R-1 — لوائح التركيبات الكهربائية
5 حماية التيار الزائد
الصفحة 19 في الوثيقة الأصلية
عرض PDF5 Hand decorating, wrapping, packing 500
Switch rooms (metal clad and cubicle switchgear) 150
CLOTHING FACTORIES:
Matching-up 750
Cutting 750
Sewing 1000
Pressing 500
84
AREA LUX AREA LUX
ENGRAVING SHOPS: Upholstery:
Hand 1500 Cloth inspection 1500
Machine. General 500 Filling covering 500
Fine 1500 Slipping 750
Cutting, sewing 750
FARM BUILDINGS:
General purpose building 30 Mattress making:
floors 300 Assembly 500
General purpose buildings ( windowless) 50 Tape edging 1000
Farm workshops: Tool Rooms:
General 100 General 500
Workbench or machine 300 Benches 750
Production Inspection 500
Milk premises (handling and storing) 100 Spray Booths:
Sick animal pens, calf nurseries 50 Colour finishing 500
Yards 20 Clear finishing 300
FIRE STATIONS: GARAGES:
Appliance rooms 300 External apron:
External aprons 30 General 50
Pumps 300
FLOUR MILLS: Parking areas (interior) 30
Roller, purifier. Silks and packing 300 General repair, servicing, greasing, pits, washing,
polishing workbench
500
Wetting tables 500
FORGES: GAS WORK:
General 300 Exterior walkways and platform 50
Exterior stairs and ladders 100
FOUNDRIES: Retort houses, oil gas plants, water gas plants,
purifiers
100
Charging floors, tumbling, cleaning, pouring,
shaking out.
300
Rough core making 300 Governor, meter, compressor, booster and
exhauster houses
150
Fine molding, core making, inspection 500
HOSIERY AND KNITWEAR FACTORIES:
FURNITURE FACTORIES:
Raw material store 100 Flat bled knitting machines 500
Furnished good store 150 Circular knitting machines 750
Lock stitch and over locking machines 1000
Wood machining and assembly: Linking or running on 1000
Rough sawing and cutting 300 Mending 1500
Machining. Sanding and assembly of
components
500 Examination, hand finishing 1500
INSPECTION AND TESTING SHOPS (ENGINEERING)
Cabinet making:
Veneer sorting and preparation 1000 Rough work. e.g. counting 300
Veneer pressing 500 Medium work. e.g. "Go" and "No-go" gauges, sub-
assemblies
500
Components stores 150 Fine work. e.g. telecommunications equipment
calibrated scales. Precision mechanism
instruments
1000
Fitting . final inspection 750
Very fine work. e.g. gauging and inspection of
small intricate parts
1500
85
AREA LUX AREA LUX
Minute work. e.g. very small instruments 3000 PAINT SHOPS AND SPRAY BOOTHS:
JEWELLERY AND WATCH-MAKING FACTORIES: Dipping, firing, rough spraying 300
Rubbing, ordinary painting, spraying and finishing 500
General 500 Fine painting, spraying and finishing 750
Fine processes 1000 Retouching and matching 1000
Minute processes 3000
Gem cutting. Polishing, setting 1500 PHARMACEUTICALS AND FINE CHEMICAL
WORKS:
LABORATORIES (GENERAL):
General 750 Pharmaceuticals manufacture:
LAUNDRIES AND DRY CLEANING WORKS Grinding
Granulating, mixing and drying, tableting,
sterilizing and washing, preparations of solution
and filling, labeling, capping, cartooning, wrapping
500
Receiving, sorting, washing, drying, ironing
calendaring dispatch, dry cleaning, bulk machine
work
300
Hand ironing, pressing, inspection mending,
spotting
500
Fine chemical manufacture plant processing 300
LEATHER:
General 300 Fine chemical finishing 500
Pressing, glazing cutting, strafing, sewing 100 Raw materials stores 200
Inspection 750
Grading, matching 1500 PLASTIC WORK:
Manufacture of plastic raw materials Plastic
processing, Calendaring, extrusion, injection.
Compression and blow moulding, sheet
fabrication, shaping, machining, trimming,
polishing cementing
500
MACHINE AND FITTING SHOPS:
Casual work 200
Rough bench and machine work 300
Medium bench and machine work, ordinary
automatic machine, rough grinding, medium
buffing, polishing
500
PLATING SHOPS:
Fine bench and machine work, fine automatic
machine , medium grinding machine, fine
butting and polishing
1000 Vats and baths 300
Buffing, polishing, burnishing 500
Final buffing and polishing 750
MILK & OTHER BOTTLING PLANTS: POTTERIES:
General work areas 300 Grinding, filter pressing, kiln room, molding,
pressing, cleaning,.trimming, glazing, firing
300
Bottle filling 750
Bottle inspection
Enameling, coloring, decorating 750
MOTOR VEHICLE PLANTS:
General sub-assemblies, chassis assembly, car
assembly, body sub-assemblies, body assembly
500 PRINTING WORKS:
Type foundries:
Matrix making, dressing type, hand and machine
casting
300
Final inspection 750
PAINT WORK: Font assembly, sorting 750
Automatic processes 200 Composing rooms:
General 300 Hand composing, Imposing, imposition and
distribution
750
Special batch mixing 750
Colour matching 1000 Machine composition - key board 750
Machine composition - casting 300
86
AREA LUX AREA LUX
Proof Presses 750 Machines 300
Proof reading 750 Edible product processing and packing 300
Illuminated table - General lighting 300
Printing machine room presses 500
Pre make-ready 500 STRUCTURAL STEEL FABRICATION PLANTS:
Graphic reproduction:
General 500 General 300
Precision proofing, retouching, etching 1000 Marking off 500
Colour reproduction and printing inspection
colour and registration
1500
WAREHOUSE AND BULK STORE:
Large material, loading bays 150
RUBBER PROCESSING: Small material, racks 300
FACTORIES: Packing, despatch 300
Fabric preparation creels, dipping, molding,
compounding, calendaring
300 Issue counters 500
Tyre and tube making 500 WELDING AND SOLDERING SHOPS:
SHEET METAL WORKS:
Bench work, scribing, inspection 750 Gas and arc welding, rough spot welding 300
Pressing, punching, shearing, stamping, spinning,
folding
500
Medium soldering, brazing, spot welding, e.g.
domestic hardware
500
Fine soldering, spot welding, e.g. instruments 1000
Very fine soldering spot welding, e.g. electronics 1500
SLAUGHTER HOUSES:
General 500 WOODWORKING SHOPS:
Inspection 750 Rough sawing bench work sizing, planning, rough
sanding, medium machine and bench work
gluing, cooperage
500
SOAP FACTORIES:
General areas 300
Automatic processes 200 Fine bench and machine work fine sanding,
finishing
750
Control panels 300
87
AREA LUX AREA LUX
MULTI-PURPOSE SPORTS HALLS: GYMNASIA:
Athletics. Basketball, bowls, fencing, gymnastics,
judo, volley ball
300 to 700 General 500
ICE HOCKY AND SKATING (INDOOR RINKS):
BADMINTON:
National and international 300 National and international 750
Club 200 Club 500
Recreational 150 Recreational 300
BILLIARD AND SNOOKER: LAWN TENNIS (INDOOR COURTS):
National and international 500 National and international 750
Club 300 Club 500
Recreational 150 Recreational 300
BOXING:
National and international 2000 RIFLE AND PISTOL SHOOTING:
Club 1000 Firing zone 300
Recreational 300 Range 150
SQASH RACKETS: TABLE TENNIS
National and international 500 National and international playing area 500
Club 300
Recreational 300 Spectator area 150
Club playing area 300
SWIMMING: Recreational playing area 150 - 300
National and international pool 500
Spectator area 100
Club and recreational pool 300 GENERAL:
Spectator area 100 Changing rooms, showers, locker rooms 150
Training pool 300
NOTE – Higher illumination will be required if events are televised in colour.
88
89
90
91
APPENDIX 5
Testing of PVC insulated single core non-armoured
electrical cables before installation
Before starting the installation of cables, the following tests shall be carried out:
ELECTRICAL TEST REQUIREMENTS:
Test shall be made with alternating voltage of approximately sine-wave form, having a frequency in the range 50 Hz to
60 Hz, and of r.m.s. values as given in table 5.2. The required elec. tests to be applied at the cable shall be of time and
temp. as shown in table 5.2. The tests are :-
a) Conductor resistance of 20°C (Ω/Km)
b) Voltage test on complete able (No breakdown of the insulation shall occur during the test).
c) Insulation resistance at 70°C must have the minimum values as shown in table – 5.1
d) Resistance of insulation to d.c. (the exterior of insulation shall show no damage)
TABLE 5.1
Nominal cross-
sectional area of
conductor
Number &
diameter of wires
per conductor
Maximum conductor
resistance - plain
annealed copper
Km
Radial thickness
of insulation
Mean overall
diameter
(upper limit)
Minimum
insulation
resistance at
70°C
mm² No./mm Ω/Km mm mm M Ω/Km
1.5 1/3.38 12.1 0.7 3.3 0.011
1.5 7/0.50 12.1 0.7 3.4 0.010
2.5 1/1.78 7.41 0.8 3.9 0.010
2.5 7/0.67 7.41 0.8 4.2 0.009
4 7/0.85 4.61 0.8 4.8 0.0077
6 7/1.04 3.08 0.8 5.4 0.0065
10 7/1.35 1.83 1 6.8 0.0065
16 7/1.7 1.15 1 8 0.0050
25 7/2.14 0.727 1.2 9.8 0.0050
35 19/1.53 0.524 1.2 11 0.0040
50 19/1.78 0.387 1.4 13 0.0045
70 19/2.14 0.268 1.4 15 0.0035
95 19/2.52 0.193 1.6 17 0.0035
120 37/2.03 0.153 1.6 19 0.0032
37/2.25 0.124 1.8 21 0.0032
185 37/2.52 0.0991 2 23.5 0.0032
240 61/2.26 0.0754 2.2 26.5 0.0032
300 61/2.52 0.0601 2.4 29.5 0.0030
400 61/2.85 0.0470 2.6 33.5 0.0028
500 61/3.2 0.0366 2.8 37 0.0028
630 27/2.52 0.0283 2.8 41 0.0025
92
TABLE 5.2
ELECTRICAL TESTS TO BE APPLIED
Test Unit Test Requirement
Voltage test on complete cable :
Length of sample (minimum) Meter 20 No Break-down of the
insulation
Period of immersion (minimum) Hours 24
Temperature of Water °C 20±5
Applied voltage (A.C) V. 2500
Time of Application Mins. 15
Conductor resistance at 20°C.:
Length of sample Meter 1
Not more than the
Maximum value shown in
Table 1.
Insulation resistance :
Length of sample Meter 5
Not less than the minimum
value
Shown in Table 1.
Period of Immersion (minimum)
Temperture as water
Hours
°C
2
70±2
Resistance of insulation to D.C.
Length of sample Meter 5 No damage at the insulation
Period of Immersion Days 10
Temperature of solution °C 60±5
Duration of applied voltage Days 10
Test voltage Volts D.C 220
93
TABLE 5.3
PHYSICAL TEST REQUIREMENTS
The insulation shall be subjected to the tests and methods as detailed table 5.3
Test Method Property Under Test Test Requirements
A,B Minimum tensile strength (N/mm²) Minimum
elongation at break (%)
12.5 mm²
125%
C1, C2 Cold bent test : Temperature at which specimen shall not
crack (°C) -15±2°C
E3 Less of mass after ageing 10 days at 115±2°C (Max.)
(mg/cm²) 1.5 mg/cm²
E1
Number of days ageing
Ageing temperature (°C)
Tensile strength after ageing (Min. value N/mm²)
Maximum variation from unaged value (%)
Elongation at break after ageing – minimum value %
Max. variation from unaged value %
10
135±2°C
12.5 N/mm²
25%
125%
25 %
F1, F2 Hot pressure test temperature (°C) 95±2°C
F3 Maximum deformation % 50%
G1, G2 Heat shock test:
Temperature at which specimen shall not crack (°C) 150±2°C
H Minimum insulation resistance constant
(K value ) at 20 °C (M/Km)
180 M/km.
TEST CERTIFICATE SHALL BE APPROVED BY M.E.W.
94
Switch rooms (metal clad and cubicle switchgear) 150
CLOTHING FACTORIES:
Matching-up 750
Cutting 750
Sewing 1000
Pressing 500
84
AREA LUX AREA LUX
ENGRAVING SHOPS: Upholstery:
Hand 1500 Cloth inspection 1500
Machine. General 500 Filling covering 500
Fine 1500 Slipping 750
Cutting, sewing 750
FARM BUILDINGS:
General purpose building 30 Mattress making:
floors 300 Assembly 500
General purpose buildings ( windowless) 50 Tape edging 1000
Farm workshops: Tool Rooms:
General 100 General 500
Workbench or machine 300 Benches 750
Production Inspection 500
Milk premises (handling and storing) 100 Spray Booths:
Sick animal pens, calf nurseries 50 Colour finishing 500
Yards 20 Clear finishing 300
FIRE STATIONS: GARAGES:
Appliance rooms 300 External apron:
External aprons 30 General 50
Pumps 300
FLOUR MILLS: Parking areas (interior) 30
Roller, purifier. Silks and packing 300 General repair, servicing, greasing, pits, washing,
polishing workbench
500
Wetting tables 500
FORGES: GAS WORK:
General 300 Exterior walkways and platform 50
Exterior stairs and ladders 100
FOUNDRIES: Retort houses, oil gas plants, water gas plants,
purifiers
100
Charging floors, tumbling, cleaning, pouring,
shaking out.
300
Rough core making 300 Governor, meter, compressor, booster and
exhauster houses
150
Fine molding, core making, inspection 500
HOSIERY AND KNITWEAR FACTORIES:
FURNITURE FACTORIES:
Raw material store 100 Flat bled knitting machines 500
Furnished good store 150 Circular knitting machines 750
Lock stitch and over locking machines 1000
Wood machining and assembly: Linking or running on 1000
Rough sawing and cutting 300 Mending 1500
Machining. Sanding and assembly of
components
500 Examination, hand finishing 1500
INSPECTION AND TESTING SHOPS (ENGINEERING)
Cabinet making:
Veneer sorting and preparation 1000 Rough work. e.g. counting 300
Veneer pressing 500 Medium work. e.g. "Go" and "No-go" gauges, sub-
assemblies
500
Components stores 150 Fine work. e.g. telecommunications equipment
calibrated scales. Precision mechanism
instruments
1000
Fitting . final inspection 750
Very fine work. e.g. gauging and inspection of
small intricate parts
1500
85
AREA LUX AREA LUX
Minute work. e.g. very small instruments 3000 PAINT SHOPS AND SPRAY BOOTHS:
JEWELLERY AND WATCH-MAKING FACTORIES: Dipping, firing, rough spraying 300
Rubbing, ordinary painting, spraying and finishing 500
General 500 Fine painting, spraying and finishing 750
Fine processes 1000 Retouching and matching 1000
Minute processes 3000
Gem cutting. Polishing, setting 1500 PHARMACEUTICALS AND FINE CHEMICAL
WORKS:
LABORATORIES (GENERAL):
General 750 Pharmaceuticals manufacture:
LAUNDRIES AND DRY CLEANING WORKS Grinding
Granulating, mixing and drying, tableting,
sterilizing and washing, preparations of solution
and filling, labeling, capping, cartooning, wrapping
500
Receiving, sorting, washing, drying, ironing
calendaring dispatch, dry cleaning, bulk machine
work
300
Hand ironing, pressing, inspection mending,
spotting
500
Fine chemical manufacture plant processing 300
LEATHER:
General 300 Fine chemical finishing 500
Pressing, glazing cutting, strafing, sewing 100 Raw materials stores 200
Inspection 750
Grading, matching 1500 PLASTIC WORK:
Manufacture of plastic raw materials Plastic
processing, Calendaring, extrusion, injection.
Compression and blow moulding, sheet
fabrication, shaping, machining, trimming,
polishing cementing
500
MACHINE AND FITTING SHOPS:
Casual work 200
Rough bench and machine work 300
Medium bench and machine work, ordinary
automatic machine, rough grinding, medium
buffing, polishing
500
PLATING SHOPS:
Fine bench and machine work, fine automatic
machine , medium grinding machine, fine
butting and polishing
1000 Vats and baths 300
Buffing, polishing, burnishing 500
Final buffing and polishing 750
MILK & OTHER BOTTLING PLANTS: POTTERIES:
General work areas 300 Grinding, filter pressing, kiln room, molding,
pressing, cleaning,.trimming, glazing, firing
300
Bottle filling 750
Bottle inspection
Enameling, coloring, decorating 750
MOTOR VEHICLE PLANTS:
General sub-assemblies, chassis assembly, car
assembly, body sub-assemblies, body assembly
500 PRINTING WORKS:
Type foundries:
Matrix making, dressing type, hand and machine
casting
300
Final inspection 750
PAINT WORK: Font assembly, sorting 750
Automatic processes 200 Composing rooms:
General 300 Hand composing, Imposing, imposition and
distribution
750
Special batch mixing 750
Colour matching 1000 Machine composition - key board 750
Machine composition - casting 300
86
AREA LUX AREA LUX
Proof Presses 750 Machines 300
Proof reading 750 Edible product processing and packing 300
Illuminated table - General lighting 300
Printing machine room presses 500
Pre make-ready 500 STRUCTURAL STEEL FABRICATION PLANTS:
Graphic reproduction:
General 500 General 300
Precision proofing, retouching, etching 1000 Marking off 500
Colour reproduction and printing inspection
colour and registration
1500
WAREHOUSE AND BULK STORE:
Large material, loading bays 150
RUBBER PROCESSING: Small material, racks 300
FACTORIES: Packing, despatch 300
Fabric preparation creels, dipping, molding,
compounding, calendaring
300 Issue counters 500
Tyre and tube making 500 WELDING AND SOLDERING SHOPS:
SHEET METAL WORKS:
Bench work, scribing, inspection 750 Gas and arc welding, rough spot welding 300
Pressing, punching, shearing, stamping, spinning,
folding
500
Medium soldering, brazing, spot welding, e.g.
domestic hardware
500
Fine soldering, spot welding, e.g. instruments 1000
Very fine soldering spot welding, e.g. electronics 1500
SLAUGHTER HOUSES:
General 500 WOODWORKING SHOPS:
Inspection 750 Rough sawing bench work sizing, planning, rough
sanding, medium machine and bench work
gluing, cooperage
500
SOAP FACTORIES:
General areas 300
Automatic processes 200 Fine bench and machine work fine sanding,
finishing
750
Control panels 300
87
AREA LUX AREA LUX
MULTI-PURPOSE SPORTS HALLS: GYMNASIA:
Athletics. Basketball, bowls, fencing, gymnastics,
judo, volley ball
300 to 700 General 500
ICE HOCKY AND SKATING (INDOOR RINKS):
BADMINTON:
National and international 300 National and international 750
Club 200 Club 500
Recreational 150 Recreational 300
BILLIARD AND SNOOKER: LAWN TENNIS (INDOOR COURTS):
National and international 500 National and international 750
Club 300 Club 500
Recreational 150 Recreational 300
BOXING:
National and international 2000 RIFLE AND PISTOL SHOOTING:
Club 1000 Firing zone 300
Recreational 300 Range 150
SQASH RACKETS: TABLE TENNIS
National and international 500 National and international playing area 500
Club 300
Recreational 300 Spectator area 150
Club playing area 300
SWIMMING: Recreational playing area 150 - 300
National and international pool 500
Spectator area 100
Club and recreational pool 300 GENERAL:
Spectator area 100 Changing rooms, showers, locker rooms 150
Training pool 300
NOTE – Higher illumination will be required if events are televised in colour.
88
89
90
91
APPENDIX 5
Testing of PVC insulated single core non-armoured
electrical cables before installation
Before starting the installation of cables, the following tests shall be carried out:
ELECTRICAL TEST REQUIREMENTS:
Test shall be made with alternating voltage of approximately sine-wave form, having a frequency in the range 50 Hz to
60 Hz, and of r.m.s. values as given in table 5.2. The required elec. tests to be applied at the cable shall be of time and
temp. as shown in table 5.2. The tests are :-
a) Conductor resistance of 20°C (Ω/Km)
b) Voltage test on complete able (No breakdown of the insulation shall occur during the test).
c) Insulation resistance at 70°C must have the minimum values as shown in table – 5.1
d) Resistance of insulation to d.c. (the exterior of insulation shall show no damage)
TABLE 5.1
Nominal cross-
sectional area of
conductor
Number &
diameter of wires
per conductor
Maximum conductor
resistance - plain
annealed copper
Km
Radial thickness
of insulation
Mean overall
diameter
(upper limit)
Minimum
insulation
resistance at
70°C
mm² No./mm Ω/Km mm mm M Ω/Km
1.5 1/3.38 12.1 0.7 3.3 0.011
1.5 7/0.50 12.1 0.7 3.4 0.010
2.5 1/1.78 7.41 0.8 3.9 0.010
2.5 7/0.67 7.41 0.8 4.2 0.009
4 7/0.85 4.61 0.8 4.8 0.0077
6 7/1.04 3.08 0.8 5.4 0.0065
10 7/1.35 1.83 1 6.8 0.0065
16 7/1.7 1.15 1 8 0.0050
25 7/2.14 0.727 1.2 9.8 0.0050
35 19/1.53 0.524 1.2 11 0.0040
50 19/1.78 0.387 1.4 13 0.0045
70 19/2.14 0.268 1.4 15 0.0035
95 19/2.52 0.193 1.6 17 0.0035
120 37/2.03 0.153 1.6 19 0.0032
37/2.25 0.124 1.8 21 0.0032
185 37/2.52 0.0991 2 23.5 0.0032
240 61/2.26 0.0754 2.2 26.5 0.0032
300 61/2.52 0.0601 2.4 29.5 0.0030
400 61/2.85 0.0470 2.6 33.5 0.0028
500 61/3.2 0.0366 2.8 37 0.0028
630 27/2.52 0.0283 2.8 41 0.0025
92
TABLE 5.2
ELECTRICAL TESTS TO BE APPLIED
Test Unit Test Requirement
Voltage test on complete cable :
Length of sample (minimum) Meter 20 No Break-down of the
insulation
Period of immersion (minimum) Hours 24
Temperature of Water °C 20±5
Applied voltage (A.C) V. 2500
Time of Application Mins. 15
Conductor resistance at 20°C.:
Length of sample Meter 1
Not more than the
Maximum value shown in
Table 1.
Insulation resistance :
Length of sample Meter 5
Not less than the minimum
value
Shown in Table 1.
Period of Immersion (minimum)
Temperture as water
Hours
°C
2
70±2
Resistance of insulation to D.C.
Length of sample Meter 5 No damage at the insulation
Period of Immersion Days 10
Temperature of solution °C 60±5
Duration of applied voltage Days 10
Test voltage Volts D.C 220
93
TABLE 5.3
PHYSICAL TEST REQUIREMENTS
The insulation shall be subjected to the tests and methods as detailed table 5.3
Test Method Property Under Test Test Requirements
A,B Minimum tensile strength (N/mm²) Minimum
elongation at break (%)
12.5 mm²
125%
C1, C2 Cold bent test : Temperature at which specimen shall not
crack (°C) -15±2°C
E3 Less of mass after ageing 10 days at 115±2°C (Max.)
(mg/cm²) 1.5 mg/cm²
E1
Number of days ageing
Ageing temperature (°C)
Tensile strength after ageing (Min. value N/mm²)
Maximum variation from unaged value (%)
Elongation at break after ageing – minimum value %
Max. variation from unaged value %
10
135±2°C
12.5 N/mm²
25%
125%
25 %
F1, F2 Hot pressure test temperature (°C) 95±2°C
F3 Maximum deformation % 50%
G1, G2 Heat shock test:
Temperature at which specimen shall not crack (°C) 150±2°C
H Minimum insulation resistance constant
(K value ) at 20 °C (M/Km)
180 M/km.
TEST CERTIFICATE SHALL BE APPROVED BY M.E.W.
94