Safety Labels
Arc Flash Labels & Signs
Arc Flash Safety
 Arc
Flash labels are not required by code. The
NFPA 70E code applies to arc flash. Neither this code, nor OSHA
requires that arc flash labels be used. HOWEVER, properly labeling
arc flash hazard areas is an important component of safety AND should
you have an arc flash incident you can expect that a lack of labeling
will weigh against you in the following investigation.
What information should be on an arc flash label?
NFPA 70-NEC Section 110.16 requires that the label state that an
arc flash hazard exists. HOWEVER, it is suggested that the label
include information describing the specific hazards. Each arc flash
hazard is unique. For example, the following information is commonly
found on arc flash labels:
Flash Protection Boundary
 This
is the closest anyone can approach the equipment that has the potential
for an arc flash, without the use of PPE (Personal Protective Equipment).
Limited Shock Approach Boundary
This boundary may only be crossed by a "qualified"
person who has been trained in the hazards of the particular component
or equipment being services. An "unqualified" person may
enter this boundary if accompanied by a qualified person.
Restricted Shock Approach Boundary
Only a qualified person using adequate shock prevention equipment and
techniques may cross this
boundary.
PPE Required
This part of the label identifies the Personal
Protective Equipment (PPE) that must be used. This includes shoes,
gloves, flame resistant clothing, safety glasses, etc.
 Arc
Flash Label Colors and Design
As you can see from the arc flash labels shown
here, a variety of styles are used. There are no standards for how
an arc flash label is designed. In general, if it is a WARNING
label the color orange should be used. If it is a DANGER
label, the color red should be used.
The top example shows a die cut label with a preprinted
header and lines dividing the label into four areas. In this case
the top white area is used for header information; the left box
is used for arc flash information; the right box is used to shock
hazard information; and the area at the bottom is used to which
the label applies.
The middle example is another die cut label. In
this case the label comes with a preprinted warning header. The white
area in the middle of the label is used for whatever information
the owners of the equipment determine should be on the label.
The lower label is an example of an arc flash
label made using continuous vinyl. As long as it warns that an arc
flash hazard exists (NFPA 70-NEC Section
110.16) it can include any other information.
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