R-1 — لوائح التركيبات الكهربائية
9 معدات كهربائية أخرى
الصفحة 38 في الوثيقة الأصلية
عرض PDFمعدات خاصة — سخان 905، مصعد 910، مسبح 915
SECTION 9
OTHER ELECTRICAL EQUIPMENT
900 DOMESTIC APPLIANCES
900-1 All domestic appliances such as electric kettles, toasters, mixers, refrigerators, freezers, washing
machines, etc., shall be adequately rated for the correct electrical supply conditions.
900-2 All domestic appliances shall be provided with a totally enclosed and fully shrouded terminal box
which shall include a substantial earth terminal.
900-3 All domestic appliances shall be connected to the electrical supply by means of plugs and sockets or
by means of junction boxes and isolators depending upon the location of the appliances.
900-4 Flexible cables employed for the purposes of connecting domestic appliances shall be fully suitable
for the purpose, of sample rating and provided with an earth conductor. All flexible cables shall being
accordance with Clause 705 of this regulation.
900-5 All domestic appliances shall in addition to excess current protection be provided with automatic earth
leakage protection that will trip the circuit in the event of a leakage current in excess of 30 milli amperes.
900-6 The non-current carrying metal work of all domestic appliances shall be securely connected to the
earthing system.
905 ELECTRIC STORAGE WATER HEATERS & ELECTRODE BOILERS
905-1 Electric storage type water heaters shall generally be either of the vented type and open to the
atmosphere so that under no condition of use can the pressure at the surface of the water be other than
atmospheric or of the cistern type in which the feed cistern is an integral part of the appliance or a separate part
located immediately above the water heater. Where the cistern is separate the water heater shall be provided
with event so arranged that any expanded water can return to the cistern. All water heaters shall be provided
with thermostats to control and prevent dangerous rise in temperature.
NOTES: 1. Storage type water heaters are recommended when an elevated water tank is available at normal location
on roof and the vent pipe can be easily installed.
3. Cistern type of water heathers are recommended when a high level tank is provided and vent pipes
Cannot be easily installed.
905-2 Pressure type storage water heaters may be installed in particular locations where the vented type or
cistern type water heaters are not practicable. Pressure type water heaters shall be provided with adequate
safety devices in order to ensure that any pressure buildup within the heater which is in excess of the safe
working pressure of the heater is immediately and effectively released. All pressure type water heaters shall in
addition to safety valves and control thermostat shall also be fitted with high limit safety thermostat to cut off
the power supply in case of the control thermostat does not function.
905-3 Storage water heaters upto3 KW may be connected to the single phase and neutral supply. Storage
water heaters over 3 KW shall be suitable for connection to the three phases.
905-4 All storage water heaters shall be connected to the earthing system in accordance with Section 6 and
shall additionally be protected by a current operate dearth leakage circuit breaker having a trip rating not
exceeding 30 milliamps.
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905-5 Electrode boilers having two or more electrodes may be employed in large premises, hospitals,
industries, etc. The electrical supply to electrode boilers shall be controlled by a circuit breaker of the multi
pole linked type and arranged to disconnect the supply from all electrodes simultaneou sly. The circuit breaker
shall also be provided with excess current protection in each conductor feeding an electrode.
905-6 The earthing of the electrode boiler shall comply with the requirements of section 6. Additionally all
armouring of cables, if any, shall also be connected to the shell of the boiler. The circuit feeding the boiler
shall be provided with a current operated earth leakage circuit breaker having a trip rating of 300/500
milliamps.
NOTES: l . Where in some special cases it is also required to connect the neutral conductor to the shell of the
boiler, the Ministry of Electricity &Water's prior approval shall be obtained before effecting such a
connection .
2 . In special situations w here a 300/500 milliamp trip rating will cause nuisance tripping a higher trip
current may be permitted, but this should be approved by M.E.W .
905-7 Where an electrode boiler is to be connected to a supply exceeding low voltage, then the method of
connection shall be submitted to MEW for their prior approval.
910 ELEVATORS AND ESCALATORS:
910-1 All elevators, and escalators shall be provided with a separate means of isolating the entire
electrical supply to the equipment.
910-2 On single and multicar installations where a separate power is used for signals or lights or any other
equipment common to the group, a separate means of isolating the electrical supply to such devices shall be
provided.
910-3 Where interconnec tions betwee n control pane ls are necessary for operation o f the system on
multicar installations that remain energized from a source o t h e r than the isolating means. a warning sign
shall be mounted on or adja cent roth isolating means. The sign shall e clearly legible and shall read
"Warning- Parts of the control panel are not de-energized by this switch".
910-4 All isolators shall be located in a readily accessible location. Where practicable the isolators shall be
located adjacent to the door of the machine room or enclosure .
910-5 Electrical elevators driven by poly phase alternating current machine motors shall be provided with a
means to prevent starting of the elevator motor when: (I) the phase rotation is in the wrong direction. or (2)
there is a failure in any phase.
910-6 Elevator, escalator driving machines. motor -generator sets, controllers, a military control
equipment and isolators shall be installed in a room or enclosure set aside for that purpose. The room or
enclosure shall be secured against unauthorized access.
910-7 Sufficient clear working space shall be provided around control panels to provide safe and
convenient access to all live parts of the equipment necessary for maintenance and adjustment.
910-8 In public buildings and other premises it is recommended that a Fireman's break glass type switch or
similar device be installed to override all operating controls and bring al l the elevators to the ground f loor
during an emergency .
910-9 Adequate illumination shall be provided in the vicinity of the lift machinery room . Self -contained
emergency lig hts C apable of providin g illumination for a period of 3 hours from a battery source shall be
provided, such emergency lights shall be automa tically charged and shall be switched on automatically in th e
event of failure of supply. Alternatively, lights connected to a maintaine d/emergency source with automa tic
change over in the event of failure of normal supply shall be provided.
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915 UNDERWATER LIGHTING:
915-1 All circuits feeding underwat er lights shall be so designed and installed so that they ensure full safety
for personnel.
915-2 All underwater lighting circuits shall operate at voltage not exceeding 36 volts.
EXCEPTION: ln large decorative fountains, where adequate fencing and guarding is provided to ensure that only
competent persons can come in contact with the pool the normal system voltage may be
employed.
915-3 Lighting fixtures and all other equipme nt employed in the pool shall be of approved manufacture and
tested to ensure complete safety in operation.
915-4 All circuits feeding pool lights shall be protected by a current operated earth leakage circuit breaker
having a trip rating of 10 milliamps. Also other equip ment associated with the under water lights viz. pumps
etc., shall be protected by a current operated earth leakage circuit breaker having a trip rating of 300/500
milliamps.
915-5 All electrical equipment, lighting fittings, transformers and accessories shall be connected securely to
the earthing system.
915-6 All metallic parts of the pool structure, including the reinforcing steel, all forming shells, all metal
fittings within or attached to the pool structure and all met al parts of electric equipment shall be bonded
together.
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OTHER ELECTRICAL EQUIPMENT
900 DOMESTIC APPLIANCES
900-1 All domestic appliances such as electric kettles, toasters, mixers, refrigerators, freezers, washing
machines, etc., shall be adequately rated for the correct electrical supply conditions.
900-2 All domestic appliances shall be provided with a totally enclosed and fully shrouded terminal box
which shall include a substantial earth terminal.
900-3 All domestic appliances shall be connected to the electrical supply by means of plugs and sockets or
by means of junction boxes and isolators depending upon the location of the appliances.
900-4 Flexible cables employed for the purposes of connecting domestic appliances shall be fully suitable
for the purpose, of sample rating and provided with an earth conductor. All flexible cables shall being
accordance with Clause 705 of this regulation.
900-5 All domestic appliances shall in addition to excess current protection be provided with automatic earth
leakage protection that will trip the circuit in the event of a leakage current in excess of 30 milli amperes.
900-6 The non-current carrying metal work of all domestic appliances shall be securely connected to the
earthing system.
905 ELECTRIC STORAGE WATER HEATERS & ELECTRODE BOILERS
905-1 Electric storage type water heaters shall generally be either of the vented type and open to the
atmosphere so that under no condition of use can the pressure at the surface of the water be other than
atmospheric or of the cistern type in which the feed cistern is an integral part of the appliance or a separate part
located immediately above the water heater. Where the cistern is separate the water heater shall be provided
with event so arranged that any expanded water can return to the cistern. All water heaters shall be provided
with thermostats to control and prevent dangerous rise in temperature.
NOTES: 1. Storage type water heaters are recommended when an elevated water tank is available at normal location
on roof and the vent pipe can be easily installed.
3. Cistern type of water heathers are recommended when a high level tank is provided and vent pipes
Cannot be easily installed.
905-2 Pressure type storage water heaters may be installed in particular locations where the vented type or
cistern type water heaters are not practicable. Pressure type water heaters shall be provided with adequate
safety devices in order to ensure that any pressure buildup within the heater which is in excess of the safe
working pressure of the heater is immediately and effectively released. All pressure type water heaters shall in
addition to safety valves and control thermostat shall also be fitted with high limit safety thermostat to cut off
the power supply in case of the control thermostat does not function.
905-3 Storage water heaters upto3 KW may be connected to the single phase and neutral supply. Storage
water heaters over 3 KW shall be suitable for connection to the three phases.
905-4 All storage water heaters shall be connected to the earthing system in accordance with Section 6 and
shall additionally be protected by a current operate dearth leakage circuit breaker having a trip rating not
exceeding 30 milliamps.
38
905-5 Electrode boilers having two or more electrodes may be employed in large premises, hospitals,
industries, etc. The electrical supply to electrode boilers shall be controlled by a circuit breaker of the multi
pole linked type and arranged to disconnect the supply from all electrodes simultaneou sly. The circuit breaker
shall also be provided with excess current protection in each conductor feeding an electrode.
905-6 The earthing of the electrode boiler shall comply with the requirements of section 6. Additionally all
armouring of cables, if any, shall also be connected to the shell of the boiler. The circuit feeding the boiler
shall be provided with a current operated earth leakage circuit breaker having a trip rating of 300/500
milliamps.
NOTES: l . Where in some special cases it is also required to connect the neutral conductor to the shell of the
boiler, the Ministry of Electricity &Water's prior approval shall be obtained before effecting such a
connection .
2 . In special situations w here a 300/500 milliamp trip rating will cause nuisance tripping a higher trip
current may be permitted, but this should be approved by M.E.W .
905-7 Where an electrode boiler is to be connected to a supply exceeding low voltage, then the method of
connection shall be submitted to MEW for their prior approval.
910 ELEVATORS AND ESCALATORS:
910-1 All elevators, and escalators shall be provided with a separate means of isolating the entire
electrical supply to the equipment.
910-2 On single and multicar installations where a separate power is used for signals or lights or any other
equipment common to the group, a separate means of isolating the electrical supply to such devices shall be
provided.
910-3 Where interconnec tions betwee n control pane ls are necessary for operation o f the system on
multicar installations that remain energized from a source o t h e r than the isolating means. a warning sign
shall be mounted on or adja cent roth isolating means. The sign shall e clearly legible and shall read
"Warning- Parts of the control panel are not de-energized by this switch".
910-4 All isolators shall be located in a readily accessible location. Where practicable the isolators shall be
located adjacent to the door of the machine room or enclosure .
910-5 Electrical elevators driven by poly phase alternating current machine motors shall be provided with a
means to prevent starting of the elevator motor when: (I) the phase rotation is in the wrong direction. or (2)
there is a failure in any phase.
910-6 Elevator, escalator driving machines. motor -generator sets, controllers, a military control
equipment and isolators shall be installed in a room or enclosure set aside for that purpose. The room or
enclosure shall be secured against unauthorized access.
910-7 Sufficient clear working space shall be provided around control panels to provide safe and
convenient access to all live parts of the equipment necessary for maintenance and adjustment.
910-8 In public buildings and other premises it is recommended that a Fireman's break glass type switch or
similar device be installed to override all operating controls and bring al l the elevators to the ground f loor
during an emergency .
910-9 Adequate illumination shall be provided in the vicinity of the lift machinery room . Self -contained
emergency lig hts C apable of providin g illumination for a period of 3 hours from a battery source shall be
provided, such emergency lights shall be automa tically charged and shall be switched on automatically in th e
event of failure of supply. Alternatively, lights connected to a maintaine d/emergency source with automa tic
change over in the event of failure of normal supply shall be provided.
39
915 UNDERWATER LIGHTING:
915-1 All circuits feeding underwat er lights shall be so designed and installed so that they ensure full safety
for personnel.
915-2 All underwater lighting circuits shall operate at voltage not exceeding 36 volts.
EXCEPTION: ln large decorative fountains, where adequate fencing and guarding is provided to ensure that only
competent persons can come in contact with the pool the normal system voltage may be
employed.
915-3 Lighting fixtures and all other equipme nt employed in the pool shall be of approved manufacture and
tested to ensure complete safety in operation.
915-4 All circuits feeding pool lights shall be protected by a current operated earth leakage circuit breaker
having a trip rating of 10 milliamps. Also other equip ment associated with the under water lights viz. pumps
etc., shall be protected by a current operated earth leakage circuit breaker having a trip rating of 300/500
milliamps.
915-5 All electrical equipment, lighting fittings, transformers and accessories shall be connected securely to
the earthing system.
915-6 All metallic parts of the pool structure, including the reinforcing steel, all forming shells, all metal
fittings within or attached to the pool structure and all met al parts of electric equipment shall be bonded
together.
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