Headroom. If anything is found in a spot that is too close to the panel, the items can be moved right away. AC systems supplying fixed and portable electric equipment within the cell line working zone; and. Mechanical strength and durability, including, for parts designed to enclose and protect other equipment, the adequacy of the protection thus provided. Electric equipment provided with ventilating openings shall be installed so that walls or other obstructions do not prevent the free circulation of air through the equipment. 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. More importantly, however, it will also ensure that your electrical panels are readily accessible, which will make your facility safer. OSHA Electrical Panel Clearance Requirements. 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. 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. A warning sign shall be mounted on or next to the disconnecting means where multiple disconnecting means are used and parts of the controllers remain energized from a source other than the one disconnected. If the disconnecting means is an integral part of the motor controller, it shall be operable without opening the enclosure. 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. Lock out/tag out after disconnecting, before voltage testing. Because of different characteristics of dissimilar metals: Devices such as pressure terminal or pressure splicing connectors and soldering lugs shall be identified for the material of the conductor and shall be properly installed and used; Conductors of dissimilar metals may not be intermixed in a terminal or splicing connector where physical contact occurs between dissimilar conductors (such as copper and aluminum, copper and copper-clad aluminum, or aluminum and copper-clad aluminum) unless the device is identified for the purpose and conditions of use; and. 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. 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. Where controls are enclosed in cabinets, the doors shall either open at least 90 degrees or be removable. 5. Other markings giving voltage, current, wattage, or other ratings as necessary. . 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. (10 cm) for every 10 kV over that voltage. These markings can include floor marking tape, floor signs, and labels. Standard Number: 1910.179 OSHA requirements are set by statute, standards and regulations. Placed within view of the runway contact conductors. 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. Defiance, Ohio 43512 Unguarded live parts above working space shall be maintained at elevations not less than specified in Table S-3. It also helps by segmenting the power off in a way that prevents a full power outage when there is an issue in one area. A box or fitting shall be installed at each connection point, outlet, switch point, or junction point. On elevators without generator field control, the disconnecting means shall be located within sight of the motor controller. Where doors are used giving access to voltages of over 1000 volts ac or dc, either mechanical lockouts with a disconnecting means to prevent access until circuit parts within the cubicle are deenergized, or both door interlocking and mechanical door locks, shall be provided. 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. 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. Disconnecting means required by this subpart shall be capable of being locked in the open position. Entrances to rooms and other guarded locations containing exposed live parts shall be marked with conspicuous warning signs forbidding unqualified persons to enter. The ampere rating of this disconnecting means may not be less than the nameplate current rating of the equipment. 0.9 Meter. Does it require maintenance while energized? Front working space. Marking. These are generic codes which may not apply to all vehicles and we recommend you . Interrupting rating. 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. Another safety focused agency is the National Fire Protection Association, or NFPA. The disconnecting means shall be readily accessible and capable of being locked in the open position. 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. No provision may be made to close this disconnecting means automatically (that is, power may only be restored by manual means). For the NEC 2020, there's an added article titled 230.85 Emergency Disconnects. Arc welders. Thank you for your recent letter to the Occupational Safety and Health Administration (OSHA). 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. 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. If the voltage is higher than 50kV, the clearance shall be increased 4 in. Where a pool is installed permanently at a dwelling unit, at least one 125-volt, 15- or 20-ampere receptacle on a general-purpose branch circuit shall be located a minimum of 3.05 m (10 ft) and not more than 6.08 m (20 ft) from the inside wall of the pool. 5 Steps Before Working Lines or Equipment as De-Energized. 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. Obstructed access to panelboards can prevent personnel from shutting down the source of power in the event of an accident. 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. 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. 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. Note that our enforcement guidance may be affected by changes to OSHA rules. 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. 2 or larger. The relevant section of the national electric code here is NEC 110.26. This paragraph applies to electric wiring for and equipment in or adjacent to all swimming, wading, therapeutic, and decorative pools and fountains; hydro-massage bathtubs, whether permanently installed or storable; and metallic auxiliary equipment, such as pumps, filters, and similar equipment. Our interpretations letters explain the requirements, and how they apply to particular circumstances, but they can not create additional employer obligations. 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. Because this cabinet you saw is located near an exit door, let's first look at OSHA's general requirements for exit routes, emergency action plans and fire prevention plans [20 CFR 1910.37-39]. Therapeutic pools in health care facilities are exempt from these provisions. If you have any further questions, please feel free to contact the Office of General Industry Enforcement at (202) 693-1850. The minimum headroom of working spaces about service equipment, switchboards, panelboards, or motor control centers shall be 6 feet 3 inches (1.91 m). 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. Rather than move the motor control center at a cost of two million dollars, can a "safe job procedure" which is audited periodically be considered an acceptable alternative or is a variance required? 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. Similarly, panels with 151-600 volts require 42 inches of clearance. 4. The workspace shall be adequate to permit at least a 90-degree opening of doors or hinged panels. 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. 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. This Live Performance Safety Guideline highlights sections of the OESC that apply to the temporary and innovative nature of the live performance industry. When the system is put back into production there is a chance of many more hazards developing that would have to be addressed. 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. Following the 110.26 NEC standards is fairly easy. Mr. William Overby Dedicated space: The space equal to the width and depth of electrical equipment in addition to the space extending from the floor to 6 feet . Q: Does OSHA standard 1910.303 include all electrical panels (i.e., electrical cabinets on machinery, electrical disconnects and breaker panels), or is it strictly related to breaker panels? Note that our enforcement guidance may be affected by changes to OSHA rules. 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. Control power is off on a large number of machines. The disconnecting means shall be capable of being locked in the open position. 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. Wooden plugs driven into holes in masonry, concrete, plaster, or similar materials shall not be used. A limit switch or other device shall be provided to prevent the load block from passing the safe upper limit of travel of any hoisting mechanism. What About NFPA 70e Electrical Panel Clearance? One of the most common questions people have when setting standards in a facility for electrical panel clearance requirements is what OSHA says. 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. Enclosure, 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. These markings shall be of sufficient durability to withstand the environment involved. 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. A disconnecting means shall be provided in the supply circuit. Many workers are unaware of the potential electrical hazards present in their work environment, which makes them more vulnerable to the danger of electrocution. 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. Where bare energized parts at any voltage or insulated energized parts above 600 volts are located adjacent to such entrance, they shall be guarded. Open conductors are prohibited except as part of a listed assembly or festoon lighting installed in accordance with 1910.304(c). To keep apprised of such developments, you can consult OSHA's website at http://www.osha.gov. The depth shall be as required in Table K-2. 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. 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. 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. Inside tents and concessions. 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. This means you cannot stack inventory in this area, you cannot park high-lows or other vehicles in the area, and you cannot even put temporary items in the area. This paragraph applies to X-ray equipment. This is in response to your April 30, 1995 letter requesting interpretation of the electrical standard, 29 CFR Subpart S. Your letter, which was addressed to Mr. Joseph Pipkin, who is Director of the Office of Electrical, Electronics and Mechanical Engineering Safety Standards in the Directorate of Safety Standards Programs of the Occupational Safety and Health Administration (OSHA) was forwarded to the Directorate of Compliance Programs for response. Electric equipment shall be installed in a neat and workmanlike manner. General. 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. 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. 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. Requirements for working clearances and spaces around electrical equipment, e.g., ladder cable trays. 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. Carnivals, circuses, fairs, and similar events. This is for ANY electrical panel including the corner of the condenser where the wiring enters. The marking shall be of sufficient durability to withstand the environment involved. Conductors shall be racked to provide ready and safe access in underground and subsurface enclosures that persons enter for installation and maintenance. 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 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. A single means to control both the electronic equipment and HVAC system is permitted. Elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts. Flexible cords and cables run on the ground, where accessible to the public, shall be covered with approved nonconductive mats. Not posting required clearances in electrical panel areas, generally falls under this type of violation. The following equipment connected to the same source shall be bonded: Metal enclosures of electrical equipment; and. Your safety manager or other designated individual should have a list of where all the electrical panels in the facility are located. Footnote(2) NOTE: For SI units: one foot=0.3048 m. Elevation of unguarded live parts. 0.9 Meter (3 Ft) The width of the workingspace in front of the Panel. Completed wiring installations shall be free from short circuits and from grounds other than those required or permitted by this subpart. 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. Specific purpose equipment and installations. 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. Note that our enforcement guidance may be affected by changes to OSHA rules. 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. July 26, 2004 Measuring off the required distance around the electrical panels and putting down floor markings will make it extremely easy to see exactly where things can and cannot be placed. Note to paragraph (j)(1) of this section: In determining these dimensions, the distance to be measured is the shortest path the supply cord of an appliance connected to the receptacle would follow without piercing a floor, wall, or ceiling of a building or other effective permanent barrier. Such disconnecting means shall consist of a motor-circuit switch, circuit breaker, or molded case switch. 1910.306 - Specific purpose equipment and installations. For serious, other-than-serious, and posting requirement violations, OSHA issues a fine amount of $14,502 per violation. 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. This page provides information that may aid in controlling electrical hazards in the workplace. 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. Visit the Electric Power Generation, Transmission and Distribution Standard Page Dayton, Ohio 45420 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. 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. 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. For failure to abate violations, the penalty amount is $14,502 per day beyond the abatement date. Metal frames and metal parts of rides, concessions, trailers, trucks, or other equipment that contain or support electrical equipment. Some facilities will simply place the tape in a square around the panel to show the necessary distance that needs to be kept clear. Detachable panels not normally used for access to such parts shall be fastened in a manner that will make them difficult to remove (for example, by requiring the use of tools). OSHA's electrical standards are designed to protect employees exposed to dangers such as electric shock, electrocution, fires, and explosions. 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. 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. The provisions of paragraphs (j)(2), (j)(3), and (j)(4) of this section do not apply to equipment on the supply side of the service conductors. This means that you cannot leave an area around the electrical panel that is clear, but have access to the area blocked off by stacks of boxes or other items. 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 designed for the purpose. The electric panel door must be able to open to a 90-degree angle. Insulated wire or insulated busbars operating at not over 300 volts are not considered live parts. This letter constitutes OSHA's interpretation of the requirements discussed. 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. 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. 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. If sprinklers are installed in hoistways, machine rooms, or machinery spaces, the disconnecting means may automatically open the power supply to the affected elevators prior to the application of water. 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. 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. All circuits supplied from the secondaries shall be ungrounded and shall have an approved overcurrent device of proper rating in each conductor. One of the main things that the NEC 110.26 specifies is that all electrical panels must have enough room around them that someone working on the equipment will have the room to safely access everything they need. General. 110-26 of the National Electrical Code (NEC): 1) at least a 3-ft clearance in front of all electrical equipment; 2) a 30 in.-wide working space in front of equipment operating at 600V or less; and 3) minimum headroom clearance of 6 ft or the height of the . Fortunately, the OSHA electrical panel clearance requirements are taken directly from the NEC. This receptacle shall be located not more than 1.98 m (6.5 ft) above the floor, platform, or grade level serving the pool. Arcing parts. 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. Pan Flexible cords and cables shall be continuous without splice or tap between boxes or fittings. 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. 508 Carpenter Road 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. Concrete, brick, and tile walls are considered as grounded surfaces. This paragraph applies to electric equipment operating at 600 volts, nominal, or less to ground. horizontally shall be provided. 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. Requesting clearance should be the first step. 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. OSHA Requirements for Electrical Panel Floor Markings 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. Mechanical strength and durability, including, for parts designed to enclose and protect other equipment, the adequacy of the protection thus provided; Heating effects under all conditions of use; Classification by type, size, voltage, current capacity, and specific use; and. 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. 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.
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