Are
those persons who are responsible for your electrical
installations or maintenance aware of these requirements?
Are
repairs and electrical connections made only by
persons who are familiar with all electrical requirements?
If your premises has a 240/120 volt, 1-phase,
3-wire system, is the neutral grounded?
If your premises has a 208/120 volt, 3-phase,
4-wire system, is the neutral grounded?
If your premises has a 240/120 volt, 3-phase,
4-wire system, is the midpoint of one phase grounded?
If
your premises has a 480Y/277 volt, 3-phase, 4-wire
system with 277 volt load connected, is the neutral
grounded?
Identification
Has a survey been made recently to check proper
identification?
Recognizing
that there may be more than one main switch at
the service entrance, is this situation clearly
shown?
Would
a fireman (not a plant electrician) be able to
recognize the main switch or switches?
Does each feeder have an identification indicating
its destination?
Is
the purpose of each disconnecting means (throughout
the premises) indicated by a key number or a description?
If key numbers or letters are used for identification,
is there an electrical diagram appropriately displayed
so that the key can be interpreted and the circuit
located?
Does each panelboard have a "legend"
indicating the purpose of each circuit breaker,
fuse or switch in the panelboard? (Example: #3
- lights, east side)
Are all identifications clear, permanent and legible?
In
any cases where the above methods are not used,
is the purpose of the disconnect obvious from
its location and arrangement?
Terminals
& Joints
Do
you have a policy of purchasing only approved
cords and devices that are suitable for intended
use?
Do you have an established procedure so that only
qualified persons assemble or repair cord connections?
Have
you made an inspection of your premises to detect
any pre-existing violations which should be corrected?
Flexible
Cords
Does
your plant have access to qualified electrical
personnel so that there is not tendency to try
to "get by" with flexible cord where
fixed wiring is more appropriate?
Are
there any instances presently existing where cords
are used for purposes other than those listed
above?
Are
inspections made periodically to detect improper
use of cords which may occur from time to time?
When changes or additions are planned, do you
allow for the work necessary for a proper electrical
installation?
Does the fixed wiring system of your premises
have some provision for extension of circuits
for new outlets as needed?
Are there any situations where "temporary"
wiring has been allowed to remain for periods
longer than can be justified?
Are there any places where cord is stapled, clamped
or otherwise attached to building surfaces?
Are cords draped through or over building steel?
Is any cord run through holes, doorways, windows?
Are all cords visible for their entire length
so they can be observed for damage or deterioration?
Guarding
of Live Parts
Are maintenance personnel instructed to close
doors, replace covers and to continuously watch
for missing covers?
Are
all supervisors and employees aware that whenever
they see exposed live parts, due to damage or
any other cause, they should stay clear and report
the situation?
Is open wiring with parts of conductor or connections
exposed found in your workplace?
Is live-front switchgear accessible to unqualified
persons?
Are motor controls protected from contact only
by inadequate barriers?
Do you have motors with brushes, commutators or
slip-rings with large unscreened end bells?
Are portable tools in such condition that live
parts are exposed?
Are lampholders connected in such a way that the
screw shell is supplied by the ungrounded (black)
wire?
Are unused conduit openings in boxes left without
closures so that pencils, coat-hangers, metal
chips, etc., can enter?
Location
of Overcurrent Devices
Are there any installations underway at this time
which should be checked for compliance?
Are there any fused switches, circuit breakers
or motor controllers located with the top of the
device higher than 6-1/2 feet above the floor?
In any cases as described above, can the hazard
be corrected by moving the devices to more accessible
locations?
Are there locations where a permanent ladder,
platform or catwalk might be the only solution?
Do
you have a genuine continuing program of checking
to make sure that obstacles are not placed in
front of switchboards, panelboards, fuses, circuit
breakers and motor starters?
Where
physical damage is a problem and relocation is
not a good solution, are you providing guard rails
or bars in front of such equipment?
Electrical
Connections
Are
proper materials available for making connections
and repairs which are required?
Is
any aluminum wire used for wiring on the premises?
If aluminum wire is used, are all connectors and
devices used approved for this material?
Do your employees know that they should report
the situation whenever they discover a receptacle,
switch or other device which seems to be overheating?
In particular, do you make sure that splicing
materials used are appropriate, considering possible
presence of oil, solvents, water, metal chips?
Marking
of Equipment
Are the persons who purchase this equipment aware
of these requirements?
Do
you have more than one type of electrical supply
available on your premises (A.C. vs D.C., 3-phase
vs 1-phase, 460 vs 230 vs 115 volts)?
In
places where there may be doubt as to these characteristics,
do you apply additional field-marking to indicate
the actual voltage, etc., involved?
Are there any nameplates which have been painted
over or which cannot be read for other reasons?
Have
employees been instructed to mask or protect nameplates
when painting?
Are there any cases where equipment is operating
at a temperature above the safe temperature shown
on the nameplate?
If your premises includes any hazardous locations
(Class I, II or III) are there visible nameplates
showing he equipment is listed as suitable for
such locations?
Working
Clearances About Electrical Equipment
Are the persons who plan your layouts and equipment
locations aware of these requirements?
Are
the spaces necessary for operation and maintenance
marked or otherwise adequately protected to prevent
encroachment?
Is there an ongoing program to ensure that these
precautions will not be forgotten?
Are there switchboards, panelboards, switches,
circuit breakers, motor starters or other types
of controllers, which do not have the specified
working space?
In cases where violations exist, can they be corrected
by rearranging the equipment or by applying a
permanent insulating covering to the intruding
surfaces?
In
cases where clearances cannot be obtained, can
precautions be taken to ensure that the equipment
will not be examined, adjusted, serviced or maintained
while alive
Grounding
of Fixed Equipment, General & Specific
Is fixed equipment supplied by fixed wiring methods?
Are there any locations where a metallic raceway
or other equipment-grounding conductor is brought
close to a machine or other equipment, but not
bonded to such equipment?
Can you find any ungrounded fixed electrical equipment
which a person can touch while touching other
metallic surfaces or standing on earth or masonry
floors?
Are there locations where equipment is assumed
to be grounded simply because it is in contact
with other metallic surfaces or with earth?
If there are cases as described above, can you
verify that such contact provides a low-impedance
ground-fault path?
Are your employees taking special precautions
in wet or damp locations to assure that the ground
fault path is permanent and continuous?
Grounding
of Equipment Connected by Cord & Plug
Do you have a standard procedure of providing
grounding-type receptacles wherever equipment
requiring grounding is likely to be used?
Have
you checked older installation to assure that
the old 2-wire cords and plugs have been replaced
to provide grounding where required?
Are you aware that water coolers, dehumidifiers
and cooled vending machines have refrigerating
units and are required to be grounded?
Do you have any office-type appliances, such as
electric typewriters and fans which are sometimes
used in factory areas?
If appliances as above are used in areas having
concrete floors (considered a wet-n-conductive
location), are they equipped for proper grounded?
Where existing equipment is found to be improperly
grounded, are you replacing 2-wire cords and caps
with 3-wire cords having approved 3-prong grounding-type
plug caps?
In replacing cords as above, is care being exercised
to assure that all connections are made in an
approved manner?
