Safety Clearance Recommendations for Electrical Panel
Safety Clearance Recommendations for Electrical Panel

Clearance Tables

  1. Working Space around Indoor Panel/Circuit Board (NES 312.2)
  2. Clearance around an Indoor electrical panel (NEC 110.26)
  3. Clearance for Conductor Entering in Panel (NES 408.5)
  4. Clearance between Bare Metal Busbar in Panel (NES 408.5)
  5. Clearance of Outdoor electrical panel to Fence/Wall (NES 110.31)
  6. Working Space around Indoor Panel/Circuit Board (NES 110.34)
  7. Clearance around an Outdoor electrical panel (NES 110.31)
  8. Elevation of Unguarded Live Parts above Working Space (NES 110.34E)
  9. Working Space for Panel (Code Georgia Power Company)

Working Space around Indoor Panel/Circuit Board (NES 312.2)

Voltage Exposed live parts to Not live parts (or grounded parts) Exposed live parts to Grounded parts (concrete/ brick/walls) Exposed live parts on both sides
Up to 150 V 0.914 Meter (3 Ft) 0.914 Meter (3 Ft) 0.914 Meter (3 Ft)
150 V to 600 V 0.914 Meter (3 Ft) 1.07 Meter (3’6”) 1.22 Meter (4 Ft)

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Clearance around an Indoor electrical panel (NES 110.26)

Description of Clearance Distance (min)
Left to Right the minimum clearance 0.9 Meter (3 Ft)
Distance between Panel and wall 1.0 Meter
Distance between Panel and Ceiling 0.9 Meter
Clear Height in front of Panel >480V 2.0 Meter
Clear Height  in front of Panel <480V 0.9 Meter (3 Ft)
Clearance When Facing Other Electrical Panels <480V 0.9 Meter (3 Ft)
The width of the workingspace in front of the Panel The width of Panel or 0.762 Meter which is Greater.
Headroom of working spaces for panel boards (Up to 200Amp) Up to 2 Meter
Headroom of working spaces for panel boards (More than 200Amp & Panel height is max 2 Meter) Up to 2 Meter (If Panel height is max 2 Meter)
Headroom of working spaces for panel boards (More than 200Amp & Panel height is more than 2 Meter) If Panel height is more than 2 Meter than clearance should not less than panel Height
Entrance For Panel (More than 1200 Amp and over 1.8 m Wide) One entrance required for working space (Not less than 610 mm wide and 2.0 m high)
Personal Door For Panel (More than 1200 Amp) Personnel door(s) intended for entrance to and egress from the working space less than 7.6 m from the nearest edge of the working space
Dedicated Electrical Space. Required Space is width and depth of the Panel and extending from the floor to a height of 1.8 m (6 ft) above the equipment or to the structural ceiling, whichever is lower
The door(s) shall open in the direction of egress and be equipped with panic bars, pressure plates, or other devices that are normally latched but open under simple pressure
The work space shall permit at least a 90 degree opening of equipment doors or hinged panels

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Clearance for Conductor Entering in Panel (NES 408.5)

Description of Clearance Distance (min)
Spacing between The conduit or raceways (including their end fittings) and bottom of enclosure Not rise more than 75 mm (3 in) above the bottom of the enclosure
Spacing between bottom of enclosure and insulated busbars, their supports 200 mm
Spacing between bottom of enclosure and non-insulated busbars 200 mm

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Clearance between Bare Metal Busbar in Panel (NES 408.5)

Voltage Opposite Polarity Mounted on Same Surface Opposite Polarity Where Held Free in Air Live Parts to Ground
Up to 125 V 19.1 mm 12.7 mm 12.7 mm
125 V to 250 V 31.8 mm 19.1 mm 12.7 mm
250 V to 600 V 50.8 mm 25.4 mm 25.4 mm

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Clearance of Outdoor electrical panel to Fence/Wall (NES 110.31)

Voltage Distance (min)
600 V to 13.8 KV 3.05 Meter
13.8 KV to 230 KV 4.57 Meter
Above 230 KV 5.49 Meter

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Working Space around Indoor Panel/Circuit Board (NES 110.34)

Voltage Exposed live parts to Not live parts (or grounded parts) Exposed live parts to Grounded parts (concrete/brick/ walls) Exposed live parts on both sides
601 V to 2.5 KV 0.914 Meter (3 Ft) 1.2 Meter (4 Ft) 1.5 Meter (5 Ft)
2.5 KV to 9.0 KV 1.2 Meter (4 Ft) 1.5 Meter (5 Ft) 1.8 Meter (6 Ft)
9.0 KV to 25 KV 1.5 Meter (5 Ft) 1.8 Meter (6 Ft) 2.5 Meter (8 Ft)
25 KV to 75 KV 1.8 Meter (6 Ft) 2.5 Meter (8 Ft) 3.0 Meter (10 Ft)
Above 75 KV 2.5 Meter (8 Ft) 3.0 Meter (10 Ft) 3.7 Meter (12 Ft)

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Clearance around an Outdoor electrical panel (NES 110.31)

Description of Clearance Distance (min)
Clear work space Not less than 2.0 Meter high (Measured vertically from the floor or platform) or not less than 914 mm (3 ft) wide (Measured parallel to the equipment)
Entrance For Panel(More than 1200 Amp and over 1.8 m Wide) One entrance required for working space (Not less than 610 mm wide and 2.0 m high)
Entrance For Panel: On Large panels exceeding 1.8 Meter in width One Entrance at each end of the equipment.
Non-metallic or Metal-enclosed Panel in general public and the bottom of the enclosure is less than 2.5 m (8 ft) above the floor or grade level Enclosure door or hinged cover shall be kept locked

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Elevation of Unguarded Live Parts above Working Space (NES 110.34E)

Voltage Elevation (min)
600 V to 7.5 KV 2.8 Meter
7.5 KV to 35 KV 2.9 Meter
Above 35 KV 2.9 Meter + 9.5 mm/KV

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Working Space for Panel (Code Georgia Power Company)

Voltage Exposed live parts to Not live parts (or grounded parts) Exposed live parts to Grounded parts (concrete/brick/walls) Exposed live parts on both sides
Up to 150 V 3.0 Meter 3.0 Meter 3.0 Meter
150 V to 600 V 3.0 Meter 3.5 Meter 4.0 Meter
600 V to 2.5 KV 3.0 Meter 4.0 Meter 5.0 Meter
2.5 KV to 9 KV 3.0 Meter 4.0 Meter 6.0 Meter
9 KV to 25 KV 5.0 Meter 6.0 Meter 6.0 Meter

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*** NES – National environmental standards for electricity transmission activities

About Author //

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Jignesh Parmar

jiguparmar - Jignesh Parmar has completed M.Tech (Power System Control) ,B.E(Electrical). He is member of Institution of Engineers (MIE),India. Membership No:M-1473586.He has more than 13 years experience in Transmission -Distribution-Electrical Energy theft detection-Electrical Maintenance-Electrical Projects (Planning-Designing-Technical Review-coordination -Execution). He is Presently associate with one of the leading business group as a Deputy Manager at Ahmedabad,India. He has published numbers of Technical Articles in "Electrical Mirror", "Electrical India", "Lighting India", "Industrial Electrix"(Australian Power Publications) Magazines. He is Freelancer Programmer of Advance Excel and design useful Excel base Electrical Programs as per IS, NEC, IEC,IEEE codes. He is Technical Blogger and Familiar with English, Hindi, Gujarati, French languages. He wants to Share his experience & Knowledge and help technical enthusiasts to find suitable solutions and updating themselves on various Engineering Topics.

6 Comments


  1. YOGESH KULKARNI
    Mar 03, 2016

    Dear Sir,
    Please guide me regarding incomer selection for the LV MCC Panel.It has to be done based on the BKW rating or the actaul connected load.?


  2. Cherry Gupta
    Jan 25, 2016

    Hello JP: Thanks for all the data above. Two comments:
    a. I believe NEC is been incorrectly mentioned as NES in the above article
    b. Some of the values need to be reaffirmed with respect to the latest NEC 2014. For eg, from Clearance for Conductor Entering in Panel (NES 408.5), the value for Noninsulated busbars is 250mm and not 200mm. Please add a disclaimer and ask the reader to refer to the latest version of NEC

  3. […] must be robust enough to ensure that a possible mechanical stress on these components (reduction in clearance distance, or even accidental contact with live parts) does not cause an […]


  4. tutut
    Jan 12, 2015

    is this international standard?
    because I works in environmental, health and safety field…and some issues are related with electrical…thank you.


  5. amgad
    Jan 28, 2014

    I would like to thank you for the interesting and good articles that you share each day. It would be very helpful to give the option to download these articles
    Thanks
    Amgad


  6. rhiren
    Oct 16, 2012

    dear sir,
    i am working with essar at last four year as a HT power distribution engineer , i have to know about thermography inspection in HT & LT SWBD

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