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6200 Appendix T4 Electrical Hazard Labeling |
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Jefferson Lab recognizes that electrical equipment may require
examination or diagnostics work (troubleshooting) while energized. To ensure
the safety of qualified workers authorized to perform such activities, these
items are labeled to warn of their potential shock and electric arc flash
hazards.
This appendix provides the process steps for identifying equipment
which needs labeling; clarifies Jefferson Lab’s labeling requirements; and
gives examples of the most common labels used.
Jefferson Lab applies the following considerations to determine
its electrical hazard labeling requirements:
·
Considers all potentials >
50Vac or 100Vdc to constitute a shock hazard.
·
Considers all circuits
capable of producing an arc flash of incident energy > 1.2 cal/cm2 at
normal working distance (18”) to constitute an arc flash hazard requiring Personal
Protective Equipment (PPE).
3.1
Anyone at Jefferson Lab
·
Request
an electrical hazard evaluation for a piece of electrical equipment.
·
Request
update, repair, or maintenance to an electrical hazard label.
3.2
Facility Management Electrical
Engineering
· Maintain the one-line and arc flash hazard analysis of the lab’s distribution system down to the lowest panelboard level or large utilization equipment if connected.
3.3
ESH&Q Electrical Safety Engineer
·
Provide electrical safety hazard analyses for unlabeled equipment
upon request.
4.1
Electrical
Hazard Evaluation
Anyone
at Jefferson Lab may request an electrical hazard evaluation for a piece of
electrical equipment. New equipment requiring
labels should be coordinated well in advance of installation so proper labeling
can be evaluated and prepared.
Contact
the Electrical
Safety Engineer and provide the location of the electrical hazard/equipment
needing review.
o
If
it is determined that the equipment requires a hazard label the Electrical
Safety Engineer or Facility management Electrical Engineering will proceed with
this activity.
4.2
Update or Replacement of Label
Anyone
at Jefferson Lab may request update or replacement to an electrical hazard label.
Contact
the Facility Management Electrical
Engineer and provide the location of the electrical hazard/equipment
needing review, or submit a Facilities Management service request via Work Request System.
o
If
it is determined that the label is defective/inferior the Facility Management
Electrical Engineer will rectify the situation.
4.3
Example
of Arc Flash Hazard Identification labels
at Jefferson Lab
Field marked
label to warn qualified persons of potential shock hazard.
Field marked label to warn qualified persons of potential
electric arc flash and shock hazards.
This label’s information includes
arc flash boundary distance, incident energy level, Hazard Risk Category for PPE,
electrical glove class, voltage level, shock approach boundaries, equipment
identification name and the equipments feed source. If a hazard analysis label
is not present, and work is to be performed on the equipment, then refer to ES&H Manual Chapter
6200 Appendix T2 Electrical Personal Protective Equipment (PPE) Selection
Procedure for further guidance or contact the ESH&Q ESE.
5.0
Reference
·
Standards
for Electrical Safety in the Workplace, NFPA-70E (2004)
6.0
Revision Summary
Periodic Review – 10/05/16 – No changes per TPOC
Revision
1.5 – 11/03/14 – Edits
per T.Kujawa with no substantive changes
Revision
1.4 – 11/14/13 – Changed
review required date from 08/01/16 to coincide with main chapter review date
Revision
1.3 – 08/01/13 – Periodic Review;
no substantive changes required
Revision
1.2 – 01/30/13 – Added
video link to Electrical Hazard Identification Label
Revision
1.1 – 12/10/12 – Added
sample “Caution” Label
Revision
1.0 – 05/10/12 – Updated
to reflect current laboratory operations
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ISSUING AUTHORITY |
TECHNICAL POINT-OF-CONTACT |
APPROVAL DATE |
REVIEW DATE |
REV. |
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ESH&Q
Division |
10/05/16 |
10/05/19 |
1.5 |
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