Chapter 1 Article 100 A Flashcards by José Antonio Rodríguez Soto

The authority having jurisdiction has the responsibility of

1- Making interpretations of rules
2- for deciding upon the approval of equipment and materials
3- waiving specific requirements in the code, permitting alternate methods if safety is maintained
90.3 C. 90.4

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The words “Shall” and “Shall Not”, in the NEC means?

A mandatory requirement.

90.5 A

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The word
“Shall be Permitted” means

the identification of actions that are allowed but it is nat required in NEC.
90.5 B

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The code specify that one equipment shall be “in sight from”, within sight from” or “within sight of” and so forth, another equipment, the specified equipment is to be visible and not more than ___________

50 Ft distant from the other

Article 100 Definition

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On a 4-wire, delta-connected system where the mid point of one phase winding’s grounded, only the conductor or busbar having the higher voltage to ground shall be durably and permanently marked by an outer finish that is ___________ in color or by other effective means.

Such identification Shall be placed at each point on the system where a connection is made if the grounded conductor is also present.

Orange Color

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The required working space for access to live parts operating at 300volts to ground, where there are exposed live parts on one side and grounded parts on the other side is

3 1/2 ft =42 inches

110.26 table condition # 2

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The dimensions of working space for access to live parts operating 300 volts nominal to ground, where there are exposed live parts on both sides of the workspace is

4 ft
110.26 conduction #3

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The working space for 150 volts or less, in any the condition named in table 110.26 will be

3 ft all condition

Table 110.26

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Article 300

Wiring Methods

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Wiring Methods

Cover all wiring Installations, Raceways,Wiring, Voltages up to 600 nominal volts

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Armored Cable, Type AC. A fabricated assembly of insulated conductors in a flexible metallic enclosure. See 320.100 for construction
The Trade Name is _________

BX. trade name

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which cable have an armor
of flexible metal tape and shall have an INTERNAL BONDING
STRIP of COPPER OR ALUMINUM in intimate contact with the
armor for its entire length.

AC cable is construction

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The AC cable is use permitted

(1) For feeders and branch circuits in both exposed and
concealed work
(2) In cable trays
(3) In dry locations
(4) Embedded in plaster finish on brick or other masonry,
except in DAMP OR WET LOCATIONS
(5) To be run or fished in the air voids of masonry block or
tile walls where such walls are not exposed or subject
to excessive moisture or dampness

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Uses NOT Permitted for Type AC Cable

320.12 Uses Not Permitted. Type AC cable shall not be
used as follows:
(1) Where subject to physical damage
(2) In damp or wet locations
(3) In air voids of masonry block or tile walls where such
walls are exposed or subject to excessive moisture or
dampness
(4) Where exposed to corrosive fumes or vapors
(5) Embedded in plaster finish on brick or other masonry
in damp or wet locations

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Bending Radius. Bends in Type AC cable shall be

five times the diameter of the Type AC cable.

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Supporting the AC Cable shall not be more than ____

(41⁄2 ft).

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320.30 Supporting.

AC Cable shall be supported with

320.30 Securing and Supporting.

(A) General. Type AC cable shall be supported and secured by staples, cable ties, straps, hangers, or similar fittings, designed and installed so as not to damage the cable.

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320.30 Securing

AC cable shall be secure with ….

Type AC cable
shall be secured within 12 in. of every outlet box, junction box, cabinet, or fitting and at intervals not
exceeding 41⁄2 ft. where installed on or across framing members.

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Where we can install or what is the designed for the
Flat Conductor Cable: ( Type FCC Cable)

Type FCC ( flat conductor cable )
is designed to use it under carpet
squares

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FCC Cable used permitted

Branch Circuits

Only in Commercial applications

(A) Branch Circuits, for general-purpose and appliance branch circuits
and for individual branch circuits.

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FCC Cable Branch Circuits Ratings

(2) Current. General-purpose and appliance branch circuits shall have ratings not exceeding 20 amperes.

INDIVIDUALS branch circuits shall have ratings not exceeding 30. amperes.

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324.12 Uses Not Permitted. FCC systems shall not be
used in the following locations:

(4) In residential, school, and hospital buildings

1) Outdoors or in wet locations

(2) Where subject to corrosive vapors

(3) In any hazardous (classified) location

(4) In residential, school, and hospital buildings

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Type AC Cable

Armored Cable

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Type FCC

Flat Conductor Cable

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Type FCC Cable

Flat Conductor Cable

Type IGS Cable

Integrated Gas Spacer Cable

Type MV Cable

Medium Voltage Cable Rate only for 2001 To 35,000 nominal volts

Article 402 Fixture Wires One of the requirement is that NOT Fixture wires can be Smaller than ______

18 AWG

Fixture Wires MUST be of a type listed in Table 402.3 and should be comply with all the requirements ln the table.

A lot of them but all have a letter F TFFN FFN-2 HF XF ETC. And all good for voltage of 600 V nominal

90.1 Purpose of the NEC

1- Practical safeguarding 2- Adequacy 3- Intentention

320.30 Securing AC cable shall be secured ….

320.30 Securing B) Securing. Unless otherwise provided, Type AC cable shall be secured within 12 in of every outlet box, junction box, cabinet, or fitting and at intervals not exceeding 41⁄2 ft where installed on or across fram- ing members.

Surge arresters less than 1 kV are also known

as Type 1 SPDs.

Transient voltage surge suppressors (TVSSs) are also known as

Type 2 and Type 3 SPDs

285.23 Type 1 SPD Surge Arresters ( Surge Protective Divice 1 K or Less ) Type 1 SPD shall be installed in accordance with 285.23(A) and B. connected to the supply side of the service disconnect as permitted in 230.82(4)

At the Service disconnect; When installed at service disconnect, the GROUNDING conductor of a Type 1 SPD, 1K or less, shall be connected to one of the following: (1) Grounded service conductor (2) Grounding electrode conductor (3) Grounding electrode for the service (4). Equipment grounding terminal in the service equipment

Conductors Shall be installed within a raceway, cable, or enclosure.

True 300.3(A)

All Conductors of a circuit, including the grounded and equipment grounding conductors, shall be contained within the same _________, unless permitted elsewhere in the code.

Raceway, Cable, Trench

Conductors of AC and DC circuits, rated 600V or less, can occupy the same ________ provided that all conductors have an insulation rating equal to the maximum voltage applied to any conductor.

Enclosure, Cable, Raceway Important Classification have to be the same Class 1 or Class 2

Where direct buried conductors and cables emerge from grade, they shall be protected by enclosures or raceways to a point_______above finished grade. Test question

8 ft.

Direct-buried service conductors that are not encased in concrete and that are buried 18 in. or more below grade shall have their location identified by a warning ribbon placed in the trench at least________ above the underground installation.

12 in.

Direct-buried conductors or cables can be spliced or tapped without the use of splice boxes when the splice or tap is made in accordance with 110.14(B).

True

Backfill used for underground wiring shall not_________

Damage the wiring method prevent compaction of the fill contribute to the corrosion of the raceway

conduits or raceways through which moisture may contact live parts shall be ____________at either or both ends.

sealed Plugged

When installing direct-buried cables, a ________shall be used at the end of a conduit that terminates underground

terminal fitting bushing. 300.5H

All Conductors of the same circuit Shall be _________, unless otherwise specifically permitted in the Code

1- In the same raceway or cable 2- in close proximity in the same trench

Direct-buried conductors, cables, raceways, which are subject to movement by settlement or frost, shall be arranged to prevent damage to the _________ or to equipment connected to the raceways.

The enclosed conductors.

Cables or raceways installed using directional boring equipment Shall be ______ for this purpose.

Approved

Raceways, Cable trays, cables, auxiliary gutters, cable armor, boxes, cable seating,cabinets, elbows, couplings, fittings, support hardware shall be of materials suitable for _________. Test Question

the environment in which they are to be

Where corrosion protection is pessary for ferrous metal equipment and the conduit is threaded in the field, the threads Shall be coated with a(n) ________, electrically conductive, corrossion-resistant compound.

Approved

Which of the following metal parts Shall be protected from corrosion?

1- Ferrous metal raceways 2- Ferrous metal elbowa 3- Ferrous boxes

Aluminum Raceways, Cable trays, cablesbus, auxiliary gutters, cable armor, boxes, cable sheathing, cabinets, elbows, couplings, nipples, fittings, supports, and support hardware ____________ shall be provided with supplementary corrosion protection.

1- embedded or encased in concrete 2- in direct contact with the earth

Nonmetallic raceways, cable trays, boxes, cables with a nonmetallic outer jacket, fittings, and support hardware shall be __________.

1- listed as sunlight resistant 2- identified as sunlight resistant

Where nonmetallic wiring methods are subject to exposure to chemical solvents or vapors, they shall be inherently resistant to chemicals based upon their being

listed for the chemical identified for the chemical

An exposed wiring system for indoor wet locations where walls are frequently washed shall be mounted so that there is at least a

1/4 in. airspace

In general, areas where acids and alkali chemicals are handled and stored may present corrosive conditions, particularly when wet or damp

True

Where portions of a cable raceway or sleeve are subjected to different temperatures and condensation is known to be a problem, the warm air to a colder section of the raceway or sleeve.

raceways or sleeve

Raceways shall be provided with expansion fittings where necessary to compensate for thermal expansion and contraction.

True

Raceways or cable trays containing electric conductors shall not contain any pipe or tube for steam, water, air, gas, drainage, or any service other than

Electrical

Where raceways are installed in wet locations above grade, the interior of these raceways shall be considered a __________ location.

Wet

Metal raceways, cable armors, and other metal enclosures shall be _______ joined together into a continuous electric conductor so as to provide effective electrical continuity.

metallically

Heating Cables installed inPoured concrete or masonry floors Shall not exceed ______ watts/linear foot of cable

161/2 watts/linear food of cable 424.44 (A)

Marking a heating cables should be identified 3inches from the terminal end. 1- 120V 2- 208V 3- 240V 4- 277V 5- 480V

1- Yellow. 120V 2- Blue. 208V 3- Red. 240 V 4- Brown 277V 5- Orange 480V

430.52. Branch-Circuit Short-Circuit and Ground-Fault Protective Devices Circuit motor. 1 Time Fuse Dual fuse ITbreaker

Wound motors and DC motors wil be150% Others motors 300% 175% 250%

for Circuit Breaker Rating in Motors ( not Wound or DC motors ) we shall multiply FLC (amps) times (X) __________.

motors we should Multiply 250% (2.5) times (X) the amp (FLC) of the motor 20Amps X 250% = 50 amps breaker (Table 240.6 Breaker size)

For size wire in Motors ( not wound or DC )we multiply _______.

FLA. X 250 %

Standard Ampere Ratings. 📲 SIZES (A) Fuses and Fixed-Trip Circuit Breakers. The standard ampere ratings for fuses and inverse time circuit breakers shall be considered __________. this is when I rounded

15, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 110, 125, 150, 175, 200, 225, 250, 300, 350, 400, 450, 500, 600, 700, 800, 1000, 1200, 1600, 2000, 2500, 3000, 4000, 5000, and 6000 amperes.

Additional standard ampere ratings for fuses shall be ___________

1, 3, 6, 10, and 601.

The Total Voltage Drop Is_________?

The Total is 5% The Maximum in Feeders 3%. and BC (Branch Circuits ) 3% Exemption In dewlling units. Can Be Feeder 4%. BC 1% for a Total 5%

X-Ray Installations, Long-Time Rating_________

5 Minutes or longer

X-Ray Installations, Momentary Rating _____________

Do Not exceed 5 Seconds

Grounding of Receptacles and Fixed Electrical Equipment in Patient Care Areas WIRING METHODS

All Branch Circuits Shall Provided EFFECTIVE GROUND-FAULT CURRENT PATH

Grounding of Receptacles and Fixed Electrical Equipment in Patient Care Areas. PANEL BOARDS BONDING

BONDING panel boards Close by SHALL be CONNECTED TOGETHER With insulated Cooper conductor not less of 10 AWG

Chapter 9 Table 1. Fill % Conduits

1 wire 53% 2 wires 31% over 2 wires. 40% Nipple 24 inches or less 60%

24 inches or less nipple the wire Filling is _________

60%

calculating conduits fill table 1 % fill table 4 total area conduit table 5 wire size and area sq/in. (in2)

Table 1 1 Wire 53% 2 Wires 31% over 2 Wires 40% 24" nipple 60% Table 4 Conduit size Conduit Total Area Conduit % area Table 5 Wire Type Wire size Wire Area

Equipment Grounding ELECTRO NOT more that _______ size

3/0 size

Man Hole Cover UNDER 100 pounds Does not Required _________

tools

What side Circuit Breaker required for Portable X-ray ?

60 amps

What side Circuit Breaker required for Stationary X-ray ?

30 amps

For Air acondicionado calculating wire size amps times (X) 125 %

Yes

for- AC -calculating Branch Circuit Protection

Multiplier Amps times (X) 175% for breaker for wire size 125%

The flexible cord for Room AC MUST not exceed ________ for 120V and __________ for 208V or 240V units.

10 FT. 120V units 6 Ft 240V units

MBJ (main bonding jumper) is at the _________

at the Service.

can be a Transformer or a Generator a separate dirives system

Yes but not a service

SBJ ( system Bonding Jumper ) is in a separately derive system

at the System and/or generator

For 3 Phase overcurrent protection I multiply 1.73

voltage X 1.73. (3 phase)

Basic formula find power ( watts) (VA)

P = E x I Watts = Voltage x Amps

Basic formula to Find E. ( Voltage )

E = R x I Voltage = Ohms (R) x I (Amps) E= P / I Voltage = Watts / Amps

For Transformers 9 Amps or more and get protection size we multiply _______

125% and go higher breaker if we don't have the right size breaker

continuous and noncontinuous loads, the rating of the overcurrent device shall not be less than the noncontinuous load multiply ________.

125 percent (x 1.25 )

when we come out of the secondary transformer those wires are considered _________

Feeders Conductors for overcurrent protection you multiply by 125%

an Auto transformer is NOT a _______ system.

separately derived system

Transformers and Transformer Vaults (Including Secondary Ties) The maximum temp Mechanical ventilation and/or air conditioning shall be provided _________ .

104°F ambient temperature in the room.

Transformers Open Installations. Dry-type transformers 600 volts, nominal, or less, located in the open on walls, columns, or structures, shall not be required to be readily accessible

True

Table 1 conduit fill % 1 wire _____ 2wire _______ Over 2wire ______

1 wire 53% 2 wires 31% Over 2 wires 40% 24 inch or less nipple 60%

Chapter 1 Article 100 A Flashcards

(94 cards)