(1)
Electric signs and outline
lighting.
(a)
Disconnecting
means.
(i) Each sign and outline
lighting system, or feeder circuit or branch circuit supplying a sign or
outline lighting system, must be controlled by an externally operable switch or
circuit breaker that will open all ungrounded conductors. However, a
disconnecting means is not required for an exit directional sign located within
a building or for cord-connected signs with an attachment plug.
(ii) Signs and outline lighting systems
located within fountains must have the disconnect located at least 5 feet from
the inside walls of the fountain.
(b)
Location.
(i) The disconnecting means must be within
sight of the sign or outline lighting system that it controls. Where the
disconnecting means is out of the line of sight from any section that may be
energized, the disconnecting means must be capable of being locked in the open
position.
(ii) Signs or outline
lighting systems operated by electronic or electromechanical controllers
located external to the sign or outline lighting system may have a
disconnecting means located within sight of the controller or in the same
enclosure with the controller. The disconnecting means must disconnect the sign
or outline lighting system and the controller from all ungrounded supply
conductors. It must be designed so no pole can be operated independently and
must be capable of being locked in the open position.
(iii) You must provide either doors or covers
giving access to uninsulated parts of indoor signs or outline lighting
exceeding 600 volts and accessible to other than qualified persons with
interlock switches to disconnect the primary circuit or you must fasten them so
that the use of other than ordinary tools will be necessary to open
them.
(2)
Cranes and hoists. This subsection applies to the installation of
electric equipment and wiring used in connection with cranes, monorail hoists,
hoists, and all runways.
(a)Disconnecting means for runway
conductors. You must provide a disconnecting means between the runway
contact conductors and the power supply. Such disconnecting means must consist
of a motor-circuit switch, circuit breaker, or molded case switch. The
disconnecting means must open all ungrounded conductors simultaneously and must
be:
(i) Readily accessible and operable from
the ground or floor level;
(ii)
Arranged to be locked in the open position; and
(iii) Placed within view of the runway
contact conductors.
(b)
Disconnecting means for cranes and monorail hoists.
(i) Except as provided in (b)(iv) of this
subsection, you must provide a motor-circuit switch, molded case switch, or
circuit breaker in the leads from the runway contact conductors or other power
supply on all cranes and monorail hoists.
(ii) The disconnecting means must be capable
of being locked in the open position.
(iii) You must provide means at the operating
station to open the power circuit to all motors of the crane or monorail hoist
where the disconnecting means is not readily accessible from the crane or
monorail hoist operating station.
(iv) The disconnecting means may be omitted
where a monorail hoist or hand-propelled crane bridge installation meets all of
the following conditions:
(A) The unit is
controlled from the ground or floor level;
(B) The unit is within view of the power
supply disconnecting means; and
(C)
No fixed work platform has been provided for servicing the unit.
(c)
Limit
switch. You must provide a limit switch or other device to prevent the
load block from passing the safe upper limit of travel of any hoisting
mechanism.
(d)Clearance. The dimension of
the working space in the direction of access to live parts that may require
examination, adjustment, servicing, or maintenance while alive must be a
minimum of 2 feet 6 inches. Where controls are enclosed in cabinets, the doors
shall either open at least 90 degrees or be removable.
(3)
Elevators, dumbwaiters, escalators,
moving walks, wheelchair lifts, and stairway chair lifts. The following
requirements apply to elevators, dumbwaiters, escalators, moving walks,
wheelchair lifts, and stairway chair lifts.
(a)
Disconnecting means.
Elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and
stairway chair lifts must have a single means for disconnecting all ungrounded
main power supply conductors for each unit.
(b)Control panels. You must
locate control panels not located in the same space as the drive machine in
cabinets with doors or panels capable of being locked closed.
(c)Type. The disconnecting means
must be an enclosed externally operable fused motor circuit switch or circuit
breaker capable of being locked in the open position. The disconnecting means
must be a listed device.
(d)
Operation. No provision may be made to open or close this
disconnecting means from any other part of the premises. If sprinklers are
installed in hoistways, machine rooms, or machinery spaces, the disconnecting
means may automatically open the power supply to the affected elevators prior
to the application of water. No provision may be made to close this
disconnecting means automatically (that is, power may only be restored by
manual means).
(e)Location. You must locate the
disconnecting means where it is readily accessible to qualified persons.
(i) On elevators without generator field
control, you must locate the disconnecting means within sight of the motor
controller. You must provide driving machines or motion and operation
controllers not within sight of the disconnecting means with a manually
operated switch installed in the control circuit adjacent to the equipment in
order to prevent starting. Where the driving machine is located in a remote
machinery space, you must provide a single disconnecting means for
disconnecting all ungrounded main power supply conductors that is capable of
being locked in the open position.
(ii) On elevators with generator field
control, you must locate the disconnecting means within sight of the motor
controller for the driving motor of the motor-generator set. You must provide
driving machines, motor-generator sets, or motion and operation controllers not
within sight of the disconnecting means with a manually operated switch
installed in the control circuit to prevent starting. You must install the
manually operated switch adjacent to this equipment. Where the driving machine
or the motor-generator set is located in a remote machinery space, you must
provide a single means for disconnecting all ungrounded main power supply
conductors that is capable of being locked in the open position.
(iii) On escalators and moving walks, you
must install the disconnecting means in the space where the controller is
located.
(iv) On wheelchair lifts
and stairway chair lifts, you must locate the disconnecting means within sight
of the motor controller.
(f)Identification and signs.
(i) Where there is more than one driving
machine in a machine room, you must number the disconnecting means to
correspond to the identifying number of the driving machine that they
control.
(ii) You must provide the
disconnecting means with a sign to identify the location of the supply-side
overcurrent protective device.
(g)
Single-car and multicar
installations. On single-car and multicar installations, you must
provide equipment receiving electrical power from more than one source with a
disconnecting means for each source of electrical power. The disconnecting
means must be within sight of the equipment served.
(h)
Warning sign for multiple
disconnecting means. You must mount a warning sign on or next to the
disconnecting means where multiple disconnecting means are used and parts of
the controllers remain energized from a source other than the one disconnected.
The sign must be clearly legible and must read "WARNING-PARTS OF THE CONTROLLER
ARE NOT DEENERGIZED BY THIS SWITCH."
(i)
Interconnection between multicar
controllers. You must mount a warning sign worded as required in (h) of
this subsection on or next to the disconnecting means where interconnections
between controllers are necessary for the operation of the system on multicar
installations that remain energized from a source other than the one
disconnected.
(j)
Motor
controllers. Motor controllers may be located outside the spaces
otherwise required by this subsection provided they are in enclosures with
doors or removable panels capable of being locked closed and the disconnecting
means is located adjacent to or is an integral part of the motor controller.
Motor controller enclosures for escalators or moving walks may be located in
the balustrade on the side located away from the moving steps or moving
treadway. If the disconnecting means is an integral part of the motor
controller, it must be operable without opening the enclosure.
(4)
Electric
welders-Disconnecting means.
(a)
Arc welders. You must provide a disconnecting means in the supply
circuit for each arc welder that is not equipped with a disconnect mounted as
an integral part of the welder. The disconnecting means must be a switch or
circuit breaker, and its rating may not be less than that necessary to
accommodate overcurrent protection.
(b)
Resistance welders. You must
provide a switch or circuit breaker by which each resistance welder and its
control equipment can be disconnected from the supply circuit. The ampere
rating of this disconnecting means may not be less than the supply conductor
ampacity. The supply circuit switch may be used as the welder disconnecting
means where the circuit supplies only one welder.
(5)Information technology
equipment.
(a)
Disconnecting
means. You must provide a means to disconnect power to all electronic
equipment in an information technology equipment room. There must also be a
similar means to disconnect the power to all dedicated heating, ventilating,
and air-conditioning (HVAC) systems serving the room and to cause all required
fire/smoke dampers to close.
(b)Grouping. You must group and
identify the control for these disconnecting means and they must be readily
accessible at the principal exit doors. A single means to control both the
electronic equipment and HVAC system is permitted.
(c)Exception. Integrated
electrical systems covered by WAC
296-24-95713(7)
need not have the disconnecting means required by (a) of this
subsection.
(6)X-ray equipment. This
subsection applies to X-ray equipment.
(a)Disconnecting means.
(i) You must provide a disconnecting means in
the supply circuit. The disconnecting means must be operable from a location
readily accessible from the X-ray control. For equipment connected to a
120-volt branch circuit of 30 amperes or less, a grounding-type attachment plug
cap and receptacle of proper rating may serve as a disconnecting
means.
(ii) If more than one piece
of equipment is operated from the same high-voltage circuit, you must provide
each piece or each group of equipment as a unit with a high-voltage switch or
equivalent disconnecting means. The disconnecting means must be constructed,
enclosed, or located so as to avoid contact by employees with its live
parts.
(b)Control. The following
requirements apply to industrial and commercial laboratory equipment:
(i) You must effectively enclose radiographic
and fluoroscopic-type equipment or it must have interlocks that deenergize the
equipment automatically to prevent ready access to live current-carrying parts;
and
(ii) Diffraction- and
irradiation-type equipment must have a pilot light, readable meter deflection,
or equivalent means to indicate when the equipment is energized, unless the
equipment or installation is effectively enclosed or is provided with
interlocks to prevent access to live current-carrying parts during
operation.
(7)Induction and dielectric heating
equipment. This subsection applies to induction and dielectric heating
equipment and accessories for industrial and scientific applications, but not
for medical or dental applications or for appliances.
(a)Guarding and grounding.
(i) You must completely contain the
converting apparatus (including the DC line) and high-frequency electric
circuits (excluding the output circuits and remote-control circuits) within
enclosures of noncombustible material.
(ii) All panel controls must be of dead-front
construction.
(iii) Doors or
detachable panels must be employed for internal access. Where doors are used
giving access to voltages from 500 to 1000 volts AC or DC, either you must
provide door locks or you must install interlocks. Where doors are used giving
access to voltages of over 1000 volts AC or DC, you must provide either
mechanical lockouts with a disconnecting means to prevent access until circuit
parts within the cubicle are deenergized, or both door interlocking and
mechanical door locks. You must fasten detachable panels not normally used for
access to such parts in a manner that will make them difficult to remove (for
example, by requiring the use of tools).
(iv) You must attach warning labels or signs
that read "DANGER-HIGH VOLTAGE-KEEP OUT" to the equipment and they must be
plainly visible where persons might contact energized parts when doors are
opened or closed or when panels are removed from compartments containing over
250 volts AC or DC.
(v) You must
protect induction and dielectric heating equipment as follows:
(A) You must use protective cages or adequate
shielding to guard work applicators other than induction heating
coils;
(B) You must protect
induction heating coils by insulation or refractory materials or
both;
(C) You must use interlock
switches on all hinged access doors, sliding panels, or other such means of
access to the applicator, unless the applicator is an induction heating coil at
DC ground potential or operating at less than 150 volts AC; and
(D) You must connect interlock switches in
such a manner as to remove all power from the applicator when any one of the
access doors or panels is open.
(vi) You must provide a readily accessible
disconnecting means by which each heating equipment can be isolated from its
supply circuit. The ampere rating of this disconnecting means may not be less
than the nameplate current rating of the equipment. The supply circuit
disconnecting means is permitted as a heating equipment disconnecting means
where the circuit supplies only one piece of equipment.
(b)Remote control.
(i) If remote controls are used for applying
power, you must provide and interlock a selector switch to provide power from
only one control point at a time.
(ii) You must provide switches operated by
foot pressure with a shield over the contact button to avoid accidental closing
of the switch.
(8)
Electrolytic cells. This
subsection applies to the installation of the electrical components and
accessory equipment of electrolytic cells, electrolytic cell lines, and process
power supply for the production of aluminum, cadmium, chlorine, copper,
fluorine, hydrogen peroxide, magnesium, sodium, sodium chlorate, and zinc.
Cells used as a source of electric energy and for electroplating processes and
cells used for production of hydrogen are not covered by this subsection.
(a)Application. Installations
covered by subsection (8) of this section must comply with all applicable
provisions of this part, except as follows:
(i) Overcurrent protection of electrolytic
cell DC process power circuits need not comply with the requirements of WAC
296-24-95705(6);
(ii) Equipment located or used within the
cell line working zone or associated with the cell line DC power circuits need
not comply with the provisions of WAC
296-24-95705(7);
and
(iii) Electrolytic cells, cell
line conductors, cell line attachments, and the wiring of auxiliary equipment
and devices within the cell line working zone need not comply with the
provisions of WAC
296-24-95705 or
296-24-95703(2) and
(3).
(b)Disconnecting means. If more
than one DC cell line process power supply serves the same cell line, you must
provide a disconnecting means on the cell line circuit side of each power
supply to disconnect it from the cell line circuit. Removable links or
removable conductors may be used as the disconnecting means.
(c)Portable electric equipment.
(i) The frames and enclosures of portable
electric equipment used within the cell line working zone may not be grounded,
unless the cell line circuit voltage does not exceed 200 volts DC or the frames
are guarded.
(ii) You must
distinctively mark underground portable electric equipment and it must employ
plugs and receptacles of a configuration that prevents connection of this
equipment to grounding receptacles and that prevents inadvertent interchange of
ungrounded and grounded portable electric equipment.
(d)Power supply circuits and
receptacles for portable electric equipment.
(i) Circuits supplying power to ungrounded
receptacles for hand-held, cord- and plug-connected equipment must meet the
following requirements:
(A) You must
electrically isolate the circuits from any distribution system supplying areas
other than the cell line working zone and ensure that they are
ungrounded;
(B) The circuits must
be supplied through isolating transformers with primaries operating at not more
than 600 volts between conductors and protected with proper overcurrent
protection;
(C) The secondary
voltage of the isolating transformers may not exceed 300 volts between
conductors; and
(D) All circuits
supplied from the secondaries must be ungrounded and must have an approved
overcurrent device of proper rating in each conductor.
(ii) Receptacles and their mating plugs for
ungrounded equipment may not have provision for a grounding conductor and must
be of a configuration that prevents their use for equipment required to be
grounded.
(iii) Receptacles on
circuits supplied by an isolating transformer with an ungrounded secondary:
(A) Must have a distinctive
configuration;
(B) Must be
distinctively marked; and
(C) May
not be used in any other location in the facility.
(e)Fixed and portable
electric equipment.
(i) The following
need not be grounded:
(A) AC systems
supplying fixed and portable electric equipment within the cell line working
zone; and
(B) Exposed conductive
surfaces, such as electric equipment housings, cabinets, boxes, motors,
raceways and the like that are within the cell line working zone.
(ii) You must connect
auxiliary electric equipment, such as motors, transducers, sensors, control
devices, and alarms, mounted on an electrolytic cell or other energized surface
to the premises wiring systems by any of the following means:
(A) Multiconductor hard usage or extra hard
usage flexible cord;
(B) Wire or
cable in suitable nonmetallic raceways or cable trays; or
(C) Wire or cable in suitable metal raceways
or metal cable trays installed with insulating breaks such that they will not
cause a potentially hazardous electrical condition.
(iii) Fixed electric equipment may be bonded
to the energized conductive surfaces of the cell line, its attachments, or
auxiliaries. If fixed electric equipment is mounted on an energized conductive
surface, you must bond it to that surface.
(f)Auxiliary nonelectrical
connections. Auxiliary nonelectrical connections such as air hoses,
water hoses, and the like, to an electrolytic cell, its attachments, or
auxiliary equipment may not have continuous conductive reinforcing wire, armor,
braids, or the like. Hoses must be of a nonconductive material.
(g)Cranes and hoists.
(i) The conductive surfaces of cranes and
hoists that enter the cell line working zone need not be grounded. You must
insulate the portion of an overhead crane or hoist that contacts an energized
electrolytic cell or energized attachments from ground.
(ii) Remote crane or hoist controls that may
introduce hazardous electrical conditions into the cell line working zone must
employ one or more of the following systems:
(A) Isolated and ungrounded control
circuit;
(B) Nonconductive rope
operator;
(C) Pendant pushbutton
with nonconductive supporting means and with nonconductive surfaces or
ungrounded exposed conductive surfaces; or
(D) Radio.
(9)
Electrically driven or
controlled irrigation machines.
(a)Lightning protection. If an
irrigation machine has a stationary point, you must connect a grounding
electrode system to the machine at the stationary point for lightning
protection.
(b)Disconnecting
means.
(i) You must locate the main
disconnecting means for a center pivot irrigation machine at the point of
connection of electrical power to the machine or you must ensure that they are
visible and not more than 50 feet from the machine.
(ii) The disconnecting means must be readily
accessible and capable of being locked in the open position.
(iii) You must provide a disconnecting means
for each motor and controller.
(10)Swimming pools, fountains, and
similar installations. This subsection applies to electric wiring for
and equipment in or adjacent to all swimming, wading, therapeutic, and
decorative pools and fountains; hydro-massage bathtubs, whether permanently
installed or storable; and metallic auxiliary equipment, such as pumps,
filters, and similar equipment. Therapeutic pools in health care facilities are
exempt from these provisions.
(a)Receptacles.
(i) A single receptacle of the locking and
grounding type that provides power for a permanently installed swimming pool
recirculating pump motor may be located not less than 5 feet from the inside
walls of a pool. You must locate all other receptacles on the property at least
10 feet from the inside walls of a pool.
(ii) You must protect receptacles that are
located within 15 feet, or 20 feet if the installation was built after August
13, 2007, of the inside walls of the pool by ground-fault circuit
interrupters.
(iii) Where a pool is
installed permanently at a dwelling unit, at least one 125-volt, 15- or
20-ampere receptacle on a general-purpose branch circuit must be located a
minimum of 10 feet and not more than 20 feet from the inside wall of the pool.
You must locate this receptacle not more than 6 feet 6 inches above the floor,
platform, or grade level serving the pool.
Note: In determining these dimensions, the
distance to be measured is the shortest path the supply cord of an appliance
connected to the receptacle would follow without piercing a floor, wall, or
ceiling of a building or other effective permanent barrier.
(b)Lighting fixtures,
lighting outlets, and ceiling suspended (paddle) fans.
(i) In outdoor pool areas, lighting fixtures,
lighting outlets, and ceiling-suspended (paddle) fans may not be installed over
the pool or over the area extending 5 feet horizontally from the inside walls
of a pool unless no part of the lighting fixture of a ceiling-suspended
(paddle) fan is less than 12 feet above the maximum water level. However, a
lighting fixture or lighting outlet that was installed before April 16, 1981,
may be located less than 5 feet measured horizontally from the inside walls of
a pool if it is at least 5 feet above the surface of the maximum water level
and is rigidly attached to the existing structure. You must also protect it by
a ground-fault circuit interrupter installed in the branch circuit supplying
the fixture.
(ii) You must protect
lighting fixtures and lighting outlets installed in the area extending between
5 feet and 10 feet horizontally from the inside walls of a pool by a
ground-fault circuit interrupter unless installed 5 feet above the maximum
water level and rigidly attached to the structure adjacent to or enclosing the
pool.
(c)
Cord-
and plug-connected equipment. Flexible cords used with the following
equipment may not exceed 3 feet in length and must have a copper equipment
grounding conductor with a grounding-type attachment plug:
(i) Cord- and plug-connected lighting
fixtures installed within 16 feet of the water surface of permanently installed
pools; and
(ii) Other cord- and
plug-connected, fixed or stationary equipment used with permanently installed
pools.
(d)Underwater equipment.
(i) You must install a ground-fault circuit
interrupter in the branch circuit supplying underwater fixtures operating at
more than 15 volts. You must identify equipment installed underwater for the
purpose.
(ii) No underwater
lighting fixtures may be installed for operation at over 150 volts between
conductors.
(iii) A lighting
fixture facing upward must have the lens adequately guarded to prevent contact
by any person.
(e)Fountains. You must protect
all electric equipment, including power supply cords, operating at more than 15
volts and used with fountains by ground-fault circuit interrupters.
(11)
Carnivals, circuses,
fairs, and similar events. This subsection covers the installation of
portable wiring and equipment, including wiring in or on all structures, for
carnivals, circuses, exhibitions, fairs, traveling attractions, and similar
events.
(a)Protection of electric
equipment. You must provide electric equipment and wiring methods in or
on rides, concessions, or other units with mechanical protection where such
equipment or wiring methods are subject to physical damage.
(b)Installation.
(i) You must install services in accordance
with applicable requirements of this part, and, in addition, they must comply
with the following:
(A)Service equipment may
not be installed in a location that is accessible to unqualified persons,
unless the equipment is lockable; and
(B) You must mount service equipment on solid
backing and installed so as to be protected from the weather, unless the
equipment is of weatherproof construction.
(ii) You must maintain amusement rides and
amusement attractions not less than 15 feet in any direction from overhead
conductors operating at 600 volts or less, except for the conductors supplying
the amusement ride or attraction. Amusement rides or attractions may not be
located under or within 15 feet horizontally of conductors operating in excess
of 600 volts.
(iii) You must list
flexible cords and cables for extra-hard usage. When used outdoors, you must
also list flexible cords and cables for wet locations and must be sunlight
resistant.
(iv) Single conductor
cable must be size No. 2 or larger.
(v) Open conductors are prohibited except as
part of a listed assembly or festoon lighting installed in accordance with WAC
296-24-95705(3).
(vi) Flexible cords and cables must be
continuous without splice or tap between boxes or fittings. Cord connectors may
not be laid on the ground unless listed for wet locations. Connectors and cable
connections may not be placed in audience traffic paths or within areas
accessible to the public unless guarded.
(vii) Wiring for an amusement ride,
attraction, tent, or similar structure may not be supported by another ride or
structure unless specifically identified for the purpose.
(viii) You must cover flexible cords and
cables run on the ground, where accessible to the public, with approved
nonconductive mats. You must arrange cables and mats so as not to present a
tripping hazard.
(ix) You must
install a box or fitting at each connection point, outlet, switch point, or
junction point.
(c)
Inside tents and concessions. You must securely install electrical
wiring for temporary lighting, where installed inside of tents and concessions,
and, where subject to physical damage, you must provide it with mechanical
protection. You must protect all temporary lamps for general illumination from
accidental breakage by a suitable fixture or lampholder with a guard.
(d)
Portable distribution and
termination boxes. Employers may only use portable distribution and
termination boxes that meet the following requirements:
(i) Boxes must be designed so that no live
parts are exposed to accidental contact. Where installed outdoors, the box must
be of weatherproof construction and mounted so that the bottom of the enclosure
is not less than 6 inches above the ground;
(ii) Busbars must have an ampere rating not
less than the overcurrent device supplying the feeder supplying the box. You
must provide busbar connectors where conductors terminate directly on
busbars;
(iii) Receptacles must
have overcurrent protection installed within the box. The overcurrent
protection may not exceed the ampere rating of the receptacle, except as
permitted in WAC
296-24-95707(10)(d)
for motor loads;
(iv) Where
single-pole connectors are used, they must comply with the following:
(A) Where AC single-pole portable cable
connectors are used, they must be listed and of the locking type. Where
paralleled sets of current-carrying single-pole separable connectors are
provided as input devices, you must prominently label them with a warning
indicating the presence of internal parallel connections. The use of
single-pole separable connectors must comply with at least one of the following
conditions:
(I) Connection and disconnection
of connectors are only possible where the supply connectors are interlocked to
the source and it is not possible to connect or disconnect connectors when the
supply is energized; or
(II) Line
connectors are of the listed sequential-interlocking type so that load
connectors are connected in the following sequence:
* Equipment grounding conductor connection;
* Grounded circuit-conductor connection, if provided;
and
* Ungrounded conductor connection; and so that disconnection
is in the reverse order; or
(III) A caution notice is provided adjacent
to the line connectors indicating that plug connection must be in the following
sequence:
* Equipment grounding conductor connection;
* Grounded circuit-conductor connection, if provided;
and
* Ungrounded conductor connection; and indicating that
disconnection is in the reverse order; and
(B) Single-pole separable connectors used in
portable professional motion picture and television equipment may be
interchangeable for AC or DC use or for different current ratings on the same
premises only if they are listed for AC/DC use and marked to identify the
system to which they are connected;
(v) You must provide overcurrent protection
of equipment and conductors; and
(vi) You must bond the following equipment
connected to the same source:
(A) Metal
raceways and metal sheathed cable;
(B) Metal enclosures of electrical equipment;
and
(C) Metal frames and metal
parts of rides, concessions, trailers, trucks, or other equipment that contain
or support electrical equipment.
(e)
Disconnecting means.
(i) You must provide each ride and concession
with a fused disconnect switch or circuit breaker located within sight and
within 6 feet of the operator's station.
(ii) The disconnecting means must be readily
accessible to the operator, including when the ride is in operation.
(iii) Where accessible to unqualified
persons, the enclosure for the switch or circuit breaker must be of the
lockable type.
(iv) A shunt trip
device that opens the fused disconnect or circuit breaker when a switch located
in the ride operator's console is closed is a permissible method of opening the
circuit.
(12)
Safety procedure and protective equipment required for exposure to movie
theater Xenon bulbs.
Exposure also includes opening of the lamphouse where the
bulb is installed. The following are minimum requirements for theater personnel
or others who install, change, or dispose of Xenon bulbs and are exposed to
potential explosion hazard:
(a) You
must store all bulbs, new, used or subject to future disposal, in the
protective jacket provided until time of use;
(b) You must furnish protective equipment at
no cost to the employee and the use shall be strictly enforced for any exposed
employee. Basic safety equipment required is:
(i) Full protective face shield with crown
protector;
(ii) Safety glasses for
use under face shield (to meet required impact resistance test of ANSI
Z87.1);
(iii) Impact resistant,
long-sleeved jacket of a length adequate to protect vital organs; and
(iv) Impact resistant gloves.
(c) A bulb subject to disposal
should be removed with the regular, proper precautions, carefully placed in its
protective jacket or cover and deliberately broken by dropping from a
sufficient height. You must never dispose of an unbroken bulb as regular
garbage or trash.
(d) You must
handle bulbs only at room temperature. If they have been in operation, you must
allow adequate time (at least ten minutes) for the bulb to cool to room
temperature before handling.