Electrical metallic tubing must not be ____. That plug-in breaker thing is a piece of utilization equipment. Both the equipment grounding conductor and the grounding electrode conductor shall be connected to the grounded circuit conductor on the supply side of the service disconnecting means or on the supply side of the system disconnecting means or overcurrent devices if the system is separately derived. A conductor used as an equipment grounding conductor shall be identifiable and distinguishable from all other conductors. Texas Electrical Code 2020 > 2 Wiring and Protection > 225 Outside Branch Circuits and Feeders . Tests performed as required in paragraph (b)(3)(ii)(C) of this section shall be recorded. 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. A. Branch Circuit Multi-wire C. Each multi-wire branch circuit must be provided with a means that will simultaneously disconnects all ungrounded (hot) conductors at the point where branch circuits originate. A nongrounding-type receptacle may be replaced with a grounding-type receptacle where supplied through a ground-fault circuit-interrupter; the replacement receptacle shall be marked "GFCI Protected" and "No Equipment Ground;" an equipment grounding conductor may not be connected to such grounding-type receptacles. Service Equipment ?Overcurrent Protection: 230.91 Location Illustrated Guide to the National Electrical, Lesson 301 - Practical Guide to OSHA and NFPA, Bruce H. Edwards, Larson, Robert P. Hostetler. 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. 240.6(A)], the next higher rating is permitted [Sec. LOCATED WITHIN A GROUNDED JUNCTION BOX. Other land traversed by vehicles, including land used for cultivating or grazing and forests and orchards. Reference 422.11(A). The maximum number of conductors applies only if the box does not contain any ____. Rigid metal conduit (RMC) is a raceway of ____. three-wire, three-phaseD. This can be outside the structure. conducting. This type of protection is not required to be readily accessible as are branch circuit devices. A circuit breaker with a slash rating, such as 120/240 V or 480Y/277 V, may only be installed in a circuit where the nominal voltage of any conductor to ground does not exceed the lower of the two values of the circuit breaker's voltage rating and the nominal voltage between any two conductors does not exceed the higher value of the circuit breaker's voltage rating. To catch up on Lorenzo Mari's series on Overcurrent Protection, please visit: National Electrical Code Basics: Overcurrent Protection Part 1 . Neutral Conductor or Point A. Overcurrent devices do not have to be readily accessible if ____. Draw clearly, neatly, and properly the Circuit Schematic Diagram for a SINGLE BUSBAR SYSTEM with BUS SECTIONALIZATION. Bonding means that everything is connected or conductivity of the electron through wires. Cable installed under a building must be ____ unless the wiring method is Type MC or Type MI cable that is identified for direct burial. See 210. You will have to check the listing of the fuse and fuse holder. 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. "I have learned, in whatsoever STATE I am, therewi, http://www.usahardware.com/inet/shop/item/30550/icn/20-068163/bussman/bp_sru.htm. Basically, ______receptacles are required to be installed if an equipment grounding conductor is available at the outlet where the receptacle is located. Article 100 Electrical Code Definitions Understanding Code Accessible 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. Readily accessible We recently had a spirited discussion on the job about the term "readily accessible" and what that really means in the NEC. However, receptacles of cord- and plug-connected arc welders may have ampere ratings not less than the minimum branch-circuit conductor ampacity. An ____ is the organization, office, or individual responsible for enforcing the requirements of a code. Article 450 of the National Electrical Code (NEC) opens by saying, This article covers the installation of all transformers. Then it lists eight exceptions. Conductors and equipment shall be protected from overcurrent in accordance with their ability to safely conduct current. The system complies with all other provisions of paragraph (g) of this section. Location Wet A. If you stick a fuse in a branch circuit, IMO, you have started a new branch circuit. = Accessible equipment is equipment not guarded by locked doors, elevators, or other effective means (ARTICLE 100) = Overcurrent devices do not have to be readily accessible, if located adjacent to the equipment, where access is achieved by the use of portable means [ladder] (ARTICLE 240.24(A)(4) An AFCI is basically like a GFCI but it will protect the entire circuit from the breaker and back. Prior to the 2017 NEC, "overcurrent devices" were required to be readily accessible. This record shall be kept by means of logs, color coding, or other effective means and shall be maintained until replaced by a more current record. This prevents the equipment from being readily accessible to people in general and is a good safety measure. Over public streets, alleys, roads, and driveways. tribale maximize ANS: PTS: REF: Definitions 5 A contact device installed at an outlet for the connection of an attachment plug is an) rumpor und Sutlet canale ANS: PTS: REF: Definitions 6. All 125-volt, single-phase, 15- and 20-ampere receptacles installed in bathrooms or on rooftops shall have ground-fault circuit-interrupter protection for personnel. Where the ground-fault circuit-interrupter protection required by paragraph (b)(3)(ii)(B) of this section is not available for receptacles other than 125-volt, single-phase, 15-, 20-, and 30-ampere, the employer shall establish and implement an assured equipment grounding conductor program covering cord sets, receptacles that are not a part of the building or structure, and equipment connected by cord and plug that are available for use or used by employees on those receptacles. Thus, you do not create a new branch circuit. 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. LOCATED ADJACENT TO THE EQUIPMENT WHERE ACCESS IS ACHIEVED BY THE USE OF PORTABLE MEANS. I = VA (E 1.732) I = 45,000VA (480V 1.732) I = 54A. Check The Knowledge False Not readily accessible means you dont have to worry about it at all or ever have to service it? 800A. Main panel, Branch Circuit Multi-wire E. There must be only one grounded neutral conductor, and there must be an equal voltage between it and each undergrounded conductor of the circuit. The continuity of the equipment grounding conductor shall be continuously monitored so as to deenergize automatically the high voltage feeder to the portable equipment upon loss of continuity of the equipment grounding conductor. neutral disconnect link, 18. 240.6(A) and Table 450.3(B) Note 1]. Each service disconnecting means shall simultaneously disconnect all ungrounded conductors. Selective coordination Service Drop A. Stumped by the Code? According to Note 1 of Table 450.3(B), transformers having a primary current rating of 9A or more are permitted to use the next size up rule when 125% of the primary current doesnt correspond to the standard rating of a fuse or nonadjustable circuit breaker listed in Sec. A fixed or portable optional standby systems, A: Choose the correct option 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. If a delta-connected high voltage system is used to supply the equipment, a system neutral shall be derived. Raceway fill calculations are a prerequisite in ____ needed for particular circuits. communications system installation.C. Code Change Summary: Revised code language on the accessibility requirements for overcurrent devices. 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. As shown in Figure 5, the electrical . Selecting the next higher standard size overcurrent protective device is NOT allowed. A) located within a grounded junction box B) the disconnecting means is readily accessible C) the total load of the adjacent circuit does not exceed local standards D) located adjacent to the equipment where access is achieved by the use of portable means Overcurrent protection for transformers not over 1,000V. C. THE TOTAL LOAD OF THE ADJACENT CIRCUIT DOES NOT EXCEED LOCAL STANDARDS. a. Type AC cable must have a bending radius at least ____ times the diameter of the cable. A receptacle outlet shall be installed wherever flexible cords with attachment plugs are used. A(n) ____ is an accessory, such as a locknut or bushing, whose function is primarily mechanical, rather than electrical, in nature. Courtesy ofwww.MikeHolt.com. 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. National Electrical Code Basics: Overcurrent Protection Part 5 B. These circuits exclude the connection of luminaires (lights) unless they are part of the appliance being connected. Where connected to a branch circuit supplying two or more receptacles or outlets, receptacle ratings shall conform to the values listed in Table S-5; or, where larger than 50 amperes, the receptacle rating may not be less than the branch-circuit rating. The following additional requirements apply to feeders only: Conductors tapped to a feeder may be protected by the feeder overcurrent device where that overcurrent device also protects the tap conductor. 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. The biggest hang up we had was the use of the word "obstacle." Cable tester detects the, A: Materials that allow current to flow through them are called conductors. "must" or "must note penalties for noncompliance" b. shall" or "shall not suggested but discretionary ANS: PTS: Electrical Code REF: The National 10. . For dc circuits only, the equipment grounding conductor may be run separately from the circuit conductors. Raceway containing branch circuit conductors in concrete, Conduit Body A conduit body is a separate portion of a conduit (tubing) system providing access to the interior of the system through a removable cover at a junction. Ducts used to transport dust, loose stock, or flammable vapors shall not contain ____ of any type. A fuse is an electrical gadget used to shield the circuit from overcurrent. This tab has been removed to allow separate feeds of each outlet. Service equipment is that equipment (circuit breaker), switches, fuses, and other that is necessary to constitute the main control and cutoff that is connected to the load end of the service conductors. However, conductors that run above the top level of a window may be less than 914 mm (3.0 ft) from the window. Overcurrent devices do not have to be readily accessible if located within anded jacobs k. the connecting means is readily accessible the total of the conceitdees of wood local andards Located at the equipmenl where excess is achieved by the we of poetic ANS: PTS: REF: Definitions 3. IMO, if you stick a fuse within a cord, and plug that cord into a receptacle outlet, you are outside the premises wiring system. luminaire. above the floor or working platform, unless one of the following applies: Grounding-type receptacles shall be installed only on circuits of the voltage class and current for which they are rated, except as provided in Table S-4 and Table S-5. The ampere rating of this disconnecting means may not be less than the nameplate current rating of the equipment. So you cannot plug this appliance into a receptacle outlet that is fed from a 20 amp branch circuit, because their is a protective limit marked on the appliance. 450.9 provides ventilation requirements, and Sec. PPSX National Electrical Code 2004 - Quia Step back from the transformer installation task itself, and look at the context that is, see the forest and not just the tree you are working on. According to the definition of a branch circuit, it starts at the final overcurrent protection device. 450.10(A)]. IMO 422.11 (E) 3 permits him to do this WITHOUT the fuse. Transformers having a secondary voltage not exceeding 1,000V, with primary overcurrent protection only, must have the primary overcurrent protective device sized per the percentages shown in Table 450.3(B) and the percentages mentioned in its applicable notes [Sec. The service lateral is the underground conductors between the utility electric supply system and the service point. If that is right, then the in-line fuse (whether or not rated as a branch circuit OCPD) does not establish the beginning of a branch circuit, and the wires upstream (i.e., up to the receptacle, and from the receptacle back to the panel) have not been re-designated as a feeder. Meaning that if you had to get a ladder to reset this breaker, its considered accessible equipment as long as its not blocked. This program shall comply with the following requirements: A written description of the program, including the specific procedures adopted by the employer, shall be available at the jobsite for inspection and copying by the Assistant Secretary of Labor and any affected employee; The employer shall designate one or more competent persons to implement the program; Each cord set, attachment cap, plug, and receptacle of cord sets, and any equipment connected by cord and plug, except cord sets and receptacles which are fixed and not exposed to damage, shall be visually inspected before each day's use for external defects, such as deformed or missing pins or insulation damage, and for indications of possible internal damage. Nonmetallic-sheathed cable not fastened to the box must be secured within ____ in. A: According to the question, we need to explain the types of cables for data communication. 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 : NEC identifies ____ types of rigid PVC conduit. Over residential property and driveways. Overcurrent devices do not have to be readily accessible if ____. National Firefighters Association (NFA) Underwriter's Laboratory (UL) National Fire Protection Association (NFPA) 1 ANS: PTS: Electrical Code REF: The National 9. Notice the bonding jumper must be made of copper or other corrosion-resistant material. If the door is an inswing type, ensure the opened door will not block the transformer vent. . 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. Bushes in front electrical components that come under the code of readily accessible must be cut down. 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. A readily accessible disconnecting means shall be provided by which each heating equipment can be isolated from its supply circuit. Enclosures are guarded against employee contact. Service Equipment A. - Receptacle Ratings for Various Size Circuits. It may be tempting for some people to use that room as a storage area.
overcurrent devices do not have to be readily accessible if