If the qualified electrical workers are unable or unwilling to. Never cross the restricted approach boundary. observed. A plan that is documented and approved by authorized management • Question 9 4 out of 4 points What is the main purpose of the. Limited approach boundary is the distance from an exposed energized conductor or circuit part within which a shock hazards exists. • Without a marked boundary, an unqualified co-worker could accidentally come in contact with live parts. Determine which of the following among the NFPA 70E requirements relate to qualified person training, both generally and when such persons are permitted to work within the limited approach boundary. With the limited approach boundary, you’re a couple steps back from the equipment, approximately 36 to 42 inches. Study with Quizlet and memorize flashcards containing terms like What is the range of the limited approach boundary?, When is a limited approach boundary used?, What are three ways to mark a limited approach boundary? and more. Limited Approach Boundary: Distance from an exposed live part within which a shock hazard exists. Three key elements are “safe work practices. • The shock protection boundary farthest away from the energized part is the Limited Approach Boundary. Limited Approach Boundary ; Entered only by qualified persons or unqualified persons escorted by qualified person ; Restricted Approach Boundary ; Entered only by qualified persons required to use shock protection techniques and equipment Study with Quizlet and memorize flashcards containing terms like An unqualified person may cross the_____only if they are advised and are continuously escorted by a qualified person. • The “Restricted Approach Boundary” is the electric shock protection boundary closest to the exposed energized parts and may only be crossed by qualified electrical workers following safe electrical work-practices, which include wearing appropriate shock protection PPE and using insulated tools. 1 Limited Approach Boundary . shall ensure that no . 6 (A) (1) Qualified Person. True b. The restricted approach boundary is the radius within which an elevated risk of shock from arc-over or inadvertent movement contact exists. Arc Flash Boundary (distance where upLimited Approach—this is the distance where barriers should be placed to protect personnel. Limited Approach Boundary. Unqualified persons must stay outside the limited approach boundary unless they are escorted by a qualified person. Qualified persons may also escort unqualified persons through the. continuously escorted by a qualified worker. 17 Working near (live parts): Any activity within a Limited Approach Boundary. 2 cal/cm2. (a) Such persons shall also be familiar with the proper. Only electrically qualified employees may enter the LAB. It should be entered only by qualified persons or unqualified persons that have been advised and are escorted by a qualified person. An unqualified person may cross the limited approach boundary if they are under the direct and continuous supervision of a qualified person. Restricted boundary The area closest to the live. The arc flash boundary is the minimum safe distance from the energized equipment that an unqualified worker can approach without wearing PPE. Limited approach boundary: The limited approach boundary is the distance from an exposed live part within which a shock hazard exists. 1. Sometimes this boundary is the furthest one from the exposed equipment, other times the limited approach boundary is the furthest out. The exemptions are still applicable today. 2. The standard outlines additional training required for people working within the Limited Approach Boundary (see sidebar) of 3. 4D(b) for DC APPENDIX “F” Page 18 unless the qualified person is insulated or guarded from the live parts. , Per, OSHA, clearance (safe approach) distances for qualified employees working on or near. 1. Flash Protection Boundaries Limited Approach Boundary Entered only by qualified persons or unqualified persons escorted by qualified person Restricted Approach Boundary Entered only by qualified persons required to use shock protection techniques and equipment Prohibited Approach Boundary Entered only by qualified persons. An unqualified person MAY enter the Limited Approach Boundary, but ONLY if continuously escorted by a Qualified Person, and advised of the potential hazards. limited approach boundary Click the card to flip 👆 An unqualified person may cross the ___ on if they are advised of the specific hazards and are continuously escorted by a qualified person 15. Unqualified persons may not cross the Limited Approach Boundary unless briefed on the hazards and escorted by a qualified person. Arc flash boundary. Unqualified persons may not cross the Limited Approach Boundary unless briefed on the hazards and escorted by a qualified person. Prohibited Approach Boundary~ 1 inch. No unqualified person shall be permitted to approach nearer than the limited approach boundary of energized conductors and circuit parts unless a qualified person advises him or her of. 4(D) Shock Protection Boundaries. In summary, unless you are qualified stay outside the limited approach boundary for all electrical hazards!!(2) Entering the Limited Approach Boundary. e. To cross the Restricted Approach Boundary into the Restricted Space, the qualified person, who has completed required training, must wear appropriate personal protective equipment (PPE). e. This distance is _____ for 300-600v. 2. Qualified workers wearing appropriate personal protective equipment (PPE) can enter the limited approach boundary. 9. A qualified person, says OSHA standard 1910. 130. b This term describes a condition in which the distance between the conductor and a person is not under the control of the person. This. 18 Working on (live parts): Coming in contact with live parts via tools, probes, test equipment, hands, feet, or other body parts regardless of the level of PPE worn. means an approach limit at a distance from an exposed energized electrical conductor or circuit part within which a shock hazard exists. Bear in mind, you must wear PPE. ), for non-qualified personnel, unless escorted by a qualified worker. The National Fire Protection Association (NFPA) has developed specific approach boundaries designed to protect employees while working on or near energized. 1 unqualified persons are allowed in the Limited Approach Boundary if continually escorted by a qualified person, (with no mention of PPE) and C. Unqualified workers are never permitted within the restricted approach boundary. No unqualified person is allowed inside the limited approach boundary unless they are being escorted by a qualified person. persons may approach unaccompanied. unqualified persons unless escorted by a qualified person. 2(B)(3), an EEWP is not required if a qualified person uses appropriate safe work practices and PPE in accordance with Chapter 1 to perform certain tasks as long as the restricted approach boundary is not crossed and one of those tasks is thermography (my emphasis). 1. This is the most common Limited Approach Boundary value used. A flash hazard analysis must be performed in order to protect personnel from the possibility of injury due to arc flash. Doc Preview. False 16. The contract employer must ensure that. The limited approach boundary is the minimum distance from the energized item where unqualified personnel may safely stand. Approach distances to exposed live parts The National Fire Protection Association defines three approach distances for shock hazards and one for arc flash. • Restricted Approach Boundary — boundary that. one who has demonstrated the skills and knowledge related to the construction and operation of the electrical equipment and installations, and has received. 1 unqualified persons are allowed in the Limited Approach Boundary if continually escorted by a qualified person, (with no mention of PPE) and C. prohibited approach d. However, wet conditions, high available-Tasks that pose little risk, tasks that are justified-A qualified person using safe work practices and PPE is required for any justified energized work Shock Risk Assessment -Identify shock hazards, -Estimate likelihood of occurrence of injury or damage to health -Potential severity of injury or damage to health, determine if additional. The Limited Approach Boundary or the Flash Protection Boundary is marked with red danger tape zone. Sometimes this boundary is the furthest one from the exposed equipment, other times the limited approach boundary is the furthest out. San Diego City College. An unqualified person may cross the _____ only if they are advised of the specific hazards and are continuously escorted by a qualified person. A qualified person must be trained in the skills and techniques to determine nominal voltage. Only when escorted by a qualified person d. unless calculated under engineering supervision. Under no circumstance shall the escorted unqualified person(s) be permitted to cross the Restricted Approach Boundary. 2. 5. This article originally appeared in the November 2007 issue of Occupational Health. An unqaulified person ay cross the ___ only if they are advised of the specific hazards and are continuously escorted by a qualified person. A qualified person is permitted into a limited approach boundary of exposed live parts operating in 50 Volts or more, and shall, at the minimum, be additionally trained in all of the following: 1. Restricted. Appropriate PPE should be worn by qualified workers in the limited space (space between the limited approach boundary and the restricted boundary). (See Clause 4. Limited approach boundary – the distance from an exposed energized electrical conductor or circuit part a person may approach when a shock hazard exits (i. 1. Restricted approach boundary. An approach limit is set at a distance from an exposed live part in the presence of a shock hazard. An approach limit at a distance from an exposed live part within which a shock hazard exists. An unqualified person may enter the limited approach. The NFPA has developed specific approach boundaries designed to protect employees while working on or near energized equipment. A limited approach boundary that only a qualified person or an unqualified person who’s accompanied by a qualified person can cross; and. • Unqualified workers may not cross the Limited Approach Boundary unless briefed on the hazards and continuously escorted by a qualified person. 3. , if the person is wearing appropriate PPE and are supervised by a qualified person). In addition Informative Annex C Limits of Approach C. e. 3. 2 calories/cm2 of incident energy. They must wear flash protective equipment. A non-QEW may be escorted within the Limited Approach Boundary by a Qualified Electrical Worker, but may never enter the Restricted Approach Boundary. (p) The requirement to use insulated tools or handling equipment has been changed from the limited approach boundary to restricted approach boundary. Crossing this boundary is considered “working near energized. In the event there is a need for an unqualified person (manager, sales rep, engineer, professor, student etc. 5. Do not cross the limited approach shock boundary unless advised and continuously escorted by a qualified person. 14 Flash Protection Boundaries. 7 Inches c. • The Limited Approach Boundary is the shock protection boundary farthest away from the exposed energized parts. Unqualified persons cannot cross the restricted approach boundary. 2. Sometimes this boundary is the furthest one from the exposed equipment, other times the limited approach boundary is the furthest out. The distance a qualified person is allowed near a source where shock hazard is present is known as the restricted approach boundary, whereas the distance for an unqualified person is known as the limited approach boundary. e. 1 unqualified persons are allowed in the Limited Approach Boundary if continually escorted by a qualified person, (with no mention of PPE) and C. qualified person for the performance of those specific duties. Limited Approach Boundary Distance from an exposed live part within which a shock hazard exists. The arc flash boundary is calculated to 1. DuPage County Environmental, Safety, Health. ”. A qualified person shall be trained and knowledgeable of the construction and operation of equipment or a specific work method and be trained to recognize and avoid the electrical hazards that might be present with respect to that equipment or work method. Before crossing the limited approach boundary and entering the limited space, a suitably qualified person must use the appropriate PPE and be trained to perform the required work. 110. The registry also fulfills a commitment in. 4 (C) (b) for DC systems, while Arc Flash boundaries are. 20 terms · An approach limit at a distance from an exposed energized electrical conductor or circuit part within which a shock hazard exists → Limited approach boundary, An approach limit at a distance from an exposed energized electrical conductor or circuit part within which there is an increased risk of shock, due to electrical arc-over combined with. Responsibilities:Where there is a need for an unqualified person(s) to cross the limited approach boundary, a qualified person shall advise him or her of the possible hazards and continuously escort the. A motor had tripped out and the area. Barricades D. Boundary-Limited Approach: An approach distance from an exposed energized electrical conductor or circuit part within which a hazard exists. Humber College Capital Development & Facilities Management Contractor Guidelines, Policies & Procedures Revised 2018 04 04 R7 BRB Page 45 of 70 4. Limited and Restricted Approach boundaries deal with shock and are determined by NFPA 70E Tables 130. • The shock protection boundary farthest away from the energized part is the Limited Approach Boundary. Limited Approach Boundary- approach limit at a distance from an exposed live part within which a shock hazard exists. 2 Qualified Persons, Safe Approach Distance. An unqualified person may cross the limited approach boundary if they are under the direct and continuous supervision of a qualified person. limited approach boundary. Limited Approach Boundary. 1 Inch b. A person crossing this line must be qualified to do the job/task. The Limited Approach Boundary (LAB) is the approach distance to exposed, energized electrical components within which a shock hazard exists. 4) Safety Interlocks: Only qualified persons following the requirements for working inside the Restricted Approach Boundary as covered by 130. Correct Answer: Table 130. • In addition, any tools which are carried inside the Limited Approach Boundary must be insulated. g. The limited approach boundary is an approaching boundary to protect personnel from shock. 4. The exact dimensions of the limited approach boundary are determined by the equipment’s incident energy risk assessment. 130. A qualified person must use the appropriate PPE and be trained to perform the required work to cross the limited approach boundary and enter the limited space. Prohibited approach boundary was deleted. Define Limited approach boundary. If unqualified workers must cross the Limited Approach Boundary, they must be escorted by a qualified worker. 399, is “one who has received training in and has demonstrated skills and knowledge in the construction and operation of electric equipment and installations and the hazards involved. Per osha, clearance distance for qualified employees is determined by table __ clearing time. - Both qualified and unqualified persons may work within the limited approach boundary, but a qualified person must. • Unqualified persons may not cross the Limited Approach Boundary unless escorted by a qualified person. In addition Informative Annex C Limits of Approach C. Necessary shock. 130. PROTECTION BOUNDARIES Closest point of approach by personnel not wearing sufficient Arc-Rated PPE Boundary at which the Arc-Flash rating is 1. When the arc flash boundary is the. • The shock protection boundary farthest away from the energized part is the Limited Approach Boundary. • Without a marked boundary, an unqualified co-worker could accidentally come in contact with live parts. The distance is 1ft. exposure to electrical hazards. Do not blind reach into boundary areas. 7. An exception does allow unqualified persons in this area if continuously escorted by a qualified worker. • Prohibited approach boundary: An approach limit at a distance from an exposed live part within. I think I would question. Restricted Approach Boundary (RAB). Total views 14. Restricted Approach Boundary.