( c ) running ( d ) overload

starting 430.52(B)

When an ungrounded metal water - piping system is used as a grounding electrode, effective bonding must be provided around insulated joints and around any equipment that is likely to be disconnected for repairs or replacement. Bonding conductors must be of __________ to permit removal of such equipment while retaining the integrity of the bond. ( a ) cu / AL wire ( b ) stranded wire ( c ) flexible conduit ( d ) sufficient length

sufficient length 250.68(B)

In order to __________ NUCC, the conduit must be trimmed away from the conductors or cables using an approved method that will NOT damage the conductor or cable insulation or jacket. ( a ) install in a workman - like manner ( b ) terminate ( c ) connect to the fitting properly ( d ) all of these

terminate 354.28

Grounded conductors __________ and larger must be identified by a continuous white or gray outer finish along their entire length, by three continuous white stripes along their length, or by distinctive white or gray marking such as tape, paint, or other effective means at their terminations.. ( a ) #8 AWG ( b ) #6 AWG ( c ) #4 AWG ( d ) #2 AWG

#4 AWG 200.6(B)

The largest size grounding electrode conductor to a concrete - encased electrode is NOT required to be larger than __________ copper. ( a ) # 10 ( b ) # 8 ( c ) # 6 ( d ) # 4

#4 cu 250.66(B)

The power in a circuit is 2 W and the voltage is 20 VDC. What is the circuit current? I = W / E ( a ) .10A ( b ) .20A ( c ) .30A ( d ) .40A

.10A

Electrodes of nonferrous metal shall be at least __________ in thickness. ( a ) 0.06mm ( b ) .186" ( c ) 1.52" ( d ) 0.06"

0.06" 250.52(A)(7)

A circuit contains two 2,000 ohm resistors connected in parallel. What is the total resistance of the circuit? ( a ) 888.8 Ohms ( b ) 1,000 Ohms ( c ) 1,200 Ohms ( d ) 4,000 Ohms 2,000 ohm / 2 = 1,000 Ohms

1,000 Ohms 2,000 ohm / 2 = 1,000 Ohms

Voltage drop on sensitive electronic equipment systems must NOT exceed __________ for branch - circuits. ( a ) 1.5% ( b ) 2.5% ( c ) 3% ( d ) 5%

1.5% 647.4(D)

A portable motor which has an attachment plug and receptacle may use this type of attachment as the controller provided the motor does NOT exceed __________ horsepower. ( a ) 1/8 ( b ) 1/3 ( c ) 1 ( d ) 3

1/3 HP 430.81(B)

For hallways of ____________________ ft. or more in length, it is required to have at least one receptacle outlet. ( a ) 6 ( b ) 8 ( c ) 10 ( d ) 12

10' 210.52(H)

When supplying a room air conditioner rated 120 volts, the length of the flexible supply cord must NOT exceed __________ . ( a ) 6' ( b ) 8' ( c ) 10' ( d )12'

10' 440.64

Electrical services and feeders shall be calculated on the basis of NOT less than __________ per electrified truck parking space . ( a ) 11 kVA ( b ) 12 kVA ( c ) 15 kVA ( d ) 21 kVA

11 kVA 626.11

What is the maximum cord - and - plug connected load permitted on a 15 amp receptacle that is supplied by a 20 amp circuit supplying multiple outlets? ( a ) 12 amps ( b ) 16 amps ( c ) 20 amps ( d ) 24 amps

12 amps 210.21(B)(2) • T. 210.21(B)(2)

Straight runs of 1" RMC using threaded couplings may be secured at intervals NOT exceeding __________ . ( a ) 6' ( b ) 10' ( c ) 12' ( d ) 14'

12' 344.30(B)(2) • T. 344.30(B)(2)

210.8(C) GFCI protection shall be provided for lighting outlets NOT exceeding _________ volts installed in crawl spaces ( a ) 30 ( b ) 50 ( c ) 90 ( d ) 120

120V 210.8(C)

DC microgrid systems used as a source of power for emergency systems shall be of suitable rating and capacity to supply and maintain the total emergency load for NOT less than __________hours of full - demand operation. ( a ) 2 hours ( b ) 3 hours ( c ) 3 1/2 hours ( d ) 4 hours

2 hours 700.12(H)

Outdoor antennas and lead in conductors for radio and TV equipment must NOT cross over open conductors of electric light or power circuits, and must be kept well away from all such circuits to avoid the possibility of accidental contact. Where proximity to open electric light or power service conductors of less than 250 volts between conductors cannot be avoided, the installation must provide a clearance of at least __________ .

24" 810.13

In panelboards, where voltage on busbars is 150 volts and the bars are opposite polarity, held in free air, the minimum spacing between parts is __________ . ( a ) 3/4" ( b ) 1" ( c ) 1 1/2" ( d ) 2"

3/4" T. 408.56

For installations consisting of NOT more than two 2 - wire branch circuits , the building disconnecting means must have a rating of NOT less than __________ amps. ( a ) 15 ( b ) 20 ( c ) 25 ( d ) 30

30 amps 225.39(B)

Live parts exposed on the front of the switchboard are present, the working space in front of the switchboard shall NOT be less than __________ inches. ( a ) 24 ( b ) 30 ( c ) 36 ( d ) 42

36" T. 110.26(A)(1)

424.101(A) Low voltage heating power unit shall be an isolating type with a rated output NOT exceeding __________ volts peak ac. ( a ) 30 ( b ) 42.4 ( c ) 60 ( d ) 25

42.4V peak AC 424.101(A)

For systems over 1000 volts, the length of a pull box for a straight pull must be NOT less than __________ entering the box. ( a ) 18 times the diameter of the largest raceway ( b ) 36 times the diameter of the largest raceway ( c ) 36 times the largest conductor in the raceway ( d ) 48 times the outside diameter of the largest shielded conductor or cable

48 times the outside diameter of the largest shielded conductor or cable 314.71(A)

Fastening of unbroken lengths of EMT conduit can be increased to a distance of __________ from the termination point where the structural members do NOT readily permit fastening within 3 feet ( a ) 4 ' ( b ) 5 ' ( c ) 6 ' ( d ) 10 '

5' 358.30(A) ex. 1

Torque requirements for motor control circuit device terminals must be a minimum of __________ lbs -inch ( unless otherwise identified ) for screw - type pressure terminals used for # 14 and smaller cop per conductors . ( a ) 6 ( b ) 7 ( c ) 8 ( d ) 10

7 lbs - inch 430.9(C)

Metal surface raceways having splices and taps shall be permitted as long as the splices and taps and conductors do NOT fill the raceway more than __________ percent of the area of the raceway at that point. ( a ) 40 ( b ) 50 ( c ) 70 ( d ) 75

75% 386.56

The ampacity for the supply conductors for a resistance welder with a duty cycle of 15% and a primary current of 21 amps is ___________ . ( a ) 9.45 A ( b ) 8.19 A ( c ) 11.2 A ( d ) 21 A

8.19A T. 630.31(A)(2)

Lock - out / tag - out is an important part of isolating electrical equipment to be worked on. Which of the following should be secured before lock - out is executed? ( a ) A copy of the OSHA regulations for each person involved. ( b ) A supplemental list that shows all involved energy sources and energy isolating devices. ( c ) Knowledge that each person involved in the task is in control of all energy sources. ( d ) Both ( b ) and ( c )

Both ( b ) and ( c ) NFPA 70E

406.6(D)A Universal Serial Bus flush device cover plate that additionally provides a night light and / or ___________ output connector(s ) shall be listed. ( a ) one ( b ) two ( c ) Class I ( d ) Class II

Class II 406.6(D)

Type __________ cable consists of three or more flat copper conductors placed edge - to - edge and separated and enclosed within an insulation assembly. ( a ) NMC ( b ) AC ( c ) MI ( d ) FCC

FCC 324.2 DEF

A feeder must have a protective device with a rating or setting __________ branch - circuit short - circuit and ground - fault protective device for any motor in the group. ( a ) 125% of the largest rating of the ( b ) NOT greater than the largest rating or setting ( c ) 225% of the largest rating ( d ) none of these

NOT greater than the largest rating or setting 430.62(A)

What is the standard abbreviation for power on an electrical diagram? ( a ) PAR ( b ) PB ( c ) PF ( d ) PWR

PWR General Knowledge

Where more than two NM cables containing two or more current - carrying conductors are bundled together and pass through wood framing that is to be fire - stopped using thermal insulation, the ampacity of each conductor is __________ . ( a ) limited to 30 amps ( b ) limited to 20 amps ( c ) adjusted by 310.15(B)(2)(a) ( d ) approved by AHJ only

adjusted by 310.15(B)(2)(a) 334.80

For cord-and-plug connected appliances, an accessible separable connector or __________ plug and receptacle is permitted to serve as the disconnecting means. ( a ) a readily accessible ( b ) an isolated ( c ) an accessible ( d ) a guarded

an accessible 422.33(A)

Where overhead communications wires and cables enter buildings , they must __________. ( a ) where practicable , be located below the electric light or power conductors ( b ) NOT be attached to a cross - arm that carries electric light or power conductors ( c ) have a vertical clearance of NOT less than 8 ' from all points of roofs above which they pass ( d ) any of the above

any of the above 800.44(A)(1 & 2) • 800.44(B)

Flexible cords approved for and used with a specific listed appliance or portable lamp are considered to be protected when __________ . ( a ) #18 AWG and larger ( b ) #16 AWG and larger ( c ) NOT more than 6' long ( d ) applied within the listing requirements

applied within the listing requirements 240.5(B)(1)

Equipment intended to break current at fault levels shall have an interrupting rating at nominal circuit voltage sufficient for the current which is ___________ at the line terminals of the equipment. ( a ) at maximum ( b ) operating ( c ) available ( d ) required

available 110.9

When determining the number of conductors that are considered as current - carrying, a grounding conductor is __________ . ( a ) counted as one current - carrying conductor ( b ) counted as one conductor for each ground wire in the raceway ( c ) considered to be a current - carrying conductor but NOT counted ( d ) considered to be a non - current - carrying conductor and is NOT counted

considered to be a non - current - carrying conductor and is NOT counted 310.15(F)

A __________ must be located in sight from the motor location and the driven machinery location. ( a ) disconnecting means ( b ) circuit breaker ( c ) fuse ( d ) controller

disconnecting means 430.102(B)(1)

When working on live electrical circuits , the type of screwdriver that should be used has a / an ( a ) non - conducting handle ( b ) double triangle and rated - for - volts handle ( c ) ergonomically designed handle for safety ( d ) longer blade and square handle

double triangle and rated - for - volts handle General Knowledge

Where there is more than one driving machine in an elevator room, the disconnecting means must be numbered to correspond to the identifying number of the __________ . ( a ) driving machine they control ( b ) panelboard it is fed from ( c ) the branch circuit feeding it ( d ) all of these

driving machine they control 620.51(D)(1)

A / an __________ switch allows a worker to set a circuit breaker trip unity to "no intentional delay" to reduce the clearing time while the worker is working within the arc flash boundary. ( a ) safety ( b ) release action ( c ) double break ( d ) energy - reducing maintenance

energy - reducing maintenance 240.87 Informational Note

Concrete-encased electrodes of __________ shall NOT be required to be part of the grounding electrode system where the steel reinforcing bars or rods aren't accessible for use without disturbing the concrete. ( a ) gas stations ( b ) hazardous locations ( c ) health care facilities ( d ) existing buildings

existing buildings 250.50 Exception

A disconnecting means is required to disconnect the __________ from the circuit. ( a ) motor and controller ( b ) motor ( c ) motor or controller ( d ) controller

motor and controller 430.101

The localization of an overcurrent condition to restrict outages to the circuit or equipment affected , accomplished by the choice of overcurrent protective devices is called __________. ( a ) arc - fault interrupter ( b ) overload protection ( c ) selective coordination ( d ) none of these

selective coordination DEF 100

In dwelling units, when determining the spacing of general - use receptacles, __________ on exterior walls are NOT considered wall space. ( a ) sliding panels ( b ) windows ( c ) fixed panels ( d ) all of these

sliding panels 210.52(A)(2)(2)

In determining the dimensions addressing luminaires, the distance to be measured shall be __________ and imaginary cord connected to the luminaire would follow without piercing a floor, wall, ceiling, doorway with hinged or sliding door, window opening, or other effective permanent barrier. ( a ) the shortest path ( b ) at least 12' ( c ) at least 16' ( d ) 20'

the shortest path 680.22(B)(8)

A receptacle installed outdoors in a location protected from the weather or in other damp locations shall have an enclosure for the receptacle that is __________ when the receptacle is covered. ( a ) weatherproof ( b ) weathertight ( c ) rainproof ( d ) raintight

weatherproof 406.9(A)

Which of the following is a FALSE statement? ( a ) Where a building is supplied by more than one service, a permanent plaque or directory shall be installed at each service disconnect denoting the location of all other services. ( b ) Service conductors supplying a building are permitted to pass through the interior of another building. ( c ) Conductors other than service conductors shall NOT be installed in the same service. ( d ) Conductors run above the top level of a window shall be permitted to be less than 3 feet away from a window that is designed to be opened.

Service conductors supplying a building are permitted to pass through the interior of another building. 230.3

Conductors in a non - jacketed multiconductor cable , such as ribbon cable in a permanent amusement attraction shall NOT be smaller than __________ AWG. ( a ) #22 ( b ) #24 ( c ) #26 ( d ) #30

#26 AWG 522.21(B)

Circuits and equipment operating at less than 50 volts must use receptacles that are rated at NOT less than __________ amps . (a ) 15 ( b ) 20 ( c ) 25 ( d ) none of these

15 amps 720.6

The continuous current - carrying capacity of a 1 1/2 square inch copper busbar mounted in an unventilated enclosure is __________ amps. ( a ) 500 ( b ) 650 ( c ) 750 ( d ) 1500

1500 amps 366.23(A)

Receptacle outlets installed for a specific appliance in a dwelling unit, such as a clothes washer, dryer, range, or refrigerator, must be within _________ of the intended location of the appliance. ( a ) sight ( b ) no specified distance ( c ) 6' ( d ) 10'

6' 210.50(C)

The grounding conductor for secondary circuits of instrument transformers and for instrument cases shall NOT be smaller than #12 __________ . I. metal II. aluminum III. copper ( a ) I only ( b ) II only ( c ) III only ( d ) I, II or III

III only 250.178

GFCI protection for personnel is required for all 15 and 20 amp, 125 volt single - phase receptacles installed in a dwelling unit __________ . ( a ) laundry ( b ) garage ( c ) shower stalls ( d ) all of these

all of these 210.8(A)(2)

Equipment grounding conductors must be the same size as the circuit conductors for __________ amp circuit. ( a ) 30 ( b ) 20 ( c ) 15 ( d ) all of these

all of these T. 250.122

Underground service conductors shall have sufficient ampacity to carry the current for the load as calculated and shall have adequate __________ strength. ( a ) equivalent ( b ) physical ( c ) mechanical ( d ) conductor

mechanical 230.31(A)

Where motors are provided with terminal housings, the housings must be of __________ and of substantial construction. ( a ) metal ( b ) plastic ( c ) steel ( d ) all of these

metal 430.12(A)

A feeder or service neutral load shall be the maximum unbalance of the load calculated. The maximum unbalanced load shall be the maximum net calculated load between the __________ conductor and any one ungrounded conductor. ( a ) grounded ( b ) grounding ( c ) ungrounded ( d ) neutral

neutral 220.61(A)

Service and feeder conductors may be sized using Table 310.12 for __________ . ( a ) commercial services only ( b ) only multi-family dwelling services ( c ) any service under 400 amps ( d ) only 120 / 240V, 3 - wire services for single dwelling unit

only 120 / 240 volt, 3 - wire services for single dwelling unit T. 310.12

Four devices are connected in one circuit. The current through each of the devices is one - fourth of the circuit current. What kind of circuit connects the devices. ( a ) short circuit ( b ) parallel circuit ( c ) series circuit ( d ) open circuit

parallel circuit General Knowledge

Most incidents and injuries are initiated by __________ . ( a ) equipment failures ( b ) people ( c ) incomplete procedures ( d ) inadequate regulation enforcement

people NFPA 70E

A current - limiting overcurrent protective device is a device which will __________ the current flowing in the faulted circuit. ( a ) reduce ( b ) increase ( c ) maintain ( d ) none of these

reduce 240.2 DEF

All cut ends of flexible metal conduit must be trimmed or otherwise finished to remove rough edges, except where fittings __________ . ( a ) contain insulated bushings ( b ) are listed for grounding ( c ) thread into convolutions ( d ) are the compression type

thread into convolutions 348.28

The symbol for a three - phase delta wound generator consists of a circle with a __________ scribed inside. ( a ) cross ( b ) triangle ( c ) Y ( d ) star

triangle General Knowledge

Cabinets or cut - out boxes installed in a wet location must be __________ . ( a ) weatherproof ( b ) water proof ( c ) raintight ( d ) watertight

weatherproof 312.2