NFPA 70E Shock Hazard Analysis
63 flashcards covering NFPA 70E Shock Hazard Analysis for the OSHA Electrical Safety / NFPA 70E section.
NFPA 70E Shock Hazard Analysis focuses on assessing the risks of electrical shocks in workplaces, including evaluating voltage levels, approach boundaries, and necessary personal protective equipment. This topic is defined by the National Fire Protection Association (NFPA) in their standard NFPA 70E, which OSHA incorporates into regulations for construction and general industry to prevent injuries from electrical hazards.
On OSHA Outreach Training exams, this material typically appears as multiple-choice or scenario-based questions that require identifying correct hazard assessment steps, such as calculating limited approach distances or selecting PPE based on fault current. A common trap is overlooking the need to consider environmental factors like wet conditions, which can alter shock risks and lead to incorrect safety decisions.
Always double-check equipment de-energization before beginning analysis to avoid unexpected hazards.
Terms (63)
- 01
Under NFPA 70E, what is required before starting work on energized electrical conductors?
An electrical hazard analysis, including a shock hazard analysis, must be performed to identify hazards and determine risk (NFPA 70E, Article 130.5).
- 02
What does a shock hazard analysis under NFPA 70E aim to determine?
The voltage to which personnel will be exposed, the boundaries, and the personal protective equipment needed (NFPA 70E, Article 130.3).
- 03
Under NFPA 70E, how is the shock hazard analysis related to energized work?
It must be conducted to establish approach boundaries and required PPE before any work on or near exposed energized parts (NFPA 70E, Article 130.4).
- 04
What factors must be evaluated in a shock hazard analysis per NFPA 70E?
Voltage, fault current, and other conditions that could affect the risk of shock, to determine safe work practices (NFPA 70E, Article 130.3).
- 05
Under NFPA 70E, who is responsible for performing a shock hazard analysis?
A qualified person must perform it as part of the electrical safety program (NFPA 70E, Article 110.5).
- 06
In NFPA 70E, what is the purpose of determining approach boundaries during shock hazard analysis?
To establish safe distances from exposed energized parts to prevent shock hazards (NFPA 70E, Article 130.4).
- 07
Under NFPA 70E, what must be included in a shock hazard analysis for arc flash hazards?
While primarily for shock, it may be combined with arc flash analysis to assess overall electrical risks (NFPA 70E, Article 130.5).
- 08
What is the role of PPE in a shock hazard analysis according to NFPA 70E?
PPE must be selected based on the analysis to protect against the determined shock hazards (NFPA 70E, Article 130.7).
- 09
Under NFPA 70E, when is a shock hazard analysis not required?
It is not required if the electrical equipment is de-energized and verified, but must be done for energized work (NFPA 70E, Article 130.2).
- 10
How does NFPA 70E define the limited approach boundary in shock hazard analysis?
As the closest distance to exposed energized parts that unqualified persons may approach without additional safeguards (NFPA 70E, Article 130.4).
- 11
Under NFPA 70E, what steps are involved in conducting a shock hazard analysis?
Identify the voltage, assess the environment, determine boundaries, and select controls, as outlined in the standard (NFPA 70E, Article 130.5).
- 12
What must a worker do if a shock hazard is identified during analysis per NFPA 70E?
Implement controls such as barriers or PPE to mitigate the hazard before proceeding (NFPA 70E, Article 130.6).
- 13
In a scenario where equipment is energized, what analysis is needed under NFPA 70E?
A shock hazard analysis to determine safe distances and required protections (NFPA 70E, Article 130.3).
- 14
Under NFPA 70E, how often should shock hazard analysis be reviewed?
It should be reviewed whenever changes occur that could affect the hazards, such as equipment modifications (NFPA 70E, Article 130.5).
- 15
What is the first step in performing a shock hazard analysis per NFPA 70E?
Identify all exposed live parts and their voltages to assess potential shock risks (NFPA 70E, Article 130.5).
- 16
Under NFPA 70E, what documentation is required for shock hazard analysis?
Written records of the analysis, including boundaries and controls, must be maintained (NFPA 70E, Article 130.5).
- 17
In a workplace scenario with high-voltage equipment, what must be done under NFPA 70E?
Conduct a shock hazard analysis to establish appropriate boundaries and PPE (NFPA 70E, Article 130.4).
- 18
What does NFPA 70E require for shock protection when working near live parts?
Use of insulated tools and barriers as determined by the shock hazard analysis (NFPA 70E, Article 130.7).
- 19
Under NFPA 70E, how is shock risk assessed in hazard analysis?
By evaluating the likelihood and severity of electrical contact, leading to appropriate controls (NFPA 70E, Article 130.3).
- 20
What is a key outcome of shock hazard analysis per NFPA 70E?
Determination of the restricted approach boundary for qualified workers (NFPA 70E, Article 130.4).
- 21
Under NFPA 70E, what training is needed for those performing shock hazard analysis?
Qualified persons must have training on hazard recognition and analysis methods (NFPA 70E, Article 110.2).
- 22
In a scenario involving maintenance on energized circuits, what is required under NFPA 70E?
A shock hazard analysis to ensure workers are protected from potential exposure (NFPA 70E, Article 130.5).
- 23
What controls must be in place after a shock hazard analysis per NFPA 70E?
Engineering controls, safe work practices, and PPE as specified in the analysis (NFPA 70E, Article 130.6).
- 24
Under NFPA 70E, how are shock hazards mitigated based on analysis?
By establishing and enforcing approach boundaries and using appropriate safeguards (NFPA 70E, Article 130.4).
- 25
What is the definition of a qualified person in the context of NFPA 70E shock hazard analysis?
A person who has demonstrated skills and knowledge to perform the specific work safely (NFPA 70E, Article 100).
- 26
Under NFPA 70E, what must be verified before entering the limited approach boundary?
That the shock hazard analysis has been completed and controls are in place (NFPA 70E, Article 130.4).
- 27
In a situation with wet conditions, how does NFPA 70E address shock hazard analysis?
The analysis must account for environmental factors that increase shock risk, adjusting boundaries accordingly (NFPA 70E, Article 130.3).
- 28
What PPE is typically selected from shock hazard analysis under NFPA 70E?
Items like rubber gloves and insulating clothing based on the voltage exposure (NFPA 70E, Article 130.7).
- 29
Under NFPA 70E, what is the restricted approach boundary?
The distance where there is an increased risk of shock from electrical arc-over, requiring additional precautions (NFPA 70E, Article 130.4).
- 30
How does NFPA 70E integrate shock hazard analysis with overall safety programs?
It is a component of the electrical safety program to ensure comprehensive hazard management (NFPA 70E, Article 110.1).
- 31
Under NFPA 70E, what happens if shock hazards change during work?
The analysis must be re-evaluated and updated to reflect new conditions (NFPA 70E, Article 130.5).
- 32
In a scenario with overhead power lines, what analysis is required per NFPA 70E?
A shock hazard analysis to determine minimum safe distances and precautions (NFPA 70E, Article 130.3).
- 33
What is the primary goal of shock hazard analysis as per NFPA 70E?
To prevent electrical shock by identifying risks and implementing controls (NFPA 70E, Article 130.1).
- 34
Under NFPA 70E, how are unqualified workers protected by shock hazard analysis?
By establishing and enforcing limited approach boundaries (NFPA 70E, Article 130.4).
- 35
What must be done before a worker crosses the restricted approach boundary under NFPA 70E?
Ensure the shock hazard analysis confirms the worker is qualified and protected (NFPA 70E, Article 130.4).
- 36
Under NFPA 70E, how is voltage measurement used in shock hazard analysis?
To accurately determine exposure levels and set appropriate boundaries (NFPA 70E, Article 130.5).
- 37
In a workplace with multiple voltage levels, what does NFPA 70E require for analysis?
A shock hazard analysis for each voltage to address specific risks (NFPA 70E, Article 130.3).
- 38
What documentation supports shock hazard analysis per NFPA 70E?
Records of the analysis, including diagrams and risk assessments (NFPA 70E, Article 130.5).
- 39
Under NFPA 70E, how does shock hazard analysis relate to lockout/tagout?
It may determine if LOTO is feasible; if not, energized work procedures apply (NFPA 70E, Article 120).
- 40
What is the process for reviewing shock hazard analysis under NFPA 70E?
Periodic reviews to ensure it remains effective against current hazards (NFPA 70E, Article 110.5).
- 41
In a scenario of emergency response, how does NFPA 70E guide shock hazard analysis?
Analysis should be pre-planned for quick hazard assessment during incidents (NFPA 70E, Article 110.6).
- 42
Under NFPA 70E, what elements define the shock protection boundaries?
Voltage ratings and environmental conditions as determined in the analysis (NFPA 70E, Article 130.4).
- 43
What training elements are covered for shock hazard analysis in NFPA 70E?
Recognition of electrical hazards and proper analysis techniques (NFPA 70E, Article 110.2).
- 44
Under NFPA 70E, how are shock risks quantified in analysis?
Through evaluation of exposure potential and severity based on system characteristics (NFPA 70E, Article 130.3).
- 45
What follow-up actions are required after shock hazard analysis per NFPA 70E?
Implementation of recommended controls and monitoring for compliance (NFPA 70E, Article 130.6).
- 46
In a construction setting, how does NFPA 70E apply shock hazard analysis?
It must be integrated with OSHA requirements for electrical safety (NFPA 70E, in conjunction with 29 CFR 1926).
- 47
Under NFPA 70E, what is the impact of human error on shock hazard analysis?
The analysis must account for it by incorporating additional safeguards (NFPA 70E, Article 130.3).
- 48
What is the relationship between shock hazard analysis and incident energy in NFPA 70E?
While separate, they may be assessed together for comprehensive protection (NFPA 70E, Article 130.5).
- 49
Under NFPA 70E, how are barriers used in shock hazard analysis?
As a control measure to enforce approach boundaries (NFPA 70E, Article 130.6).
- 50
In a scenario with faulty equipment, what must be done per NFPA 70E?
Conduct or update the shock hazard analysis to address the new risks (NFPA 70E, Article 130.5).
- 51
What qualifications are needed for interpreting shock hazard analysis under NFPA 70E?
The individual must be a qualified person with relevant training (NFPA 70E, Article 110.2).
- 52
Under NFPA 70E, how does shock hazard analysis inform work permits?
It provides the basis for safe work permits on energized systems (NFPA 70E, Article 130.2).
- 53
What is the standard procedure for shock hazard analysis in NFPA 70E?
Follow the steps in Article 130 to identify, assess, and control hazards (NFPA 70E, Article 130.5).
- 54
Under NFPA 70E, how are environmental factors included in shock hazard analysis?
They must be evaluated as they can alter risk levels and boundaries (NFPA 70E, Article 130.3).
- 55
In a team setting, what coordination is needed for shock hazard analysis per NFPA 70E?
All team members must understand the analysis results for safe operations (NFPA 70E, Article 110.5).
- 56
What is the key to effective shock hazard analysis under NFPA 70E?
Accurate identification of all potential electrical exposures (NFPA 70E, Article 130.3).
- 57
Under NFPA 70E, how does shock hazard analysis apply to temporary installations?
It must be performed for any setup with exposed energized parts (NFPA 70E, Article 130.5).
- 58
What ongoing monitoring is required after shock hazard analysis per NFPA 70E?
Continuous assessment to ensure controls remain effective (NFPA 70E, Article 130.6).
- 59
Under NFPA 70E, what role does engineering play in shock hazard analysis?
Designing systems to minimize hazards, as identified in the analysis (NFPA 70E, Article 130.6).
- 60
What is the final step in shock hazard analysis according to NFPA 70E?
Implement and verify the effectiveness of selected controls (NFPA 70E, Article 130.5).
- 61
Under NFPA 70E, how are shock hazards communicated post-analysis?
Through labeling, training, and documentation for all affected personnel (NFPA 70E, Article 130.5).
- 62
In a scenario with unknown voltages, what does NFPA 70E require?
Perform a shock hazard analysis after measuring and verifying the voltage (NFPA 70E, Article 130.3).
- 63
What integration with other standards is needed for shock hazard analysis under NFPA 70E?
It should align with OSHA regulations for overall compliance (NFPA 70E, in conjunction with 29 CFR 1910).