Electrical Safety-Related WP Level 2 Practice Test

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• The NFPA 70E committee was formed to assist which organization in preparing electrical safety standards?
• One of the conditions where energized conductors and circuit parts operating at voltages equal to or greater than 50 volts shall be put into an electrically safe work condition before an employee performs work where the employee is within the ? boundary.
• What is the minimum arc rating (in cal/cm2) required for arc flash PPE Category 2 clothing?
• Which of the following best describes the scope of maintenance-related requirements in NFPA 70E?
• The distance associated with each shock protection approach boundary to exposed energized electrical conductors or circuit parts is determined by the nominal phase-to-phase system voltage range for ac systems and the nominal potential difference for dc systems.
• Which combination of hazards does Article 130 cover?
• ERMS options can be included with many new circuit breakers and can be retrofitted to existing installed circuit breakers.
• In NFPA 70E's risk control hierarchy, which risk control method is the most effective (lowest number)?
• The statement that MCCB, ICCBs, and LVPCBs all have the same 1.5 cycle typical fault clearing time is true.
• Which NFPA 70E code reference identifies the table used to determine protective clothing and PPE for arc flash within the arc flash boundary?
• If actual incident energy is higher than the calculated energy, PPE adequacy may be insufficient.
• Chapter 2 of NFPA 70E addresses safety-related what requirements?
• When fault currents increase due to changes in the facility or utility, what action should be taken regarding OCPDs?
• NFPA 70E's 130.5 incident energy analysis is associated with which concept?
• If equipment is not properly installed or maintained, PPE selection based on incident energy analysis or the PPE category method might not provide adequate protection from arc flash hazards.
• When energized conductors operating at voltages equal to or greater than 50 volts are not put into ESWC, and work is performed under 110.4, which two risk assessments must be performed?
• What was the published fault current in the incident energy calculation example?
• Maintenance of all electrical equipment that may be worked on when not in an electrically safe work condition is important for electrical safety.
• The first section of Article 130 states that all requirements apply whether a(n) ? analysis is completed or if Table 130.7(C)(15)(a), 130.7(C)(15)(b), and 130.7(C)(15)(c) are used in lieu of an incident energy analysis. What analysis is being substituted?
• Which boundary is the approach limit at which a shock hazard exists from an exposed energized conductor or circuit part?
• In many cases, the incident energy exposures at equipment of existing fusible systems can be reduced by upgrading which fuses to Class RK1 fuses?
• Hand protection used as arc flash protective equipment must meet arc flash protective equipment requirements.
• Which statement below is incorrect when a circuit has been deenergized by a circuit protective device operation due to an overcurrent condition?
• Which of the following are required by the 130.7(B) provisions addressing the care of protective equipment?
• Which edition of NFPA 70E supersedes all previous editions?
• True or False: Remote monitoring of electrical parameters can improve safe work practices by enabling proactive maintenance and safer troubleshooting.
• When an employee works in a confined or enclosed space where an electrical hazard exists, protective shields, protective barriers, or insulating materials must be ? as necessary to protect against electrical hazards.
• Table 130.7(C)(15)(a) is used to determine whether arc flash PPE is required. True or False?
• Care and maintenance of arc-rated clothing and arc flash suits involve several requirements.
• An energy-reducing maintenance switch (ERMS) function is available on some circuit breakers.
• Electrical safety is directly tied to what aspect of electrical power systems equipment according to NFPA 70E maintenance guidance?
• The most common incident energy analysis methods, including equations, are located in NFPA 70E nonmandatory Informative Annex D.
• NFPA 70E risk control hierarchy uses numbers where lower numbers indicate greater effectiveness. Which statement is true?
• Which trip type is intended for very high fault current conditions causing the circuit breaker to open without an intentional delay, with fixed or adjustable pickup?
• Which principle focuses on eliminating or minimizing electrical hazards before a worker is exposed?
• IEEE 1584 defines how many methods to calculate incident energy and AFB?
• Which statement about restricted boundary crossing is correct?
• Table 130.7(C)(15)(a) is used to determine PPE for AC equipment.
• Which statement regarding arc flash boundary is correct?
• If a worker is performing work on energized equipment with arc flash PPE and a protective device fails to operate, the incident energy exposure may be much higher than calculated.
• If a fault current is in the current-limiting range of a current-limiting OCPD, the fault current's magnitude and time duration are both increased, which increases the energy released by an arcing fault.
• Continuing fault current calculations to X3 is sometimes necessary to determine the available fault current parameter value for a 480-volt panelboard.
• NFPA 70E 225.3 requires a circuit breaker that has interrupted a fault approaching its interrupting rating to be ? in accordance with the manufacturer's instructions.
• What was the published circuit breaker clearing time in the incident energy calculation example?
• Determine which sets of topics are required to meet NFPA 70E requirements related to emergency response training.
• The statement 'This circuit breaker does not have an energy-reducing maintenance switch function' is true.
• Which document provides frequency of maintenance guidelines and sample forms for an Electrical Preventive Maintenance program?
• In fuse testing, which two specific fuse types are mentioned for contact points during testing?
• Electrical equipment in non-dwelling units that is likely to require examination, adjustment, servicing, or maintenance while energized must generally be field marked with a label. Which information must be contained on the label?
• NFPA 70E 225.3 requires a circuit breaker that has interrupted a fault approaching its interrupting rating to be inspected and tested.
• Head protection requirements must be considered in arc flash protective equipment planning.
• For ERMS-equipped circuit breakers, the ERMS current pickup can be adjusted by the dials.
• The objective of ERMS is to reduce arcing fault time duration.
• In arc flash PPE calculation, the fault clearing time parameter value is defined in Table 130.7(C)(15)(a).
• Table 130.7(C)(15)(a) is used to determine whether arc flash PPE is required.
• Which type of overcurrent protective device is described as an insulated-case circuit breaker or low voltage power circuit breaker?
• Arc-flash relays can be utilized to sound an alarm when an arcing fault occurs so the worker who is working on the energized equipment can gather his or her tools and get out of the arc flash boundary before being injured.
• Protective clothing care and maintenance requirements apply to arc-rated clothing and arc flash suits.
• Which device is described as a current-limiting device that rapidly interrupts fault current and reduces arc energy exposure?
• Which of the following is not a parameter that must be satisfied to use the arc flash PPE category method?
• When testing fuses, which measurement methods are acceptable?
• True or False: Upgrading protective devices to the RK1 family is intended to reduce incident energy exposure during fault conditions.
• What minimum voltage triggers the requirement to place conductors into an ESWC before work?
• Which NFPA 70E article is associated with Portable Electric Tools and Equipment?
• Electrical equipment in locations other than dwelling units that may require examination, adjustment, servicing, or maintenance while energized must be labeled with both the available incident energy and the minimum arc rating of clothing.
• Test instruments used on electrical systems must be rated for the circuits and equipment for which they are used.
• Which tools are recommended to reduce exposure when racking a circuit breaker?
• Which document provides maintenance guidelines and sample forms for electrical equipment maintenance?
• A qualified person is never permitted to cross the restricted approach boundary.
• The employer must document that each employee has received the training required by 110.6(A). This documentation of training must satisfy which criteria?
• Which of the following is not one of the standard five common overcurrent protection trip types?
• What term describes the state of electrical equipment considering manufacturers' instructions, recommendations, and applicable industry standards?
• The 2004 edition introduced the requirements for what, and the 2021 edition supersedes all previous editions?
• Test instruments and their accessories rated for circuits and equipment are required. UL 61010-1 addresses rating for voltage measurement equipment intended for use on electrical systems of what maximum voltage and below?
• Cutting, removing, or rerouting conductors is addressed in which NFPA 70E section?
• EBT is defined as the incident energy on a material that results in what probability of breakopen?
• Which of the following statements about the arc flash PPE category method is true?
• Which type of overcurrent protective device is described as a current-limiting fuse?
• Which statement correctly describes the risk control hierarchy in NFPA 70E in terms of effectiveness?
• In the described 480-VAC wall-mounted assembly, the main rating is 600 A and the branch rating is 125 A.
• The conditions of this application would permit using the arc flash PPE category method to determine the AFB and select arc flash PPE, based on the OCPD typical clearing times, assuming the protecting-OCPD and the 480-volt panelboard have been properly installed and maintained. See the definition for condition of maintenance in Article 100.
• Arc flash PPE Category 2 requires arc-rated clothing.
• Arc flash hazard is defined in Article 100 as a source of possible injury or damage to health associated with the release of energy caused by an electric arc.
• Which model is used in NFPA 70E informational notes to relate arc energy to skin burn injury?
• Which items are among the NFPA 70E requirements related to qualified person training?
• An energized electrical work permit must be completed as required by which section?
• 1. Article 130, Work Involving Electrical Hazards, by definition, covers work involving four hazards caused by either proximity or equipment failure.
• Identify which of the following statement(s) is/are true as they relate to unqualified persons.
• A poorly or improperly maintained OCPD can result in higher actual incident energy during an arc flash incident than determined by an incident energy analysis.
• The arc flash boundary shall be the distance at which the incident energy equals ?
• The table used to determine protective clothing and PPE for arc flash boundary based on the determined PPE category is Table 130.7(C)(15)(c). True?
• 130.9 deals with requirements for work within the limited approach boundary or arc flash boundary of overhead lines. True or False?
• Arc rating is defined in Article 100 and is expressed in what unit?
• An Electrical Worker can use data on a service sticker affixed to electrical equipment to determine if tested and inspected within the recommended maintenance frequency.
• In addition to other requirements, head protection must meet arc flash protective head protection requirements.
• A qualified person is defined as someone who has demonstrated skills and knowledge related to the construction and operation of electrical equipment and installations and has safety training to identify the hazards and reduce the associated risk. Which two terms complete the phrase describing the required scope?
• According to the Informational Note referencing the Stoll model, onset of a second-degree burn on unprotected skin is likely to occur at an exposure of 1.2 cal/cm2 for 1 second.
• In the given scenario, if the protecting circuit breaker opened in 1 second, what would be the approximate actual incident energy at 18 inches?
• Which of the following is true about who may perform voltage measuring tasks on electrical equipment with an electrical hazard?
• Arc flash protection is influenced by both PPE selection and equipment maintenance; if equipment is poorly maintained, PPE effectiveness may be limited.
• Which word completes the sentence: training to identify the hazards and reduce the associated risk?
• In a clean and dry environment, cleaning is more frequently required than in a humid dusty environment.
• The extended‑length racking tool allows the worker to be moved away from the potential arcing fault source or outside which boundary?
• The shock protection approach boundary distances are the distances from exposed energized electrical conductors or circuit parts to the employee.
• Brackets containing section references to another NFPA document are for informational purposes only and are provided as a guide to indicate the source of the extracted text.
• NFPA 70E Chapter 2 addresses Safety-Related ? Requirements, and Chapter 3 addresses Safety Requirements for ? Equipment.
• Maintenance in NFPA 70E is intended for preserving or restoring the condition of electrical power systems equipment or devices.
• Which factor is used to determine the AFB in arc flash PPE category method?
• After a circuit breaker interrupts a fault, it might not be suitable for further service.
• Overcurrent protective device selection decisions for new systems and for existing system upgrades always affect arc flash hazards.
• The arc flash PPE category method applies to assets such as 480-volt panelboards.
• The NFPA 70E informational note to Table 130.7(C)(15)(a) lists the typical fault clearing time for insulated case circuit breakers as 'none of the above'.
• For the 480-volt panelboard, the available fault current parameter value is specified in Table 130.7(C)(15)(a).
• Which of the following is NOT included in the scope of the 2021 NFPA 70E?
• An unqualified person is never permitted to cross the restricted approach boundary.
• For a task on a fixed circuit part at 480 V nominal, what is the correct limited approach boundary distance?
• NFPA 70E 205.4 requires maintenance, tests, and inspections to be what?
• When adding or replacing a circuit breaker in a panel, it is imperative that the breaker is suitable for that panel and has proper I, II, and III and equivalent short‑circuit performance. Which option best captures this requirement?
• Which boundary is central to arc‑flash hazard assessment in electrical work?
• Is it required to maintain protective devices so they can withstand and interrupt available fault current?
• Energy-reducing maintenance switching (ERMS) reduces arcing fault time duration.
• ERMS stands for Energy-Reducing Maintenance Switching.
• Which statement best describes the purpose of selecting overcurrent protective devices with respect to arc flash?
• What energy threshold defines the Arc Flash Boundary expressed in cal/cm2 (and its SI equivalent)?
• Maintenance condition is an important electrical safety consideration only for overcurrent protective devices.
• An electrical hazard can result in which injuries?
• When using the arc flash PPE category method, the worker must maintain a working distance less than the working distance parameter value for the type of equipment to be worked on.
• When conducting an arc flash risk assessment in accordance with 130.5, the 'condition of maintenance' is not a consideration.
• If energized conductors and circuit parts operating at voltages equal to or greater than 50 volts are not put into an electrically safe work condition, and work is performed as permitted under 110.4, which risk assessments must be performed?
• The electrical safety training requirements in 110.6(A) specify employees must be trained in several topics. Which combination is among those topics?
• Which NFPA 70E chapter addresses Safety-Related Work Practices?
• When an arc flash hazard exists, which boundary is defined as the distance from the arc source at which the incident energy equals 1.2 cal/cm2 (5 J/cm2)?
• After a fault is interrupted near the interrupting rating, what is the correct maintenance action according to the cited standard?
• Finger-safe products may reduce the likelihood of an electrical shock hazard. Some component products with finger-safe IP20 claims have a conditional IP20 rating that depends on proper preparation and installation of conductors.
• The arc flash PPE category can be determined through an incident energy analysis.
• ERMS options can be included with many new circuit breakers and are available to retrofit existing installed circuit breakers.
• The NFPA 70E informational Note provides typical fault clearing times for which devices?
• NFPA 70E Article 205 addresses General ? Requirements.
• The conditions of this application would permit using the arc flash PPE category method to determine the AFB and select arc flash PPE based on the OCPD typical clearing times, assuming the protecting-OCPD and the 480-volt panelboard have been properly installed and maintained.
• Which of the following are considerations related to the incident energy analysis method?
• Which NFPA 70E article must be satisfied before conductors and circuit parts are considered in an electrically safe work condition?
• Which statement best reflects maintenance scheduling for electrical equipment?
• When using IEEE 1584 Guide for Performing Arc-Flash Hazard Calculations for the incident energy analysis method, available fault currents should be calculated for all the various scenarios, such as different switch scenarios and motors running and not running scenarios.
• The arc flash PPE category method uses the AFB to determine PPE selection.
• Which statement best reflects the role of job safety planning in NFPA 70E?
• When using the arc flash PPE category method (for AC systems), the estimated available fault current at the equipment to be worked on must be equal to or less than the available fault current parameter value for the type of equipment in Table 130.7(C)(15)(a).
• During fuse testing, test probes should contact which parts of the fuses?
• GFCI protection devices shall be tested ?.
• GFCI protection devices are required in locations where workers may contact water or conductive liquids.
• The limited approach boundary distance for a task involving a fixed circuit part operating at 480 volts, nominal, is ?
• When using the arc flash PPE category method for AC systems, the fault clearing time has to be greater than the fault clearing time parameter value for the type of equipment to be worked on.
• True or False: Neglecting maintenance can lead to higher arc flash energy than predicted.
• Which NFPA 70E boundary is designated as the closest approach to energized parts that still requires de-energization before work at voltages 50 V and above?
• Which distance is used to determine the limited approach boundary for an overhead line conductor at 480 V nominal?
• When the ERMS option is switched on, loads on the protected circuit automatically enter energy-saving mode.
• Energized work is generally prohibited. Such work is permitted under which condition?
• Which concepts were included in the 1995 edition of NFPA 70E?
• NFPA 70E mandates that the employer's electrical safety program include consideration for condition of maintenance of electrical equipment and systems.
• The arc flash hazard severity is directly dependent on the upstream OCPD, the protecting OCPD that protects downstream equipment.
• Which type of overcurrent protective device is described as a molded case circuit breaker?
• The panelboard, with an unknown X3 available fault current at its line terminals, is being investigated to determine if the arc flash PPE category method can be used. A fault current calculation determines the available fault current at the service transformer secondary X1 to be as shown. Is it necessary to continue doing the fault current calculations to X3 in order to determine whether the available fault current parameter value in Table 130.7(C)(15)(a) for a 480-volt panelboard is satisfied?
• Energized work is generally prohibited. Such work is permitted under which of the following conditions?
• What was the system voltage in the incident energy calculation example?
• Who shall implement and document an overall electrical safety program that directs activity appropriate to the risk associated with electrical hazards?
• The conditions of this application would permit using the arc flash PPE category method to determine the AFB and select arc flash PPE, based on the OCPD typical clearing times, assuming the protecting-OCPD and the 480-volt panelboard have been properly installed and maintained. See the definition for condition of maintenance in Article 100.
• Which boundary is defined as the limit within which a shock hazard exists due to proximity to an energized part?
• Incident energy is defined as the thermal energy impressed on a surface at a distance from the arc source during an electrical arc event. Which statement best defines incident energy?
• What is the primary safety outcome described when using extended‑length racking tools?
• When arc-rated clothing is worn to protect an employee, it shall cover all which type of clothing?
• Which table provides the available fault current parameter value for a 480-volt panelboard under arc flash PPE category method?
• NFPA 70E informational Note to Table 130.7(C)(15)(a) states that molded case circuit breakers have a typical fault clearing time of 3 cycles with an instantaneous integral trip. True or False?
• 130.7(D) addresses which protective equipment category?
• Protective equipment must conform to applicable state, federal, or local codes and standards.
• Incident energy level (cal/cm2) is the basis for determining arc flash PPE categories.
• ERMS is an option for circuit breakers with electronic trip units and some fused switches.
• NFPA 70E informational Note to Table 130.7(C)(15)(a) indicates the typical fault clearing time for current-limiting fuses as 0.5 cycles when the fault current is within the current-limiting range.
• Which is not one of the three IEEE 1584 methods to calculate incident energy and AFB?
• The scope of the 2021 NFPA 70E includes: I. Installation requirements II. Safety related maintenance practices III. Safety related work practices IV. Other administrative controls.
• A 480-VAC wall-mounted assembly with a main MCCB and branch MCCBs, rated 600 A for the main and 125 A for the branches, is a panelboard.
• For an existing electrical system, is it permissible to apply safety-related design concepts to reduce hazards?
• IP20 finger-safe ratings can be conditional, requiring proper preparation to achieve the rating.
• Which factor must be considered to ensure compatibility of a breaker with a panel?
• For energized tasks on equipment rated greater than 240 volts up to 600 volts, arc flash PPE is required.
• Which statement is true about the relationship between calculated incident energy and actual incident energy?
• Electrical conductors and circuit parts shall not be considered to be in an electrically safe work condition until all of the requirements of Article ? have been met.
• Using an extended‑length racking tool or remote‑operated racking tool during circuit breaker racking primarily provides which safety benefit?
• Informative Annex H is titled 'Requirements for the Selection of Protective Clothing and Other Personal Protective Equipment'.
• Under fault conditions, current-limiting fuses can limit the let-through current and clear the fault in 1/2 cycle or less. The combination of decreased clearing times and reduced arcing current can greatly reduce incident energy when arcing current is within the current-limiting range. True or False?
• An unqualified person is defined as a person who is not a qualified person.
• When selecting a circuit breaker for a panel, you must verify suitability for the panel and what else?
• True or False: For an existing electrical system, no safety-related design concepts can be implemented to eliminate or mitigate electrical hazards.
• Before starting each job involving exposure to electrical hazards, which person must complete a job safety plan and conduct a job briefing with the employees involved?
• Under NFPA 70E, only qualified persons are permitted to perform tasks such as testing, troubleshooting, and voltage measuring on electrical equipment under what condition?
• If a circuit breaker has not been operated in normal service, a periodic open-close exercise should be planned.
• The requirements of ? shall apply when the arc flash PPE category method is used for the selection of arc flash PPE.
• The informational note to 130.7(A) informs that, even when protection is selected in accordance with the PPE requirements of 130.7, some situations could result in burns to the skin, although burn injury should be ?
• Which topic is addressed by the 130.7(B) provisions?
• What are the two methods stated in NFPA 70E 130.5 for determining the proper arc flash PPE?
• Which standard contains the 225.3 requirement discussed in this material?
• Which statement best describes the term exposed movable conductor?
• An energized electrical work permit is generally required when working within which boundaries?
• There are five common overcurrent protection trip types for circuit breakers. Which type is intended for overcurrents that can persist for many seconds to minutes and is considered overload and low-level fault protection?
• The arc flash boundary is related to minimizing exposure to arc flash hazards. This statement is:
• Which set of category numbers is NOT identified as part of the precautions for personnel activities?
• The severity of the arc flash hazard during an arc flash event is directly dependent on the upstream OCPD, the 'protecting OCPD,' that is protecting the downstream equipment.
• Which trip type is a newer feature intended to reduce incident energy exposure during arcing faults and can be activated remotely or at the faceplate?
• Chapter 3 supplements or modifies Chapter 1 with safety requirements for what?
• Coverage is a factor in selecting protective clothing.
• Working where electrical hazards exist is prohibited while alertness is recognizably impaired.
• ATPV is defined as the incident energy on a material that results in what probability of a second-degree burn according to the Stoll curve?
• NFPA 70E Article 245 addresses Portable Electric Tools and Equipment.
• Personal protective equipment (PPE), such as arc flash protective equipment, shock protection, and head, face, eye, and hearing protection, is covered in 130.7(C). Which protective equipment, such as insulated tools, protective shields, and rubber insulating equipment used for protection from unintentional contact, is covered in 130.7(D)?
• The limited approach boundary distance for an overhead line conductor operating at 480 volts, nominal, is ?
• Maintenance guidelines for electrical systems can include which approach related to the environment?
• Which statement is incorrect?
• In the IEEE study, if the closest upstream circuit breaker did not operate and the next higher upstream OCPD cleared the arcing fault, in approximately what fraction of cases would the worker lack adequate arc-rated PPE?
• When performing arc flash calculations using IEEE 1584, the incident energy analysis method requires calculating available fault currents for multiple scenarios, including different switch states and motors running and not running.
• NFPA 70E, Chapter 2 covers which general subject matter?
• Whenever system changes occur in a premise or changes by the utility that might increase the available fault currents, the existing OCPDs must be reevaluated to determine whether they have a sufficient interrupting rating.
• The electrical safety program must identify the ? upon which it is based, the ? by which it is measured and monitored, and the ? to be utilized before work is started by employees exposed to an electrical hazard.
• Alerting techniques are located in NFPA 70E and are a form of protective equipment. Which categories apply to alerting techniques?
• Who shall be permitted to work on electrical conductors or circuit parts that have not been put into an electrically safe work condition?
• When ERMS is enabled, loads on the protected circuit are in energy-efficiency mode and energy savings occur.
• The overcurrent protective devices used in panelboards are only LVPCBs or fuses/switches.
• What is the primary purpose of using Tables 130.7(C)(15)(a)-(c) in arc flash analysis?
• In arc flash risk assessment, the condition of maintenance is a consideration.
• An NFPA 70E compliant electrical safety program must include a risk assessment procedure that addresses the potential for human error and its negative consequences on which areas?
• ? parts of the body inside the arc flash boundary shall be protected. When arc-rated clothing is worn to protect an employee, it shall cover all ? clothing.
• Informational Note No. 2 located after Table 130.5(C) provides the rationale that improper or inadequate maintenance may result in the protecting-OCPD taking longer to clear the fault current than its published clearing time.
• NFPA 70E 225.3 requires a circuit breaker that has interrupted a fault approaching its interrupting rating to be what?
• Work within the arc flash boundary of overhead lines requires compliance with which categories of requirements?
• Explanatory material is included in informational notes and is enforceable as requirements.
• NFPA 70E Article 250 addresses Personal Safety and Protective Equipment.
• An energized electrical work permit is generally required when working within the limited approach boundary or the arc flash boundary of exposed energized electrical conductors or circuit parts that are not placed in an electrically safe work condition. Which boundary(s) are covered by this requirement?
• With the energy-reducing maintenance switch (ERMS) on, if an arcing fault current is above the ERMS pickup, the circuit breaker trips without intentional delay.
• AFB stands for which term in arc flash terminology?
• Which of the following is a component of an arc flash risk assessment used to predict the incident energy of an arc flash for a specified set of conditions?
• Portable electric equipment used in highly conductive work locations shall be approved for those locations. In job locations where employees are likely to contact or be drenched with water or conductive liquids, what shall also be used?
• The requirement in NFPA 70E 225.3 should be performed in accordance with whose instructions?
• NFPA 70E requires protective equipment as necessary and that it conforms to applicable codes and standards.
• Which of the following are identified as categories of requirements related to precautions for personnel activities?
• The remote monitoring of voltage, current, or other measurements on a control panel provides safe work practice benefits for maintenance workers.
• Before cutting or drilling into equipment where energized lines or parts may be contacted, the employer shall perform a risk assessment to
• A shock risk assessment is required to be performed for which of the following reasons?
• Which device is typically used for high interrupt ratings and often housed in a rigid insulating enclosure?
• Which source provides the OCPD typical clearing times used as a parameter in the arc flash PPE category method?
• If fault current is within the current-limiting range, what happens to arcing current and incident energy?
• Which boundary is closer to the energized conductor: Restricted Approach Boundary or Limited Approach Boundary?
• Outer-layer garments worn over arc-rated clothing must also be arc-rated.
• At voltages equal to or greater than 50 volts, energized conductors must be placed into an electrically safe work condition before any work if the worker is within which boundary?
• Arc flash PPE Category 2 corresponds to which incident energy value?
• When a reasonable possibility exists of contacting electrical lines during excavation, what shall be used?
• NFPA 70E Annex D provides information on various calculation methods to determine the AFB and incident energy.
• The term exposed movable conductor is normally applied to overhead line conductors supported by poles.
• The energy released by an arcing fault is directly related to which factors?
• NFPA 70E Informative Annex M is titled Layering of Protective Clothing and Total System Arc Rating.
• Energized tasks on equipment rated 240 to 600 V require arc flash PPE and are determined using the specified table.
• The condition of maintenance is defined in Article 100.
• NFPA 70E Informative Annex O does not include which concept?
• What distance was used in the incident energy calculation example?
• Incident energy is typically expressed in which unit?
• Which location is not a suitable within-sight motor disconnecting means per NEC 430.102?
• Maintenance in NFPA 70E is intended for preserving or restoring the condition of electrical power systems equipment or devices for ? . Electrical safety is directly tied to the ? of electrical power systems equipment.
• Which article addresses Work Involving Electrical Hazards?
• Tables 130.7(C)(15)(a), (b), and (c) may be used in lieu of an incident energy analysis. What analysis do these tables replace?
• Determination of an arc flash PPE category for DC systems is determined from Table 130.7(C)(15)(a).