Other factors which contribute to the practical safeguarding of employees using or likely to come in contact with the equipment. If equipment is exposed to physical damage from vehicular traffic, guards shall be provided to prevent such damage. Control power is off on a large number of machines. D-TPMS, Service required and DTC's DTC Diagnostic Trouble Codes with D-TPMS can be identified by one of the following VDN codes:. At least one entrance of sufficient area shall be provided to give access to the working space about electric equipment. 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. A disconnecting means shall be provided in the supply circuit. 5 Steps Before Working Lines or Equipment as De-Energized. Electrolytic cells. for information on the final rule. The disconnecting means shall be capable of being locked in the open position. 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. 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. Additional lighting fixtures are not required where the working space is illuminated by an adjacent light source. This paragraph applies to X-ray equipment. Amusement rides or attractions may not be located under or within 4.57 m (15 ft) horizontally of conductors operating in excess of 600 volts. Motors and appliances. 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? 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. 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. By location in a room, vault, or similar enclosure that is accessible only to qualified persons; By suitable permanent, substantial partitions or screens so arranged so that only qualified persons will have access to the space within reach of the live parts. AOP Forum Rules: Rules For Equipment Owners. Electrical equipment shall not be used unless the manufacturer's name, trademark, or other descriptive marking by which the organization responsible for the product may be identified is placed on the equipment and unless other markings are provided giving voltage, current, wattage, or other ratings as necessary. Listed or labeled equipment shall be installed and used in accordance with any instructions included in the listing or labeling. Note to paragraph (h)(5)(vi) of this section: Piping and other facilities are not considered foreign if provided for fire protection of the electrical installation. The following hazards are the most frequent causes of electrical injuries: contact with power lines, lack of ground-fault protection, path to ground missing or discontinuous, equipment not used in manner prescribed, and improper use of extension and flexible cords. Warning labels or signs that read DANGER - HIGH VOLTAGE - KEEP OUT shall be attached to the equipment and shall be plainly visible where persons might contact energized parts when doors are opened or closed or when panels are removed from compartments containing over 250 volts ac or dc. On wheelchair lifts and stairway chair lifts, the disconnecting means shall be located within sight of the motor controller. Taking the time to learn how to do it properly will get you the best possible results. While OSHA is only followed in the United States, NFPA is a non-governmental organization. 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. The minimum working space height required for this disconnect switch is 6 1 / 2 feet (see Figure 1). OSHA requirements are set by statute, standards and regulations. Metal-enclosed switchgear, unit substations, transformers, pull boxes, connection boxes, and other similar associated equipment shall be marked with appropriate caution signs. This fault shall be assumed to be either between two or more of the circuit conductors, or between any circuit conductor and the grounding conductor or enclosing metal raceway. The employer shall ensure that electrical equipment is free from recognized hazards that are likely to cause death or serious physical harm to employees. Interlock switches shall be connected in such a manner as to remove all power from the applicator when any one of the access doors or panels is open. For the NEC 2020, there's an added article titled 230.85 Emergency Disconnects. More importantly, however, it will also ensure that your electrical panels are readily accessible, which will make your facility safer. Reply: 29 CFR 1910.303(g)(2)(ii) and 1910.303(h)(2)(ii) address the protection of electric equipment that may be exposed to physical damage. 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. 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. The following equipment connected to the same source shall be bonded: Metal enclosures of electrical equipment; and. 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. Electrical is addressed in specific OSHA standards for general industry and maritime. 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. Removable links or removable conductors may be used as the disconnecting means. 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. They bring all the electrical lines into one centralized location so that the main power source can feed them. 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. 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. Outdoor electrical installations having exposed live parts shall be accessible to qualified persons only. Swimming pools, fountains, and similar installations. Of course, it is also important to try to determine who placed the item there so that they can be provided with the relevant training to ensure it does not happen again. Fire exit routes cannot be obstructed [29 CFR 1910.37 (a) (3)] and they cannot become more narrow at any point. Directorate of Enforcement Programs Where accessible to unqualified persons, the enclosure for the switch or circuit breaker shall be of the lockable type. Per the NEC, 30" wide by 36" front to back by 6.5' vertical clearance. ), whichever is greater. A single means to control both the electronic equipment and HVAC system is permitted. Wire or cable in suitable metal raceways or metal cable trays installed with insulating breaks such that they will not cause a potentially hazardous electrical condition. Mechanical strength and durability, including, for parts designed to enclose and protect other equipment, the adequacy of the protection thus provided. A disconnecting means shall be provided for each motor and controller. 1The minimum elevation may be 2.6 m (8.5 ft) for installations built before August 13, 2007. 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. Portable distribution and termination boxes. Front working space. Circuit impedance and other characteristics. Induction and dielectric heating equipment. Insulation integrity. 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. Most people think only about the area directly in front of the electrical panel. Note to paragraph (j)(1) of this section: In determining these dimensions, the distance to be measured is the shortest path the supply cord of an appliance connected to the receptacle would follow without piercing a floor, wall, or ceiling of a building or other effective permanent barrier. 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. 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