How to determine requirementspart 2: To be on the safe side, the working space and space around electrical equipment should always be clear per 110.26 (A), if possible. Protection shall be provided where necessary to avoid damage from condensation leaks and breaks in such foreign systems. Examination. The supply circuit disconnecting means is permitted as a heating equipment disconnecting means where the circuit supplies only one piece of equipment. These markings shall be of sufficient durability to withstand the environment involved. Standard Number: 1910.179 OSHA requirements are set by statute, standards and regulations. The NFPA is focused largely on reducing the risk of fires from occurring so that everyone can remain safe. Induction and dielectric heating equipment. With these tools, floor marking for electrical panel compliance can be accomplished without spending too much on time or effort. [46 FR 4056, Jan. 16, 1981, as amended at 73 FR 64205, Oct. 29, 2008], Occupational Safety & Health Administration. Occupational Safety and Health Administration, Outreach Training Program (10- and 30-hour Cards), OSHA Training Institute Education Centers, Severe Storm and Flood Recovery Assistance. Access and entrance to working space. At least one entrance of sufficient area shall be provided to give access to the working space about electric equipment. This means once you understand the NEC panel clearance requirements, you will also know those that OSHA puts forth. 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. 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. John B. All electrical conductors and equipment shall be approved. Unused openings in boxes, raceways, auxiliary gutters, cabinets, equipment cases, or housings shall be effectively closed to afford protection substantially equivalent to the wall of the equipment. In previous NEC editions, transformers didn't require a disconnecting means. July 26, 2004 A box or fitting shall be installed at each connection point, outlet, switch point, or junction point. 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. Conductors shall be racked to provide ready and safe access in underground and subsurface enclosures that persons enter for installation and maintenance. Receptacles on circuits supplied by an isolating transformer with an ungrounded secondary: May not be used in any other location in the facility. Walls constructed of concrete, brick, or tile are considered to be grounded surfaces. On escalators and moving walks, the disconnecting means shall be installed in the space where the controller is located. Wooden plugs driven into holes in masonry, concrete, plaster, or similar materials shall not be used. The disconnecting means shall open all ungrounded conductors simultaneously and shall be: Disconnecting means for cranes and monorail hoists. 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. A ground-fault circuit interrupter shall be installed in the branch circuit supplying underwater fixtures operating at more than 15 volts. However, No. Flexible cords and cables run on the ground, where accessible to the public, shall be covered with approved nonconductive mats. 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. Entrance and access to workspace. The following requirements apply to outdoor enclosed equipment accessible to unqualified employees: Ventilating or similar openings in equipment shall be so designed that foreign objects inserted through these openings will be deflected from energized parts; Where exposed to physical damage from vehicular traffic, suitable guards shall be provided; Nonmetallic or metal-enclosed equipment located outdoors and accessible to the general public shall be designed so that exposed nuts or bolts cannot be readily removed, permitting access to live parts; Where nonmetallic or metal-enclosed equipment is accessible to the general public and the bottom of the enclosure is less than 2.44 m (8.0 ft) above the floor or grade level, the enclosure door or hinged cover shall be kept locked; and. Mechanical execution of work. Conductors and equipment used on circuits exceeding 600 volts, nominal, shall comply with all applicable provisions of paragraphs (a) through (g) of this section and with the following provisions which supplement or modify those requirements. Splices. Deteriorating agents. Electrical is addressed in specific OSHA standards for general industry and maritime. The frames and enclosures of portable electric equipment used within the cell line working zone may not be grounded, unless the cell line circuit voltage does not exceed 200 volts DC or the frames are guarded. (10 cm) for every 10 kV over that voltage. Examination, installation, and use of equipment -. 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. Where bare energized parts at any voltage or insulated energized parts above 600 volts are located adjacent to such entrance, they shall be guarded. Insulation integrity. This paragraph applies to induction and dielectric heating equipment and accessories for industrial and scientific applications, but not for medical or dental applications or for appliances. 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. The marking required by paragraph (f)(5)(i) of this section shall be readily visible and shall state Caution - Series Combination System Rated __ Amperes. Miles, Jr., Director The ampere rating of this disconnecting means may not be less than the supply conductor ampacity. 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. Front working space. If more than one piece of equipment is operated from the same high-voltage circuit, each piece or each group of equipment as a unit shall be provided with a high-voltage switch or equivalent disconnecting means. 508 Carpenter Road 1910.306 - Specific purpose equipment and installations. Identified Replacement Component Required.. This is necessary because it is not practical to run dozens, or even hundreds, of different electrical lines directly into the main circuit. Electrical installations in a vault, room, or closet or in an area surrounded by a wall, screen, or fence, access to which is controlled by lock and key or other approved means, are considered to be accessible to qualified persons only. At least one entrance shall be provided to give access to the working space about electric equipment. All electric equipment, including power supply cords, operating at more than 15 volts and used with fountains shall be protected by ground-fault circuit interrupters. Following the 110.26 NEC standards is fairly easy. Cord- and plug-connected lighting fixtures installed within 4.88 m (16 ft) of the water surface of permanently installed pools; and. 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. Mounting. The working width around the panel must be at least 30 inches. Note that our enforcement guidance may be affected by changes to OSHA rules. Circuits supplying power to ungrounded receptacles for hand-held, cord- and plug-connected equipment shall meet the following requirements: The circuits shall be electrically isolated from any distribution system supplying areas other than the cell line working zone and shall be ungrounded; The circuits shall be supplied through isolating transformers with primaries operating at not more than 600 volts between conductors and protected with proper overcurrent protection; The secondary voltage of the isolating transformers may not exceed 300 volts between conductors; and. 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. Another nice thing about having these standardized requirements is that they apply across national boarders. Cord- and plug-connected equipment. Sources that provide helpful information about electrical in the workplace. Wire connectors or splicing means installed on conductors for direct burial shall be listed for such use. Many workers are unaware of the potential electrical hazards present in their work environment, which makes them more vulnerable to the danger of electrocution. When it is necessary to perform work on energized equipment, OSHA 1910.333 (a) (2) requires safety-related work practices to be used and NFPA 70E Article 110.8 (B) (1) requires an Electrical Hazard Analysis before work is performed on live equipment operating at 50 volts and higher. Open conductors are prohibited except as part of a listed assembly or festoon lighting installed in accordance with 1910.304(c). Maximum Number of Disconnects (i.e. Although there were no documented injuries to warrant this change, it's obvious that this requirement should enhance safety. Electric equipment shall be installed in a neat and workmanlike manner. Ladder clearance 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. Low-Voltage Electrical Safety Orders (Sections 2299 - 2599) Group 2. Entrances to rooms and other guarded locations containing exposed live parts shall be marked with conspicuous warning signs forbidding unqualified persons to enter. 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. 7. Conductors shall be spliced or joined with splicing devices designed for the use or by brazing, welding, or soldering with a fusible metal or alloy. This is in response to your April 30, 1995 letter requesting interpretation of the electrical standard, 29 CFR Subpart S. Your letter, which was addressed to Mr. Joseph Pipkin, who is Director of the Office of Electrical, Electronics and Mechanical Engineering Safety Standards in the Directorate of Safety Standards Programs of the Occupational Safety and Health Administration (OSHA) was forwarded to the Directorate of Compliance Programs for response. Radiographic and fluoroscopic-type equipment shall be effectively enclosed or shall have interlocks that deenergize the equipment automatically to prevent ready access to live current-carrying parts. Metal-enclosed switchgear, unit substations, transformers, pull boxes, connection boxes, and other similar associated equipment shall be marked with appropriate caution signs. By location on a balcony, gallery, or platform so elevated and arranged as to exclude unqualified persons. OSHA requirements are set by statute, standards, and regulations. Other cord- and plug-connected, fixed or stationary equipment used with permanently installed pools. 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. Installation and use. The following requirements apply to indoor installations that are accessible to other than qualified persons: The installations shall be made with metal-enclosed equipment or shall be enclosed in a vault or in an area to which access is controlled by a lock; Metal-enclosed switchgear, unit substations, transformers, pull boxes, connection boxes, and other similar associated equipment shall be marked with appropriate caution signs; and. Fortunately, the OSHA electrical panel clearance requirements are taken directly from the NEC. Safety electrical work practices; motor disconnects;work clearances. 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. In electric equipment rooms, the illumination may not be controlled by automatic means only. The Electrical Safety Authority ( ESA) was established in 1999 . Sincerely, Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. 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. By elevation of 2.44 m (8.0 ft) or more above the floor or other working surface. On elevators without generator field control, the disconnecting means shall be located within sight of the motor controller. 0.9 Meter (3 Ft) Clearance When Facing Other Electrical Panels <480V. The work space shall be clear and extend from the grade, floor, or platform to the height required by paragraph (g)(1)(vi) of this section. Application for variances under Paragraph 1910.11 must include a statement showing how the conditions, practices, means, methods, operations, or processes used or proposed to be used would provide employment and places of employment to employees which are as safe and healthful as those required under the standard from which a variance is sought. 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. 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