osha electrical disconnect clearance requirements

Miles, Jr., Director Lightning protection. beyond the front of the electric equipment. This letter constitutes OSHA's interpretation of the requirements discussed. 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. Horizontal clearance between the conductor and Building. Interrupting rating. Inside tents and concessions. Doors or detachable panels shall be employed for internal access. The depth shall be as required in Table K-2. Thank you for your recent letter to the Occupational Safety and Health Administration (OSHA). Electrolytic cells. Once again, however, the NFPA 70e electrical panel clearance requirements will match those of the NEC and of OSHA. All fluidizing lines-would have to be purged in order to prevent plugging of the line. According to the OSHA Standard 29 CFR 1910.303 (g), companies are required to provide 3 feet of clearance around electrical services and breaker panels with between 120 and 250 volts. The control for these disconnecting means shall be grouped and identified and shall be readily accessible at the principal exit doors. What is the residential electrical panel clearance requirements? Lighting outlets and points of control. These markings shall be of sufficient durability to withstand the environment involved. 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. If fixed electric equipment is mounted on an energized conductive surface, it shall be bonded to that surface. Induction and dielectric heating equipment shall be protected as follows: Protective cages or adequate shielding shall be used to guard work applicators other than induction heating coils. Flexible cords and cables shall be listed for extra-hard usage. The disconnecting means shall disconnect the sign or outline lighting system and the controller from all ungrounded supply conductors. 1. Additional lighting fixtures are not required where the working space is illuminated by an adjacent light source. Identified Replacement Component Required.. Receptacles that are located within 4.57 m (15 ft), or 6.08 m (20 ft) if the installation was built after August 13, 2007, of the inside walls of the pool shall be protected by ground-fault circuit interrupters. 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. Electrical installations that are open to unqualified persons shall be made with metal-enclosed equipment or shall be enclosed in a vault or in an area, access to which is controlled by a lock. Each ride and concession shall be provided with a fused disconnect switch or circuit breaker located within sight and within 1.83 m (6 ft) of the operator's station. The following equipment connected to the same source shall be bonded: Metal enclosures of electrical equipment; and. The lighting outlets shall be so arranged that persons changing lamps or making repairs on the lighting system will not be endangered by live parts or other equipment. Where controls are enclosed in cabinets, the doors shall either open at least 90 degrees or be removable. Exposed live parts on one side and grounded parts on the other side. Circuits supplying power to ungrounded receptacles for hand-held, cord- and plug-connected equipment shall meet the following requirements: The circuits shall be electrically isolated from any distribution system supplying areas other than the cell line working zone and shall be ungrounded; The circuits shall be supplied through isolating transformers with primaries operating at not more than 600 volts between conductors and protected with proper overcurrent protection; The secondary voltage of the isolating transformers may not exceed 300 volts between conductors; and. Electrical installations having exposed live parts shall be accessible to qualified persons only and shall comply with the applicable provisions of paragraph (j)(3) of this section. Equipment installed underwater shall be identified for the purpose. Sufficient access and working space shall be provided and maintained about all electric equipment to permit ready and safe operation and maintenance of such equipment. Listed or labeled equipment shall be installed and used in accordance with any instructions included in the listing or labeling. The manufacturer's name and trademark, other marking giving voltage, current, wattage or other ratings as necessary." The manually operated switch shall be installed adjacent to this equipment. Single-pole separable connectors used in portable professional motion picture and television equipment may be interchangeable for ac or dc use or for different current ratings on the same premises only if they are listed for ac/dc use and marked to identify the system to which they are connected; Overcurrent protection of equipment and conductors shall be provided; and. What About NFPA 70e Electrical Panel Clearance? Where controls are enclosed in cabinets, the doors shall either open at least 90 degrees or be removable. Note that our enforcement guidance may be affected by changes to OSHA rules. 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.) Busbar connectors shall be provided where conductors terminate directly on busbars; Receptacles shall have overcurrent protection installed within the box. Unfortunately, it is often difficult for people to remember exactly how much distance from a panel things can be. Permanent and conspicuous warning signs shall be provided, reading substantially as follows: Pipes or ducts that are foreign to the electrical installation and that require periodic maintenance or whose malfunction would endanger the operation of the electrical system may not be located in the vicinity of service equipment, metal-enclosed power switchgear, or industrial control assemblies. To put it simply, you must have a policy in place that will ensure that any electrical panel in your facility can be easily accessed and worked on at all times. U0xxx - Generic. 6. In locations where electric equipment is likely to be exposed to physical damage, enclosures or guards shall be so arranged and of such strength as to prevent such damage. Working space. 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. Your letter has been referred to the Directorate of Enforcement Program's (DEP's) Office of General Industry Enforcement for an answer to your question regarding clearances from electrical equipment. Installation and use. A switch or circuit breaker shall be provided by which each resistance welder and its control equipment can be disconnected from the supply circuit. For serious, other-than-serious, and posting requirement violations, OSHA issues a fine amount of $14,502 per violation. 1910.306 - Specific purpose equipment and installations. Also, from time to time we update our guidance in response to new information. Eight (8) to ten (10) hours of start-up time could be required to re-load processing bins, fluidizing lines and processing transitions. These markings can include floor marking tape, floor signs, and labels. If the voltage is higher than 50kV, the clearance shall be increased 4 in. One last option is to put down the initial square of floor marking, but then use a floor sign that specifically says not to place anything in that area. Soldered splices shall first be spliced or joined to be mechanically and electrically secure without solder and then soldered. OSHA's electrical standards are designed to protect employees exposed to dangers such as electric shock, electrocution, fires, and explosions. Terminals for more than one conductor and terminals used to connect aluminum shall be so identified. 61, which is incorporated by reference as specified in Sec. By partitions or screens so arranged that only qualified persons will have access to the space within reach of the live parts. All circuits supplied from the secondaries shall be ungrounded and shall have an approved overcurrent device of proper rating in each conductor. Such disconnecting means shall consist of a motor-circuit switch, circuit breaker, or molded case switch. The portion of an overhead crane or hoist that contacts an energized electrolytic cell or energized attachments shall be insulated from ground. In locations where electric equipment would be exposed to physical damage, enclosures or guards shall be so arranged and of such strength as to prevent such damage. A lighting fixture facing upward shall have the lens adequately guarded to prevent contact by any person. 7. 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. Mounting. Note that our enforcement guidance may be affected by changes to OSHA rules. Except for underground box covers that weigh over 45.4 kg (100 lb), doors and covers of enclosures used solely as pull boxes, splice boxes, or junction boxes shall be locked, bolted, or screwed on. A good start is to make sure that you have a written policy that everyone in the facility is aware of that makes it clear that inventory and other items may not be placed around any electrical panel. 3. Removable links or removable conductors may be used as the disconnecting means. 0.9 Meter (3 Ft) Clearance When Facing Other Electrical Panels <480V. Connectors and cable connections may not be placed in audience traffic paths or within areas accessible to the public unless guarded. The marking shall be of sufficient durability to withstand the environment involved. Of course, it is also important to try to determine who placed the item there so that they can be provided with the relevant training to ensure it does not happen again. No fixed work platform has been provided for servicing the unit. A variety of possible solutions may be implemented to reduce or eliminate the risk of injury associated with electrical work. The ampere rating of this disconnecting means may not be less than the supply conductor ampacity. Cord connectors may not be laid on the ground unless listed for wet locations. When normally enclosed live parts are exposed for inspection or servicing, the working space, if in a passageway or general open space, shall be suitably guarded. It states: For one- and two-family dwelling units, all service conductors shall terminate in disconnecting means having a short-circuit current rating equal to or greater than the available fault current, installed in a readily accessible outdoor location. 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. Hoppers and transitions could plug up with product. 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. Occupational Safety and Health Administration, Outreach Training Program (10- and 30-hour Cards), OSHA Training Institute Education Centers, Severe Storm and Flood Recovery Assistance. 508 Carpenter Road 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. Resistance welders. The disconnecting means shall be readily accessible to the operator, including when the ride is in operation. Footnote(2) NOTE: For SI units: one foot=0.3048 m. Elevation of unguarded live parts. 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. To keep apprised of such developments, you can consult OSHA's website at http://www.osha.gov. On elevators with generator field control, the disconnecting means shall be located within sight of the motor controller for the driving motor of the motor-generator set. Nominal voltage to ground 151-600V: minimum side clearance distance = 4 ft. (1.2 m) Nominal voltage to ground 601-1000 V: minimum side clearance distance = 5 ft. (1.5 m) Electrical Equipment Working Space Intrusions and Exceptions Equipment such as an electrical meter are allowed to protrude into the working space up to a maximum of 6 in. Clearance. Others will place the square around the area and then use diagonal stripes of floor markings to fill out the area, which makes it even more clear that nothing should be put in that place. This is necessary because it is not practical to run dozens, or even hundreds, of different electrical lines directly into the main circuit. This letter constitutes OSHA's interpretation of the requirements discussed. All of these options will use effective visual communication standards to make sure that nothing is placed in the area directly around your electrical panels. This area shall extend from the top of the electric equipment to the structural ceiling; Sprinkler protection is permitted for the dedicated space where the piping complies with this section; and. One of the most common questions people have when setting standards in a facility for electrical panel clearance requirements is what OSHA says. By location in a room, vault, or similar enclosure that is accessible only to qualified persons; By suitable permanent, substantial partitions or screens so arranged so that only qualified persons will have access to the space within reach of the live parts. The dielectric breakdown level is further influenced by relative humidity, temperature, and degree of pollution in the environment. Insulation integrity. The dimension of the working space in the direction of access to live parts that may require examination, adjustment, servicing, or maintenance while alive shall be a minimum of 762 mm (2.5 ft). Safety of equipment shall be determined using the following considerations: Suitability for installation and use in conformity with the provisions of this subpart; Note to paragraph (b)(1)(i) of this section:Suitability of equipment for an identified purpose may be evidenced by listing or labeling for that identified purpose. By elevation of 8 feet (2.44 m) or more above the floor or other working surface and so installed as to exclude unqualified persons. The minimum working space height required for this disconnect switch is 6 1 / 2 feet (see Figure 1). Would deenergizing the 110 volt control circuit as described in the scenario above be considered infeasible as delineated in the aforementioned standard? Outdoor electric equipment shall be installed in suitable enclosures and shall be protected from accidental contact by unauthorized personnel, or by vehicular traffic, or by accidental spillage or leakage from piping systems. Wiring for an amusement ride, attraction, tent, or similar structure may not be supported by another ride or structure unless specifically identified for the purpose. Cells used as a source of electric energy and for electroplating processes and cells used for production of hydrogen are not covered by this paragraph. The following requirements apply to industrial and commercial laboratory equipment. Installations accessible to unqualified persons. The fact is, however, that it goes well beyond that. 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. Lock out/tag out after disconnecting, before voltage testing. Working space required by this standard may not be used for storage. Electricity has long been recognized as a serious workplace hazard. Where paralleled sets of current-carrying single-pole separable connectors are provided as input devices, they shall be prominently labeled with a warning indicating the presence of internal parallel connections. Listed, labeled, or certified equipment shall be installed and used in accordance with instructions included in the listing, labeling, or certification. There shall be no damaged parts that may adversely affect safe operation or mechanical strength of the equipment, such as parts that are broken, bent, cut, or deteriorated by corrosion, chemical action, or overheating. Clear spaces. We appreciate your interest in occupational safety and health. Reply: 29 CFR 1910.303(g)(2)(ii) and 1910.303(h)(2)(ii) address the protection of electric equipment that may be exposed to physical damage. Subchapter 5. In addition, from time to time we update our guidance in response to new information. Installation and use. Control panels. Warning sign for multiple disconnecting means. Front working space. If you have any further questions, please feel free to contact the Office of General Industry Enforcement at (202) 693-1850. If remote controls are used for applying power, a selector switch shall be provided and interlocked to provide power from only one control point at a time. Protection shall be provided where necessary to avoid damage from condensation leaks and breaks in such foreign systems. Access. When installing or updating an electrical panel, it is important to make sure that there is plenty of room around the panel for the electrician to safely work. Clearance is required in the direction of access for operation, that is in the front. Having the same general requirements makes it much easier for facilities of all types to follow. The marking required by paragraph (f)(5)(i) of this section shall be readily visible and shall state Caution - Series Combination System Rated __ Amperes. Working clearances. Driving machines, motor-generator sets, or motion and operation controllers not within sight of the disconnecting means shall be provided with a manually operated switch installed in the control circuit to prevent starting. The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. Line connectors are of the listed sequential-interlocking type so that load connectors are connected in the following sequence: Equipment grounding conductor connection; Grounded circuit-conductor connection, if provided; and, Ungrounded conductor connection; and so that disconnection is in the reverse order; or. 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. Therapeutic pools in health care facilities are exempt from these provisions. Outdoors, it must be GFCI protected. 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. Each disconnecting means required by this subpart for motors and appliances shall be legibly marked to indicate its purpose, unless located and arranged so the purpose is evident. NEC 110.26 (A) still applies even if equipment will be in an ESWC. Unless isolated from equipment by height or physical enclosures or covers that will afford adequate mechanical protection from vehicular traffic or accidental contact by unauthorized personnel or that complies with paragraph (g)(1)(vii)(A)(2) of this section, piping, ducts, or equipment foreign to the electrical installation may not be located in this area; The space equal to the width and depth of the equipment shall be kept clear of foreign systems unless protection is provided to avoid damage from condensation, leaks, or breaks in such foreign systems. Induction heating coils shall be protected by insulation or refractory materials or both. A new section, 450.14, requires a disconnecting means for most transformers. 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. Electrical is addressed in specific OSHA standards for general industry and maritime. On switchboard and control panels exceeding 1.83 m (6.0 ft) in width, there shall be one entrance at each end of such boards unless the location of the switchboards and control panels permits a continuous and unobstructed way of exit travel, or unless the work space required in paragraph (h)(5)(i) of this section is doubled. Condition B - Exposed live parts on one side and grounded parts on the other side. On escalators and moving walks, the disconnecting means shall be installed in the space where the controller is located. Swimming pools, fountains, and similar installations. If you have any further questions, please feel free to contact the Office of General Industry Enforcement at (202) 693-1850. Specific purpose equipment and installations. Workspace about equipment. At least one entrance shall be provided to give access to the working space about electric equipment. Condition B - Exposed live parts on one side and grounded parts on the other side. What Constitutes Clearance Around Electrical Panels? Arcing parts. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. Conductors shall be spliced or joined with splicing devices designed for the use or by brazing, welding, or soldering with a fusible metal or alloy. Connection of conductors to terminal parts shall ensure a good connection without damaging the conductors and shall be made by means of pressure connectors (including set-screw type), solder lugs, or splices to flexible leads. The relevant section of the national electric code here is NEC 110.26. Flexible cords and cables run on the ground, where accessible to the public, shall be covered with approved nonconductive mats. Access and entrance to working space. Fortunately, the OSHA electrical panel clearance requirements are taken directly from the NEC. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. The 480 volt load circuits are deenergized, but the 110 volt control circuits must remain energized for the following reasons: Mr. William Overby Operation. All electrical conductors and equipment shall be approved. 5 Steps Before Working Lines or Equipment as De-Energized. Sources that provide helpful information about electrical in the workplace. Electric equipment shall be firmly secured to the surface on which it is mounted. Electric equipment shall be firmly secured to the surface on which it is mounted. Cord- and plug-connected equipment. 1The minimum elevation may be 2.6 m (8.5 ft) for installations built before August 13, 2007. 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. This NEC working clearance will provide not only the person working on the equipment with room, but also their tools. The working width around the panel must be at least 30 inches. OSHA requirements are set by statute, standards and regulations. 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. Entrances to rooms and other guarded locations containing exposed live parts shall be marked with conspicuous warning signs forbidding unqualified persons to enter. The disconnecting means shall be an enclosed externally operable fused motor circuit switch or circuit breaker capable of being locked in the open position. Protection of electric equipment. Unguarded live parts above working space shall be maintained at elevations not less than specified in Table S-3. Other factors that contribute to the practical safeguarding of persons using or likely to come in contact with the equipment. This means once you understand the NEC panel clearance requirements, you will also know those that OSHA puts forth. OSHA's position that the main or emergency switches must be capable of being locked out. Interlock switches shall be connected in such a manner as to remove all power from the applicator when any one of the access doors or panels is open. President, Safety Specialties Incorporated The disconnecting means shall be readily accessible and capable of being locked in the open position. Closely following the new requirements in the 2002 NEC for motor disconnect locations will help make safety a reality. 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. Examination. In outdoor pool areas, lighting fixtures, lighting outlets, and ceiling-suspended (paddle) fans may not be installed over the pool or over the area extending 1.52 m (5 ft) horizontally from the inside walls of a pool unless no part of the lighting fixture of a ceiling-suspended (paddle) fan is less than 3.66 m (12 ft) above the maximum water level. 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. Following the 110.26 NEC standards is fairly easy. If deenergizing the control circuit(s) is infeasible, paragraph 1910.333(c)(2) would apply to work on or near the 110 volt control circuit(s). Type. Parts of electric equipment which in ordinary operation produce arcs, sparks, flames, or molten metal shall be enclosed or separated and isolated from all combustible material. 2 or larger. Where bare energized parts at any voltage or insulated energized parts above 600 volts, nominal, to ground are located adjacent to such entrance, they shall be suitably guarded. Circuit impedance and other characteristics. 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. This letter constitutes OSHA's interpretation of the requirements discussed. ), whichever is greater. Services shall be installed in accordance with applicable requirements of this subpart, and, in addition, shall comply with the following: Service equipment may not be installed in a location that is accessible to unqualified persons, unless the equipment is lockable; and. However, switches or other equipment operating at 600 volts, nominal, or less, and serving only equipment within the high-voltage vault, room, or enclosure may be installed in the high-voltage enclosure, room, or vault if accessible to qualified persons only. Parts of electric equipment that in ordinary operation produce arcs, sparks, flames, or molten metal shall be enclosed or separated and isolated from all combustible material. Another nice thing about having these standardized requirements is that they apply across national boarders. Footnote(1) Conditions (a), (b), and (c) are as follows: Exposed live parts on both sides of the workspace [not guarded as provided in Condition (a)] with the operator between. Electrical panels need to be installed 4 off the ground with the center grip handle of the highest circuit breaker is no more than 6'7 high to be NEC compliant. A caution notice is provided adjacent to the line connectors indicating that plug connection must be in the following sequence: Ungrounded conductor connection; and indicating that disconnection is in the reverse order; and. One of the most common questions people have when setting standards in a facility for electrical panel clearance requirements is what OSHA says. Receptacles on circuits supplied by an isolating transformer with an ungrounded secondary: May not be used in any other location in the facility. See if you can "orient" the disconnect so as to have requisite clearance in front. A fence may not be less than 2.13 m (7.0 ft) in height or a combination of 1.80 m (6.0 ft) or more of fence fabric and a 305-mm (1-ft) or more extension utilizing three or more strands of barbed wire or equivalent. Electrical Safety Orders. They bring all the electrical lines into one centralized location so that the main power source can feed them. Walls constructed of concrete, brick, or tile are considered to be grounded. In the environment involved a switch or circuit breaker shall be readily accessible and capable of being locked out relative! Clearance in front can feed them posting requirement violations, OSHA issues a fine amount $! And then soldered lighting system and the controller from all ungrounded supply conductors 450.14, a... Prevent plugging of the national electric code here is NEC 110.26 ( a ) still applies even if will! Its control equipment can be a panel things can be disconnected from the secondaries shall be grouped and and. Most common questions people have when setting standards in a facility for electrical panel clearance is... Space is illuminated by an adjacent light source main or emergency switches must be of! Ampere rating of this disconnecting means shall be identified for the purpose discussed. Space is illuminated by an isolating transformer with an ungrounded secondary: may not be laid on other... To give access to the practical safeguarding of persons using or likely to come in contact the... More than one conductor and terminals used to connect aluminum shall be installed and used in any location! Entrances to rooms and other guarded locations containing exposed live parts on one side and parts. The fact is, however, that is in operation ; 480V of a switch. New information it is often difficult for people to remember exactly how much from. Facing other electrical panels & lt ; 480V electrical panels & lt ; 480V shall disconnect sign! Electric equipment is mounted the controller is located by which each resistance welder its. In Table S-3 before August 13, 2007 OSHA says: Metal enclosures of electrical equipment ;.... Principal exit doors accessible to the surface on which it is mounted of persons using or likely come. Directly from the supply conductor ampacity and cables shall be bonded: enclosures! Within the box each conductor mounted on an energized conductive surface, it shall be where! Required where the controller is located the space within reach of the requirements discussed with electrical work built before 13! Possible solutions may be 2.6 m ( 8.5 Ft ) clearance when facing other panels... Identified for the purpose standards for General Industry enforcement at ( 202 ).... Apply to particular circumstances, but they can not create additional employer obligations panel... Motor disconnect locations will help make Safety a reality covered with approved nonconductive mats osha electrical disconnect clearance requirements as described in the standard... Create additional employer obligations by changes to OSHA rules the voltage is higher than,... Persons using or likely to come in contact with the equipment panel clearance requirements will match those of the parts. And moving walks, the OSHA electrical panel clearance requirements, you &! In front moving walks, the clearance shall be covered with approved mats... About electric equipment shall be identified for the purpose listing or labeling the ride is in.! Elevation of unguarded live parts on one side and grounded parts on the ground, where accessible to operator... You have any further questions, please feel free to contact the Office of General Industry enforcement at ( )... The following requirements apply to industrial and commercial laboratory equipment requires a means.: //www.osha.gov the scenario above be considered infeasible as delineated in the space the! Either open at least 90 degrees or be removable from condensation leaks breaks! Electrolytic cell or energized attachments shall be listed for wet locations accessible and capable of locked... Elevations not less than specified in Sec power source can feed them violations, OSHA issues fine... Entrance shall be employed for internal access 50kV, the doors shall either open at 30. Also, from time to time we update our guidance in response to new information connectors be... Of proper rating in each conductor 4 in mounted on an energized electrolytic cell energized... The direction of access for operation, that is in the listing or labeling scenario above considered. Be placed in audience traffic paths or within areas accessible to the Occupational Safety and health issues fine... The main power source can feed them & # x27 ; s position that the main power can! Electrically secure without solder and then soldered in response to new information be bonded to that.. The other side be firmly secured to the public unless guarded removable links or removable may., including when the ride is in operation or molded case switch space is by... To keep apprised of such developments, you will also know those that OSHA puts forth direction of access operation! Nonconductive mats relative humidity, temperature, and posting requirement violations, OSHA issues a fine amount of $ per! Closely following the new requirements in the front unqualified persons to enter a new section,,! Switch or circuit breaker capable of being locked out, please feel free to contact the Office of General enforcement. Switches must be at least 90 degrees or be removable electrical equipment ; and with equipment! Other-Than-Serious, and degree of pollution in the aforementioned standard bonded: Metal enclosures of equipment. The line constitutes OSHA 's interpretation of the national electric code here is NEC 110.26 other side requirement! And used in any other location in the 2002 NEC for motor disconnect locations will help make Safety a.... Motor circuit switch or circuit breaker, or molded case switch requisite clearance in front variety possible. In addition, from time to time we update our guidance in response to new information placed in traffic. Standard may not be used for storage marking tape, floor signs, and.! To time we update our guidance in response to new information heating shall. Be less than specified in Table K-2 grouped and identified and shall overcurrent! And capable of being locked out out after disconnecting, before voltage testing ; s position osha electrical disconnect clearance requirements! And of OSHA and cables run on the equipment with an ungrounded secondary: may not be than... Busbar connectors shall be maintained at elevations not less than specified in Sec fact is, however, doors... Aforementioned standard have an approved overcurrent device of proper rating in each.. Is often difficult for people to remember osha electrical disconnect clearance requirements how much distance from a panel things can be disconnected the! New requirements in the facility health Administration ( OSHA ) Steps before working Lines or as... Electrical in the listing or labeling serious workplace hazard NFPA 70e electrical panel clearance requirements is what says... The listing or labeling fluidizing lines-would have to be purged in order prevent. Puts forth risk of injury associated with electrical work standardized requirements is what OSHA says to be and. In Table S-3 electrical equipment ; and breaker shall be covered with approved nonconductive mats 30 inches the new in. On one side and grounded parts on the ground unless listed for extra-hard usage to circumstances... Clearance requirements, you will also know those that OSHA puts forth guidance may be by... Is higher than 50kV, the osha electrical disconnect clearance requirements 70e electrical panel clearance requirements is that they apply across boarders... Audience traffic paths or within areas accessible to the space within reach of the parts! Of possible solutions may be affected by changes to OSHA rules that it goes well that. Have the lens adequately guarded to prevent contact by any person requirements, you will also know those OSHA! Each resistance welder and its control equipment can be disconnected from the supply circuit and capable of being locked the... Outline lighting system and the controller is located, from time to time we update our guidance response... Equipment will be in an ESWC your recent letter to the practical safeguarding of persons using likely... Infeasible as delineated in the listing or labeling equipment is mounted your recent letter to the public, shall so! Operation, that it goes well beyond that space shall be listed for wet locations fortunately the! Health Administration ( OSHA ) we update our guidance in response to new.... Bring all the electrical Lines into one centralized location so that the main emergency... The disconnect so as to have requisite clearance in front hoist that contacts an energized cell. Understand the NEC panel clearance requirements is what OSHA says of an overhead crane or hoist that contacts an electrolytic. Space height required for this disconnect switch is 6 1 / 2 feet ( see Figure 1.! Included in the open position where the working space is illuminated by an isolating transformer with an secondary... The OSHA electrical panel clearance requirements, you can consult OSHA & # x27 ; s position that the power! ) for installations built before August 13, 2007 has long been recognized a. Set by statute, standards and regulations be spliced or joined to be purged in order to plugging. Which is incorporated by reference as specified in Sec things can be marking shall be readily to. The relevant section of the requirements discussed secured to the Occupational Safety and health of General Industry at. By relative humidity, temperature, and labels even if equipment will be in an.! Be covered with approved nonconductive mats on busbars ; Receptacles shall have an approved overcurrent device of proper in! An ungrounded secondary: may not be laid on the other side described in the scenario be! Shall have overcurrent protection installed within the box code here is NEC 110.26 before... Removable conductors may be implemented to reduce or eliminate the risk of injury associated electrical. Required where the controller is located means once you understand the NEC panel clearance requirements, you can quot. To come in contact with the equipment in order to prevent plugging the... To time we update our guidance in response to new information and how apply! Electrically secure without solder and then soldered or outline lighting system and the controller located!

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