REPUBLIC OF THE PHILIPPINES

DPWH
OFFICE OF THE BUILDING OFFICIAL

SPECIFICATIONS
1. ELECTRIC SERVICE SHALL BE 230V, 1-PHASE, 2-WIRE, 60 CYCLES SAN MANUEL, ISABELA
PER SECOND.

2. MAIN DISCONNECT SWITCH SHALL BE 60 AT,125 AF, 600V, 18 KAIC,

2P THERMAL -MAGNETIC MOLDED CASE CIRCUIT BREAKER.

3. SERVICE ENTRANCE CONDUCTORS SHALL BE 1 SET OF 2 X 14 mm²

THW CU. WIRE.
p

e
h 4. TYPE OF WIRING SHALL BE CONCEALED ON WALLS AND CEILING
e l m S FOR LIGHTING AND POWER LOADS SHALL BE DONE IN PVC WITH
MINIMUM SI E OF 15MM. ELECTRICAL
S
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5. INSTALLATION HEIGHT SHALL BE AS FOLLOWS:
g S3lmn o A) LIGHTING SWITCHES 1.4 m ABOVE FINISHED FLOOR LINE
f S n B) CONVENIENCE OUTLETS 0.3 m ABOVE FINISHED FLOOR LINE
C) PANELBOARDS (@ THE CENTER) 1.7 m ABOVE FINISHED FLOOR LINE
L E G E N D
d d S3def
b S3opq
6. SWITCHES AND CONVENIENCE OUTLETS SHALL BE RATED 10
i DN
AND 15 AMPERES RESPECTIVELY, 240 V, FLUSH TYPE. SERVICE ENTRANCE
j
c c
k C2 CIRCUIT BREAKER
7. ALL MATERIALS AND E UIPMENT TO BE USED SHALL BE BRAND NEW AND
S3ijk
APPROVED FOR THAT PURPOSE.
a a
S3abc UP
c
CIRCUIT HOMERUN
8. ALL ELECTRICAL CONDUCTORS TO BE USED SHALL BE STRANDED
COPPER AS MANUFACTURED BY PHELPS DODGE OR APPROVED E UAL.
i
j 9W PINLIGHT
b
C1 9. EFFECTIVE GROUNDING SYSTEM SHOULD BE PROVIDED IN ACCORDANCE 32W CIRCULAR
WITH THE LATEST PROVISION OF THE PHILIPPINE ELECTRICAL CODE.
FLUORESCENT LAMP
10. ALL ELECTRICAL INSTALLATION SHALL BE DONE UNDER THE DIRECT q
SUPERVISION OF A DULY LICENSED ELECTRICAL ENGINEER OR MASTER 23W PINLIGHT
ELECTRICIAN.
300 VA CHANDELIER
GROUND FLOOR LIGHTING LAY OUT SECOND FLOOR LIGHTING LAY OUT 11. ALL WORKS SHALL BE DONE IN ACCORDANCE WITH THE LATEST EDITION OF
THE PHILIPPINE ELECTRICAL CODE (PEC), THE RULES AND REGULATIONS OF CIRCUIT LINE
LOCAL AND NATIONAL AUTHORITIES CONCERNED WITH ENFORCEMENT OF
RULES AND REGULATIONS OF LOCAL UTILITY COMPANY
COVENIENCE OUTLET LINE

2
DUPLEX CONVENIENCE OUTLET

C5 C6 C3 C4 CH
COUNTER HEIGHT OUTLET

WP
WEATHER PROOF D.C.O.

ref ra
DESIGN ANALYSIS Ra
RANGE OUTLET

REF
REFRIGERATOR OUTLET

EMP
ELECTRIC MOTOR PUMP
AIR CONDITIONING UNIT
CIRCUIT C5 ReF Outlet @ 700 VA ACU OUTLET
CIRCUIT C1 14 LO @ 25 VA = 350 VA
I = 700 VA / 220 V = 3.18 A ONE GANG SWITCH
I = 350 VA / 220 V = 1.59 A S.
Ic = 3.18 x 1.25 = 3.98A
Ic = 1.59 x 1.25 = 2.00 A
DN USE:2- 3.5 sq. mm. THHN Cu. Wire + S2. TWO GANG SWITCH
USE: 2- 2.0 sq. mm. THHN Cu. Wire IN 15mmØ Conduit
1- 2.0 sq. mm. TW (G) IN 15 mm Conduit
15AT CB, 2P, 250V, 10KAIC
20AT CB, 2P, 250V, 10KAIC S3. THREE GANG SWITCH
CIRCUIT C2 15 LO @ 25 VA = 375 VA
CIRCUIT C6 Range Outlet @ 2000 VA
UP

I = 375 VA / 220 V = 1.7 A S3W. THREE WAY SWITCH

I = 2000 VA / 220 V = 9.1 A
Ic = 1.7 x 1.25 = 2.13 A Ic = 9.1 x 1.25 = 11.4A
USE: 2- 2.0 sq. mm. THHN Cu. Wire IN 15mmØ Conduit CATV SPLITTER BOX
USE:2- 5.5 sq. mm. THHN Cu. Wire +
acu 15AT CB, 2P, 250V, 10KAIC 1- 2.0 sq. mm. TW (G) IN 15 mm Conduit
CATV SERVICE ENTRANCE
30AT CB, 2P, 220V, 10KAIC
CIRCUIT C3,C4 7 CO @ 180 VA = 1260 VA
C7 CIRCUIT C7 ACU, @1500 va TELEPHONE OUTLET
I = 1260 VA / 220 V = 5.73 A
Ic = 5.73 x 1.25 = 7.16 A I = 1500 VA / 220 V = 6.82 A
Ic = 6.82 x 1.25 = 8.5 A TTC TELEPHONE TERMINAL CABINET
USE: 2- 3.5 sq. mm. THHN Cu. Wire +
1- 2.0 sq. mm. TW (G) IN 15 mm Conduit USE:2- 5.5 sq. mm. THHN Cu. Wire +
1- 2.0 sq. mm. TW (G) IN 15 mm Conduit
CATV CATV OUTLET
20AT CB, 2P, 250V, 10KAIC
30AT CB, 2P, 220V, 10KAIC
GROUND FLOOR POWER LAY OUT SECOND FLOOR POWER LAY OUT PANEL BOARD
MPB
MAIN PANEL BOARD

DONE IN THE OFFICE OF DESIGN BY: NOTE PROJECT TITLE/LOCATION: APPROVED BY: SHEET CONTENTS: REVISION: DATE: DRAWN BY: SHEET NO.:

THIS DRAWING AND SPECIFICATION AND OTHER

CONTRACT DOCUMENTS DULY SIGNED, STAMPED OR DATE :
DANILO J. VILLALOBOS
NONARD LUABLE SUVISOR PROFESSIONAL ELECTRICAL ENGINEER
SEALED AS INSTRUMENT OF SERVICE ARE THE
INTELLECTUAL PROPERTY AND DOCUMENTS OF THE

PROPOSED TWO-STOREY Jessie Jane Ramos CHECKED BY:

1
E
ARCHITECT, WHETHER THE OBJECT FOR WHICH THEY ARE
MADE, ARE EXECUTED OR NOT. IT SHALL BE UNLAWFUL

RESIDENCE
FOR ANY PERSON TO DUPLICATE OR TO MAKE COPIES OF AS INDICATED
ARCHITECTURAL OFFICE PTR NO.: 8809066 PRC NO.: 002894 SAID DOCUMENTS FOR USE IN THE REPETITION OF AND DATE:

ISSUED ON: 1/2/2025 TIN: 127-723-339

FOR OTHER PROJECTS OR BUILDING, WHETHER
EXECUTED PARTLY OR IN WHOLE, WITHOUT THE WRITTEN
CONSENT OF ARCHITECT OR AUTHOR OF THE SAID
DOCUMENTS.
FILE NAME:
2
ISSUED AT: ILOILO CITY IAPOA: PUROK RANG-AYAN, DISTRICT #3, SAN MANUEL, ISABELA OWNER FILE NO.:
SEC. 33 REPUBLIC ACT 9266
 REPUBLIC OF THE PHILIPPINES

DPWH
SCHEDULE OF LOADS SHORT CIRCUIT CALCULATION
OFFICE OF THE BUILDING OFFICIAL

CKT
VOLT LOADS LOAD CIRCUIT PROTECTION CONDUIT EXISTING TRANSFORMER , 100KVA / 230V ,1PHASE , % Z=1.6%
DESCRIPTION VOLTS AMPERE CURRENT WIRE SIZE AND TYPE IMPEDANCE DIAGRAM
NO. SIZE ( µPVC )
(VA) L.O. C.O. OTHERS (A) AT AF POLE
SHORT CIRCUIT CURRENT CALCULATION ( PER UNIT METHOD )
C-1 LIGHTING OUTLET 220V 350 14 1.59 15 AT 50 2 2.0MM² THHN CU 15MMØ SAN MANUEL, ISABELA

C-2 LIGHTING OUTLET 375 15 1.70 15 AT 2.0MM² THHN CU UTILITY SHORT CIRCUIT AVAILABLE , 100MVA Zs = .001

2- 3.5MM² THHN CU + USE : 100KVA BASE

C-3 CONVENIENCE OUTLET @ 180VA 1260 7 5.73 20 AT
1 - 2.0MM² TW Cµ (G)
CONVENIENCE OUTLET @ 180VA 2- 3.5MM² THHN CU + Compute PU value of Utility source ( pu Zs )
C-4 1260 7 5.73 20 AT Zt = .016
1 - 2.0MM² TW Cµ (G) Pu Zs =KVA base / Utility SC KVA=100/100,000=.001 pu E

C-5 REF OUTLET, 700 1 3.18 20 AT

2- 3.5MM² THHN CU + Compute PU for Transformer , ( pu Zt )
1 - 2.0MM² TW Cµ (G) Pu Zt= Impedance in percent / 100=1.6/100=.016 pu ELECTRICAL
2- 5.5MM² THHN CU +
C-6 RANGE OUTLET, 2000 VA 2000 1 9.1 30 AT Zw1 = .09
1 - 2.0MM² TW Cµ (G)
2- 5.5MM² THHN CU + Compute value for feeder line
C-7 ACU, 1500 VA 1500 1 6.82 30 AT
1 - 2.0MM² TW Cµ (G) "a"
X
C-8 SPARE 500 2.27 20 AT For 1- Set of 2 x 14 mm sq. ( PVC Conduit )L=30M
from PEC Table 9.1.1.9
C-9 SPARE 500 2.27 20 AT Xl = 0.051 R=.49
Z=sqrt (.051 x .051 + .49 x .49 ) X 30 / ( 305 )= .048 SIMPLIFIED DIAGRAM
C - 10 SPARE 500 2.27 20 AT 50 2
Convert cable impedance from ohm to "pu"
pu Z = ohm impedance x KVA base / (KVsquare x 1000)
220V 29 14 3 60 AT 125 2 = .048 x 100 / ( .230 x .230 x 1000 ) = .09
8945 40.66 14.0MM² THW cu 25MMØ
Z = .107 1.0
SIZE OF MAIN FEEDER: USE:
It = 40,66 AMPS 60 AT, MCB, 2P
Ic= 40.66 AMPS X 1.25 = 50.8 AMPS. 2 - 14MM² THW Cµ WIRE + 8MM² (G)
@ fault " a "
25 MM DIA. PVC CONDUIT X
SINGLE LINE DIAGRAM

100 MVA
SERVICE ENTRANCE, 2W E base Va
lsc = x
TRANSFORMER Z base V
100 KVA ,230V ,1.6%
1.0 x 100,000
lsc = = 4063A
.107 230 V
14 mm² ( L=30m)
M
Use : 10 Kaic Circiut Breaker
SINGLE LINE DIAGRAM MCB

X "a"

VOLTAGE DROP CALCULATION

Voltage Drop ( VD ) = l ( sqrt ( R sq + Xl sq )
Where l = Line current
R = line AC Resistance , Ohms
X = Line reactance @ 60Hz , Ohms

@ MCB

Length - 30 mtrs. Size of wire - 2 x 14 mm sq. ( PVC Conduit )

Total Current = 40.66 Amps.
from PEC Table 9.1.1.9
Xl = .051
R = .49
Vd = 40.66 ( sqrt ( .051x .051 + .49 x .49) ) x 30 x 2 / ( 305 m ) = 3.94 Volts
% Vd = 3.94 x 100 / 230V = 1.71 %

GROUND

DONE IN THE OFFICE OF DESIGN BY: NOTE PROJECT TITLE/LOCATION: APPROVED BY: SHEET CONTENTS: REVISION: DATE: DRAWN BY: SHEET NO.:

THIS DRAWING AND SPECIFICATION AND OTHER

CONTRACT DOCUMENTS DULY SIGNED, STAMPED OR DATE :
DANILO J. VILLALOBOS
NONARD LUABLE SUVISOR PROFESSIONAL ELECTRICAL ENGINEER
SEALED AS INSTRUMENT OF SERVICE ARE THE
INTELLECTUAL PROPERTY AND DOCUMENTS OF THE

PROPOSED TWO-STOREY Jessie Jane Ramos CHECKED BY:

2
E
ARCHITECT, WHETHER THE OBJECT FOR WHICH THEY ARE
MADE, ARE EXECUTED OR NOT. IT SHALL BE UNLAWFUL

RESIDENCE
FOR ANY PERSON TO DUPLICATE OR TO MAKE COPIES OF AS INDICATED
ARCHITECTURAL OFFICE PTR NO.: 8809066 PRC NO.: 002894 SAID DOCUMENTS FOR USE IN THE REPETITION OF AND DATE:

ISSUED ON: 1/2/2025 TIN: 127-723-339

FOR OTHER PROJECTS OR BUILDING, WHETHER
EXECUTED PARTLY OR IN WHOLE, WITHOUT THE WRITTEN
CONSENT OF ARCHITECT OR AUTHOR OF THE SAID
DOCUMENTS.
FILE NAME:
2
ISSUED AT: ILOILO CITY IAPOA: PUROK RANG-AYAN, DISTRICT #3, SAN MANUEL, ISABELA OWNER FILE NO.:
SEC. 33 REPUBLIC ACT 9266