The disconnecting means shall be an enclosed externally operable fused motor circuit switch or circuit breaker capable of being locked in the open position. The manually operated switch shall be installed adjacent to this equipment. Electrolytic cells. Hoses shall be of a nonconductive material. 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. This is for ANY electrical panel including the corner of the condenser where the wiring enters. 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. For failure to abate violations, the penalty amount is $14,502 per day beyond the abatement date. This means you cannot place machinery or other equipment in the space around an electrical panel without making sure that it meets the NEC working clearance requirements. other equipment foreign to the electrical installation shall be located in . The following requirements apply to elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts. 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. 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. The disconnecting means shall open all ungrounded conductors simultaneously and shall be: Disconnecting means for cranes and monorail hoists. 7. See if you can "orient" the disconnect so as to have requisite clearance in front. The area must not only remain completely clear of items at all times, but it also needs to be accessible. Cables and mats shall be arranged so as not to present a tripping hazard. Where controls are enclosed in cabinets, the doors shall either open at least 90 degrees or be removable. 2. Installations covered by paragraph (h) of this section shall comply with all applicable provisions of this subpart, except as follows: Disconnecting means. A single receptacle of the locking and grounding type that provides power for a permanently installed swimming pool recirculating pump motor may be located not less than 1.52 m (5 ft) from the inside walls of a pool. Entrance and access to workspace. Wiring for an amusement ride, attraction, tent, or similar structure may not be supported by another ride or structure unless specifically identified for the purpose. Grouping. The clearance around the electric panel must be at least 30 inches wide with 3 of front workspace clearance. 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. Insulation integrity. A new section, 450.14, requires a disconnecting means for most transformers. Examination, installation, and use of equipment -. If equipment is exposed to physical damage from vehicular traffic, guards shall be provided to prevent such damage. The marking required by paragraph (f)(5)(i) of this section shall be readily visible and shall state Caution - Series Combination System Rated __ Amperes. What About NFPA 70e Electrical Panel Clearance? No marks or blemishes on wheel faces. The converting apparatus (including the dc line) and high-frequency electric circuits (excluding the output circuits and remote-control circuits) shall be completely contained within enclosures of noncombustible material. 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 specific electrical panel clearance requirements will depend on what area you are looking at, and how much voltage there is going through the panel. The points of control shall be so located that persons are not likely to come in contact with any live part or moving part of the equipment while turning on the lights. A variety of possible solutions may be implemented to reduce or eliminate the risk of injury associated with electrical work. 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. Others, such as office workers and sales people, work with electricity indirectly and may also be exposed to electrical hazards. 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. If the voltage is higher than 50kV, the clearance shall be increased 4 in. For example, a switchboard is located next to a disconnect (safety) switch. 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. The disconnecting means shall be located where it is readily accessible to qualified persons. 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. 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. 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. Your scenario and questions, and our replies, follow. A box or fitting shall be installed at each connection point, outlet, switch point, or junction point. 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). The supply circuit switch may be used as the welder disconnecting means where the circuit supplies only one welder. 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. We appreciate your interest in occupational safety and health. 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. Mechanical execution of work. Switches operated by foot pressure shall be provided with a shield over the contact button to avoid accidental closing of the switch. Directorate of Enforcement Programs AC systems supplying fixed and portable electric equipment within the cell line working zone; and. beyond the front of the electric equipment. The markings required by paragraphs (f)(1) and (f)(2) of this section shall be of sufficient durability to withstand the environment involved. They are respected around the world and many countries follow their recommendations when creating their own rules and regulations. 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]. Each sign and outline lighting system, or feeder circuit or branch circuit supplying a sign or outline lighting system, shall be controlled by an externally operable switch or circuit breaker that will open all ungrounded conductors. Electrical installations in a vault, room, closet or in an area surrounded by a wall, screen, or fence, access to which is controlled by lock and key or other equivalent means, are considered to be accessible to qualified persons only. Splices. Even if they know how much room in inches is required, they may not be able to properly estimate how much room they are leaving when placing items in the area. 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? 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. 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. Durability. The minimum working space height required for this disconnect switch is 6 1 / 2 feet (see Figure 1). 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. 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. When employees are trained to work safely, through the requirements, they should be able to anticipate and avoid injury from job related hazards. 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. Keep the fire inside the fireplace. One of the most common questions people have when setting standards in a facility for electrical panel clearance requirements is what OSHA says. This letter constitutes OSHA's interpretation of the requirements discussed. In fact some employers go so far as to mark off a line on the floor or paint an area. 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. 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.) Closely following the new requirements in the 2002 NEC for motor disconnect locations will help make safety a reality. Visit the Electric Power Generation, Transmission and Distribution Standard Page Connectors and cable connections may not be placed in audience traffic paths or within areas accessible to the public unless guarded. 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 . A disconnecting means shall be provided for each motor and controller. Unguarded live parts above working space shall be maintained at elevations not less than specified in Table S-3. 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. Electricity has long been recognized as a serious workplace hazard. Examination, installation, and use of equipment -. The relevant section of the national electric code here is NEC 110.26. 3. All fluidizing lines-would have to be purged in order to prevent plugging of the line. Occupational Safety and Health Administration, Outreach Training Program (10- and 30-hour Cards), OSHA Training Institute Education Centers, Severe Storm and Flood Recovery Assistance. In locations where electric equipment would be exposed to physical damage, enclosures or guards shall be so arranged and of such strength as to prevent such damage. Filter by. Lighting outlets and points of control. Durability of markings. 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. Specific purpose equipment and installations. These markings can include floor marking tape, floor signs, and labels. Approval. 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. 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. Classification by type, size, voltage, current capacity, specific use. The conductive surfaces of cranes and hoists that enter the cell line working zone need not be grounded. 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. 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. 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 . , a switchboard is located osha electrical disconnect clearance requirements to a disconnect ( safety ).... Programs AC systems supplying fixed and portable electric equipment within the cell line working zone need not grounded! Space shall be an enclosed externally operable fused motor circuit switch may be used the. 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osha electrical disconnect clearance requirements