Lock out/tag out after disconnecting, before voltage testing. Where rear access is required to work on de-energized parts on the back of enclosed equipment, a minimum working space of 30 inches (762 mm) horizontally shall be provided. A ground-fault circuit interrupter shall be installed in the branch circuit supplying underwater fixtures operating at more than 15 volts. This means once you understand the NEC panel clearance requirements, you will also know those that OSHA puts forth. 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. ), whichever is greater. As a basic rule, there should be at least 3 feet of space in front of all equipment with a 30 inch width as well as 6 feet of headroom space. NEC 110.26 (A) still applies even if equipment will be in an ESWC. On elevators without generator field control, the disconnecting means shall be located within sight of the motor controller. Cooling. Another nice thing about having these standardized requirements is that they apply across national boarders. 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). Space about electric equipment. 508 Carpenter Road The workspace shall be adequate to permit at least a 90-degree opening of doors or hinged panels. The Occupational Safety and Health Administration is a part of the U.S. Department of Labor that makes workplace clearance requirements to help ensure the safety and health of employees. 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. Mechanical strength and durability, including, for parts designed to enclose and protect other equipment, the adequacy of the protection thus provided. OSHA's position that the main or emergency switches must be capable of being locked out. 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. Occupational Safety & Health Administration. Removable links or removable conductors may be used as the disconnecting means. 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. Metal-enclosed switchgear, unit substations, transformers, pull boxes, connection boxes, and other similar associated equipment shall be marked with appropriate caution signs. Walls constructed of concrete, brick, or tile are considered to be grounded surfaces. Horizontal clearance between the conductor and Building. Receptacles on circuits supplied by an isolating transformer with an ungrounded secondary: May not be used in any other location in the facility. Monitoring System (TPMS) Sensor Training in this section. The supply circuit switch may be used as the welder disconnecting means where the circuit supplies only one welder. Application. 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. 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. It shall also be protected by a ground-fault circuit interrupter installed in the branch circuit supplying the fixture. 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. Walls constructed of concrete, brick, or tile are considered to be grounded. Driving machines 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 adjacent to the equipment in order to prevent starting. All Rights Re 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. Installations accessible to qualified persons only. 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. Permanent and conspicuous warning signs shall be provided, reading substantially as follows: Pipes or ducts that are foreign to the electrical installation and that require periodic maintenance or whose malfunction would endanger the operation of the electrical system may not be located in the vicinity of service equipment, metal-enclosed power switchgear, or industrial control assemblies. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. Miles, Jr., Director 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. Hot glue machines would be shutdown and the glue would set. Installations covered by paragraph (h) of this section shall comply with all applicable provisions of this subpart, except as follows: Disconnecting means. 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. However, No. This page provides information that may aid in controlling electrical hazards in the workplace. 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. 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. wide and 1.98 m (6.5 ft) high shall be provided to give access to the working space about electric equipment. Working space required by this standard may not be used for storage. Disconnecting means. Fortunately, the OSHA electrical panel clearance requirements are taken directly from the NEC. The relevant section of the national electric code here is NEC 110.26. Interrupting rating. The working width around the panel must be at least 30 inches. Identification of manufacturer and ratings. Also, from time to time we update our guidance in response to new information. Filter by. Durability of markings. 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. These are generic codes which may not apply to all vehicles and we recommend you . Well, the switch will require maintenance as in cleaning, lubrication, inspection. 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. Soldered splices shall first be spliced or joined to be mechanically and electrically secure without solder and then soldered. Clearance. Auxiliary electric equipment, such as motors, transducers, sensors, control devices, and alarms, mounted on an electrolytic cell or other energized surface shall be connected to the premises wiring systems by any of the following means: Multiconductor hard usage or extra hard usage flexible cord; Wire or cable in suitable nonmetallic raceways or cable trays; or. Subchapter 5. 8. 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. If anything is found in a spot that is too close to the panel, the items can be moved right away. 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. Although there were no documented injuries to warrant this change, it's obvious that this requirement should enhance safety. 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. Electric equipment shall be installed in a neat and workmanlike manner. 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. 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 disconnecting means shall be a listed device. Approval. This NEC working clearance will provide not only the person working on the equipment with room, but also their tools. Other questions you can expect from an OSHA inspector include: The following requirements apply to elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts. Arcing parts. Internal parts of electrical equipment, including busbars, wiring terminals, insulators, and other surfaces, may not be damaged or contaminated by foreign materials such as paint, plaster, cleaners, abrasives, or corrosive residues. Protection shall be provided where necessary to avoid damage from condensation leaks and breaks in such foreign systems. Electricity has long been recognized as a serious workplace hazard. 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. 600 Volts, nominal, or less. 1910.305 (b): Wiring requirements for cabinets, boxes, and fittings. Cells used as a source of electric energy and for electroplating processes and cells used for production of hydrogen are not covered by this paragraph. This could be literally hundreds of machines. 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. Electrical panels are an essential component in any facility. 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. 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. Insulation integrity. 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. 2023 Electrical Safety Expert | All Rights Reserved, NEC + OSHA Electrical Panel Clearance Requirements, Understanding NEC Panel Clearance Requirements, OSHA Electrical Panel Clearance Requirements. Single-pole separable connectors used in portable professional motion picture and television equipment may be interchangeable for ac or dc use or for different current ratings on the same premises only if they are listed for ac/dc use and marked to identify the system to which they are connected; Overcurrent protection of equipment and conductors shall be provided; and. 3. OSHA Electrical Panel Clearance Requirements. The minimum working space height required for this disconnect switch is 6 1 / 2 feet (see Figure 1). Outdoor electrical installations having exposed live parts shall be accessible to qualified persons only. OSHA Requirements for Electrical Panel Floor Markings 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. Clear spaces. 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