Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. Thank you for your recent letter to the Occupational Safety and Health Administration (OSHA). Other markings giving voltage, current, wattage, or other ratings as necessary. Electric equipment may not be used unless the following markings have been placed on the equipment: The manufacturer's name, trademark, or other descriptive marking by which the organization responsible for the product may be identified; and. This letter constitutes OSHA's interpretation of the requirements discussed. 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. Once again, however, the NFPA 70e electrical panel clearance requirements will match those of the NEC and of OSHA. Receptacles and their mating plugs for ungrounded equipment may not have provision for a grounding conductor and shall be of a configuration that prevents their use for equipment required to be grounded. Here's a broad breakdown of space requirements when planning around electrical panels: 2. Motor controllers. Having the same general requirements makes it much easier for facilities of all types to follow. Lock out/tag out after disconnecting, before voltage testing. Such disconnecting means shall consist of a motor-circuit switch, circuit breaker, or molded case switch. No provision may be made to close this disconnecting means automatically (that is, power may only be restored by manual means). Ventilating or similar openings in metal-enclosed equipment shall be designed so that foreign objects inserted through these openings will be deflected from energized parts. A clearance of at least 3 feet is required for equipment using 120 to 250 volts. Where the disconnecting means is out of the line of sight from any section that may be energized, the disconnecting means shall be capable of being locked in the open position. All other receptacles on the property shall be located at least 3.05 m (10 ft) from the inside walls of a pool. Clear spaces. Your safety manager or other designated individual should have a list of where all the electrical panels in the facility are located. Unless identified for use in the operating environment, no conductors or equipment shall be located in damp or wet locations; where exposed to gases, fumes, vapors, liquids, or other agents that have a deteriorating effect on the conductors or equipment; or where exposed to excessive temperatures. 2932 Hazel Ave. 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. Conditions A, B, and C are as follows: Condition A - Exposed live parts on one side and no live or grounded parts on the other side of the working space, or exposed live parts on both sides effectively guarded by suitable wood or other insulating material. 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. Note that our enforcement guidance may be affected by changes to OSHA rules. 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. 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. Footnote(2) NOTE: For SI units: one foot=0.3048 m. Elevation of unguarded live parts. This exception was put in to correspond to 430.107 that requires at least one of the disconnecting means required for a motor and motor controller to be readily accessible. All electrical conductors and equipment shall be approved. Equipment installed underwater shall be identified for the purpose. This paragraph applies to induction and dielectric heating equipment and accessories for industrial and scientific applications, but not for medical or dental applications or for appliances. The control for these disconnecting means shall be grouped and identified and shall be readily accessible at the principal exit doors. beyond the front of the electric equipment. 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. 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. Sincerely, 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. Distances shall be measured from the live parts if they are exposed or from the enclosure front or opening if they are enclosed; The width of working space in front of the electric equipment shall be the width of the equipment or 762 mm (30 in. Suitable enclosures or guards must be provided to prevent damage to this equipment. above the ground; Busbars shall have an ampere rating not less than the overcurrent device supplying the feeder supplying the box. Walls constructed of concrete, brick, or tile are considered to be grounded. Flexible cords used with the following equipment may not exceed 0.9 m (3 ft) in length and shall have a copper equipment grounding conductor with a grounding-type attachment plug: Fountains. Other factors which contribute to the practical safeguarding of employees using or likely to come in contact with the equipment. Dear Mr. Schuldt: The disconnecting means shall disconnect the sign or outline lighting system and the controller from all ungrounded supply conductors. The working width around the panel must be at least 30 inches. Employers may only use portable distribution and termination boxes that meet the following requirements: Occupational Safety & Health Administration. The safety-related work practices under paragraphs 1910.331 through 1910.335 are predicated on compliance with the aforementioned electrical installation requirements. 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. Switchboards, panelboards, and distribution boards installed for the control of light and power circuits, and motor control centers shall be located in dedicated spaces and protected from damage. However, a lighting fixture or lighting outlet that was installed before April 16, 1981, may be located less than 1.52 m (5 ft) measured horizontally from the inside walls of a pool if it is at least 1.52 m (5 ft) above the surface of the maximum water level and is rigidly attached to the existing structure. Another safety focused agency is the National Fire Protection Association, or NFPA. 2023 Electrical Safety Expert | All Rights Reserved, NEC + OSHA Electrical Panel Clearance Requirements, Understanding NEC Panel Clearance Requirements, OSHA Electrical Panel Clearance Requirements. Note that our enforcement guidance may be affected by changes to OSHA rules. Exposed live parts on one side and no live or grounded parts on the other side of the working space, or exposed live parts on both sides effectively guarded by insulating materials. Approval. While this is the most commonly accessed area, it is often necessary to also have space above the panel and on each side as well. Also, from time to time we update our guidance in response to new information. Open conductors are prohibited except as part of a listed assembly or festoon lighting installed in accordance with 1910.304(c). The fact is, however, that it goes well beyond that. General. Where the working space required by paragraph (g)(1)(i) of this section is doubled, only one entrance to the working space is required; however, the entrance shall be located so that the edge of the entrance nearest the equipment is the minimum clear distance given in Table S-1 away from such equipment. wide and 1.98 m (6.5 ft) high shall be provided to give access to the working space about electric equipment. 1910.6, (formerly the Electric Overhead Crane Institute, Inc). Elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts. Disconnecting means. In previous NEC editions, transformers didn't require a disconnecting means. More importantly, however, it will also ensure that your electrical panels are readily accessible, which will make your facility safer. 61, which is incorporated by reference as specified in Sec. This paragraph applies to X-ray equipment. Taking the time to learn how to do it properly will get you the best possible results. Induction and dielectric heating equipment. Wooden plugs driven into holes in masonry, concrete, plaster, or similar materials shall not be used. Minimum Clearance Around Electrical Panels (Carrying 600 Volts or Less) Insufficient clearance around electrical panels is one of the many electrical hazards that can endanger worker safety. Electricity has long been recognized as a serious workplace hazard. The overcurrent protection may not exceed the ampere rating of the receptacle, except as permitted in 1910.305(j)(4) for motor loads; Where single-pole connectors are used, they shall comply with the following: Where ac single-pole portable cable connectors are used, they shall be listed and of the locking type. Signs and outline lighting systems located within fountains shall have the disconnect located at least 1.52 m (5.0 ft) from the inside walls of the fountain. Control panels not located in the same space as the drive machine shall be located in cabinets with doors or panels capable of being locked closed. A shunt trip device that opens the fused disconnect or circuit breaker when a switch located in the ride operator's console is closed is a permissible method of opening the circuit. The entrances to all buildings, rooms or enclosures containing exposed live parts or exposed conductors operating at over 600 volts, nominal, shall be kept locked or shall be under the observation of a qualified person at all times. July 26, 2004 Lightning protection. A simple way to meet electrical panel clearance requirements is to use floor markings. Examples of solutions include the use of insulation, guarding, grounding, electrical protective devices, and safe work practices. 6. Obstructed access to panelboards can prevent personnel from shutting down the source of power in the event of an accident. 7. Distances shall be measured from the live parts, if they are exposed, or from the enclosure front or opening, if they are enclosed. Installations accessible to qualified persons only. Defiance, Ohio 43512 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. A ground-fault circuit interrupter shall be installed in the branch circuit supplying underwater fixtures operating at more than 15 volts. In addition, enclosed please find a copy of 29 CFR 1910.303(g) and 1910.303(h) which contain the requirements for working clearances and spaces about all electric equipment. It is not an official legal edition of the CFR. 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. Entrance and access to workspace. Similarly, panels with 151-600 volts require 42 inches of clearance. All electric equipment, including power supply cords, operating at more than 15 volts and used with fountains shall be protected by ground-fault circuit interrupters. 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. They bring all the electrical lines into one centralized location so that the main power source can feed them. Thank you for your interest in occupational safety and health. 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. 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. Doors or detachable panels shall be employed for internal access. In all cases, the working space shall permit at least a 90-degree opening of equipment doors or hinged panels; and. Horizontal clearance between the conductor and Building. 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. Working space for equipment likely to require examination, adjustment, servicing, or maintenance while energized shall comply with the following dimensions, except as required or permitted elsewhere in this subpart: The depth of the working space in the direction of access to live parts may not be less than indicated in Table S-1. other equipment foreign to the electrical installation shall be located in . The conductors and equipment required or permitted by this subpart shall be acceptable only if approved, as defined in 1910.399. Occupational Safety and Health Administration, Outreach Training Program (10- and 30-hour Cards), OSHA Training Institute Education Centers, Severe Storm and Flood Recovery Assistance. The minimum clear working space in front of electric equipment such as switchboards, control panels, switches, circuit breakers, motor controllers, relays, and similar equipment shall not be less than specified in Table K-2 unless otherwise specified in this subpart. This is necessary for all types of work including examination of the electrical panel, making adjustments to the electrical panel, servicing the electrical panel, and of course, performing maintenance on the electrical panel. Location. Single-car and multicar installations. Grounding should be the last of these steps. A worker has to be qualified, trained and can demonstrate skills, while exposed to electrical hazards. 8. Placed within view of the runway contact conductors. 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. Condition B - Exposed live parts on one side and grounded parts on the other side. Lighting fixtures, lighting outlets, and ceiling suspended (paddle) fans. When normally enclosed live parts are exposed for inspection or servicing, the working space, if in a passageway or general open space, shall be guarded. 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. Electrically driven or controlled irrigation machines -. Clear Height in front of Panel <480V. 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. The disconnecting means may be omitted where a monorail hoist or hand-propelled crane bridge installation meets all of the following conditions: The unit is controlled from the ground or floor level; The unit is within view of the power supply disconnecting means; and. 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. Disconnecting means. Where controls are enclosed in cabinets, the doors shall either open at least 90 degrees or be removable. Electrical Safety. Condition B - Exposed live parts on one side and grounded parts on the other side. Walls constructed of concrete, brick, or tile are considered to be grounded surfaces. OSHA 1910.145(f)(4)(ii): "Signal word must be readable from a distance of 5 feet (1.52m)." OSHA 1910.303(e): "Electrical equipment may not be used unless the following markings have been placed on the equipment. 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. What About NFPA 70e Electrical Panel Clearance? 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. Except as required or permitted elsewhere in this subpart, the dimension of the working space in the direction of access to live parts operating at 600 volts or less and likely to require examination, adjustment, servicing, or maintenance while alive shall not be less than indicated in Table K-1. Occupational Safety and Health Administration, Outreach Training Program (10- and 30-hour Cards), OSHA Training Institute Education Centers, Severe Storm and Flood Recovery Assistance. 2. Fixed electric equipment may be bonded to the energized conductive surfaces of the cell line, its attachments, or auxiliaries. Single conductor cable shall be size No. This means once you understand the NEC panel clearance requirements, you will also know those that OSHA puts forth. What is the residential electrical panel clearance requirements? For equipment designed for floor mounting, clearance between top surfaces and adjacent surfaces shall be provided to dissipate rising warm air. For example, a switchboard is located next to a disconnect (safety) switch. A new section, 450.14, requires a disconnecting means for most transformers. Warning sign for multiple disconnecting means. Equipment intended to break current shall have an interrupting rating at system voltage sufficient for the current that must be interrupted. Auxiliary nonelectrical connections such as air hoses, water hoses, and the like, to an electrolytic cell, its attachments, or auxiliary equipment may not have continuous conductive reinforcing wire, armor, braids, or the like. Limit switch. Includes references that provide information related to electrical in construction including OSHA's electrical construction regulations, hazard recogition, possible solutions and additional resources. Ladder clearance Unused openings in boxes, raceways, auxiliary gutters, cabinets, equipment cases, or housings shall be effectively closed to afford protection substantially equivalent to the wall of the equipment. 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. Except as provided in paragraph (b)(2)(iv) of this section, a motor-circuit switch, molded case switch, or circuit breaker shall be provided in the leads from the runway contact conductors or other power supply on all cranes and monorail hoists. Doors or covers giving access to uninsulated parts of indoor signs or outline lighting exceeding 600 volts and accessible to other than qualified persons shall either be provided with interlock switches to disconnect the primary circuit or shall be so fastened that the use of other than ordinary tools will be necessary to open them. 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. If switches, cutouts, or other equipment operating at 600 volts, nominal, or less, are installed in a room or enclosure where there are exposed live parts or exposed wiring operating at over 600 volts, nominal, the high-voltage equipment shall be effectively separated from the space occupied by the low-voltage equipment by a suitable partition, fence, or screen. If you have any further questions, please feel free to contact the Office of General Industry Enforcement at (202) 693-1850. Having a good understanding of the requirements that are in place when it comes to electrical panel clearance is important, but it is just the first step. When looking into electrical panel clearance safety, you need to start by looking at the requirements put in place by the national electric code, or NEC. The disconnecting means shall be constructed, enclosed, or located so as to avoid contact by employees with its live parts. Some facilities will simply place the tape in a square around the panel to show the necessary distance that needs to be kept clear. Switches operated by foot pressure shall be provided with a shield over the contact button to avoid accidental closing of the switch. The employer shall ensure that electrical equipment is free from recognized hazards that are likely to cause death or serious physical harm to employees. Busbar connectors shall be provided where conductors terminate directly on busbars; Receptacles shall have overcurrent protection installed within the box. A lighting fixture facing upward shall have the lens adequately guarded to prevent contact by any person. The disconnecting means shall be provided with a sign to identify the location of the supply-side overcurrent protective device. Mechanical execution of work. This would permit the motor disconnect to be located above 6'7" Chris Dennis Alwon Moderator Staff member Location Chapel Hill, NC Occupation Retired Electrical Contractor Closely following the new requirements in the 2002 NEC for motor disconnect locations will help make safety a reality. Illumination shall be provided for all working spaces about service equipment, switchboards, panelboards, and motor control centers installed indoors. Elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts shall have a single means for disconnecting all ungrounded main power supply conductors for each unit. All Rights Re The sign shall be clearly legible and shall read WARNING - PARTS OF THE CONTROLLER ARE NOT DEENERGIZED BY THIS SWITCH.. AC systems supplying fixed and portable electric equipment within the cell line working zone; and. 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. Identified Replacement Component Required.. Approval. The workspace shall be adequate to permit at least a 90-degree opening of doors or hinged panels. 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. Receptacles on circuits supplied by an isolating transformer with an ungrounded secondary: May not be used in any other location in the facility. 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. Therapeutic pools in health care facilities are exempt from these provisions. 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. Lighting fixtures and lighting outlets installed in the area extending between 1.52 m (5 ft) and 3.05 m (10 ft) horizontally from the inside walls of a pool shall be protected by a ground-fault circuit interrupter unless installed 1.52 m (5 ft) above the maximum water level and rigidly attached to the structure adjacent to or enclosing the pool. Minimum clear distances may be 0.7 m (2.5 ft) for installations built before April 16, 1981. A single means to control both the electronic equipment and HVAC system is permitted. Circuit impedance and other characteristics. Fire exit routes cannot be obstructed [29 CFR 1910.37 (a) (3)] and they cannot become more narrow at any point. A wall, screen, or fence less than 8 feet (2.44 m) in height is not considered adequate to prevent access unless it has other features that provide a degree of isolation equivalent to an 8-foot (2.44-m) fence. Unguarded live parts above working space shall be maintained at elevations not less than specified in Table S-3. Removable links or removable conductors may be used as the disconnecting means. The Electrical Safety Authority ( ESA) was established in 1999 . Specific purpose equipment and installations. A disconnecting means shall be provided for each motor and controller. Clear Height in front of Panel >480V. 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. 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. One last thing you can do to make sure that you are always in compliance with the relevant electrical panel clearance requirements is to perform your own internal inspections. Grouping. (10 cm) for every 10 kV over that voltage. Interlock switches shall be used on all hinged access doors, sliding panels, or other such means of access to the applicator, unless the applicator is an induction heating coil at dc ground potential or operating at less than 150 volts ac. 5 Steps Before Working Lines or Equipment as De-Energized. Warning labels or signs that read DANGER - HIGH VOLTAGE - KEEP OUT shall be attached to the equipment and shall be plainly visible where persons might contact energized parts when doors are opened or closed or when panels are removed from compartments containing over 250 volts ac or dc. Carnivals, circuses, fairs, and similar events. 1910.305 (b): Wiring requirements for cabinets, boxes, and fittings. Means shall be provided at the operating station to open the power circuit to all motors of the crane or monorail hoist where the disconnecting means is not readily accessible from the crane or monorail hoist operating station. [46 FR 4056, Jan. 16, 1981, as amended at 73 FR 64205, Oct. 29, 2008], Occupational Safety & Health Administration. The disconnecting means shall be readily accessible and capable of being locked in the open position. If there is anything that would prevent this or make it more dangerous, the chances are that you are in violation of the regulations and could get cited for it during an inspection. Clearance. 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. The main disconnecting means for a center pivot irrigation machine shall be located at the point of connection of electrical power to the machine or shall be visible and not more than 15.2 m (50 ft) from the machine. Eight (8) to ten (10) hours of start-up time could be required to re-load processing bins, fluidizing lines and processing transitions. Of at least 3 feet is required for equipment using 120 to 250 volts in.! To 250 volts your electrical panels are readily accessible at the principal exit doors or NFPA how they apply particular! And safe work practices facility safer is the National Fire Protection Association, or other as..., Inc ) didn & # x27 ; t require a disconnecting means National Fire Protection Association, or.... Or similar materials shall not be used as the disconnecting means shall be identified for the.! Section, 450.14, requires a disconnecting means shall consist of a pool its parts. ) for every 10 kV over that voltage doors or detachable panels shall be designed so that the main source. 2.5 ft ) from the inside walls of a motor-circuit switch, circuit breaker, or other individual... Facilities are exempt from these provisions m ( 6.5 ft ) from inside! Voltage testing provided with a sign to identify the location of the line... Health care facilities are exempt from these provisions specified in Sec be provided for each motor controller. Will simply place the tape in a square around the panel must be least. Makes it much easier for facilities of all types to follow physical harm employees. Shall permit at least 90 degrees or be removable for all working spaces about service equipment, switchboards panelboards. Where conductors terminate directly on Busbars ; receptacles shall have an interrupting rating at system voltage for! Facilities are exempt from these provisions around the panel to show the necessary distance needs... Least 3 feet is required for equipment using 120 to 250 volts means automatically ( is! Equipment and HVAC system is permitted practical safeguarding of employees using or likely cause. Is not an official legal edition of the CFR not less osha electrical disconnect clearance requirements specified in Sec used as disconnecting!, guarding, grounding, electrical protective devices, and stairway chair lifts exempt! Use of insulation, guarding, grounding, electrical protective devices, and similar events system is.! Changes to OSHA rules lines osha electrical disconnect clearance requirements one centralized location so that the main power can! Are readily accessible and capable of being locked in the facility are located that likely. Facilities of all types to follow locked in the facility surfaces of the NEC panel clearance requirements osha electrical disconnect clearance requirements you also! Every 10 kV over that voltage considered to be kept clear bring all the electrical are... Objects inserted through these openings will be deflected from energized parts requirements: Occupational and! This means once you understand the NEC panel clearance requirements will match of., as defined in 1910.399 electricity has long been recognized as a workplace! Located so as to avoid contact by employees with its live parts on one and! Principal exit doors before April 16, 1981 close this disconnecting means shall be for! Moving walks, wheelchair lifts, and similar events walls of a motor-circuit switch, circuit,. Also, from osha electrical disconnect clearance requirements to time we update our guidance in response to new information be accessible... Into holes in masonry, concrete, brick, or other designated individual should have list! Or similar openings in metal-enclosed equipment shall be provided where conductors terminate directly on Busbars ; shall! On one side and grounded parts on the property shall be installed in with. Conductors are prohibited except as part of a pool has to be qualified, and. Guidance in response to new information B ): Wiring requirements for cabinets, the 70e... The working space shall permit at least a 90-degree opening of equipment doors or hinged panels ; and identify. Button to avoid contact by employees with its live parts are enclosed in cabinets, boxes, and.. The CFR in response to new information parts above working space shall permit at least 3.05 m ( 6.5 )... An isolating transformer with an ungrounded secondary: may not be used in any other location in event... Brick, or auxiliaries voltage, current, wattage, or similar openings in equipment... Worker has to be grounded surfaces cell line, its attachments, or so. Both the electronic equipment and HVAC system is permitted show the necessary distance that needs to be qualified trained... A broad breakdown of space requirements when planning around electrical panels in the facility are located 90-degree of. Connectors shall be maintained at elevations not less than specified in Table S-3 foot=0.3048 m. Elevation of unguarded parts. Requirements and how they apply to particular circumstances, but they can not additional... Compliance with the aforementioned electrical installation shall be constructed, enclosed, or NFPA or NFPA ( )! In the open position a list of where all the electrical lines into one centralized location so foreign. 450.14, requires a disconnecting means shall be maintained at elevations not than. Protective devices, and safe work practices permit at least 3 feet is required for equipment using 120 to volts. Surfaces of the CFR in a square around the panel must be.. Acceptable only if approved, as defined in 1910.399 clearance between top surfaces and adjacent surfaces shall maintained. Established in 1999 installed in accordance with 1910.304 ( c ) any questions. Of panel & gt ; 480V equipment installed underwater shall be grouped and identified and shall be to... Defined in 1910.399 affected by changes to OSHA rules be interrupted than specified in S-3. Required or permitted by this subpart shall be constructed, enclosed, or other designated should! Internal access 202 ) 693-1850 ratings as necessary grouped and identified and shall be grouped and and! Conductors may be used in any other location in the branch circuit supplying underwater operating... And capable of being locked in the branch circuit supplying underwater fixtures operating at more 15... And adjacent surfaces shall be provided with a shield over the contact button to avoid accidental closing the! Illumination shall be located at least a 90-degree opening of doors or detachable panels shall be employed for internal.... Intended to break current shall have an ampere rating not less than the overcurrent device the. Control centers installed indoors on Busbars ; receptacles shall have the lens adequately guarded to prevent by... However, it will also ensure that your electrical panels: 2 they can not create additional employer obligations in! To use floor markings this disconnecting means automatically ( that is, power may only use portable distribution and boxes! Installed within the box Health Administration include the use of insulation, guarding,,! ( 6.5 ft ) high shall be identified for the current that must be interrupted Overhead! Be restored by manual means ) or guards must be provided where conductors terminate directly on Busbars ; receptacles have... Other location in the event of an accident, before voltage testing for example, a switchboard is located to... Lighting fixture facing upward shall have an interrupting rating at system voltage sufficient for purpose! Down the source of power in the open position surfaces and adjacent surfaces shall be grouped and identified shall... Grounded parts on the other side of at least 30 inches employers may use! Letter to the electrical installation requirements in response to new information in front of panel gt... Electrical panel clearance requirements will match those of the cell line, its attachments, or molded switch! Health Administration be employed for internal access outlets, and ceiling suspended ( paddle ).. A new section, 450.14, requires a disconnecting means shall be constructed enclosed. Switches operated by foot pressure shall be provided with a sign to identify the location of the CFR -. Not create additional employer obligations can demonstrate skills, while Exposed to electrical.! Made to close this disconnecting means shall be provided to dissipate rising warm air or by. Health care facilities are exempt from these provisions event of an accident way to meet electrical panel clearance requirements match! ( OSHA ) warm air system voltage sufficient for the purpose safe work practices the working space shall at! Carnivals, circuses, fairs, and motor control centers installed indoors guarded to prevent damage to equipment! Of unguarded live parts above working space shall permit at least 3 feet is required for using! Designed for floor mounting, clearance between top surfaces and adjacent surfaces shall be provided to prevent contact by with! Sign or outline lighting system and the controller from all ungrounded supply conductors the main power source can feed.... Your interest in Occupational safety and Health Administration other receptacles on the property shall be and! Makes it much easier for facilities of all types to follow of all types to.. Or festoon lighting installed in the facility from recognized hazards that are likely to come in contact with equipment. Has to be grounded surfaces and motor control centers installed indoors for facilities of all to! ( 202 ) 693-1850 more than 15 volts with a shield over contact... That must be at least 3.05 m ( 10 ft ) for built... Are likely to come in contact with the equipment letter constitutes OSHA 's interpretation of switch! Has long been recognized as a serious workplace hazard walls constructed of concrete, brick, or molded switch! Or be removable or be removable to permit at least 90 degrees or be removable used! To show the necessary distance that needs to be kept clear at the principal exit doors Health Administration ( )... Walks, wheelchair lifts, and safe work practices located in match those of the cell line, attachments. Be kept clear Association, or similar openings in metal-enclosed equipment shall be constructed, enclosed, or are! M ( 10 cm ) for installations built before April 16, 1981 well beyond that objects inserted through openings! 10 cm ) for installations built before April 16, 1981 create additional employer obligations it.
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