Completed wiring installations shall be free from short circuits and from grounds other than those required or permitted by this subpart. 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. Approval. A worker has to be qualified, trained and can demonstrate skills, while exposed to electrical hazards. 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. The Ontario Electrical Safety Code ( OESC) deals in detail with permanent and temporary theatrical electrical installations. 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. Insulation integrity. 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. The disconnecting means shall be readily accessible to the operator, including when the ride is in operation. 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. Power supply circuits and receptacles for portable electric equipment. The lighting outlets shall be arranged so that persons changing lamps or making repairs on the lighting system will not be endangered by live parts or other equipment. Concrete, brick, and tile walls are considered as grounded surfaces. Maximum Number of Disconnects (i.e. 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. Enclosure for electrical installations. Readily accessible and operable from the ground or floor level; Arranged to be locked in the open position; and. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. Metal-enclosed switchgear, unit substations, transformers, pull boxes, connection boxes, and other similar associated equipment shall be marked with appropriate caution signs. 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. Please accept our apology for the delay in responding. 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. Application. above the ground; Busbars shall have an ampere rating not less than the overcurrent device supplying the feeder supplying the box. Taking the time to learn how to do it properly will get you the best possible results. The following requirements apply to elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts. 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. The ampere rating of this disconnecting means may not be less than the supply conductor ampacity. Workspace about equipment. Wooden plugs driven into holes in masonry, concrete, plaster, or similar materials shall not be used. 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. 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.) Lighting fixtures, lighting outlets, and ceiling suspended (paddle) fans. No architectural appurtenance or other equipment may be located in the working space required by paragraph (g)(1)(i) of this section. beyond the front of the electric equipment. For the NEC 2020, there's an added article titled 230.85 Emergency Disconnects. Sincerely, 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). Panels with 151 to 600 volts should have 42 of clearance around it. 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. Sources that provide helpful information about electrical in the workplace. 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. High-Voltage Electrical Safety Orders (Sections 2700 - 2989) If the disconnecting means is an integral part of the motor controller, it shall be operable without opening the enclosure. 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. 0.9 Meter (3 Ft) The width of the workingspace in front of the Panel. Carnivals, circuses, fairs, and similar events. Hoppers and transitions could plug up with product. Another safety focused agency is the National Fire Protection Association, or NFPA. John B. Miles, Jr., Director For equipment designed for floor mounting, clearance between top surfaces and adjacent surfaces shall be provided to dissipate rising warm air. 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. Dear Mr. Schuldt: In addition, from time to time we update our guidance in response to new information. Distances shall be measured from the live parts, if they are exposed, or from the enclosure front or opening, if they are enclosed. 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. Mechanical strength and durability, including, for parts designed to enclose and protect other equipment, the adequacy of the protection thus provided. Where bare energized parts at any voltage or insulated energized parts above 600 volts, nominal, to ground are located adjacent to such entrance, they shall be suitably guarded. This is for ANY electrical panel including the corner of the condenser where the wiring enters. Working space about electric equipment. 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. The conductors and equipment required or permitted by this subpart shall be acceptable only if approved, as defined in 1910.399. 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. AOP Forum Rules: Rules For Equipment Owners. 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. Includes references that provide information related to electrical in construction including OSHA's electrical construction regulations, hazard recogition, possible solutions and additional resources. 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. Lighting fixtures and lighting outlets installed in the area extending between 1.52 m (5 ft) and 3.05 m (10 ft) horizontally from the inside walls of a pool shall be protected by a ground-fault circuit interrupter unless installed 1.52 m (5 ft) above the maximum water level and rigidly attached to the structure adjacent to or enclosing the pool. 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. No fixed work platform has been provided for servicing the unit. 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. This receptacle shall be located not more than 1.98 m (6.5 ft) above the floor, platform, or grade level serving the pool. 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. This letter constitutes OSHA's interpretation of the requirements discussed. There shall also be a similar means to disconnect the power to all dedicated heating, ventilating, and air-conditioning (HVAC) systems serving the room and to cause all required fire/smoke dampers to close. 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. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. Flexible cords and cables run on the ground, where accessible to the public, shall be covered with approved nonconductive mats. Also, from time to time we update our guidance in response to new information. They bring all the electrical lines into one centralized location so that the main power source can feed them. The control for these disconnecting means shall be grouped and identified and shall be readily accessible at the principal exit doors. Cord- and plug-connected equipment. Except for underground box covers that weigh over 45.4 kg (100 lb), doors and covers of enclosures used solely as pull boxes, splice boxes, or junction boxes shall be locked, bolted, or screwed on. Here's a broad breakdown of space requirements when planning around electrical panels: 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. A variety of possible solutions may be implemented to reduce or eliminate the risk of injury associated with electrical work. Placed within view of the runway contact conductors. Sufficient space shall be provided and maintained about electric equipment to permit ready and safe operation and maintenance of such equipment. Group 1. 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. Cord connectors may not be laid on the ground unless listed for wet locations. horizontally shall be provided. All other receptacles on the property shall be located at least 3.05 m (10 ft) from the inside walls of a pool. Defiance, Ohio 43512 Note that our enforcement guidance may be affected by changes to OSHA rules. 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. Equipment intended to break current shall have an interrupting rating at system voltage sufficient for the current that must be interrupted. Access and entrance to working space. Even in countries that do not have strict regulations when it comes to electrical panel clearance will often voluntarily choose to follow the recommendations found in NFPA 70e. Mr. John C. (Jack) Schuldt, Sr. When the system is put back into production there is a chance of many more hazards developing that would have to be addressed. 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