ELECTRICAL LOAD WORKSHEET
PROPOSED
single storey residential building
OWNER :
Toshinori Yagi
ADDRESS:
sinsuat ave., cotabato city
LIGHTING LOAD PER ROOM
Room
bedroom
Total area of habitable living area : 3 m x 4m = 12 m2 @ 24 watts /m2
Number of Lamps
:
3
= 288 watts
@ 100 watts each = 300 watts
Lighting Load Subtotal = 300 watts
LIGHTING LOAD TOTAL = 300 watts
LOAD AMPACITY =
300 watts / 230 V = 1.304 AMPS
2.0 mm2 , TW Cu.WIRE
SIZE OF CONDUCTORS =
MINIMUM SIZE OF CIRCUIT BREAKER = 15 AT,
SIZE OF CONDUIT
Room
13 mm2 ,
=
DIA. PVC PIPE
master bedroom
Total area of habitable living area :
watts
Number of Lamps
:
5
4 m x 5m = 20 m2 @ 24 watts /m2
@ 100 watts each = 500 watts
Lighting Load Subtotal = 500 watts
LIGHTING LOAD TOTAL = 500 watts
LOAD AMPACITY =
500 watts / 230 V =2.173 AMPS
2.0 mm2 , TW Cu.WIRE
SIZE OF CONDUCTORS =
MINIMUM SIZE OF CIRCUIT BREAKER = 15 AT,
SIZE OF CONDUIT
=
13
mm2 ,
DIA. PVC PIPE
Page 1
= 480
ELECTRICAL LOAD WORKSHEET
LIGHTING LOAD PER ROOM
Room
living
Total area of habitable living area : 5 m x 5m = 25 m2 @ 24 watts /m2
Number of Lamps
:
6
= 600 watts
@ 100 watts each = 600 watts
Lighting Load Subtotal = 600 watts
LIGHTING LOAD TOTAL = 600 watts
LOAD AMPACITY =
600 watts / 230 V = 2.608 AMPS
2.0 mm2 , TW Cu.WIRE
SIZE OF CONDUCTORS =
MINIMUM SIZE OF CIRCUIT BREAKER = 15 AT,
SIZE OF CONDUIT
Room
=
13
mm2 ,
DIA. PVC PIPE
kitchen/ dining
Total area of habitable living area : 4 m x 4m = 20 m2 @ 24 watts /m2
Number of Lamps
:
5
@ 100 watts each = 500 watts
Lighting Load Subtotal = 500 watts
LIGHTING LOAD TOTAL = 500 watts
LOAD AMPACITY =
500 watts / 230 V =2.173 AMPS
2.0 mm2 , TW Cu.WIRE
SIZE OF CONDUCTORS =
MINIMUM SIZE OF CIRCUIT BREAKER = 15 AT,
SIZE OF CONDUIT
=
13
mm2 ,
DIA. PVC PIPE
Page 2
= 480 watts
ELECTRICAL LOAD WORKSHEET
Room
C.R.
Total area of habitable living area : 2 m x 3 m = 8 m2 @ 24 watts /m2
Number of Lamps
:
2
@ 100 watts each = 200 watts
Lighting Load Subtotal = 100 watts
LIGHTING LOAD TOTAL = 100 watts
LOAD AMPACITY = 200 watts / 230 V =0.869 AMPS
2.0 mm2 , TW Cu.WIRE
SIZE OF CONDUCTORS =
MINIMUM SIZE OF CIRCUIT BREAKER = 15 AT,
SIZE OF CONDUIT
=
13
mm2 ,
DIA. PVC PIPE
Page 3
= 144 watts
ELECTRICAL LOAD WORKSHEET
CONVENIENCE
Type of Convenience Outlet
OUTLET LOAD
[ USE 180 watts per outlet
]
Room _master bedroom
1.1 gang C.O.
2. 2 gang C.O.
3. 3 gang C.O.
- ____ sets X
- _2_ sets X
- _1_ sets X
1 X 180 W =__ ___watts
2 X 180 W =__720 watts
3 X 180 W =_540_watts
C.O.
LOAD AMPACITY =
Subtotal =__1260___watts
___1260__ watts / 230 V =____5.748____
AMPS
SIZE OF CONDUCTORS =_____3.5______mm2 , ___TW___ Cu.WIRE
MINIMUM SIZE OF CIRCUIT BREAKER =
SIZE OF CONDUIT
= __13____
mm2 ,
____20____AT,
DIA. PVC PIPE
Room _bedroom
1.1 gang C.O.
2. 2 gang C.O.
3. 3 gang C.O.
- ____ sets X
1 X 180 W =__ ___watts
- _2_ sets X
2 X 180 W =__720 watts
- __ sets X 3 X 180 W =______watts
C.O.
LOAD AMPACITY =
Subtotal =__720___watts
___720__ watts / 230 V =____3.130____
AMPS
SIZE OF CONDUCTORS =_____3.5______mm2 , ___TW___ Cu.WIRE
MINIMUM SIZE OF CIRCUIT BREAKER =
____20____AT,
mm2 ,
DIA. PVC PIPE
SIZE OF CONDUIT
=
__13____
Page 4
ELECTRICAL LOAD WORKSHEET
CONVENIENCE
Type of Convenience Outlet
OUTLET LOAD
[ USE 180 watts per outlet
]
Room _kitchen/dining
1.1 gang C.O.
2. 2 gang C.O.
3. 3 gang C.O.
- ____ sets X
1 X 180 W =__ ___watts
- _3_ sets X
2 X 180 W =__1080
watts
- __ sets X 3 X 180 W =__watts
C.O.
LOAD AMPACITY =
Subtotal =_1080__watts
___1080__ watts / 230 V =____4.695____
AMPS
SIZE OF CONDUCTORS =_____3.5______mm2 , ___TW___ Cu.WIRE
MINIMUM SIZE OF CIRCUIT BREAKER =
SIZE OF CONDUIT
= __13____
mm2 ,
____20____AT,
DIA. PVC PIPE
Room _living
1.1 gang C.O.
2. 2 gang C.O.
3. 3 gang C.O.
- ____ sets X
1 X 180 W =__ ___watts
- _2_ sets X
2 X 180 W =__720 watts
- __ sets X 3 X 180 W =______watts
C.O.
LOAD AMPACITY =
Subtotal =__720___watts
___720__ watts / 230 V =____3.130____
AMPS
SIZE OF CONDUCTORS =_____3.5______mm2 , ___TW___ Cu.WIRE
MINIMUM SIZE OF CIRCUIT BREAKER =
SIZE OF CONDUIT
= __13____
mm2 ,
Page 5
____20____AT,
DIA. PVC PIPE
ELECTRICAL LOAD WORKSHEET
HOUSEHOLD COOKING EQUIPMENT (if any)
Cooking Units - Includes ranges, wall mounted ovens, countertop units, and other
household cooking units.
Number of Units
________unit use
________units use
________units use
________units use
________units use
VA per unit Load in watts
8,000 watts:
11,000 watts:
14,000 watts:
17,000 watts:
20,000 watts:
Subtotal
___n/a__________ watts
_____________ watts
_____________ watts
_____________ watts
_____________ watts
COOKING TOTAL =____________watts
LOAD AMPACITY =________________ watts / 230 V =______________
SIZE OF CONDUCTORS =___________mm2 , _______ Cu.WIRE
MINIMUM SIZE OF CIRCUIT BREAKER =
SIZE OF CONDUIT
= _____________
mm2 ,
Page 6
_____________AT,
DIA. PVC PIPE
AMPS
ELECTRICAL LOAD WORKSHEET
SPACE HEATING / AIR CONDITIONING (if any)
Note : each unit must have a separate circuit breaker and conductor feeder.
Use 746 W for 1 Hp
1.
Air conditioner nameplate rating :___1.5 hp x 746= 1119___watts X____1__ pc
= __1119________watts
SIZE OF WIRE AND BREAKER
OF _1.5 hp__ACU.
LOAD AMPACITY = _1119___ watts / 230 V X 125% =___6.081__
AMPS
SIZE OF CONDUCTORS =__5.5_______mm2 , __TW_ Cu.WIRE
SIZE OF CONDUIT
=
____13________
mm2 ,
MINIMUM SIZE OF CIRCUIT BREAKER
LOAD AMPACITY =_1119___ watts / 230 X 250 %
MINIMUM SIZE OF CIRCUIT BREAKER =
Page 7
DIA. PVC PIPE
OF
1.5 hp_ACU
=____12.16___
______30_______AT,
AMPS
ELECTRICAL LOAD WORKSHEET
HEAT
PUMP
2.
Largest condensing unit nameplate :___N/A_____watts X______ pc
=__________watts AND
Supplementary heat (resistance) : ________watts X______ pc = __________watts
SIZE OF WIRE AND BREAKER
OF ________________.
LOAD AMPACITY = _______ watts / 230 V X 125%
=______________
AMPS
SIZE OF CONDUCTORS =___________mm2 , _______ Cu.WIRE
SIZE OF CIRCUIT BREAKER= _______ watts / 230 V X 250 % =_________AMPS
MINIMUM SIZE OF CIRCUIT BREAKER =
SIZE OF CONDUIT
= _____________
_____________AT,
mm2 , DIA. PVC VOLT
Page 8
ELECTRICAL LOAD WORKSHEET
NUMBER
CIRCUIT TO BE INSTALLED
NOTE: IDENTIFY THE ROOMS AND THE NUMBER OF LAMPS TO BE
CONNECTED IN ONE CIRCUIT.
CIRC
UIT
NO.
1
2
ROOM NAME
NO. OF
LAMPS
I
VA / 230 V
bedroom
3
1.304
Kitchen/dining
4
2.173
C.R.
2
0.869
Master bedroom
4
2.173
Living
6
2.608
CURRENT
AMPS
4.346
4.781
DETERMINE THE SIZE OF WIRE, CONDUIT AND OVERLOAD PROTECTIVE
DEVICE OF EACH CIRCUIT.
CIRCUIT
NO.
SIZE OF WIRE AND CONDUIT
SIZE OF OVERLOAD
PROTECTIVE DEVICE
1
2-2.0 sq. mm TW copper wire
2
2-2.0 sq. mm TW copper wire
15 AT
15 AT
Page 9
ELECTRICAL LOAD WORKSHEET
NUMBER
CIRCUIT TO BE INSTALLED
NOTE: IDENTIFY THE ROOMS AND THE NUMBER OF CONVENIENCE
OUTLET NOT INCLUDING LARGE MOTOR LOADS,ACU, AND HEATING
LOADS 8000 W AND ABOVE TO BE CONNECTED IN ONE CIRCUIT.
CIRC
UIT
NO.
3
ROOM NAME
NO. OF C.O.
VA / 230 V
CURRENT
AMPS
bedroom
2 - 2 gang
3.130
7.825
Kitchen/dining
3 - 2 gang
4.695
2 - 2 gang
1-3 gang
2 - 2 gang
5.714
C.R.
Master bedroom
Living
8.844
3.130
16.669
DETERMINE THE SIZE OF WIRE, CONDUIT AND OVERLOAD PROTECTIVE
DEVICE OF EACH CIRCUIT.
CIRCUIT
NO.
3
SIZE OF WIRE AND CONDUIT
3.5 sq. mm TW copper wire
Page 10
SIZE OF OVERLOAD
PROTECTIVE DEVICE
20 AT
ELECTRICAL LOAD WORKSHEET
NUMBER
CIRCUIT TO BE INSTALLED
NOTE: IDENTIFY THE ROOMS AND THE NUMBER OF LARGE MOTOR
LOADS,ACU, AND HEATING LOADS 8000 W AND ABOVE TO BE
CONNECTED . EACH LOAD MUST HAVE A SEPARATE OVERLOAD
PROTECTIVE DEVICE.
CIRCUIT
NO.
4
LOAD
CURRENT
AMPS
6.081
1119 W
DETERMINE THE SIZE OF WIRE, CONDUIT AND OVERLOAD PROTECTIVE
DEVICE OF EACH CIRCUIT.
CIRCUIT
NO.
SIZE OF WIRE AND CONDUIT
SIZE OF OVERLOAD
PROTECTIVE DEVICE
4
5.5 sq. mm TW copper wire
30 AT
Page 11
ELECTRICAL LOAD WORKSHEET
TOTAL DEMAND ON SYSTEM
( WITH AIRCONS AND MOTOR LOADS)
Sum of all totals :
= _____1900____watts
1.
LIGHTING LOAD TOTAL
2.
3.
4.
5.
CONVENIENCE OUTLET TOTAL
=___3780______watts
WATER HEATER TOTAL (if any)
=_________________watts
COOKING TOTAL (if any)
= _______________watts
MISCELLANEOUS EQUIPMENT TOTAL =__________________watts
( If any )
SPACE HEATING/AIR CONDITIONING TOTAL =___1119_________watts
6.
TOTAL LOAD
= _______6799________watts
MAIN SERVICE SIZING
( WITH AIRCONS AND MOTOR LOADS)
1.
LOAD AMPACITY = ( ___6799_watts / 230 V ) X
LOAD AMPACITY
125 %
=_____29.56 x 1.25_=
36.95_
I = 36.95 x demand factor (80%) = 29.56
AMPS
A
2.
SIZE OF CONDUCTORS =____8.0_______mm2 , ___THW__ Cu.WIRE
3.
MINIMUM SIZE OF CIRCUIT BREAKER

USE _40 ___ AT
4.
SIZE OF CONDUIT
5.
SIZE OF GROUND CONDUCTORS =___________mm2,_______ Cu.WIRE
ATTACHED WITH ARE
1.
2.
3.
4.
5.
=
______25____ mm2 ,
:
FLOOR PLAN
LIGHTING LAYOUT
POWER LAYOUT
SCHEDULE OF LOADS
ONE LINE DIAGRAM
Page 12
DIA. ____RSC___PIPE