NFPA 70 E Article 130 Test with Complete Solutions

NFPA 70 E Article 130 Test with Complete Solutions 130.1 - Answer-Requirements for work involving electrical hazards such as the electrical safety-related work practices, assessments, precautions, and procedures when an electrically safe work condition cannot be established. 130.2 - Answer-Energized Electrical Work permit 130.2 Energized Electrical work permit - Answer-When work is performed as permitted in accordance with 110., an energized electrical work permit shall be required and documented under any of the following conditions. 130.2 A - Answer-When work is performed as permitted in accordance with 110.4, an energized electrical work permit shall be required and documented under any of the following conditions 130.2 (1) - Answer-When work is performed within the restricted approach boundary 130.2 (2) - Answer-When the employee interacts with the equipment when conductors or circuit parts are not exposed but an increased likelihood of injury from exposure to an arc flash hazard exists 130.2 B - Answer-Elements of a work permit 130.2 B Elements of a work permit - Answer-The work permit shall include, but not limited to 1. the description of the circuit and equipment to be worked on and their location. 2. description of the work performed 3. justification for why the work must be performed. 4 Description of the safe work practices to be employed 5 results of the shock risk assessment 6 results of the arc flash risk assessment 7 means employed to restrict access of unqualified persons from the work area 8 evidence of completion of a job briefing 9 energized work approval Results of the shock risk assessment - Answer-a. voltage to which personnel will be exposed b. limited approach boundary c. restricted approach boundary d. personal and other protective equipment required by this standard to safely perform the assigned task and to protect against the shock hazard. Results of the arc flash risk assessment - Answer-A. available incident energy at the working distance or arc flash PPE category B. Personal and other protective equipment required by this standard to protect against the arc flash hazard C. Arc flash boundary Exemptions to work permit - Answer-Electrical work shall be permitted without an energized electrical work permit if a qualified person is provided with and uses appropriate safe work practices and PPE in accordance with Chapter 1 under any of the following conditions Four conditions of exemptions to work permit - Answer-1. Testing, troubleshooting, or voltage measuring 2. thermography, ultrasound, or visual inspections if the restricted approach boundary is not crossed. 3. Access to and egress from an area with energized electrical equipment if no electrical work is performed and the restricted approach boundary is not crossed. 4. General housekeeping and miscellaneous non-electrical tasks if the restricted approach boundary is not crossed. 130.4 - Answer-Shock risk assessment 130.4 Shock risk assessment (A) General. A shock risk assessment shall be performed: - Answer-1. To identify shock hazards 2. To estimate the likelihood of occurrence of injury or damage to health and the potential severity of injury or damage to health 3. To determine if additional protective measures are required, including the use of PPE. 130.4 (B) Estimate the likelihood of severity - Answer-The estimate of the likelihood of occurrence of injury or damage to health shall take into consideration all of the following (1) the design of the electrical equipment (2) the electrical equipment operating condition and the condition of maintenance 130.4 C Additional protective measures - Answer-If additional protective measures are required, they shall be selected and implemented according to the hierarchy of risk control identified in110.5 (H)(3). 130.4 C When the additional protective measures include the use of PPE, the following shall be determined - Answer-1. The voltage to which personnel will be exposed 2. The boundary requirements 3. The personal and other protective equipment required by this standard to protect against the shock hazard 130.4 D - Answer-Documentation. The results of the shock risk assessment shall be documented 130.4 E - Answer-Shock Protection Boundaries 130.4 E Shock Protection Boundaries - Answer-The shock protection boundaries identified as limited approach boundary and restricted approach boundary shall be applicable where personnel are approaching exposed energized electrical conductors or circuit parts 130.4 F - Answer-Limited Approach Boundary 130.4 F (1) Approach by unqualified persons - Answer-Unless permitted by 130.4 (F)(3), no unqualified person shall be permitted to approach nearer than the limited approach boundary of energized conductors or circuit parts 130.4 (2) - Answer-Working at or close to the limited approach boundary 130.4 (2) Working at or close to the limited approach boundary - Answer-Where one or more unqualified persons are working at or close to the limited approach boundary, the alerting methods in 130.7 E shall be applied to advise the unqualified person (s) of the electrical hazard and warn him or her to stay outside of the limited approach boundary 130.4 (3) - Answer-Entering the limited approach boundary 130.4 (3) Entering the Limited approach boundary - Answer-Where there is a need for an unqualified person to cross the limited approach boundary, a qualified person shall advise the unqualified person of the possible hazards and continuously escort the unqualified person while inside the limited approach boundary. Under no circumstances shall unqualified persons be permitted to cross the restricted approach boundary 130.4 (G) - Answer-Restricted approach boundary 130.4 (G) Restricted approach boundary - Answer-No qualified shall approach or take any conductive object closer to exposed energized electrical conductors or circuit parts than the restricted approach boundary set forth in table 130.4 E a and b, unless one of the following conditions applies 130.4 (G) Restricted approach boundaries conditions - Answer-1. The qualified person is insulated or guarded against energized electrical conductors or circuit parts operating at 50 volts or more. Insulating gloves and sleeves are considered insulation only concerning the energized parts upon which work is performed. 2. The energized electrical conductors or circuit parts are insulated from the qualified person and from any other conductive object at a different potential. 130.4 (E)(a) - Answer-Shock protection approach boundaries to exposed energized electrical or circuit parts for alternating current systems