High Voltage Lines Checklist
(Taken from the "Tailgate Meetings that Work : A Guide
to Effective Construction Safety Training" series) |
|
Robin Baker, Robert
Downey, Mary Ruth Gross, Charles Reiter
Labor Occupational Health Program
(LOHP) School of Public Health,
University of California, Berkeley Ca.
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 the
appears.
- Citations
in brackets are from Title 8 of the California Administrative Code.
HAZARD IDENTIFICATION
- 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]
NOTIFICATION AND RESPONSIBILITY
- 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)]
WARNING SIGNS
- 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.
MINIMUM CLEARANCE
- 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)
|
600.......50,000
|
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]
|
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. |
Area
on
Site
|
Line
Voltage
|
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)]
PERSONAL PROTECTIVE EQUIPMENT
AND FIRST AID
- 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)]
Tailgate
Meetings That Work : Collection
Published in June, 1994 by:
Labor Occupational Health Program, School of Public Health, 2515 Channing
Way, University of California, Berkeley, CA 94720. Phone: (510) 642-5507.
Permission is granted to duplicate these materials for non-profit educational
purposes, provided that copies are not offered for sale.
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