They can also be installed in panelboards or control boards that are in rooms or enclosures free from dampness, easily ignitable material and accessible only to qualified personnel. NEC Requirements for Conductor Material Types and Sizing Requirements, Electrical Troubleshooting Quiz July 19, 2022, NEC Requirements for Overvoltage Protection, EC&M Tech Talk Video Medium-Voltage Conductors and Cable, Monthly Quiz: Grounding and Bonding Connections. Ready accessibility to wiring in luminaires is required in all cases required when a building is considered public c.not required dat required if there is a junction bexaby ANS: PTS: REF: Definitions A load having the maximum level of current sustained for three hours or more is referred to as a load. Next we will jump to 240.24 Location in or on Premises. enclosed channel of metal (or nonmetallic) materials, article 100 defines raceway as a(n) ____designed expressly for holding wires, cables, or busbars. Branch Circuit The circuit conductors found between a circuits final overcurrent protective device (breaker) and the circuits outlet is called a branch circuit. 100 iops/gb and 100,000 iops per volume oci, Article xi of the code of ethics for professional teacher, The problem of concept drift: definitions and related work, Comparison between micro teaching and traditional teaching, Match the following terms with their definitions communism, Nursing definition by florence nightingale, What is the definition of compare and contrast, Cscmp supply chain management definitions and glossary, Contents Article 1 Article 2 Article 3 Article, Definitions Verbs Adjectives Nouns Genre 100 100 100, Measurement Scientific Definitions Method Graphing 100 100 100, Definitions Adjectives Conjunctions or Interjections 100 100 100, Definitive Article Definite article The The definite article, Contrat Article 60 7 Contrat Article 61 Article, On The Constitution Article 1 Article 2 Article, article definite article indefinite article anaphoric anaphoricity judgement, Definite Article Definite article The The definite article, Modifiers Article Personal Pronoun Article Possessive Pronoun Article, XML article idhw titleHellotitle paraHello objectWorldobjectpara article article, ARTICLE 8 Civil Code of the Philippines Article, 2020 Electrical Advisory Board Article 100 and 200, ORAL PATHOLOGY DEFINITIONS PATHOLOGY DEFINITIONS PATHOLOGY DIAGNOSIS DEFINITIONS, Genetic Definitions Karyotype Genetic Definitions Genetic Definitions Genetic, Electrical Safety Basic Electrical Safety Electrical Course not, Electrical Charge Electrical Force and Electric Fields Electrical, Electrical Technology What is Electrical Technology n Electrical, Electrical Circuits Electrical Circuits l Electrical circuits will. A feeder consists of all circuit conductors located between the service equipment, the source of a separately derived system, or other power supply source and the final branchcircuit overcurrent device. Select one: A. A cable assembly's ____ conductor can be used as a switch loop (leg) in single-pole, three-way, and four-way switch installations, even though it is an ungrounded (hot) conductor. Cable tester is a device which is used to test a cable. First week only $4.99! There a multi-wire circuit must consists of two or more ungrounded (hot) conductors that have a voltage between them. B. The NEC.arose as a consensus of more than 1200 individuals primarily to omhat wing spidemic of electrical fires standardize equipment d.standardie price schedules REF: ANS: PTS: Electrical Code The National 7. Electrical Engineering questions and answers, FLAC NEC Whi MULTIPLE CHOICE 1 Wiring components are considered accessible if(t) access can be gained without damaging the structure or finish of the building or if (2) they are ae Sledstry of the wiring here salatile in the ANS: PTS: 1 REF: Definitions 2. white, gray, green, or, green with yellow stripe(s). Overcurrent devices do not have to be readily accessible if ____. Neutral Conductor or Point D. The neutral point is the midpoint on a single-phase portion of a 3 wire direct current system. If a vented dry-type transformer is installed in an equipment room with a door: A terminal bar for equipment grounding conductors (EGCs), system bonding jumpers, supply-side bonding jumpers, and grounding electrode conductors (GECs) must be installed and bonded inside the transformer enclosure [Sec. . Open conductors, open multiconductor cables, and service-drop conductors of not over 600 volts, nominal, shall conform to the minimum clearances specified in Table S-6. On three-phase, three-wire circuits, an overcurrent relay in the residual circuit of the current transformers may replace one of the phase relays. What is the angle pull for a raceway in the horizontal dimension where the trade size of the largest raceway is 3 and the sum of the other raceways in the same row on the same wall is 4?v. Overhead service conductors may not be installed beneath openings through which materials may be moved, such as openings in farm and commercial buildings, and may not be installed where they will obstruct entrance to these building openings. They cant be attached to any fire escape, downspout or plumbing equipment. 450.13 contains accessibility requirements. If the door is an inswing type, ensure the opened door will not block the transformer vent. Systems supplying portable or mobile high voltage equipment, other than substations installed on a temporary basis, shall comply with the following: The system shall have its neutral grounded through an impedance. Damp locations are those subject to moderate degrees of moisture. B. FLAC NEC Whi MULTIPLE CHOICE 1 Wiring components are considered accessible if(t) access can be gained without damaging the structure or finish of the building or if (2) they are ae Sledstry of the wiring here salatile in the ANS: PTS: 1 REF: Definitions 2. Above finished grade or sidewalks, or from any platform or projection from which they might be reached. 240.6(A). A fitting is an accessory, such as a locknut or bushing, whose function is primarily mechanical, rather than electrical in nature. - Maximum Cord- and Plug-Connected Load to Receptacle, Table S-5. Equipment found damaged or defective shall not be used until repaired; The following tests shall be performed on all cord sets and receptacles which are not a part of the permanent wiring of the building or structure, and cord- and plug-connected equipment required to be grounded: All equipment grounding conductors shall be tested for continuity and shall be electrically continuous; Each receptacle and attachment cap or plug shall be tested for correct attachment of the equipment grounding conductor. I think you need to back up a few paragraphs, within article 100. LOCATED ADJACENT TO THE EQUIPMENT WHERE ACCESS IS ACHIEVED BY THE USE OF PORTABLE MEANS, C.THE TOTAL LOAD OF THE ADJACENT CIRCUIT DOES NOT EXCEED LOCAL STANDARDS, D.THE DISCONNECTING MEANS IS READILY ACCESSIBLE. Check The Knowledge Multi-Wire A ____ branch circuit supplies two or more receptacles or outlets for lighting and appliances? You dont want a person standing in the transformer vent path to reach a fire extinguisher. (If these areas are accessible to other than pedestrian traffic, then one of the other conditions applies). If someone props the door open (for example, because the room is hot and they need to work in there), and the inswing door blocks the vent of a transformer, that transformer is more likely to overheat. 800A. 110.25 [Sec. Festoon Lighting B. B. The ampere rating of this disconnecting means may not be less than the nameplate current rating of the equipment. fire protection system.D. Vertical clearance of final spans above, or within 914 mm (3.0 ft) measured horizontally of, platforms, projections, or surfaces from which they might be reached shall be maintained in accordance with paragraph (c)(2) of this section. The branch circuit wiring method shall include or provide an equipment grounding conductor to which the grounding contacts of the receptacle or cord connector shall be connected. A heavy-duty lampholder shall have a rating of not less than 660 watts if of the admedium type and not less than 750 watts if of any other type; and. A luminaire that weighs more than ____ pounds shall be supported independently of the outlet box, unless the outlet box is listed and marked for the maximum weight to be supported. Multi-Outlet Assembly A. Label your diagram. However, receptacles of cord- and plug-connected arc welders may have ampere ratings not less than the minimum branch-circuit conductor ampacity. A ceiling receptacle installed is not readily accessible, and it must have a ground-fault interrupter (GFCI). Wiring components are considered accessible if, Accessible learning experience design and implementation, Has virtual functions and accessible non-virtual destructor, Examples of accessible instructional materials. It is a system in which exchange the information between two node or points., A: Delay skew is the difference between the propagation delay on the fastest and slowest pairs in a UTP, A: Although, What are Overcurrent Protection Devices? - Technical Articles - EE Power four-wire, three-phaseB. Nonconductive coatings on transformer enclosures must be removed to ensure electrical continuity, or the termination fittings must be designed to make such removal unnecessary [Sec. neutral ground strap Handles or levers of circuit breakers, and similar parts that may move suddenly in such a way that persons in the vicinity are likely to be injured by being struck by them, shall be guarded or isolated. Grounded Conductor Cont B. A wire, bus, screw, or similar suitable conductor is acceptable as a main bonding. These materials are provided by Mike Holt Enterprises in Leesburg, Fla. To view Code training materials offered by this company, visit www.mikeholt.com/code. in 305 mm (12 in.) 225.40 Wiring and Protection, Access to Overcurrent Protective Devices. LOCATED WITHIN A GROUNDED JUNCTION BOX. What can installation records be used to determine while servicing equipment?A. All rights reserved. https://www.facebook.com/ElectricalConstructionMaintenanceMagazine, https://www.linkedin.com/company/electrical-construction-maintenance/. patient care area.B. Branch Circuit Multi-wire Multi-wire circuit consists of one (or more) duplex receptacles, one or more multiple receptacles single or combination. A: Equipment Grounding Conductor (EGC) A conductive path that 's a component of a decent ground-fault, A: It's critical to ground-fault protection of equipment system functionality that the ground, A: A power cable is an electrical cable that is made up of one or more electrical conductors that are, A: Communication System : Location Dry A. Overcurrent devices shall be readily accessible to each employee or authorized building management personnel. A load having the maximum level of current sustained for three hours or more is referred to as a ____ load. These circuits exclude the connection of luminaires (lights) unless they are part of the appliance being connected. What components make up an ADT, exactly? communications system installation.C. Thus, you do not create a new branch circuit. Show FS boxes in Material PDF FS (Ferris Box Standard) FSS (Ferris Box Continuous), Continuous Load A load having the maximum level of current sustained for three hours or more is referred to as a continuous load. D. THE DISCONNECTING MEANS IS READILY ACCESSIBLE. Proper transformer selection is an important part of preventing transformers from overheating. The service disconnecting means shall plainly indicate whether it is in the open or closed position and shall be installed at a readily accessible location nearest the point of entrance of the service-entrance conductors. If you stick a fuse in a branch circuit, IMO, you have started a new branch circuit. Dont install a transformer below a water heater that is on a mezzanine or similar elevation. In Sight A. NEC defines in sight from, within, or within sight to the applied equipment and indicates that specified items or equipment is visible and not more than 50 Ft. apart. Exposed noncurrent-carrying metal parts of portable and mobile equipment shall be connected by an equipment grounding conductor to the point at which the system neutral impedance is grounded. Service Lateral A. "must" or "must note penalties for noncompliance" b. shall" or "shall not suggested but discretionary ANS: PTS: Electrical Code REF: The National 10. Where the neutral is not grounded on the load side of the circuit, the current transformer may link all three phase conductors and the grounded circuit conductor (neutral); and. 450.9]. But you can reduce or eliminate power quality problems by correcting grounding and bonding errors at the transformer or somewhere else (e.g., at the utilization equipment). Therefore, So a telephone occupies a circuit for, A: A circuit breaker is a kind of electrical switch which is used to protect an electrical circuit from, A: A power station is to provide electricity to a huge number of people. An intersystem bonding termination will typically be used as a ground junction for a/anA. The service point is the point of connection between the facilities of the serving utility and the premises wiring. 450.13(A) and (B): (A) Open Installations. "I have learned, in whatsoever STATE I am, therewi, http://www.usahardware.com/inet/shop/item/30550/icn/20-068163/bussman/bp_sru.htm. The grounded circuit (system) conductor is generally not permitted to be used to ground, A: Amotorcontrollerisadeviceorcombinationofdevices,thatcancontrolhowanelectricmotor, A: According to question we have to discuss about A service disconnection means must be installed, A: two types of signaling mode with a neat diagram, A: With industry input, the TIA/EIA cable standards have been developed by the Telecommunications, A: According to article 702 - Optional Standby System is permitted where the voltage between conductors does not exceed 300 if: The conductors do not pass above the roof overhang for a distance of more than 1.83 m (6.0 ft), 1.22 m (4.0 ft) horizontally, and. What would you'all say about the installation if this sort of receptacle were used: Thanks for the responses. A: The correct option along with the explanation is provided in the following section. 1. contiguous. Communications conductors alone -- no requirement. The grounding contacts of receptacles and cord connectors shall be grounded by connection to the equipment grounding conductor of the circuit supplying the receptacle or cord connector. 240.6(A)]. Over commercial areas subject to pedestrian traffic or to vehicular traffic other than truck traffic. 450.9 provides ventilation requirements, and Sec. Exposed noncurrent-carrying metal parts of cord- and plug-connected equipment that may become energized shall be grounded under any of the following conditions: If in hazardous (classified) locations (see 1910.307); If operated at over 150 volts to ground, except for guarded motors and metal frames of electrically heated appliances if the appliance frames are permanently and effectively insulated from ground; If the equipment is of the following types: Refrigerators, freezers, and air conditioners; Clothes-washing, clothes-drying, and dishwashing machines, sump pumps, and electric aquarium equipment; Hand-held motor-operated tools, stationary and fixed motor-operated tools, and light industrial motor-operated tools; Motor-operated appliances of the following types: hedge clippers, lawn mowers, snow blowers, and wet scrubbers; Cord- and plug-connected appliances used in damp or wet locations, or by employees standing on the ground or on metal floors or working inside of metal tanks or boilers; Portable and mobile X-ray and associated equipment; Tools likely to be used in wet and conductive locations; and. Readily Accessible | Mike Holt's Forum Rigid metal conduit (RMC) is a raceway of ____. That plug-in breaker thing is a piece of utilization equipment. Appliance Utilization equipment of a commonly built-in standard, installed as a unit such as AC, or a stove. Notwithstanding the provisions of paragraph (g)(6)(iv) of this section, exposed noncurrent-carrying metal parts of the following types of fixed equipment need not be grounded: Enclosures for switches or circuit breakers used for other than service equipment and accessible to qualified persons only; Electrically heated appliances that are permanently and effectively insulated from ground; Distribution apparatus, such as transformer and capacitor cases, mounted on wooden poles, at a height exceeding 2.44 m (8.0 ft) above ground or grade level; and. Example: Conductors connected to switches and receptacles are accessible by a removable plate or device. All 3-wire dc systems shall have their neutral conductor grounded; Two-wire dc systems operating at over 50 volts through 300 volts between conductors shall be grounded unless: They supply only industrial equipment in limited areas and are equipped with a ground detector; They are rectifier-derived from an ac system complying with paragraphs (g)(1)(iii), (g)(1)(iv), and (g)(1)(v) of this section; or. Hrone dans la guerre de 100 ans (100 years war). The conductor must be sized to accommodate the 70A primary overcurrent protection per Sec. Article 450 then takes you to the next logical step providing overcurrent protection and the proper connections. Where connected to a branch circuit having a rating in excess of 20 amperes, lampholders shall be of the heavy-duty type. Step 2: Determine the primary overcurrent protection rating [Sec. The standard ampere ratings for fuses include (s) _____. Cables entering or exiting conduit used for support or protection against physical damage require fittings on the conduit ends to prevent ____. Article 230.70 (A)(1) (1) Readily Accessible Location. For dc circuits only, the equipment grounding conductor may be run separately from the circuit conductors. Basically, ______receptacles are required to be installed if an equipment grounding conductor is available at the outlet where the receptacle is located. Cable installed under a building must be ____ unless the wiring method is Type MC or Type MI cable that is identified for direct burial. 240.6(A)], the next higher rating is permitted [Sec. Article 100 Electrical Code Definitions Understanding Code, Accessible Wiring components are considered accessible when access is gained without damaging the structure. Neutral disconnect link Note: Please do not handwritten. 18. Other land traversed by vehicles, including land used for cultivating or grazing and forests and orchards. The noncurrent-carrying metal parts of equipment and the equipment grounding conductor terminals of the receptacles are bonded to the generator frame. For each given ppp-series, identify ppp and determine whether the series converges. Use and identification of grounded and grounding conductors -, A nongrounding-type receptacle may be replaced with a ground-fault circuit-interrupter-type of receptacle that is marked "No Equipment Ground;" an equipment grounding conductor may not be connected from the ground-fault circuit-interrupter-type receptacle to any outlet supplied from the ground-fault circuit-interrupter receptacle; or. Based on the 2020 NEC. the light source only c. a complete lighting unit b. the lamp holder d. parts to position the light source ANS: PTS: Experts are tested by Chegg as specialists in their subject area.