High Voltage Lines Checklist

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Labor Occupational Health Program

Summary Statement

A checklist of items to note when working near high voltage lines, such as distance required from the line, PPE and First Aid. Part of a collection. Click on the 'collection' button to access the other items.

These tailgate/toolbox talks were developed for use under California OSHA regulations. The complete set is available from the Labor Occupational Health Program at UC Berkeley. For ordering information, visit the website (www.lohp.org) The American Conference of Government Industrial Hygienists (ACGIH) has adapted these talks to apply to federal OSHA regulations. To contact ACGIH, visit its web site (www.acgih.org).

Date Prepared:_________________________ By:_______________________
Project Name/No.______________________ Location:__________________

  • Check the box if the statement is true.
  • Fill in the blanks where thePencil Icon appears.

  • Citations in brackets are from Title 8 of the California Administrative Code.


  • The company has a written Injury and Illness Prevention Program (IIPP) that meets all Cal/OSHA requirements. It includes identification of high voltage electrical hazards on the site, regular inspections, accident investigation, and correction of hazardous conditions. [1509]


  • Before any work begins within the minimum clearance distance of an overhead high voltage electrical line, the owner/operator of the line is notified. (See page 2 for clearance distances.) [2948]
  • Any overhead line is considered energized unless the owner verifies it is not energized and the line is visibly grounded. [2946(d)]
  • Work near energized overhead lines is done only by qualified persons unless steps are taken to guard against accidental contact. [2320.1(b)]
  • There are signs in plain view on all cranes, derricks, power shovels, pile drivers, and similar machinery, reading as shown below: [2947]

    • Unlawful to Operate This Equipment Within 10 Feet of High Voltage Lines of 50,000 Volts or Less. [2947]

    • For Minimum Clearances of High Voltage Lines in Excess of 50,000 Volts, See California Code of Regulations, Title 8, Article 37, High Voltage Electrical Safety Orders.


  • Unless an overhead high voltage electrical line is de-energized and visibly grounded, nothing comes within the minimum clearance distance at any time: [2946(b)(2) and (3)]
Clearances from Energized High Voltage Lines

Normal Voltage (Phase to Phase
Minimum Clearance for People and Most Equipment (Feet)
Minimum Clearance for Lifting and Hoisting Machinery (Feet)
6 ft.
10 ft.
over 50,000..........75,000
10 ft.
11 ft.
over 75,000........125,000
10 ft.
13 ft.
over 125,000......175,000
10 ft.
15 ft.
over 175,000......250,000
10 ft.
17 ft.
over 250,000......345,000
10 ft.
21 ft.
over 345,000......370,000
16 ft.
21 ft.
over 370,000......550,000
16 ft.
27 ft.
over 550,000......750,000
16 ft.
42 ft.
over 750,000...1,000,000
20 ft.
42 ft.

[2946, Table 1 and Table 2]

Pencil Icon Use the table on the previous page to determine required
minimum clearances on this job site. If voltages are different on
different parts of the site, list them separately for each area.

Clearance for People and Most Equipment
Clearance for Lifting and Hoisting Machinery

  • Tools, machinery, equipment, supplies, materials, or apparatus are stored beyond the required clearance distance from overhead high voltage electrical lines. [2946(b)(4)]
  • Workers and/or their equipment or materials are never over or above an energized overhead high voltage electrical line. [2946(b)(1)] (For tower crane exceptions see [2946(b)(1)(B).])
  • Calculation of clearance distances from overhead high voltage lines takes into account possible line movement due to strains on the supporting structures or attachments. [2946(c)]
  • Workers exposed to possible electric shock are provided and use suitable protective equipment or devices, such as insulated rubber gloves. [1518]
  • Workers exposed to possible electric shock or burns are provided and use approved head protection. For under 600 volts, head protection meets the requirements for Class A or B in American National Standards Institute (ANSI) standard Z 89.1 1986, Requirements for Protective Headwear for Industrial Workers. For over 600 volts, head protection meets the requirements for Class B. [3381(b) and (d)]
  • First aid equipment is available. There are personnel trained in first aid on-site. The site also has an effective communications system for contacting help. [1512(b), (c), and (e)]