Specific purpose equipment and installations. 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. 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 disconnecting means shall be capable of being locked in the open position. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. Also, from time to time we update our guidance in response to new information. Note that our enforcement guidance may be affected by changes to OSHA rules. U0xxx - Generic. 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. Parts of electric equipment which in ordinary operation produce arcs, sparks, flames, or molten metal shall be enclosed or separated and isolated from all combustible material. Once again, however, the NFPA 70e electrical panel clearance requirements will match those of the NEC and of OSHA. Other factors that contribute to the practical safeguarding of persons using or likely to come in contact with the equipment. OSHA's electrical standards are designed to protect employees exposed to dangers such as electric shock, electrocution, fires, and explosions. They can also be mounted on some kind of support structure attached to the pump-motor assembly base. In addition, from time to time we update our guidance in response to new information. 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. At least one entrance not less than 610 mm (24 in.) The following requirements apply to elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts. The sign shall be clearly legible and shall read WARNING - PARTS OF THE CONTROLLER ARE NOT DEENERGIZED BY THIS SWITCH.. To keep apprised of such developments, you can consult OSHA's website at http://www.osha.gov. Such disconnecting means shall consist of a motor-circuit switch, circuit breaker, or molded case switch. This paragraph covers the installation of portable wiring and equipment, including wiring in or on all structures, for carnivals, circuses, exhibitions, fairs, traveling attractions, and similar events. Here's a broad breakdown of space requirements when planning around electrical panels: In addition, from time to time we update our guidance in response to new information. In order to remain in compliance with the relevant regulations, you cannot put anything in the space around an electrical panel. Arcing parts. July 26, 2004 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. No architectural appurtenance or other equipment may be located in the working space required by paragraph (g)(1)(i) of this section. High-Voltage Electrical Safety Orders (Sections 2700 - 2989) Richard E. Fairfax, Director If equipment is exposed to physical damage from vehicular traffic, guards shall be provided to prevent such damage. Unguarded live parts above working space shall be maintained at elevations not less than specified in Table S-3. Interconnection between multicar controllers. Electric equipment shall be installed in a neat and workmanlike manner. A box or fitting shall be installed at each connection point, outlet, switch point, or junction point. The disconnecting means shall be readily accessible and capable of being locked in the open position. A readily accessible disconnecting means shall be provided by which each heating equipment can be isolated from its supply circuit. Does it require maintenance while energized? Therapeutic pools in health care facilities are exempt from these provisions. In all cases, the working space shall permit at least a 90-degree opening of equipment doors or hinged panels; and. 1910.6, (formerly the Electric Overhead Crane Institute, Inc). Where there are live parts normally exposed on the front of switchboards or motor control centers, the working space in front of such equipment shall not be less than 3 feet (914 mm). A single means to control both the electronic equipment and HVAC system is permitted. 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. When employees are trained to work safely, through the requirements, they should be able to anticipate and avoid injury from job related hazards. 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. Another safety focused agency is the National Fire Protection Association, or NFPA. 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. Please accept our apology for the delay in responding. 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. Where energized parts are exposed, the minimum clear workspace shall not be less than 6 feet 6 inches (1.98 m) high (measured vertically from the floor or platform), or less than 3 feet (914 mm) wide (measured parallel to the equipment). 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. At least one entrance of sufficient area shall be provided to give access to the working space about electric equipment. Materials such as solder, fluxes, inhibitors, and compounds, where employed, shall be suitable for the use and shall be of a type that will not adversely affect the conductors, installation, or equipment. Interrupting rating. Clearance To ensure that an electrical panel can be accessed at all times - during inspection, maintenance or emergency - OSHA has determined that the working space in front of the equipment must be at least 30-inches wide (or the width of the equipment). Voltage testing should follow lock out/tag out. Marking. 0.9 Meter (3 Ft) Clearance When Facing Other Electrical Panels <480V. 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). 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. Working space required by this subpart shall not be used for storage. Splices. Horizontal clearance between the conductor and Building. Engineers, electricians, and other professionals work with electricity directly, including working on overhead lines, cable harnesses, and circuit assemblies. Where doors are used giving access to voltages from 500 to 1000 volts ac or dc, either door locks shall be provided or interlocks shall be installed. To keep apprised of such developments, you can consult OSHA's website at https://www.osha.gov. 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. 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. 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. One of the most common questions people have when setting standards in a facility for electrical panel clearance requirements is what OSHA says. It shall be designed so no pole can be operated independently and shall be capable of being locked in the open position. 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. Electrical Safety Orders. 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). 600 Volts, nominal, or less. Induction heating coils shall be protected by insulation or refractory materials or both. Type. Boxes shall be designed so that no live parts are exposed to accidental contact. The disconnecting means shall be within sight of the equipment served. Having an electrical panel clearance policy in place is very important not only for practical reasons, but also in order to comply with various regulations. Disconnecting means. Footnote(2) NOTE: For SI units: one foot=0.3048 m. Elevation of unguarded live parts. The 480 volt load circuits are deenergized, but the 110 volt control circuits must remain energized for the following reasons: Control panels. 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. Terminals for more than one conductor and terminals used to connect aluminum shall be so identified. 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. No underwater lighting fixtures may be installed for operation at over 150 volts between conductors. 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. Clearance. The following requirements apply to industrial and commercial laboratory equipment. 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. If fixed electric equipment is mounted on an energized conductive surface, it shall be bonded to that surface. President, Safety Specialties Incorporated other equipment foreign to the electrical installation shall be located in . Disconnecting means for runway conductors. We appreciate your interest in occupational safety and health. 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. Protection shall be provided where necessary to avoid damage from condensation leaks and breaks in such foreign systems. Following the 110.26 NEC standards is fairly easy. However, working space is not required in back of equipment such as deadfront switchboards or control assemblies 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. You're not if you fail to comply with the following three clearance requirements in Sec. 1The minimum elevation may be 2.6 m (8.5 ft) for installations built before August 13, 2007. Equipment intended to interrupt current at other than fault levels shall have an interrupting rating at nominal circuit voltage sufficient for the current that must be interrupted. All other receptacles on the property shall be located at least 3.05 m (10 ft) from the inside walls of a pool. 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. 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. This receptacle shall be located not more than 1.98 m (6.5 ft) above the floor, platform, or grade level serving the pool. A switch or circuit breaker shall be provided by which each resistance welder and its control equipment can be disconnected from the supply circuit. Identification of disconnecting means and circuits. 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. The fact is, however, that it goes well beyond that. Miles, Jr., Director 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. Filter by. 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 . 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. The disconnecting means shall disconnect the sign or outline lighting system and the controller from all ungrounded supply conductors. 2932 Hazel Ave. For equipment connected to a 120-volt branch circuit of 30 amperes or less, a grounding-type attachment plug cap and receptacle of proper rating may serve as a disconnecting means. While OSHA is only followed in the United States, NFPA is a non-governmental organization. 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 . Disconnecting means. These markings shall be of sufficient durability to withstand the environment involved. Resistance welders. Metal-enclosed switchgear, unit substations, transformers, pull boxes, connection boxes, and other similar associated equipment shall be marked with appropriate caution signs. This is for ANY electrical panel including the corner of the condenser where the wiring enters. Portable distribution and termination boxes. OSHA requirements are set by statute, standards, and regulations. We hope you find this information helpful. (10 cm) for every 10 kV over that voltage. 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.) 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. 2023 Electrical Safety Expert | All Rights Reserved, NEC + OSHA Electrical Panel Clearance Requirements, Understanding NEC Panel Clearance Requirements, OSHA Electrical Panel Clearance Requirements. 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? Examination, installation, and use of equipment -. 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. Exposed conductive surfaces, such as electric equipment housings, cabinets, boxes, motors, raceways and the like that are within the cell line working zone. 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. All of these options will use effective visual communication standards to make sure that nothing is placed in the area directly around your electrical panels. Not posting required clearances in electrical panel areas, generally falls under this type of violation. 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. Pan Defiance, Ohio 43512 This letter constitutes OSHA's interpretation of the requirements discussed. 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