Temporary Power 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.
- 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 electrical hazards
on the site, regular inspections, accident investigation, and correction
of hazardous conditions. [1509]
GENERAL
- Only qualified
persons work on electrical equipment. [2320.1(a) and 2714(a)]
- All electrical
equipment and systems are de-energized and either locked out or tagged
out before anyone works on them. All affected workers are notified.
[2320.4 and 2320.6]
TEMPORARY WIRING
- Temporary wiring
is not used for more than one year on a construction site unless special
state permission is obtained. [2799(a)]
- Temporary wiring
is removed immediately when construction is complete or when the time
limit expires. [2799(b)]
- Conductors and
equipment are protected from overcurrent by circuit breakers, fuses,
etc., and can safely carry the load. [2390.1, 2716, and 2821]
- Temporary wood
poles used for wiring are a minimum of 6 inches square, or have a top
diameter of at least 5 inches if round. They are at least 20 feet long
and embedded at least 4 feet in the ground. [2405.3]
LOCATION AND MAINTENANCE
- Electrical equipment
and wiring are and safe condition. [2340.1]
- Electrical equipment
and wiring are protected from physical damage and environmental deterioration.
[2340.11, 2405.2(f), and 2712]
- Electrical equipment
and wiring exposed to physical damage are properly enclosed or guarded.
[2340.26 and 2713]
- Electrical equipment
and wiring are firmly secured. [2340.13 and 2710]
- Energized or live
parts of electrical equipment operating at 50 volts or more are protected
by approved enclosures. [2340.17(a) and 2717]
- Electrical cabinets
and other enclosures have appropriate warning signs. [2811]
- Suitable access
is provided to energized switches, circuit breakers, fuses, relays,
and similar controls if workers must use, examine, adjust, service,
or maintain them. [2340.16(a), 2340.27, 2711, and 2940] The workspace
provided around the equipment meets required minimum dimensions. [Table
2340.16(b)]
- Wiring is kept
16 feet above vehicle routes, and 12 feet above pedestrian routes. Required
clearance distances are also maintained for wiring above structures
and work areas.. [2375.18 and 2934]
- All electrical
control devices clearly indicate which equipment they control, and whether
they are on or off. [2715]
GROUNDING
- Grounding is assured
through either a ground fault circuit interrupter (GFI) system or an
assured equipment grounding conductor program. [2405.4(b)]
- If there is a
GFI system, approved GFI devices are present on all 120-volt, AC, single-phase,
15- and 20- ampere outlets which are not part of permanent building
wiring. [2405.5(c)]
- If there is a
grounding conductor program, the program is in writing and covers all
120-volt, AC, single-phase cord sets, plugs, and receptacles which are
not part of permanent building wiring. The program also includes daily
visual inspection, regular testing, ID markings placed on the equipment
and recordkeeping. [2405.4(d)]
- Earth returns
are not used for grounding. [2405.2(c)]
- Bonding is provided
where necessary to assure electrical continuity and safe electrical
conduction. [2395.70]
- Every receptacle
is grounded. [2510.7(a)]
CONDUCTORS AND CORDS
- Insulated single
conductors are approved types for the purpose, suitably supported, and
not subject to mechanical injury. [2405.2(a)]
- No bare conductors
are used for temporary wiring. [2405.2(a)]
- Multi-conductor
cords and cables are hard service type or equivalent, with multi-conductor
fittings. [2405.2(b)]
- Flexible cords
are used only for electrical connections to (a) elevators; (b) cranes
and hoists; (c) lamps, appliances, and equipment which are portable,
which must be interchanged frequently, or which must be removed frequently
for maintenance and repair. [2500.7(a) and 2522.8(c)]
- Flexible cords
are not used as a substitute for fixed wiring. [2500.8(a)]
- Flexible cords
are not run through holes in walls, ceilings, or floors, or through
doors or windows. They are not attached to building surfaces or concealed
behind walls, ceilings, or floors. [2500.8(a)]
- Flexible cords
are equipped with an attachment plug, and are energized from an approved
receptacle. [2500.7(b)]
- Flexible cords
are used only in continuous lengths without splices (except for repairs
by a qualified electrician on No. 12 cord or larger, if the splice retains
insulation). [2500.9(a)]
- Flexible cords
are connected so that strain relief is provided to prevent pull from
being directly transmitted to joints or terminal screws. [2500.10(a)]
- Flexible cords
are not placed near water, liquids, or metal capable of transmitting
current.
- 15- and 20-amp
attachment plugs have no exposed current-carrying metal parts except
prongs, blades, or pins. [2510.56(a)]
- Skirted attachment
plugs are used on all equipment operating at more than 300 volts. [2510.7(b)]
- Receptacles, cord
connectors, and attachment plugs are constructed to be non- interchangeable:
a receptacle will not accept a plug with a different voltage or current
rating. [2510.56(b)]
LAMPS
- Lamps are located
at least 7 feet vertically or 3 feet horizontally from the work area,
unless there are guards. [2405.2(d)]
- Open wire taps
from permanent wiring outlet boxes to lampholders are not more than
6 inches long. [2405.2(e)]
- Portable hand
lamps using flexible cords have a handle made of molded composition
or other approved material and a guard. [2510.6]
ELECTRICAL TOOLS
- All electrical
tools are grounded or double insulated. [2395.45]
- All exposed metal
parts of electrical power tools are grounded if they are likely to become
energized. [2395.45(a)]
- All electrical
power tools have appropriate switches and controls. [3557]
PORTABLE GENERATORS
- The frame of a
portable or vehicle-mounted low voltage generator is grounded unless
the generator is single-phase, rated not more than 5 KW, and the circuit
conductors of the generator are insulated. [2395.6]
HIGH VOLTAGE TEMPORARY POWER
SPECIAL REQUIREMENTS
- Temporary wiring
that carries high voltage (over 600 volts) is guarded by fencing, barriers,
or other means to keep out unauthorized personnel. [2798]
- Workspace around
high voltage equipment is not used as a passageway when energized parts
are exposed. [2936]
- There is adequate
illumination in high voltage areas, and those working on the equipment
are not endangered by live parts. [2933]
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, stricter requirements apply. [1515(a)(2-4)]
- First aid equipment
is available. There are personnel trained in first aid on-site. The
site also has an effective communication 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.
This paper appears in the eLCOSH website with the permission of the author
and/or copyright holder and may not be reproduced without their consent.
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