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. To keep apprised of such developments, you can consult OSHA's website at http://www.osha.gov. Unguarded live parts above working space shall be maintained at elevations not less than specified in Table K-3. 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. Services, feeders, and branch circuits. 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. The disconnecting means shall be an enclosed externally operable fused motor circuit switch or circuit breaker capable of being locked in the open position. Following the 110.26 NEC standards is fairly easy. Flexible cords and cables run on the ground, where accessible to the public, shall be covered with approved nonconductive mats. 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). Where the driving machine or the motor-generator set is located in a remote machinery space, a single means for disconnecting all ungrounded main power supply conductors shall be provided and be capable of being locked in the open position. Low-Voltage Electrical Safety Orders (Sections 2299 - 2599) Group 2. For equipment rated 1200 amperes or more and over 1.83 m (6.0 ft) wide, containing overcurrent devices, switching devices, or control devices, there shall be one entrance not less than 610 mm (24 in.) 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. 5 Steps Before Working Lines or Equipment as De-Energized. Concrete, brick, and tile walls are considered as grounded surfaces. For indoor installation, the dedicated space shall comply with the following: The space equal to the width and depth of the equipment and extending from the floor to a height of 1.83 m (6.0 ft) above the equipment or to the structural ceiling, whichever is lower, shall be dedicated to the electrical installation. 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. Monitoring System (TPMS) Sensor Training in this section. . 1Minimum depth of clear working space in front of electric equipment with a nominal voltage to ground above 25,000 volts may be the same as that for 25,000 volts under Conditions A, B, and C for installations built before April 16, 1981. Disconnecting means. Installation and use. 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. The fact is, however, that it goes well beyond that. 2 or larger. A box or fitting shall be installed at each connection point, outlet, switch point, or junction point. 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. Walls constructed of concrete, brick, or tile are considered to be grounded. 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. However, other equipment associated with the electrical installation and located above or below the electric equipment may extend not more than 153 mm (6 in.) The following hazards are the most frequent causes of electrical injuries: contact with power lines, lack of ground-fault protection, path to ground missing or discontinuous, equipment not used in manner prescribed, and improper use of extension and flexible cords. The workspace shall be adequate to permit at least a 90-degree opening of doors or hinged panels. The type of enclosure used in a given case shall be designed and constructed according to the hazards associated with the installation. OSHA 1910.179 General Requirements (Adapted from www.osha.gov) 1910.179. or to request a free temporary service disconnect, please contact us at 1-800-743-5000. Illumination shall be provided for all working spaces about service equipment, switchboards, panelboards, and motor control centers installed indoors. Occupational Safety and Health Administration, Outreach Training Program (10- and 30-hour Cards), OSHA Training Institute Education Centers, Severe Storm and Flood Recovery Assistance. Workspace about equipment. 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. Clearance. Where the driving machine is located in a remote machinery space, a single disconnecting means for disconnecting all ungrounded main power supply conductors shall be provided and be capable of being locked in the open position. Minimum clearance of 3 inches overhead and 2 inches laterally shall be provided and maintained between crane and obstructions in conformity with Crane Manufacturers Association of America, Inc, Specification No. Sincerely, Wire or cable in suitable metal raceways or metal cable trays installed with insulating breaks such that they will not cause a potentially hazardous electrical condition. The electric panel door must be able to open to a 90-degree angle. On a regular basis, they should go out and inspect the areas around them to make sure nothing has been placed where it should not go. 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. Defiance, Ohio 43512 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. No underwater lighting fixtures may be installed for operation at over 150 volts between conductors. 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. On escalators and moving walks, the disconnecting means shall be installed in the space where the controller is located. Diffraction- and irradiation-type equipment shall have a pilot light, readable meter deflection, or equivalent means to indicate when the equipment is energized, unless the equipment or installation is effectively enclosed or is provided with interlocks to prevent access to live current-carrying parts during operation. 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. Disconnecting means for runway conductors. Flexible cords and cables shall be continuous without splice or tap between boxes or fittings. Question: What would OSHA consider to be a safe distance for setting extra stock or empty containers from any electrical equipment such as ladder cable trays? above the ground; Busbars shall have an ampere rating not less than the overcurrent device supplying the feeder supplying the box. Soldered splices shall first be so spliced or joined as to be mechanically and electrically secure without solder and then soldered. For installations built on or after August 13, 2007, 1.98 m (6.5 ft), except that where the electrical equipment exceeds 1.98 m (6.5 ft) in height, the minimum headroom may not be less than the height of the equipment. NEC 110.26 (A) still applies even if equipment will be in an ESWC. Disconnecting means. These markings shall be of sufficient durability to withstand the environment involved. The disconnecting means shall open all ungrounded conductors simultaneously and shall be: Disconnecting means for cranes and monorail hoists. 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. A disconnecting means shall be provided for each motor and controller. Electrical Safety Orders. Where there is more than one driving machine in a machine room, the disconnecting means shall be numbered to correspond to the identifying number of the driving machine that they control. The overcurrent protective devices, the total impedance, the component short-circuit current ratings, and other characteristics of the circuit to be protected shall be selected and coordinated to permit the circuit protective devices used to clear a fault to do so without the occurrence of extensive damage to the electrical components of the circuit. On wheelchair lifts and stairway chair lifts, the disconnecting means shall be located within sight of the motor controller. Location. Taking the time to make sure that nothing is in these areas will help to avoid any type of penalties that may be issued if you are inspected by OSHA or other agencies. Lock out/tag out after disconnecting, before voltage testing. Protection of electric equipment. In previous NEC editions, transformers didn't require a disconnecting means. Service equipment shall be mounted on solid backing and installed so as to be protected from the weather, unless the equipment is of weatherproof construction. Most people think only about the area directly in front of the electrical panel. For serious, other-than-serious, and posting requirement violations, OSHA issues a fine amount of $14,502 per violation. Other markings giving voltage, current, wattage, or other ratings as necessary. Of course, this means having a lot of different wires and other electrical equipment located in one area. By partitions or screens so arranged that only qualified persons will have access to the space within reach of the live parts. 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. A new section, 450.14, requires a disconnecting means for most transformers. 2. It shall also be protected by a ground-fault circuit interrupter installed in the branch circuit supplying the fixture. 1. 1910.303 (g) (1) (vi) (B) For installations built on or after August 13, 2007, 1.98 m (6.5 ft), except that where the electrical equipment exceeds 1.98 m (6.5 ft) in height, the minimum headroom may not be less than the height of the equipment. Control equipment that by its very nature or because of other requirements in this subpart must be adjacent to or within sight of its operating machinery is permitted in the dedicated space. The 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. John B. Thank you for your interest in occupational safety and health. Lighting outlets and points of control. 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. For equipment designed for floor mounting, clearance between top surfaces and adjacent surfaces shall be provided to dissipate rising warm air. This is why OSHA has put a requirement that all electrical panels have a minimum of three feet (36 inches) of room from the front of the panel to the nearest obstacle . Limit switch. 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. This NEC working clearance will provide not only the person working on the equipment with room, but also their tools. Integrated electrical systems covered by 1910.308(g) need not have the disconnecting means required by paragraph (e)(1) of this section. The disconnecting means shall be within sight of the sign or outline lighting system that it controls. 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. 2023 Electrical Safety Expert | All Rights Reserved, NEC + OSHA Electrical Panel Clearance Requirements, Understanding NEC Panel Clearance Requirements, OSHA Electrical Panel Clearance Requirements. 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. If we can be of further assistance, please contact the Office of General Industry [at (202) 693-1850]. (10 cm) for every 10 kV over that voltage. horizontally shall be provided. OSHA requirements are set by statute, standards, and regulations. Engineers, electricians, and other professionals work with electricity directly, including working on overhead lines, cable harnesses, and circuit assemblies. Standard Number: 1910.179 OSHA requirements are set by statute, standards and regulations. Suitability of equipment for an identified purpose may be evidenced by listing, labeling, or certification for that identified purpose. The conductive surfaces of cranes and hoists that enter the cell line working zone need not be grounded. General. Any openings in such partitions or screens shall be so sized and located that persons are not likely to come into accidental contact with the live parts or to bring conducting objects into contact with them; By placement on a suitable balcony, gallery, or platform so elevated and otherwise located as to prevent access by unqualified persons; or. 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. Control. What is the residential electrical panel clearance requirements? Motor controller enclosures for escalators or moving walks may be located in the balustrade on the side located away from the moving steps or moving treadway. Fortunately, the OSHA electrical panel clearance requirements are taken directly from the NEC. To keep apprised of such developments, you can consult OSHA's website at https://www.osha.gov. Pan Dear Mr. Overby: Conductors shall be racked to provide ready and safe access in underground and subsurface enclosures that persons enter for installation and maintenance. Clearance distance helps prevent dielectric breakdown between electrodes caused by the ionization of air. Installations covered by paragraph (h) of this section shall comply with all applicable provisions of this subpart, except as follows: Disconnecting means. Employers may only use portable distribution and termination boxes that meet the following requirements: Occupational Safety & Health Administration. Visit the Electric Power Generation, Transmission and Distribution Standard Page Cooling. OSHA's electrical standards are designed to protect employees exposed to dangers such as electric shock, electrocution, fires, and explosions. This receptacle shall be located not more than 1.98 m (6.5 ft) above the floor, platform, or grade level serving the pool. This letter constitutes OSHA's interpretation of the requirements discussed. The NFPA is focused largely on reducing the risk of fires from occurring so that everyone can remain safe. You must also have a 120vac 15 amp service outlet within 25ft. Placed within view of the runway contact conductors. Warning sign for multiple disconnecting means. 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. Exception. A clearance of at least 3 feet is required for equipment using 120 to 250 volts. The manually operated switch shall be installed adjacent to this equipment. Type. 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. The marking shall be of sufficient durability to withstand the environment involved. 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. 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. No provision may be made to open or close this disconnecting means from any other part of the premises. 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. Three rules from the general industry electrical standard are among Oregon OSHA's top 25 violations every year: 1910.303 (b): Examination, installation, and use of equipment. Identification of manufacturer and ratings. This paragraph applies to equipment operating at 600 volts, nominal, or less. 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. Marking. "Infeasibility" is considered by OSHA on a case by case, work application basis. They bring all the electrical lines into one centralized location so that the main power source can feed them. Signs or outline lighting systems operated by electronic or electromechanical controllers located external to the sign or outline lighting system may have a disconnecting means located within sight of the controller or in the same enclosure with the controller. Carnivals, circuses, fairs, and similar events. In fact some employers go so far as to mark off a line on the floor or paint an area. On elevators without generator field control, the disconnecting means shall be located within sight of the motor controller. Wooden plugs driven into holes in masonry, concrete, plaster, or similar materials shall not be used. There should be at least three to three-and-a-half feet of clearance in front of all electrical disconnects and breaker panels. Keep the fire inside the fireplace. We hope you find this information helpful. Metal frames and metal parts of rides, concessions, trailers, trucks, or other equipment that contain or support electrical equipment. This paragraph applies to the installation of the electrical components and accessory equipment of electrolytic cells, electrolytic cell lines, and process power supply for the production of aluminum, cadmium, chlorine, copper, fluorine, hydrogen peroxide, magnesium, sodium, sodium chlorate, and zinc. 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. According to the National Electric Code, any electrical panel with 0 to 150 volts should have 36 inches of clearance around it for both the person working on it and their tools. 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. 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. Enclosure for electrical installations. 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. All temporary lamps for general illumination shall be protected from accidental breakage by a suitable fixture or lampholder with a guard. Fortunately, the OSHA electrical panel clearance requirements are taken directly from the NEC. The following requirements apply to industrial and commercial laboratory equipment. 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. Preventing Obstructions Around Electrical Panels, NEC 110.26 specifies is that all electrical panels, the NFPA 70e electrical panel clearance requirements, Floor Marking for Electrical Panel Compliance, Occupational Safety and Health Administration (OSHA). February 7, 1996 The marking required by paragraph (f)(5)(i) of this section shall be readily visible and shall state Caution - Series Combination System Rated __ Amperes. Unfortunately, it is often difficult for people to remember exactly how much distance from a panel things can be. For the NEC 2020, there's an added article titled 230.85 Emergency Disconnects. 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 7. OSHA standard 1910.303 clearance requirements apply to many types of electrical equipment, not just breaker panels. If the disconnecting means is an integral part of the motor controller, it shall be operable without opening the enclosure. At least one entrance not less than 24 inches (610 mm) wide and 6 feet 6 inches (1.98 m) high shall be provided to give access to the working space about electric equipment. We appreciate your interest in occupational safety and health. 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. Insulated wire or insulated busbars operating at not over 300 volts are not considered live parts. Remote crane or hoist controls that may introduce hazardous electrical conditions into the cell line working zone shall employ one or more of the following systems: Pendant pushbutton with nonconductive supporting means and with nonconductive surfaces or ungrounded exposed conductive surfaces; or. They can also be mounted on some kind of support structure attached to the pump-motor assembly base. Where circuit breakers or fuses are applied in compliance with the series combination ratings marked on the equipment by the manufacturer, the equipment enclosures shall be legibly marked in the field to indicate that the equipment has been applied with a series combination rating. Where rear access is required to work on deenergized parts on the back of enclosed equipment, a minimum working space of 762 mm (30 in.) Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. 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