(E) (2) Dedicated Equipment Space Outdoors Code Change Summary The dedicated equipment space requirements for certain outdoor equipment has been reworked into a list format and an exception was added Switchboards, switchgear, panelboards, and motor control centers have specific dedicated equipment space requirementsThe purpose for the National Electrical Code is to provide a safe installation, but Article 110 is perhaps focused a little more on providing an installation that is safe for the installer and maintenance electrician, so time spent inAnalysis Section (A) (3) describes the height of the working space and allows for electrical equipment to intrude into the working space for a maximum depth of 6" This can often be seen in equipment rooms that have a wireway protruding outward above or below a panelboard
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Nec 110.26 working space
Nec 110.26 working space-Section of the National Electrical Code (NEC) requires specific minimums for working space around electrical equipment Section is divided into six subsections, and some of them contain even more subsectionsSpaces About Electrical Equipment Access and working space are required around all electrical equipment to allow safe operation and maintenance (A) Working Space Equipment likely to require examination, adjustment, servicing, or maintenance while energized must have working space in accordance with (A)(1) through (A)(4)
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NEC (A) (2) states that "the width of the working space in front of the electrical equipment shall be the width of the equipment or 762 mm (30 in), whichever is greater" In addition, this work space shall permit at least a 90degree opening of the panelboard doorThis requirement first appeared in the 1987 NEC Height of working space Sec (a)(3)(e) As a general rule, you must maintain a minimum headroom clearance of 6 ft from the floor or platform up to any overhead obstruction This workspace is mandatory and applies to service equipment, switchboards, panelboards, and motor control centersRe NEC / Equipment in Outdoor Enclosures In my opinion per (A)(1) depth of working space is from the exterior of the enclosure if the equipment is an industrial control panel per 4092 or a motor control center
In the NEC, working space requirements are found primarily in Article 110 NEC applies to electrical equipment operating at 600 volts or less The primary requirement is that both access and working space must be provided and maintained for all electrical equipment (Photo 1)NEC (C) Entrance to Working Space (2) Large Equipment For equipment rated 10 amperes or more that contains overcurrent devices, switching devices, or control devices, there shall be one entrance to the required working space not less than 610 mm (24 in) wide and m (6 1/ 2 ft) high at each end of the working spaceIndoor installations shall comply with (E) (1)(a) through (E)(1)(d) (a) Dedicated Electrical Space The space equal to the width and depth of the equipment and extending from the floor to a height of 18 m (6 ft) above the equipment or to the structural ceiling, whi chever is lower, shall be dedicated to the electrical installation
Egress and working space for rooms containing electrical overcurrent devices, switching devices, or control devices shall be in compliance with the International Fire Code and Section of NFPA 70 Background 15 IFC 6053 Working space and clearance A working space ofnot less than 30 inches (762 mm) in width, 36Workspace If equipment may require examination, adjustment, servicing, or maintenance while energized, you must install it in a workspace in accordance with items (1), (2), and (3) of (A) The phrase "while energized" is the root of many debatesTable (A)(1) Working Spaces Minimum Clear Distance Nominal Voltage to Ground Condition 1 Condition 2 Condition 3 0–150 900 mm(3 ft) 900 mm (3 ft) 900 mm (3 ft) 151–600 900 mm (3 ft) 11 m (3?
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To be on the safe side, the working space and space around electrical equipment should always be clear per (A), if possible 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 6½ feet of headroom spaceFt) 12 m (4 ft)Reference National Electrical Code (NEC) Table (A)(1)) Condition 1—Exposed live parts on one side of the working space and no live or grounded parts, including concrete, brick, or tile walls are on the other side of the working space Condition 2—Exposed live parts on one side of the working space and grounded parts, including
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If you have a room that meets the above requirements, (C) (2) states that these electrical rooms must have an entrance/egress that is at least 24 inches wide and 65 feet tall at EACH end of the working space Working space requirements appear in Table (A) (1)The clear working space that is required by the first sentence as described in (A) may be eliminated only where examination, adjustment, servicing and maintenance are not "likely" to occur when energized exposed live parts, etc, are present" , 0649 PM #2(f)(1)(a) The dedicated space above equipment is now defined as a space extending from the floor to a height of 6 feet above the equipment or to the structural ceiling whichever is lower No piping, ducts, or equipment foreign to the electrical installation shall be installed in this space Got that Let's Go!
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NEC 14 Article (B) Clear Spaces Working space required by this section shall not be used for storage When normally enclosed live parts are exposed for inspection or servicing, the working space, if in a passageway or general open space, shall be suitably guardedIn the NEC, working space requirements are found primarily in Article 110 NEC applies to electrical equipment operating at 600 volts or less The primary requirement is that both access and working space must be provided and maintained for all electrical equipment (Photo 1)The NEC requires one means of access and entrance to the working space where the workspace is doubled per Table (a), based on conditions 1, 2, or 3 With the workspace doubled in front of the equipment, a worker can move back out of the endangered workspace and exit along the length of the equipment
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11 Code Language (C)(3) Personnel Doors Where equipment rated 10 A or more that contains overcurrent devices, switching devices, or control devices is installed and there is a personnel door(s) intended for entrance to and egress from the working space less than 76 m (25 ft) from the nearest edge of the working space, the door(s) shall open in the direction of egress and beAnalysis Section (A) (3) describes the height of the working space and allows for electrical equipment to intrude into the working space for a maximum depth of 6" This can often be seen in equipment rooms that have a wireway protruding outward above or below a panelboardThe working space, which is measured from the enclosure front, must not be less than the distances contained in Table (A) (1) If you have grounded metal parts on the other side of the working space, you would need 3½ feet
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Only qualified electricians are permitted to perform maintenance work NEC article (A) ( 1) condition 3 states that exposed live parts on both sides of the working space require minimum clear distance of 4ft NEC does not explain the dead front panel working space requirements between panelsIn the 17 NEC, the basic rule in Section (C) (2) required an entry/exit at each end of the working space for large equipment when both of the following two circumstances were present Electrical equipment was rated 10 amps or more and contained overcurrent devices, switching devices, or control devices andNEC Table (A) (1) provides the minimum required work space depth for electrical equipment rated volts (to ground) that is likely to be examined or worked on while energized
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Article 110 sets the stage for how you'll implement the rest of the NEC This article contains a few of the most important and yet neglected parts of the Code For example in accordance with industry accepted safe work practice standards Note 1 NFPA 70E, Standard for Electrical Safety in the Workplace, proArticle Requires that sufficient access and working space shall be provided and maintained around all electrical equipment to permit ready and safe operation and mainte nance of such equipmentRE NEC Workig Clearance Requirements rcw retired EE (Electrical) 7 Jun 12 17 My interpretation is that working space depth is only doubled if there is only one egress from the space
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The working space is defined in all three dimensions depth, width, and height Some of the working space requirements found in Section (NEC05) include (A) Working Space Working space for equipment operating at 600 volts, nominal, or less to ground and likely to require examination, adjustment, servicing, or maintenance whileNEC Article Electrical Room "Basics" Electrical Equipment Rated at 1,000 V or More, Article #3 of 3 April 2, 19 Dear Colleague To recap Article #1 from March 5th and as required by OSHA, NFPA and the NEC "working space around electrical enclosures or equipment shall be adequate for conducting all anticipated maintenance andThe purpose for the National Electrical Code is to provide a safe installation, but Article 110 is perhaps focused a little more on providing an installation that is safe for the installer and maintenance electrician, so time spent in
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In the NEC, the language in for working space about electrical equipment rated over 1000 volts was revised to align with similar requirements in Section for installations rated 1000 volts or less The previous code language allowed for the working space to be either 6 ½ feet high or no less than 3 feet wideNEC (A) (2) states that "the width of the working space in front of the electrical equipment shall be the width of the equipment or 762 mm (30 in), whichever is greater" In addition, this work space shall permit at least a 90degree opening of the panelboard doorEXHIBIT A working space with one entrance, which is permitted if the working space required by (A) is doubled see Table (A)(1) for permitted dimensions of X Where the entrance(s) to the working space is through a door, each door must comply with the requirements for swinging open in the direction of egress and
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(A) Working Space Working space for equipment operating at 600 volts, nominal, or less, to ground and likely to require examination, adjustment, servicing, or maintenance while energized shall comply with the dimensions of (A) (1), (A) (2), and (A) (3) or as required or permitted elsewhere in this CodeIf you have a room that meets the above requirements, (C) (2) states that these electrical rooms must have an entrance/egress that is at least 24 inches wide and 65 feet tall at EACH end of the working space Working space requirements appear in Table (A) (1)Indoor installations shall comply with (E) (1)(a) through (E)(1)(d) (a) Dedicated Electrical Space The space equal to the width and depth of the equipment and extending from the floor to a height of 18 m (6 ft) above the equipment or to the structural ceiling, whi chever is lower, shall be dedicated to the electrical installation
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The national electric code • nec • adopted by the louisiana legislature as law • not a design manual • is a minimum standard nec article working space shall be provided and maintained about all electric equipment likely to require while energized working space shall beIf you read Section (NEC05) you will observe that the disconnecting means requires a minimum amount of working space The working space is defined in all three dimensions depth, width, and height Some of the working space requirements found in Section (NEC05) includeConsidering that, there must still be amicable working space to work on equipment, including the replacement of components and the disassembly and removal of cover panels and doors as required by
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Width of working space around electrical equipment NEC (A) (2) Working space around electrical equipment must be as wide as the equipment or 30 inches, whichever is greater Height of working space around electrical equipment NEC (A) (3) For installations built before August 13, 07, the height of the working space must be 625 ftSection of the National Electrical Code (NEC) requires specific minimums for working space around electrical equipment Section is divided into six subsections, and some of them contain even more subsectionsWorking space for equipment shall be provided and maintained per subsection (A) to permit ready and safe operation of such equipment The placement of bollards within working space, even if they are removable is prohibited, since they don't permit ready access to the equipment
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The minimum width of the working space is 30 in or the width of the equipment, whichever is greater, and all doors or panels must be able to open to 90 degrees or more This is the same as the general requirement found in (A) (2)NEC article (A) (1) condition 3 states that exposed live parts on both sides of the working space require minimum clear distance of 4ft NEC does not explain the dead front panel working space requirements between panels Under all circumstances, there are no live parts exposed to persons entering the electrical roomReference National Electrical Code (NEC) Table (A)(1)) Condition 1—Exposed live parts on one side of the working space and no live or grounded parts, including concrete, brick, or tile walls are on the other side of the working space Condition 2—Exposed live parts on one side of the working space and grounded parts, including
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In order to create safe working conditions, OSHA and the NEC provide working space requirements that vary according to the hazards involved with the installation and equipment The NEC starts by stating the space must be sufficient for "ready and safe operation and maintenance" of electrical equipmentThe 11 NEC revises (A) (3) to include all of the height requirements found in and adds a new exception for meters in meter sockets The height of the working space in front of equipment can't be less than 6½ ft, measured from the grade, floor, platform, or the equipment height (whichever is greater), as shown in Fig 4
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