All other receptacles on the property shall be located at least 3.05 m (10 ft) from the inside walls of a pool. The NFPA is focused largely on reducing the risk of fires from occurring so that everyone can remain safe. Once again, however, the NFPA 70e electrical panel clearance requirements will match those of the NEC and of OSHA. Where controls are enclosed in cabinets, the doors shall either open at least 90 degrees or be removable. Sincerely, Working space required by this standard may not be used for storage. Suitable enclosures or guards must be provided to prevent damage to this equipment. Also, from time to time we update our guidance in response to new information. A worker has to be qualified, trained and can demonstrate skills, while exposed to electrical hazards. A simple way to meet electrical panel clearance requirements is to use floor markings. The supply circuit disconnecting means is permitted as a heating equipment disconnecting means where the circuit supplies only one piece of equipment. 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. Amusement rides and amusement attractions shall be maintained not less than 4.57 m (15 ft) in any direction from overhead conductors operating at 600 volts or less, except for the conductors supplying the amusement ride or attraction. 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. Interrupting rating. Insulated wire or insulated busbars operating at not over 300 volts are not considered live parts. If the disconnect for a piece of HVAC equipment doesn't have any fuses, then can you make the argument the switch will not require maintenance so that 3' clearance isn't required? 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. The fact is, however, that it goes well beyond that. 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. 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 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. Not posting required clearances in electrical panel areas, generally falls under this type of violation. For equipment designed for floor mounting, clearance between top surfaces and adjacent surfaces shall be provided to dissipate rising warm air. However, switches or other equipment operating at 600 volts, nominal, or less, and serving only equipment within the high-voltage vault, room, or enclosure may be installed in the high-voltage enclosure, room, or vault if accessible to qualified persons only. 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. 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. The type of enclosure used in a given case shall be designed and constructed according to the hazards associated with the installation. Following the 110.26 NEC standards is fairly easy. Miles, Jr., Director This is necessary because it is not practical to run dozens, or even hundreds, of different electrical lines directly into the main circuit. 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). Flexible cords and cables shall be listed for extra-hard usage. Remote crane or hoist controls that may introduce hazardous electrical conditions into the cell line working zone shall employ one or more of the following systems: Pendant pushbutton with nonconductive supporting means and with nonconductive surfaces or ungrounded exposed conductive surfaces; or. Condition B - Exposed live parts on one side and grounded parts on the other side. 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. 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. Interrupting rating. Insulated wire or insulated busbars operating at not over 300 volts are not considered live parts. High-Voltage Electrical Safety Orders (Sections 2700 - 2989) Pan Sources that provide helpful information about electrical in the workplace. Standard Number: 1910.179 OSHA requirements are set by statute, standards and regulations. The 480 volt load circuits are deenergized, but the 110 volt control circuits must remain energized for the following reasons: Electric equipment shall be installed in a neat and workmanlike manner. They bring all the electrical lines into one centralized location so that the main power source can feed them. Conditions A, B, and C are as follows: Condition A - 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 suitable wood or other insulating material. However, other equipment associated with the electrical installation and located above or below the electric equipment may extend not more than 153 mm (6 in.) Installations accessible to qualified persons only. other equipment foreign to the electrical installation shall be located in . Electrical Safety. 10 or smaller conductors may be connected by means of wire binding screws or studs and nuts having upturned lugs or equivalent. Installations covered by paragraph (h) of this section shall comply with all applicable provisions of this subpart, except as follows: Disconnecting means. Where rear access is required to work on de-energized parts on the back of enclosed equipment, a minimum working space of 30 inches (762 mm) horizontally shall be provided. 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. Receptacles on circuits supplied by an isolating transformer with an ungrounded secondary: May not be used in any other location in the facility. Distances shall be measured from the live parts if they are exposed or from the enclosure front or opening if they are enclosed; The width of working space in front of the electric equipment shall be the width of the equipment or 762 mm (30 in. Where the driving machine is located in a remote machinery space, a single disconnecting means for disconnecting all ungrounded main power supply conductors shall be provided and be capable of being locked in the open position. Terms You Should Know: Working space: The front clearance, side clearance, and height clearance requirements for electrical equipment that provide a safe area for maintenance, inspections, and other work. When used outdoors, flexible cords and cables shall also be listed for wet locations and shall be sunlight resistant. 1910.306 - Specific purpose equipment and installations. Illumination shall be provided for all working spaces about service equipment, switchboards, panelboards, and motor control centers installed indoors. 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. 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. Fixed electric equipment may be bonded to the energized conductive surfaces of the cell line, its attachments, or auxiliaries. The tape can be placed down in the proper spots to make sure you get immediate results. Auxiliary electric equipment, such as motors, transducers, sensors, control devices, and alarms, mounted on an electrolytic cell or other energized surface shall be connected to the premises wiring systems by any of the following means: Multiconductor hard usage or extra hard usage flexible cord; Wire or cable in suitable nonmetallic raceways or cable trays; or. Classification by type, size, voltage, current capacity, specific use. If there is anything that would prevent this or make it more dangerous, the chances are that you are in violation of the regulations and could get cited for it during an inspection. Motor controllers. 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. Disconnecting means for runway conductors. . The disconnecting means shall be a switch or circuit breaker, and its rating may not be less than that necessary to accommodate overcurrent protection. The workspace shall be adequate to permit at least a 90-degree opening of doors or hinged panels. It is just as important to create your own set of policies and procedures to ensure that you are always in compliance with the various regulations. On elevators without generator field control, the disconnecting means shall be located within sight of the motor controller. Thank you for your recent letter to the Occupational Safety and Health Administration (OSHA). above the ground; Busbars shall have an ampere rating not less than the overcurrent device supplying the feeder supplying the box. 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. A disconnecting means shall be provided in the supply circuit for each arc welder that is not equipped with a disconnect mounted as an integral part of the welder. If the disconnecting means is an integral part of the motor controller, it shall be operable without opening the enclosure. 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. Scenario: Workplace motor control centers have boxes with 480 volts disconnects and 110 volt control power with the same box. The overcurrent protective devices, the total impedance, the component short-circuit current ratings, and other characteristics of the circuit to be protected shall be selected and coordinated to permit the circuit protective devices used to clear a fault to do so without the occurrence of extensive damage to the electrical components of the circuit. Metal frames and metal parts of rides, concessions, trailers, trucks, or other equipment that contain or support electrical equipment. Doors or covers giving access to uninsulated parts of indoor signs or outline lighting exceeding 600 volts and accessible to other than qualified persons shall either be provided with interlock switches to disconnect the primary circuit or shall be so fastened that the use of other than ordinary tools will be necessary to open them. Means shall be provided at the operating station to open the power circuit to all motors of the crane or monorail hoist where the disconnecting means is not readily accessible from the crane or monorail hoist operating station. 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 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. Where the disconnecting means is out of the line of sight from any section that may be energized, the disconnecting means shall be capable of being locked in the open position. Would deenergizing the 110 volt control circuit as described in the scenario above be considered infeasible as delineated in the aforementioned standard? One of the most common questions people have when setting standards in a facility for electrical panel clearance requirements is what OSHA says. Swimming pools, fountains, and similar installations. Voltage testing should follow lock out/tag out. Control. When employees are trained to work safely, through the requirements, they should be able to anticipate and avoid injury from job related hazards. 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. OSHA's standard for general electrical requirements (29 CFR 1910.303) includes a section for establishing and maintaining space around electrical panels and other systems that require servicing, adjustments, or maintenance while energized. In previous NEC editions, transformers didn't require a disconnecting means. To keep apprised of such developments, you can consult OSHA's website at http://www.osha.gov. Cord connectors may not be laid on the ground unless listed for wet locations. OSHA's electrical standards are designed to protect employees exposed to dangers such as electric shock, electrocution, fires, and explosions. Lightning protection. Disconnecting means. 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. Closely following the new requirements in the 2002 NEC for motor disconnect locations will help make safety a reality. The OSHA training requirements for electrical safety. It shall also be protected by a ground-fault circuit interrupter installed in the branch circuit supplying the fixture. 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. Disconnecting means. Doors or detachable panels shall be employed for internal access. Busbar connectors shall be provided where conductors terminate directly on busbars; Receptacles shall have overcurrent protection installed within the box. Approval. 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). Most people think only about the area directly in front of the electrical panel. 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. By elevation of 2.44 m (8.0 ft) or more above the floor or other working surface. 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. A limit switch or other device shall be provided to prevent the load block from passing the safe upper limit of travel of any hoisting mechanism. Since electrical fires are one of the biggest risks that a facility can face, it should come as no surprise to find that the NFPA has requirements in this area. Low-Voltage Electrical Safety Orders (Sections 2299 - 2599) Group 2. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. Most facilities will already have floor marking tape on hand since it is one of the most commonly used safety items around. Cells used as a source of electric energy and for electroplating processes and cells used for production of hydrogen are not covered by this paragraph. 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. To keep apprised of such developments, you can consult OSHA's website at https://www.osha.gov. Where paralleled sets of current-carrying single-pole separable connectors are provided as input devices, they shall be prominently labeled with a warning indicating the presence of internal parallel connections. The disconnecting means shall be readily accessible and capable of being locked in the open position. The following requirements apply to elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts. 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. Listed, labeled, or certified equipment shall be installed and used in accordance with instructions included in the listing, labeling, or certification. Your letter has been referred to the Directorate of Enforcement Program's (DEP's) Office of General Industry Enforcement for an answer to your question regarding clearances from electrical equipment. These markings can include floor marking tape, floor signs, and labels. Electrical panels are an essential component in any facility. Capable of accepting a lock. This letter constitutes OSHA's interpretation of the requirements discussed. Many workers are unaware of the potential electrical hazards present in their work environment, which makes them more vulnerable to the danger of electrocution. 4. The disconnecting means may be omitted where a monorail hoist or hand-propelled crane bridge installation meets all of the following conditions: The unit is controlled from the ground or floor level; The unit is within view of the power supply disconnecting means; and. 6. 2.0 Meter. This Live Performance Safety Guideline highlights sections of the OESC that apply to the temporary and innovative nature of the live performance industry. 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? Carnivals, circuses, fairs, and similar events. Monitoring System (TPMS) Sensor Training in this section. 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. Flexible cords and cables shall be continuous without splice or tap between boxes or fittings. Electric equipment shall be free from recognized hazards that are likely to cause death or serious physical harm to employees. Examples of solutions include the use of insulation, guarding, grounding, electrical protective devices, and safe work practices. 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. By location on a balcony, gallery, or platform so elevated and arranged as to exclude unqualified persons. This is for ANY electrical panel including the corner of the condenser where the wiring enters. The sign shall be clearly legible and shall read WARNING - PARTS OF THE CONTROLLER ARE NOT DEENERGIZED BY THIS 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. If the voltage is higher than 50kV, the clearance shall be increased 4 in. 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 . 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