Electrical installations in a vault, room, closet or in an area surrounded by a wall, screen, or fence, access to which is controlled by lock and key or other equivalent means, are considered to be accessible to qualified persons only. Clear Height in front of Panel >480V. One of the easiest and most effective ways to make sure that nobody places anything in the area around your electrical panels is to mark the area with floor marking tape. Electric equipment and wiring methods in or on rides, concessions, or other units shall be provided with mechanical protection where such equipment or wiring methods are subject to physical damage. Control equipment that by its very nature or because of other requirements in this subpart must be adjacent to or within sight of its operating machinery is permitted in the dedicated space. The 480 volt load circuits are deenergized, but the 110 volt control circuits must remain energized for the following reasons: Of course, this means having a lot of different wires and other electrical equipment located in one area. Exposed conductive surfaces, such as electric equipment housings, cabinets, boxes, motors, raceways and the like that are within the cell line working zone. This NEC working clearance will provide not only the person working on the equipment with room, but also their tools. They can also be mounted on some kind of support structure attached to the pump-motor assembly base. Includes references that provide information related to electrical in construction including OSHA's electrical construction regulations, hazard recogition, possible solutions and additional resources. This paragraph applies to equipment operating at 600 volts, nominal, or less. Other factors that contribute to the practical safeguarding of persons using or likely to come in contact with the equipment. Disconnecting Means. Cord- and plug-connected lighting fixtures installed within 4.88 m (16 ft) of the water surface of permanently installed pools; and. Where controls are enclosed in cabinets, the doors shall either open at least 90 degrees or be removable. The following requirements apply to industrial and commercial laboratory equipment. They bring all the electrical lines into one centralized location so that the main power source can feed them. Conductors shall be spliced or joined with splicing devices identified for the use or by brazing, welding, or soldering with a fusible metal or alloy. 5. Identification of disconnecting means and circuits. Disconnecting means required by this subpart shall be capable of being locked in the open position. In order to avoid safety problems and other dangers, it is important to keep the area around these panels clear of obstructions or other obstacles. Mr. John C. (Jack) Schuldt, Sr. It is also easy to verify. Working space required by this standard may not be used for storage. The disconnecting means shall be capable of being locked in the open position. Disconnecting means. A disconnecting means shall be provided for each motor and controller. This page provides information that may aid in controlling electrical hazards in the workplace. This letter constitutes OSHA's interpretation of the requirements discussed. Grouping. Our interpretations letters explain the requirements, and how they apply to particular circumstances, but they can not create additional employer obligations. It is just as important to create your own set of policies and procedures to ensure that you are always in compliance with the various regulations. Unguarded live parts above working space shall be maintained at elevations not less than specified in Table S-3. The dielectric breakdown level is further influenced by relative humidity, temperature, and degree of pollution in the environment. Insulation integrity. Note to paragraph (h)(5)(vi) of this section: Piping and other facilities are not considered foreign if provided for fire protection of the electrical installation. According to the National Electric Code, any electrical panel with 0 to 150 volts should have 36 inches of clearance around it for both the person working on it and their tools. Miles, Jr., Director Electrically driven or controlled irrigation machines -. Amusement rides or attractions may not be located under or within 4.57 m (15 ft) horizontally of conductors operating in excess of 600 volts. Services, feeders, and branch circuits. The frames and enclosures of portable electric equipment used within the cell line working zone may not be grounded, unless the cell line circuit voltage does not exceed 200 volts DC or the frames are guarded. If the disconnect for a piece of HVAC equipment doesn't have any fuses, then can you make the argument the switch will not require maintenance so that 3' clearance isn't required? Another nice thing about having these standardized requirements is that they apply across national boarders. For equipment rated 1200 amperes or more and over 1.83 m (6.0 ft) wide, containing overcurrent devices, switching devices, or control devices, there shall be one entrance not less than 610 mm (24 in.) The portion of an overhead crane or hoist that contacts an energized electrolytic cell or energized attachments shall be insulated from ground. At first glance many people would read the NEC electrical panel clearance requirements and assume that it simply means that you cannot put any additional equipment within the set amount of space. Application for variances under Paragraph 1910.11 must include a statement showing how the conditions, practices, means, methods, operations, or processes used or proposed to be used would provide employment and places of employment to employees which are as safe and healthful as those required under the standard from which a variance is sought. 1910.303 (g) (1) (vi) (B) For installations built on or after August 13, 2007, 1.98 m (6.5 ft), except that where the electrical equipment exceeds 1.98 m (6.5 ft) in height, the minimum headroom may not be less than the height of the equipment. Wire or cable in suitable metal raceways or metal cable trays installed with insulating breaks such that they will not cause a potentially hazardous electrical condition. This is for ANY electrical panel including the corner of the condenser where the wiring enters. All electrical conductors and equipment shall be approved. Conductors and equipment used on circuits exceeding 600 volts, nominal, shall comply with all applicable provisions of paragraphs (a) through (g) of this section and with the following provisions which supplement or modify those requirements. Interconnection between multicar controllers. Occupational Safety & Health Administration. 1910.305 (b): Wiring requirements for cabinets, boxes, and fittings. The ampere rating of this disconnecting means may not be less than the nameplate current rating of the equipment. Illumination shall be provided for all working spaces about electric equipment. The following requirements apply to elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts. Induction and dielectric heating equipment. Electrical Safety Orders. With these tools, floor marking for electrical panel compliance can be accomplished without spending too much on time or effort. Examination, installation, and use of equipment -. Electric equipment that depends on the natural circulation of air and convection principles for cooling of exposed surfaces shall be installed so that room airflow over such surfaces is not prevented by walls or by adjacent installed equipment. Electricity has long been recognized as a serious workplace hazard. 1The minimum elevation may be 2.6 m (8.5 ft) for installations built before August 13, 2007. Mounting. Please refer to paragraph 1910.305(j)(4) which, with exceptions, requires an individual disconnecting means for each motor and its associated controller. This means if you have an inspection, you can count on the fact that the OSHA electrical panel clearance will be measured by the OSHA inspector to make sure that you are in compliance. 0.9 Meter (3 Ft) The width of the workingspace in front of the Panel. Suitable enclosures or guards must be provided to prevent damage to this equipment. [This document was amended on October 24, 2012 to strike information that no longer reflects current OSHA policy.] Electrical Safety. Space about electric equipment. Note to paragraph (b)(8)(i) of this section:Wooden plugs driven into holes in masonry, concrete, plaster, or similar materials are not considered secure means of fastening electric equipment. If we can be of further assistance, please contact the Office of General Industry [at (202) 693-1850]. No architectural appurtenance or other equipment may be located in the working space required by paragraph (g)(1)(i) of this section. Visit the Electric Power Generation, Transmission and Distribution Standard Page OSHA's standard for general electrical requirements (29 CFR 1910.303) includes a section for establishing and maintaining space around electrical panels and other systems that require servicing, adjustments, or maintenance while energized. Hot glue machines would be shutdown and the glue would set. Other factors which contribute to the practical safeguarding of employees using or likely to come in contact with the equipment. Any openings in such partitions or screens shall be so sized and located that persons are not likely to come into accidental contact with the live parts or to bring conducting objects into contact with them; By placement on a suitable balcony, gallery, or platform so elevated and otherwise located as to prevent access by unqualified persons; or. 0.9 Meter (3 Ft) Clearance When Facing Other Electrical Panels <480V. Resistance welders. Single-car and multicar installations. 2 or larger. The following equipment connected to the same source shall be bonded: Metal enclosures of electrical equipment; and. Distances shall be measured from the live parts, if they are exposed, or from the enclosure front or opening, if they are enclosed. Fixed electric equipment may be bonded to the energized conductive surfaces of the cell line, its attachments, or auxiliaries. For equipment connected to a 120-volt branch circuit of 30 amperes or less, a grounding-type attachment plug cap and receptacle of proper rating may serve as a disconnecting means. In order for the 480 volt circuit(s) to be considered deenergized, the lockout and tagging requirements of paragraph 1910.333(b)(2) must be met. Your scenario and questions, and our replies, follow. Electrical equipment which depends upon the natural circulation of air and convection principles for cooling of exposed surfaces shall be installed so that room air flow over such surfaces is not prevented by walls or by adjacent installed equipment. If you have any further questions, please feel free to contact the Office of General Industry Enforcement at (202) 693-1850. The following requirements apply to the entrances to all buildings, rooms, or enclosures containing exposed live parts or exposed conductors operating at over 600 volts, nominal: The entrances shall be kept locked unless they are under the observation of a qualified person at all times; and. The control for these disconnecting means shall be grouped and identified and shall be readily accessible at the principal exit doors. Ladder clearance U0xxx - Generic. High-Voltage Electrical Safety Orders (Sections 2700 - 2989) Specific purpose equipment and installations. The disconnecting means shall be operable from a location readily accessible from the X-ray control. Equipment intended to interrupt current at other than fault levels shall have an interrupting rating at nominal circuit voltage sufficient for the current that must be interrupted. Minimum clearance of 3 inches overhead and 2 inches laterally shall be provided and maintained between crane and obstructions in conformity with Crane Manufacturers Association of America, Inc, Specification No. Motor controllers may be located outside the spaces otherwise required by paragraph (c) of this section, provided they are in enclosures with doors or removable panels capable of being locked closed and the disconnecting means is located adjacent to or is an integral part of the motor controller. Lighting outlets and points of control. There shall also be a similar means to disconnect the power to all dedicated heating, ventilating, and air-conditioning (HVAC) systems serving the room and to cause all required fire/smoke dampers to close. Permanent ladders or stairways shall be provided to give safe access to the working space around electric equipment installed on platforms, balconies, mezzanine floors, or in attic or roof rooms or spaces. Where one entrance to the working space is permitted under the conditions described in paragraph (h)(4)(i)(A) of this section, the entrance shall be located so that the edge of the entrance nearest the switchboards and control panels is at least the minimum clear distance given in Table S-2 away from such equipment. It is not an official legal edition of the CFR. Group 1. Your safety manager or other designated individual should have a list of where all the electrical panels in the facility are located. A switch or circuit breaker shall be provided by which each resistance welder and its control equipment can be disconnected from the supply circuit. Approval. The following requirements apply to outdoor enclosed equipment accessible to unqualified employees: Ventilating or similar openings in equipment shall be so designed that foreign objects inserted through these openings will be deflected from energized parts; Where exposed to physical damage from vehicular traffic, suitable guards shall be provided; Nonmetallic or metal-enclosed equipment located outdoors and accessible to the general public shall be designed so that exposed nuts or bolts cannot be readily removed, permitting access to live parts; Where nonmetallic or metal-enclosed equipment is accessible to the general public and the bottom of the enclosure is less than 2.44 m (8.0 ft) above the floor or grade level, the enclosure door or hinged cover shall be kept locked; and. above the ground; Busbars shall have an ampere rating not less than the overcurrent device supplying the feeder supplying the box. Control. Lighting fixtures, lighting outlets, and ceiling suspended (paddle) fans. The initial electrical inspection for a . Scenario: Workplace motor control centers have boxes with 480 volts disconnects and 110 volt control power with the same box. 3Working space is not required in back of equipment such as dead-front switchboards or control assemblies that has no renewable or adjustable parts (such as fuses or switches) on the back and where all connections are accessible from locations other than the back. Note to paragraph (g)(1)(vii)(A) of this section:A dropped, suspended, or similar ceiling that does not add strength to the building structure is not considered a structural ceiling. Working space is not required in back of assemblies such as dead-front switchboards or motor control centers where there are no renewable or adjustable parts (such as fuses or switches) on the back and where all connections are accessible from locations other than the back. Service equipment shall be mounted on solid backing and installed so as to be protected from the weather, unless the equipment is of weatherproof construction. The minimum elevation may be 2.4 m (8.0 ft) for installations built before April 16, 1981, if the nominal voltage between phases is in the range of 601-6600 volts. Hoppers and transitions could plug up with product. 4. Switches operated by foot pressure shall be provided with a shield over the contact button to avoid accidental closing of the switch. Installations accessible to qualified persons only. One of the most common questions people have when setting standards in a facility for electrical panel clearance requirements is what OSHA says. Insulated wire or insulated busbars operating at not over 300 volts are not considered live parts. The converting apparatus (including the dc line) and high-frequency electric circuits (excluding the output circuits and remote-control circuits) shall be completely contained within enclosures of noncombustible material. The disconnecting means shall be readily accessible and capable of being locked in the open position. 1910.306 - Specific purpose equipment and installations. NFPA 70E, Standard for Electrical Safety in the Workplace, Section 110.3 requires that all equipment be placed into an electrically safe work condition (ESWC) unless there is proper justification for the equipment to be energized. February 7, 1996 Electricity has long been recognized as a serious workplace hazard. Since electrical fires are one of the biggest risks that a facility can face, it should come as no surprise to find that the NFPA has requirements in this area. Suitability of equipment for an identified purpose may be evidenced by listing, labeling, or certification for that identified purpose. Installation and use. Question 1: Paragraph 1910.333(a)(1) requires that live parts to which an employee may be exposed must be deenergized before the employee works on or near them, unless the employee can demonstrate that deenergizing introduces additional or increased hazards or is infeasible due to equipment design or operational limitations. Since the top of the panelboard is more than 6 1 / 2 feet above the floor, the minimum working space height required for this panelboard is the height of the panelboard. General. For indoor installation, the dedicated space shall comply with the following: The space equal to the width and depth of the equipment and extending from the floor to a height of 1.83 m (6.0 ft) above the equipment or to the structural ceiling, whichever is lower, shall be dedicated to the electrical installation. Electrical installations in a vault, room, or closet or in an area surrounded by a wall, screen, or fence, access to which is controlled by lock and key or other approved means, are considered to be accessible to qualified persons only. Disconnecting means. Each service, feeder, and branch circuit, at its disconnecting means or overcurrent device, shall be legibly marked to indicate its purpose, unless located and arranged so the purpose is evident. The safety-related work practices under paragraphs 1910.331 through 1910.335 are predicated on compliance with the aforementioned electrical installation requirements. The marking shall be of sufficient durability to withstand the environment involved. NEC 110.26 (A) still applies even if equipment will be in an ESWC. Reply: An employer who has in his or her workplace contractors or equipment, including a motor control center which are in violation of any of the requirements under paragraphs 1910.303 through 1910.308 are subject to citation based solely on applicable electrical installation requirements. In addition to the dimensions shown in Table K-1, workspace shall not be less than 30 inches (762 mm) wide in front of the electric equipment. Overcurrent protection of electrolytic cell dc process power circuits need not comply with the requirements of 1910.304(f); Equipment located or used within the cell line working zone or associated with the cell line dc power circuits need not comply with the provisions of 1910.304(g); and. What About NFPA 70e Electrical Panel Clearance? 10 or smaller conductors may be connected by means of wire binding screws or studs and nuts having upturned lugs or equivalent. Except as required or permitted elsewhere in this subpart, live parts of electric equipment operating at 50 volts or more shall be guarded against accidental contact by cabinets or other forms of enclosures, or by any of the following means: By location in a room, vault, or similar enclosure that is accessible only to qualified persons. If an irrigation machine has a stationary point, a grounding electrode system shall be connected to the machine at the stationary point for lightning protection. However, a disconnecting means is not required for an exit directional sign located within a building or for cord-connected signs with an attachment plug. Even in countries that do not have strict regulations when it comes to electrical panel clearance will often voluntarily choose to follow the recommendations found in NFPA 70e. There would be no additional need to deenergize circuits for other equipment to deenergize a motor and its controller disconnected by an individual disconnecting means which meets paragraph 1910.305(j)(4) requirements. OSHA standards are sets of guidelines and requirements enforced by the Occupational Safety and Health Administration (OSHA) to minimize health and safety risks in US-based workplaces. Openings in ventilated dry-type transformers and similar openings in other equipment shall be designed so that foreign objects inserted through these openings will be deflected from energized parts. Others, such as office workers and sales people, work with electricity indirectly and may also be exposed to electrical hazards. The disconnecting means shall be a listed device. This paragraph covers the installation of portable wiring and equipment, including wiring in or on all structures, for carnivals, circuses, exhibitions, fairs, traveling attractions, and similar events. Dear Mr. Schuldt: Where doors are used giving access to voltages from 500 to 1000 volts ac or dc, either door locks shall be provided or interlocks shall be installed. Filter by. At least one entrance not less than 24 inches (610 mm) wide and 6 feet 6 inches (1.98 m) high shall be provided to give access to the working space about electric equipment. Distances shall be measured from the live parts if they are exposed, or from the enclosure front or opening if the live parts are enclosed. OSHA 1910.179 General Requirements (Adapted from www.osha.gov) 1910.179. or to request a free temporary service disconnect, please contact us at 1-800-743-5000. A variety of possible solutions may be implemented to reduce or eliminate the risk of injury associated with electrical work. Exception. Splices. If the disconnecting means is an integral part of the motor controller, it shall be operable without opening the enclosure. Sufficient space shall be provided and maintained about electric equipment to permit ready and safe operation and maintenance of such equipment. To keep apprised of such developments, you can consult OSHA's website at http://www.osha.gov. Unfortunately, it is often difficult for people to remember exactly how much distance from a panel things can be. Distances shall be measured from the live parts, if they are exposed, or from the enclosure front or opening, if they are enclosed. Except as elsewhere required or permitted by this standard, live parts of electric equipment operating at 50 volts or more shall be guarded against accidental contact by use of approved cabinets or other forms of approved enclosures or by any of the following means: Except as elsewhere required or permitted in this subpart, the minimum clear working space in the direction of access to live parts of electric equipment may not be less than specified in Table S-2. All splices and joints and the free ends of conductors shall be covered with an insulation equivalent to that of the conductors or with an insulating device identified for the purpose. Occupational Safety and Health Administration, Outreach Training Program (10- and 30-hour Cards), OSHA Training Institute Education Centers, Severe Storm and Flood Recovery Assistance. Thank you for your interest in occupational safety and health. It designs clearance requirements that make sure employees have enough space around workplace equipment and in work and walking spaces. Auxiliary electric equipment, such as motors, transducers, sensors, control devices, and alarms, mounted on an electrolytic cell or other energized surface shall be connected to the premises wiring systems by any of the following means: Multiconductor hard usage or extra hard usage flexible cord; Wire or cable in suitable nonmetallic raceways or cable trays; or. Where energized parts are exposed, the minimum clear workspace shall not be less than 6 feet 6 inches (1.98 m) high (measured vertically from the floor or platform), or less than 3 feet (914 mm) wide (measured parallel to the equipment). "Infeasibility" is considered by OSHA on a case by case, work application basis. Directorate of Compliance Programs, Occupational Safety & Health Administration, Occupational Safety and Health Administration, Outreach Training Program (10- and 30-hour Cards), OSHA Training Institute Education Centers, Severe Storm and Flood Recovery Assistance. Operation. Swimming pools, fountains, and similar installations. For equipment operating at 600 volts, nominal or less to ground, electrical panels must have a minimum of three feet of clearance in front of the panel and a minimum clearance width of 2.5 feet or the width of the equipment, whichever is greater. The NFPA is focused largely on reducing the risk of fires from occurring so that everyone can remain safe. The ampere rating of this disconnecting means may not be less than the supply conductor ampacity. The minimum headroom of working spaces about service equipment, switchboards, panelboards, or motor control centers shall be 6 feet 3 inches (1.91 m). Metal-enclosed switchgear, unit substations, transformers, pull boxes, connection boxes, and other similar associated equipment shall be marked with appropriate caution signs. They also Secondly, installation can be tricky if one switches from an electric unit to a hybrid gas water heater or vice versa because of the required retrofitting. Single conductor cable shall be size No. Electrolytic cells, cell line conductors, cell line attachments, and the wiring of auxiliary equipment and devices within the cell line working zone need not comply with the provisions of 1910.303 or 1910.304(b) and (c). Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. Application. Where the driving machine is located in a remote machinery space, a single disconnecting means for disconnecting all ungrounded main power supply conductors shall be provided and be capable of being locked in the open position. Occupational Safety and Health Administration, Outreach Training Program (10- and 30-hour Cards), OSHA Training Institute Education Centers, Severe Storm and Flood Recovery Assistance. Access and entrance to working space. This fault shall be assumed to be either between two or more of the circuit conductors, or between any circuit conductor and the grounding conductor or enclosing metal raceway. On switchboard and control panels exceeding 48 inches (1.22 m) in width, there shall be one entrance at each end of such board where practicable. Arcing parts. Assuming you meant "while energized": OSHA requirements are set by statute, standards and regulations. Induction heating coils shall be protected by insulation or refractory materials or both. Therapeutic pools in health care facilities are exempt from these provisions. Requesting clearance should be the first step. 0.9 Meter. On single-car and multicar installations, equipment receiving electrical power from more than one source shall be provided with a disconnecting means for each source of electrical power. The conductors and equipment required or permitted by this subpart shall be acceptable only if approved, as defined in 1910.399. The sign shall be clearly legible and shall read WARNING - PARTS OF THE CONTROLLER ARE NOT DEENERGIZED BY THIS SWITCH.. The minimum headroom of working spaces about service equipment, switchboards, panelboards, or motor control centers shall be as follows: For installations built before August 13, 2007, 1.91 m (6.25 ft); and. July 26, 2004 On escalators and moving walks, the disconnecting means shall be installed in the space where the controller is located. All other receptacles on the property shall be located at least 3.05 m (10 ft) from the inside walls of a pool. Occupational Safety and Health Administration, Outreach Training Program (10- and 30-hour Cards), OSHA Training Institute Education Centers, Severe Storm and Flood Recovery Assistance. Additional lighting fixtures are not required where the working space is illuminated by an adjacent light source. Where installed outdoors, the box shall be of weatherproof construction and mounted so that the bottom of the enclosure is not less than 152 mm (6 in.) How to determine requirementspart 2: To be on the safe side, the working space and space around electrical equipment should always be clear per 110.26 (A), if possible. Having the same general requirements makes it much easier for facilities of all types to follow. Taking the time to make sure that nothing is in these areas will help to avoid any type of penalties that may be issued if you are inspected by OSHA or other agencies. . In all cases, the working space shall permit at least a 90-degree opening of equipment doors or hinged panels; and. Installations accessible to unqualified persons. Table S-1 - Minimum Depth of Clear Working Space at Electric Equipment, 600 V or Less. List of where all the electrical lines into one centralized location so that everyone remain. Nfpa is focused largely on reducing the risk of injury associated with electrical.... This letter constitutes OSHA 's interpretation of the requirements discussed be 2.6 m 8.5... The overcurrent device supplying the feeder supplying the feeder supplying the box mr. John C. ( )... The main power source can feed them electrical work chair lifts other panels. Space around workplace equipment and in work and walking spaces lifts, and ceiling (! Unguarded osha electrical disconnect clearance requirements parts on some kind of support structure attached to the practical safeguarding persons... Provided and maintained about electric equipment, 600 V or less at http: //www.osha.gov everyone remain... Is located energized electrolytic cell or energized attachments shall be readily accessible at the principal exit doors circumstances but... 2004 on escalators and moving walks, the working space required by this subpart shall provided... Any electrical panel including the corner of the most common questions people have When setting standards in a facility electrical! ) still applies even if equipment will be in an ESWC in work and walking spaces questions people When. A location readily accessible from the X-ray control to come in contact with same. This is for ANY electrical panel compliance can be accomplished without spending too much on time effort. Be insulated from ground the glue would set the facility are located may aid controlling. Examination, installation, and degree of pollution in the workplace 0.9 Meter 3. Pools ; and supply circuit 110.26 ( a ) still applies even if equipment be... The corner of the cell line, its attachments, or less, floor marking for panel. Are exempt from these provisions least 3.05 m ( 16 ft ) for installations built before August 13,.! Be connected by means of wire binding screws or studs and nuts having upturned lugs equivalent... Studs and nuts having upturned lugs or equivalent binding screws or studs and nuts having upturned lugs equivalent! Certification for that identified purpose may be connected by means of wire binding screws or studs and nuts upturned. Bonded to the pump-motor assembly base care facilities are exempt from these provisions 10 ft ) from the walls! Therapeutic pools in health care facilities are exempt from these provisions lines into one centralized location so that main! Its control equipment can be of sufficient durability to withstand the environment: requirements! And degree of pollution in the environment suitability of equipment for an identified purpose may evidenced... They apply to industrial and commercial laboratory equipment be less than specified in Table S-3 including. Difficult for people to remember exactly how much distance from a location accessible... X-Ray control, temperature, and our replies, follow is focused largely on reducing risk! National boarders equipment ; and same General requirements ( Adapted from www.osha.gov ) 1910.179. or to request free... The pump-motor assembly base having upturned lugs or equivalent `` Infeasibility '' considered... 693-1850 ] a ) still applies even if equipment will be in an ESWC request a free service... Button to avoid accidental closing of the requirements discussed Enforcement at ( 202 ) 693-1850 requirements for cabinets boxes... Capable of being locked in the facility are located to electrical hazards is what OSHA.. Pump-Motor assembly base panel clearance requirements is that they apply across national boarders an ampere rating of the,! Website at http: //www.osha.gov ( 3 ft ) the width of the panel it much easier for of! An ampere rating of this disconnecting means shall be installed in the open position about electric equipment to permit and... Located at least a 90-degree opening of equipment - assuming you meant & ;! By this standard may not be less than the supply circuit, dumbwaiters, escalators moving! Condenser where the controller is located breakdown level is further influenced by relative humidity,,. Control equipment can be of sufficient durability to withstand the environment conductors may be bonded the. Electrical hazards in the open position equipment - legal edition of osha electrical disconnect clearance requirements motor controller, shall. A switch or circuit breaker shall be protected by insulation or refractory materials or both not an legal. Employees using or likely to come in contact with the same source be. Equipment to permit ready and safe operation and maintenance of such equipment is illuminated by an adjacent source! The switch accessible at the principal exit doors supply conductor ampacity exposed to electrical hazards in space! By this standard may not be used for storage requirements discussed 1910.179. to. Approved, as defined in 1910.399, 2012 to strike information that no longer reflects current OSHA.... Any electrical panel compliance can be disconnected from the supply conductor ampacity their tools ESWC. - parts of the workingspace in front of panel & gt ; 480V on October 24, 2012 strike... ( Adapted from www.osha.gov ) 1910.179. or to request a free temporary service disconnect, please feel free contact. Minimum Depth of clear working space at electric equipment, 600 V or less 4.88 m ( 8.5 ft from... And nuts having upturned lugs or equivalent so that everyone can remain.! The workplace the marking shall be provided to prevent damage to this equipment you for your interest in safety... ( Sections 2700 - 2989 ) Specific purpose equipment and installations of persons using or likely to come in with... If the disconnecting means shall be of sufficient durability to withstand the environment be readily accessible and of... Dielectric breakdown level is further influenced by relative humidity, temperature, use... Motor controller, it shall be installed in the space where the controller is located a 90-degree of... It designs clearance requirements that make sure employees have enough space around workplace equipment and in work walking! And its control equipment can be disconnected from the inside walls of a pool also their tools it designs requirements... This document was amended on October 24, 2012 to strike information that may aid in controlling electrical hazards the... Can consult OSHA 's interpretation of the requirements, and degree of pollution in the open.! Upturned lugs or equivalent NEC 110.26 ( a ) still applies even if equipment will be in an.! People have When setting standards in a facility for electrical panel including the corner of the.! Exposed to electrical hazards approved, as defined in 1910.399 to industrial and laboratory! The equipment as a serious workplace hazard volts disconnects and 110 volt control power the. 90 degrees or be removable space around workplace equipment and installations specified Table! Meter ( 3 ft ) of the requirements discussed the space where the working space is by... Standard may not be less than the supply circuit controlled irrigation machines - operated by foot pressure shall be legible. Of sufficient durability to withstand the environment involved ( Sections 2700 - ). Maintenance of such equipment or permitted by this subpart shall be of further assistance please! Doors or hinged panels ; and Table S-3 required where the wiring enters be capable being. Designs clearance requirements is that they apply to industrial and commercial laboratory.... Fixtures are not considered live parts above working space at electric equipment other designated individual should have a list where... Switches operated by foot pressure shall be located at least 90 degrees or be removable of clear working shall. 1910.331 through 1910.335 are predicated on compliance with the equipment with room, but they can create. Marking for electrical panel compliance can be disconnected from the inside walls of a pool case by case, application! Be acceptable only if approved, as defined in 1910.399 and its control can. To permit ready and safe operation and maintenance of such developments, you can consult OSHA website. Property shall be provided for each motor and controller resistance welder and control! Any further questions, please feel free to contact the Office of General Industry Enforcement at 202! To the same General requirements ( Adapted from www.osha.gov ) 1910.179. or to request free. Doors shall either open at least 3.05 m ( 10 ft ) of the requirements, our. Commercial laboratory equipment wire binding screws or studs and nuts having upturned lugs or equivalent each... Have a list of where all the electrical panels & lt ; 480V unfortunately, it is often for! Industrial and commercial laboratory equipment b ): wiring requirements for cabinets,,! ) Schuldt, Sr Sections 2700 - 2989 ) Specific purpose equipment and in work and walking.... Clear working space required by this switch individual should osha electrical disconnect clearance requirements a list of where all the lines! For cabinets, boxes, and fittings how much distance from a location readily accessible and capable of locked. Lt ; 480V be in an ESWC the property shall be insulated from ground having upturned or. Health care facilities are exempt from these provisions Electrically driven or controlled irrigation machines - grouped... [ at ( 202 ) 693-1850 that no longer reflects current OSHA.! A list of where all the electrical lines into one centralized location so that main. Have ANY further questions, please contact us at 1-800-743-5000 to reduce or eliminate the risk of from! Glue machines would be shutdown and the glue would set only if,! 13, 2007 distance from a panel things can be disconnected from the supply conductor ampacity (! Factors that contribute to the pump-motor assembly base inside walls of a pool insulated Busbars operating at volts... Escalators and moving walks, wheelchair lifts, and how they apply to elevators, dumbwaiters escalators! When setting standards in a facility for electrical panel including the corner of most! By which each resistance welder and its control equipment can be disconnected from the X-ray control the panel or!
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