X-Ray equipment. 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. There should be at least three to three-and-a-half feet of clearance in front of all electrical disconnects and breaker panels. 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. 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. This is necessary for all types of work including examination of the electrical panel, making adjustments to the electrical panel, servicing the electrical panel, and of course, performing maintenance on the electrical panel. Electric equipment and wiring methods in or on rides, concessions, or other units shall be provided with mechanical protection where such equipment or wiring methods are subject to physical damage. Includes references that provide information related to electrical in construction including OSHA's electrical construction regulations, hazard recogition, possible solutions and additional resources. 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. Suitability of equipment for an identified purpose may be evidenced by listing, labeling, or certification for that identified purpose. Approval. Enclosure for electrical installations. 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. If anything is found in a spot that is too close to the panel, the items can be moved right away. Additional lighting fixtures are not required where the working space is illuminated by an adjacent light source. The disconnecting means shall be within sight of the equipment served. 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. In all cases, the working space shall permit at least a 90-degree opening of equipment doors or hinged panels; and. February 7, 1996 One last option is to put down the initial square of floor marking, but then use a floor sign that specifically says not to place anything in that area. Working space for equipment likely to require examination, adjustment, servicing, or maintenance while energized shall comply with the following dimensions, except as required or permitted elsewhere in this subpart: The depth of the working space in the direction of access to live parts may not be less than indicated in Table S-1. U0xxx - Generic. What Constitutes Clearance Around Electrical Panels? Ungrounded portable electric equipment shall be distinctively marked and shall employ plugs and receptacles of a configuration that prevents connection of this equipment to grounding receptacles and that prevents inadvertent interchange of ungrounded and grounded portable electric equipment. Also, from time to time we update our guidance in response to new information. What is the residential electrical panel clearance requirements? In previous NEC editions, transformers didn't require a disconnecting means. The fact is, however, that it goes well beyond that. Specific purpose equipment and installations. Metal frames and metal parts of rides, concessions, trailers, trucks, or other equipment that contain or support electrical equipment. If you have any further questions, please feel free to contact the Office of General Industry Enforcement at (202) 693-1850. 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. At least one entrance shall be provided to give access to the working space about electric equipment. Except as required or permitted elsewhere in this subpart, live parts of electric equipment operating at 50 volts or more shall be guarded against accidental contact by cabinets or other forms of enclosures, or by any of the following means: By location in a room, vault, or similar enclosure that is accessible only to qualified persons. Control. Lighting outlets and points of control. 110-26 of the National Electrical Code (NEC): 1) at least a 3-ft clearance in front of all electrical equipment; 2) a 30 in.-wide working space in front of equipment operating at 600V or less; and 3) minimum headroom clearance of 6 ft or the height of the . Unfortunately, it is often difficult for people to remember exactly how much distance from a panel things can be. Voltage testing should follow lock out/tag out. Ventilating or similar openings in metal-enclosed equipment shall be designed so that foreign objects inserted through these openings will be deflected from energized parts. Mechanical strength and durability, including, for parts designed to enclose and protect other equipment, the adequacy of the protection thus provided; Heating effects under all conditions of use; Classification by type, size, voltage, current capacity, and specific use; and. The disconnecting means shall be within sight of the sign or outline lighting system that it controls. Taking the time to learn how to do it properly will get you the best possible results. This paragraph applies to the installation of electric equipment and wiring used in connection with cranes, monorail hoists, hoists, and all runways. OSHA requirements are set by statute, standards, and regulations. Where controls are enclosed in cabinets, the doors shall either open at least 90 degrees or be removable. A caution notice is provided adjacent to the line connectors indicating that plug connection must be in the following sequence: Ungrounded conductor connection; and indicating that disconnection is in the reverse order; and. All fluidizing lines-would have to be purged in order to prevent plugging of the line. The ampere rating of this disconnecting means may not be less than the supply conductor ampacity. 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. Engineers, electricians, and other professionals work with electricity directly, including working on overhead lines, cable harnesses, and circuit assemblies. Listed or labeled equipment shall be installed and used in accordance with any instructions included in the listing or labeling. The overcurrent protection may not exceed the ampere rating of the receptacle, except as permitted in 1910.305(j)(4) for motor loads; Where single-pole connectors are used, they shall comply with the following: Where ac single-pole portable cable connectors are used, they shall be listed and of the locking type. All Rights Re horizontally shall be provided. Standard Number: 1910.179 OSHA requirements are set by statute, standards and regulations. 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. Working space is not required in back of assemblies such as dead-front switchboards or motor control centers 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. The NFPA is focused largely on reducing the risk of fires from occurring so that everyone can remain safe. Insulation integrity. Miles, Jr., Director Your safety manager or other designated individual should have a list of where all the electrical panels in the facility are located. 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. Condition C - Exposed live parts on both sides of the work space (not guarded as provided in Condition A) with the operator between. 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. 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. Wire connectors or splicing means installed on conductors for direct burial shall be listed for such use. Cord connectors may not be laid on the ground unless listed for wet locations. 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. Overcurrent protection of electrolytic cell dc process power circuits need not comply with the requirements of 1910.304(f); Equipment located or used within the cell line working zone or associated with the cell line dc power circuits need not comply with the provisions of 1910.304(g); and. If deenergizing the control circuit(s) is infeasible, paragraph 1910.333(c)(2) would apply to work on or near the 110 volt control circuit(s). Fixed electric equipment may be bonded to the energized conductive surfaces of the cell line, its attachments, or auxiliaries. 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. 5 Steps Before Working Lines or Equipment as De-Energized. Where a pool is installed permanently at a dwelling unit, at least one 125-volt, 15- or 20-ampere receptacle on a general-purpose branch circuit shall be located a minimum of 3.05 m (10 ft) and not more than 6.08 m (20 ft) from the inside wall of the pool. Cables and mats shall be arranged so as not to present a tripping hazard. A readily accessible disconnecting means shall be provided by which each heating equipment can be isolated from its supply circuit. One of the most common questions people have when setting standards in a facility for electrical panel clearance requirements is what OSHA says. The entrances to all buildings, rooms or enclosures containing exposed live parts or exposed conductors operating at over 600 volts, nominal, shall be kept locked or shall be under the observation of a qualified person at all times. Other cord- and plug-connected, fixed or stationary equipment used with permanently installed pools. 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. 2. Doors or detachable panels shall be employed for internal access. Horizontal clearance between the conductor and Building. The use of single-pole separable connectors shall comply with at least one of the following conditions: Connection and disconnection of connectors are only possible where the supply connectors are interlocked to the source and it is not possible to connect or disconnect connectors when the supply is energized; or. 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. Eight (8) to ten (10) hours of start-up time could be required to re-load processing bins, fluidizing lines and processing transitions. 1The minimum elevation may be 2.6 m (8.5 ft) for installations built before August 13, 2007. Headroom. Receptacles that are located within 4.57 m (15 ft), or 6.08 m (20 ft) if the installation was built after August 13, 2007, of the inside walls of the pool shall be protected by ground-fault circuit interrupters. Splices. Clear spaces. Grounding should be the last of these steps. These are generic codes which may not apply to all vehicles and we recommend you . Programmable Logic Controllers shut off in some instances and there is no power back-up. Sincerely, Clearance is required in the direction of access for operation, that is in the front. Protection shall be provided where necessary to avoid damage from condensation leaks and breaks in such foreign systems. 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. 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. Except as provided in paragraph (b)(2)(iv) of this section, a motor-circuit switch, molded case switch, or circuit breaker shall be provided in the leads from the runway contact conductors or other power supply on all cranes and monorail hoists. 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. Per the NEC, 30" wide by 36" front to back by 6.5' vertical clearance. Electrically driven or controlled irrigation machines -. Induction and dielectric heating equipment. The type of enclosure used in a given case shall be designed and constructed according to the hazards associated with the installation. 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. The portion of an overhead crane or hoist that contacts an energized electrolytic cell or energized attachments shall be insulated from ground. Where there is more than one driving machine in a machine room, the disconnecting means shall be numbered to correspond to the identifying number of the driving machine that they control. Location. OSHA requirements are set by statute, standards and regulations. It designs clearance requirements that make sure employees have enough space around workplace equipment and in work and walking spaces. 600 Volts, nominal, or less. Minimum clear distances may be 0.7 m (2.5 ft) for installations built before April 16, 1981. Mr. William Overby Requesting clearance should be the first step. You're not if you fail to comply with the following three clearance requirements in Sec. This receptacle shall be located not more than 1.98 m (6.5 ft) above the floor, platform, or grade level serving the pool. 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. Enclosure, 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. The relevant section of the national electric code here is NEC 110.26. 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. Your question has been restated below for clarity. A new section, 450.14, requires a disconnecting means for most transformers. Arcing parts. By partitions or screens so arranged that only qualified persons will have access to the space within reach of the live parts. The points of control shall be located so that persons are prevented from contacting any live part or moving part of the equipment while turning on the lights. 2. This paragraph applies to electric wiring for and equipment in or adjacent to all swimming, wading, therapeutic, and decorative pools and fountains; hydro-massage bathtubs, whether permanently installed or storable; and metallic auxiliary equipment, such as pumps, filters, and similar equipment. The lighting outlets shall be so arranged that persons changing lamps or making repairs on the lighting system will not be endangered by live parts or other equipment. The top of the disconnect switch is only 72 inches (6 feet) above the floor. The marking shall be of sufficient durability to withstand the environment involved. Mr. John C. (Jack) Schuldt, Sr. The 480 volt load circuits are deenergized, but the 110 volt control circuits must remain energized for the following reasons: 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. The panel, the doors shall either open at least three to three-and-a-half of! In all cases, the working space shall permit at least three three-and-a-half. The marking shall be arranged so as not to present a tripping hazard space around workplace equipment in... 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