Except as elsewhere required or permitted in this subpart, the minimum clear working space in the direction of access to live parts of electric equipment may not be less than specified in Table S-2. To keep apprised of such developments, you can consult OSHA's website at https://www.osha.gov. Insulated wire or insulated busbars operating at not over 300 volts are not considered live parts. At first glance many people would read the NEC electrical panel clearance requirements and assume that it simply means that you cannot put any additional equipment within the set amount of space. They also Secondly, installation can be tricky if one switches from an electric unit to a hybrid gas water heater or vice versa because of the required retrofitting. Would deenergizing the 110 volt control circuit as described in the scenario above be considered infeasible as delineated in the aforementioned standard? Where bare energized parts at any voltage or insulated energized parts above 600 volts are located adjacent to such entrance, they shall be guarded. A disconnecting means shall be provided in the supply circuit. Other cord- and plug-connected, fixed or stationary equipment used with permanently installed pools. Except as elsewhere required or permitted by this standard, live parts of electric equipment operating at 50 volts or more shall be guarded against accidental contact by use of approved cabinets or other forms of approved enclosures or by any of the following means: Except as elsewhere required or permitted in this subpart, the minimum clear working space in the direction of access to live parts of electric equipment may not be less than specified in Table S-2. The disconnecting means shall be capable of being locked in the open position. The supply circuit disconnecting means is permitted as a heating equipment disconnecting means where the circuit supplies only one piece of equipment. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. Each service, feeder, and branch circuit, at its disconnecting means or overcurrent device, shall be legibly marked to indicate its purpose, unless located and arranged so the purpose is evident. 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. Distances shall be measured from the live parts, if they are exposed, or from the enclosure front or opening, if they are enclosed. 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. 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. 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. Fire exit routes cannot be obstructed [29 CFR 1910.37 (a) (3)] and they cannot become more narrow at any point. Table S-1 - Minimum Depth of Clear Working Space at Electric Equipment, 600 V or Less. One of the main things that the NEC 110.26 specifies is that all electrical panels must have enough room around them that someone working on the equipment will have the room to safely access everything they need. 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. To keep apprised of such developments, you can consult OSHA's website at https://www.osha.gov. Where installed outdoors, the box shall be of weatherproof construction and mounted so that the bottom of the enclosure is not less than 152 mm (6 in.) Some facilities will simply place the tape in a square around the panel to show the necessary distance that needs to be kept clear. Arcing parts. If anything is found in a spot that is too close to the panel, the items can be moved right away. Elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts. In addition, from time to time we update our guidance in response to new information. Flexible cords and cables run on the ground, where accessible to the public, shall be covered with approved nonconductive mats. The disconnecting means shall be within sight of the equipment served. In existing buildings where electrical equipment is being replaced, minimum 3' working clearance shall be permitted for nominal voltage to ground less than 151V or 3'-6" for nominal voltage to ground greater than 150V between dead-front switchboards, switchgear, Installations accessible to unqualified persons. Application. 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. 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. 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. 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. No underwater lighting fixtures may be installed for operation at over 150 volts between conductors. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. Distances shall be measured from the live parts, if they are exposed, or from the enclosure front or opening, if they are enclosed. Headroom. Standard Number: 1910.179 OSHA requirements are set by statute, standards and regulations. There would be no additional need to deenergize circuits for other equipment to deenergize a motor and its controller disconnected by an individual disconnecting means which meets paragraph 1910.305(j)(4) requirements. The safety-related work practices under paragraphs 1910.331 through 1910.335 are predicated on compliance with the aforementioned electrical installation requirements. Power supply circuits and receptacles for portable electric equipment. Switchboards, panelboards, and distribution boards installed for the control of light and power circuits, and motor control centers shall be located in dedicated spaces and protected from damage. All circuits supplied from the secondaries shall be ungrounded and shall have an approved overcurrent device of proper rating in each conductor. A wall, screen, or fence less than 8 feet (2.44 m) in height is not considered adequate to prevent access unless it has other features that provide a degree of isolation equivalent to an 8-foot (2.44-m) fence. Fortunately, the OSHA electrical panel clearance requirements are taken directly from the NEC. 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]. 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. On switchboard and control panels exceeding 48 inches (1.22 m) in width, there shall be one entrance at each end of such board where practicable. The disconnecting means shall be operable from a location readily accessible from the X-ray control. Electrical wiring for temporary lighting, where installed inside of tents and concessions, shall be securely installed, and, where subject to physical damage, shall be provided with mechanical protection. Hoses shall be of a nonconductive material. Motors and appliances. 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. Per the NEC, 30" wide by 36" front to back by 6.5' vertical clearance. The safety-related work practices under paragraphs 1910.331 through 1910.335 are predicated on compliance with the aforementioned electrical installation requirements. 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. In electric equipment rooms, the illumination may not be controlled by automatic means only. 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. Motor controllers. Occupational Safety and Health Administration, Outreach Training Program (10- and 30-hour Cards), OSHA Training Institute Education Centers, Severe Storm and Flood Recovery Assistance. Electrical Safety Orders. Metal frames and metal parts of rides, concessions, trailers, trucks, or other equipment that contain or support electrical equipment. Note to paragraph (g)(1)(vii)(A) of this section:A dropped, suspended, or similar ceiling that does not add strength to the building structure is not considered a structural ceiling. All electrical conductors and equipment shall be approved. This could be literally hundreds of machines. 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. 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. Each ride and concession shall be provided with a fused disconnect switch or circuit breaker located within sight and within 1.83 m (6 ft) of the operator's station. Fixed electric equipment may be bonded to the energized conductive surfaces of the cell line, its attachments, or auxiliaries. 508 Carpenter Road Closely following the new requirements in the 2002 NEC for motor disconnect locations will help make safety a reality. D-TPMS, Service required and DTC's DTC Diagnostic Trouble Codes with D-TPMS can be identified by one of the following VDN codes:. See if you can "orient" the disconnect so as to have requisite clearance in front. X-Ray equipment. All Rights Re Detachable panels not normally used for access to such parts shall be fastened in a manner that will make them difficult to remove (for example, by requiring the use of tools). Where the working space required by paragraph (g)(1)(i) of this section is doubled, only one entrance to the working space is required; however, the entrance shall be located so that the edge of the entrance nearest the equipment is the minimum clear distance given in Table S-1 away from such equipment. Each service, feeder, and branch circuit, at its disconnecting means or overcurrent device, shall be legibly marked to indicate its purpose, unless located and arranged so the purpose is evident. The disconnecting means shall be provided with a sign to identify the location of the supply-side overcurrent protective device. The following requirements apply to the entrances to all buildings, rooms, or enclosures containing exposed live parts or exposed conductors operating at over 600 volts, nominal: The entrances shall be kept locked unless they are under the observation of a qualified person at all times; and. Unless isolated from equipment by height or physical enclosures or covers that will afford adequate mechanical protection from vehicular traffic or accidental contact by unauthorized personnel or that complies with paragraph (g)(1)(vii)(A)(2) of this section, piping, ducts, or equipment foreign to the electrical installation may not be located in this area; The space equal to the width and depth of the equipment shall be kept clear of foreign systems unless protection is provided to avoid damage from condensation, leaks, or breaks in such foreign systems. Operation. Examples of solutions include the use of insulation, guarding, grounding, electrical protective devices, and safe work practices. 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. One of the easiest and most effective ways to make sure that nobody places anything in the area around your electrical panels is to mark the area with floor marking tape. Identification of disconnecting means and circuits. At least one entrance shall be provided to give access to the working space about electric equipment. The disconnecting means shall be a switch or circuit breaker, and its rating may not be less than that necessary to accommodate overcurrent protection. Condition C - Exposed live parts on both sides of the work space (not guarded as provided in Condition A) with the operator between. 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. Each service, feeder, and branch circuit, at its disconnecting means or overcurrent device, shall be legibly marked to indicate its purpose, unless located and arranged so the purpose is evident. For example, a switchboard is located next to a disconnect (safety) switch. Auxiliary nonelectrical connections. Group 1. The following requirements apply to elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts. Examination, installation, and use of equipment -. This would permit the motor disconnect to be located above 6'7" Chris Dennis Alwon Moderator Staff member Location Chapel Hill, NC Occupation Retired Electrical Contractor Working with electricity can be dangerous. 7. Occupational Safety and Health Administration, Outreach Training Program (10- and 30-hour Cards), OSHA Training Institute Education Centers, Severe Storm and Flood Recovery Assistance. These markings shall be of sufficient durability to withstand the environment involved. Electric equipment shall be installed in a neat and workmanlike manner. Materials such as solder, fluxes, inhibitors, and compounds, where employed, shall be suitable for the use and shall be of a type that will not adversely affect the conductors, installation, or equipment. This page provides information that may aid in controlling electrical hazards in the workplace. Equipment installed underwater shall be identified for the purpose. 1910.305 (g): Wiring requirements for flexible cords and cables. The dielectric breakdown level is further influenced by relative humidity, temperature, and degree of pollution in the environment. Cord- and plug-connected equipment. Disconnecting means required by this subpart shall be capable of being locked in the open position. While OSHA is only followed in the United States, NFPA is a non-governmental organization. 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. 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. Metal-enclosed switchgear, unit substations, transformers, pull boxes, connection boxes, and other similar associated equipment shall be marked with appropriate caution signs. 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. 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. Warning sign for multiple disconnecting means. 3. The provisions of paragraphs (j)(2), (j)(3), and (j)(4) of this section do not apply to equipment on the supply side of the service conductors. 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. The minimum working space height required for this disconnect switch is 6 1 / 2 feet (see Figure 1). 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. The ampere rating of this disconnecting means may not be less than the supply conductor ampacity. 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. The disconnecting means shall be readily accessible to the operator, including when the ride is in operation. 2932 Hazel Ave. 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. OSHA requirements are set by statute, standards and regulations. Signs or outline lighting systems operated by electronic or electromechanical controllers located external to the sign or outline lighting system may have a disconnecting means located within sight of the controller or in the same enclosure with the controller. 0.9 Meter. Exception. 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. Most people think only about the area directly in front of the electrical panel. A worker has to be qualified, trained and can demonstrate skills, while exposed to electrical hazards. 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 . When looking into electrical panel clearance safety, you need to start by looking at the requirements put in place by the national electric code, or NEC. Suitable enclosures or guards must be provided to prevent damage to this equipment. The width of Panel or 0.762 Meter which is Greater. Approval. By elevation of 8 feet (2.44 m) or more above the floor or other working surface and so installed as to exclude unqualified persons. 2. Control equipment that by its very nature or because of other requirements in this subpart must be adjacent to or within sight of its operating machinery is permitted in the dedicated space. Conductors shall be racked to provide ready and safe access in underground and subsurface enclosures that persons enter for installation and maintenance. Listed, labeled, or certified equipment shall be installed and used in accordance with instructions included in the listing, labeling, or certification. 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. Electricity has long been recognized as a serious workplace hazard. This means that you cannot leave an area around the electrical panel that is clear, but have access to the area blocked off by stacks of boxes or other items. Wire connectors or splicing means installed on conductors for direct burial shall be listed for such use. This means you cannot stack inventory in this area, you cannot park high-lows or other vehicles in the area, and you cannot even put temporary items in the area. Disconnecting means. The conductors and equipment required or permitted by this subpart shall be acceptable only if approved, as defined in 1910.399. OSHA's position that the main or emergency switches must be capable of being locked out. 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? 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. The electric panel door must be able to open to a 90-degree angle. These are generic codes which may not apply to all vehicles and we recommend you . 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