Building Utilities Flashcards
arki3a (312 cards)
1
Q
An instrument for measuring the rate of flow of electricity; usually expressed in amperes
A
Ammeter
2
Q
The current carrying capacity of a wire or cable; expressed in amperes
A
Amperage
3
Q
On a theatre stage; a master switch that distinguishes all stage lights simultaneously.
A
Blackout Switch
4
Q
The portion of an electric wiring that extends beyond the final over current device protecting the circuit
A
Feeder Line
5
Q
An underground structure used in pulling or splicing electric cables which are laid underground.
A
Cable Vault
6
Q
The luminous intensity of a light source; expressed in candelas.
A
Candlepower
7
Q
Flow of electricity in a circuit; the unit of measurement is the ampere.
A
Current
8
Q
In an electric circuit; a current that flows in one direction only
A
Direct Current
9
Q
In electric wiring a metal plate; water pipe; or other type of conductor buried in the earth in manner ensuring a good conductive path to the ground.
A
Grounding Wire
10
Q
A unit of illumination equal to 1 lumen per square foot.
A
Footcandle
11
Q
A movement or flow of electrically charged particles; typically measured in amperes.
A
Electric current
12
Q
What is a utilization equipment which is generally industrial built in?
A
appliances
13
Q
a generator of alternating current
A
alternator
14
Q
device used to measure rate of flow of electricity
A
ammeter
15
Q
device for storing electric energy
A
capacitor
16
Q
What is a surface; material; device; or object that scatters light or sound from a source?
A
diffuser
17
Q
device used to transform AC to DC
A
rectifier
18
Q
device that indicates light intensity in Footcandle
A
illumeter –
19
Q
What is a flexible armored conduit used to encase electrical wiring?
A
greenfield
20
Q
controls the flow of current to the distribution elements
A
regulator
21
Q
cap that receives the service drop
A
entrance cap
22
Q
box used for maintaining light control devices
A
utility box
23
Q
What is an electromagnetic force flowing between the positive and negative terminals?
A
flux
24
Q
electromotive force
A
voltage
25
number of AC that flow in a conductor
phase
26
rate or measure of power used or consumed
watt –
27
What is an electric device having a resistance which can be adjusted?
rheostat
28
controls the flow of current to the distribution elements
regulator
29
instrument used to measure the resistance of a conductor
ohmmeter
30
materials that resist the flow of electric current
insulator
31
What is the unit for quantity of electricity?
coulomb
32
unit of resistance
ohm
33
unit of electromotive force
volts
34
unit of candlepower
candela
35
Standard length of an electrical metal conduit.
10 ft.
36
PABX or PBX means.
Pvt. Automatic Branch Exchange
37
Farad is the unit capacity of a ___.
Capacitor
38
Another name for distribution panel.
Power Panel
39
Standard size of wire for a circuit line.
No. 12
40
Standard size of wire for a switch line.
No. 14
41
A device for converting alternating current to direct current.
Rectifier
42
Another name for a Rectifier.
D.C. Generator
43
Interrelationship between value of voltage and current with the same frequency.
Phase
44
Minimum wire size in square millimeter for a branch circuit with a 30 ampere rating using Type THW strandedcopper conductor in a raceway.
5.5 sqmm
45
Standard frequency of power supplied by the local power utility company like Meralco.
60 Cycles
46
The overhead service conductors from the last pole or other aerial support to and including splices; if any; connecting to the service entrance conductors at the building.
Service Drop
47
The simplest type of building automation system.
Telecommunication System
48
Resistance in alternating current system.
Impedance
49
The reciprocal of conductance.
Resistance
50
A rigid metal housing for a group of heavy conductors insulated from each other and the enclosure; also called Busduct.
Busway
51
A heavy conductor; usually in the form of a solid copper bar; used for collecting; carrying; and distributing large electric currents; also called a busbar.
Bus
52
An approved assembly of insulated conductors with fitting and conductor terminations in completely enclosed ventilated protective metal housing where the assembly is designed to carry fault current and to withstand the magnetic forces of such current.
Busway
53
A box with a blank cover which serves the purpose of joining one different runs of raceways or cables and provided with sufficient space for connection and branching of the enclosed conductors.
Pull Box
54
This shows the vertical relationships of all panels; feeders; switches; switchboards; and major components are shown up to; but not including; branch circuiting; it is an electrical version of a vertical section taken through the building.
Riser Diagram
55
In a lightning protection system; the combination of a metal rod and its brace or footing; on the upper part of a structure.
Air Terminal
56
TW in electrical wire specification means.
Moisture resistant; in wet and dry location
57
XHHN in wire specification means.
Moisture and Heat Resistant- Cross-Linked Thermosetting
58
Mho as used in electrical systems calculation is defined as _______.
the reciprocal of ohm
59
A unit of mechanical power is horsepower. What is electrical power?
Watt
60
Who said these prophetic words: “Let the future tell the truth and evaluate each one according to his work and accomplishment. The present is theirs; the future for which I really worked for is mine.?
Nikola Tesla
61
A type of raceway specially constructed for the purpose of pulling in or the withdrawing of wires or cables after the conduit is in place.
Rigid metal conduit (RMC)
62
The trade name for an insulated conductor with type letter THHN is ______.
Heat resistant thermoplastic
63
What is / are the advantage/s of a circuit breaker over a fuse? a. It can act as a switch b. Its position can be easily detected (close/open) c. It can be used again after fault has been corrected d. All of these
All of these
64
What switch combination may be used in order to control a lamp or group of lamps in three different locations?
2-s3w and 1-s4w
65
It characterizes short circuit
Low resistance; high current
66
A unit or assembly units or sections and associated fittings forming a rigid structural system used to support cables.
Cable tray
67
Fusible material in a fuse may be made of any of the following except___.
Silver
68
It affects the resistance of a conductor. a. Length b. Area c. Temperature
All of the above
69
It is also known as electric panel or load center.
Panelboard
70
A cylindrical conduit or conductor; the wall thickness is sufficient to receive a standard pipe.
Conduit
71
A factory assembly of one or more conductors; each individually insulated and enclosed in a metallic sheath of interlocking metal tape; or a smooth corrugated metallic tube.
metal clad cable (type MC)
72
It is analogous to pressure in water flow.
Current
73
Alternating current is characterized as having _____. a. Positive and negative polarity b. Average value is zero c. Has frequency d. All of these
All of these
74
A circuit type where components are electrically connected end to end.
Series circuit
75
The over-all covering of underground feeder and branch circuit cables shall be ____.
a. Fungus resistant b. Corrosion resistant
76
The basic elements of an electric circuit are the following except
Switch
77
A factory assembly of two or more insulated conductors having an outer sheath of moisture-resistant; flame retardant; non metallic material.
Non metallic sheathed cable (type NM and NMC)
78
Cables are conductors that are ____. a. Larger than wires b. Stranded (no.6 AWG and larger)
Both a and b
79
Which of the following metallic materials is considered as the best conductor of electricity?
Gold
80
Example/s of conductors-on-insulator wiring is are ______. a. Concealed knob and tube b. Open wiring on insulators
Both a and b
81
A type of surface flush raceway designed to receive conductors and receptacles assembled in the field or in the factory.
Multi-outlet assembly
82
A type of switch used for transferring one or more load conductor connections from one power source to another.
Transfer switch
83
The part of the cut out that is design to open or break an electrical current under an excessive load
CIRCUIT BREAKER
84
Unit of power
WATTS
85
The unit used in the measure of the rate of flow of electricity
AMPERE
86
This is where an electric service conductor can be installed
TOWER OR FLATFORM
87
A type of electric switch consisting of one or more movable copper blades which are hinged and which make contact with stationary forked contract jaws being forced between them
KNIFE SWITCH
88
Provision for building with an expected electric load demand of 200KVA
TRANSFORMER VAULT
89
The conversion of alternating current (AC) to direct current (DC)
RECTIFIER
90
A kind of flourescent lamp that does not use starter element
RAPID START FLOURESCENT LAMP
91
An iron box or casing by which electrical conduit branches are formed
JUNCTION BOX
92
A passenger elevator with a constant 24 hour service for residential condominum
5 STOREYS
93
Minimum service drop of connection line above the ground and from the ground
3.00 m
94
Minimum distance of poles and transformer support located from the road right of way
500 mm
95
A vertical flow of air used to separate different function of spaces
AIR CURTAIN
96
Original name of P-Trap
GOOSENECK
97
The main feed line of an electrical circuit to which branch circuits are connected
DISTRIBUTION LINE
98
The minimum width of door in hospital housing unit
1.20m
99
Another type of circuit breaker element other than bolt-on
PLUG IN TYPE
100
The most practical conductor of electricity
COPPER WIRE
101
A channel system in carrying electrical wire
RACEWAY
102
An electric conductor consisting of a group of smaller diameter conductor strands twisted together
CABLE WIRE
103
Another name for power panel
DISTRIBUTION PANEL
104
A device used to convert voltage from higher to lower or vise versa
TRANSFORMER
105
Metal containing no iron such as copper; brass and aluminum
NON FERROUS METAL
106
The minimum allowance clearance from the highest point of the roof to the service drop conductor from NBC
2.50m
107
To bring down voltage
STEP DOWN TRANSFORMER
108
Wiring not concealed by the building sructure
OPEN WIRING
109
Transferring the power load from the building circuitry to standby generator or during brownout
AUTOMATIC TRANSFER SWITCH
110
One with contacts that separate in air
AIR SWITCH
111
The voltage across the welding arc
ARC VOLTAGE
112
Cable provided in wrapping of metal usually steel wires or tapes; primarily for the purpose of mechanical protection
ARMORED CABLE
113
A synthetic non-flammable insulating liquid which; when decomposed by an elctric arc evolves only non-explosive gases
ASKAREL
114
Is combination of all or a portion of component parts included in an electric apparatus; mounted on a supporting frame or panel and properly interwined
ASSEMBLY
115
Minimum load over a given period of time
BASE LOAD
116
That portion of a wiring system extending beyond the final overcurrent device protecting the current
BRANCH CIRCUIT
117
Is a conductor; or group of conductors; in switchgear assemblies which serves as a common connection for two or more circuit
BUS
118
Approved assembly of insulated conductors with fitting and conductor terminations in a completely enclosed; ventilated protective metal housing where the system is design to carry fault current and to withstand the magnetic forces of the current
BUSWAY
119
System of conductor forming an essentially continuous conducting network over the object protected and including any conductors necessary for interconnections of the object protected and an adequate ground
CAGE
120
A device design to open under abnormal conditions a current carrying circuit without injury itself
CIRCUIT BREAKER
121
A wire or combination of wires not insulated from one another suitable for carrying electric current
CONDUCTOR
122
A device or group of devices which serves to govern in some predetermined manner; the electric power delivered to the apparatus to which it is connected
CONTROLLER
123
A luminous discharge due to ionization of the air surrounding a conductor caused by voltage gradient exceeding a certain critical value
CORONA
124
A metal housing that houses the circuit breaker or fuses; surface mounted
CUT OUT BOX
125
Is the ratio of the maximum demand of the system or part of the system to the total connected load of the system
DEMAND FACTOR
126
A unit of electrical system which is intended to carry but not utilize electrical energy
DEVICE
127
A single enclosed runway for conductor cables
DUCT
128
Machine which transforms electric power into mechanical power
ELECTRIC MOTOR
129
The circuit conductors between the service equipment or the generator switchboard of an isolated plant and the branch circuit overcurrent device
FEEDERS
130
Unit of illumination when the foot is taken as the unit of length. It is the illumination on a surface one square foot in area in which there is uniformly distributed flux of one lumen
FOOTCANDLE
131
An overcurrent protective device with a circuit opening fusible member which is heated and severed by the passage of the overcurrent through it
FUSE
132
Types of lighting that deals with lighting relatively large area covered
GENERAL LIGHTING
133
Density of the luminous flux on a surface
ILLUMINATION
134
Is a form of air switch in which the moving element is a hinge blade wedge between stationary contact blades when closed
KNIFE SWITCH
135
Artificial source of light
LAMP
136
Device for mechanical support of light
LAMPHOLDER
137
A radiant energy
LIGHT
138
Protective device for limitting surge voltage on equipment by discharging or by-passing surge current
LIGHTNING ARRESTER
139
Is a transient electric disturbance in an electric circuit caused by lightning
LIGHTNING SURGE
140
Is the radial branch connection to a main line
LINE TAP
141
Is the ratio of the average load over a designated period of time to the peak load occuring in that period
LOAD FACTOR
142
Unit of luminous flux
LUMEN
143
A unit of illumination equal to one lumen per square meter
LUX
144
Point of the wiring system at which current is taken to supply utilization equipment
OUTLET
145
A metal box at an outlet which encloses one or more receptacle
OUTLET BOX
146
Maximum load consumed by a unit in a stated period of time
PEAK LOAD
147
Device or equipment which is supended from overhead either by means of the flexible cord
PENDENT
148
Auxillary conductor used in connection with remote measuring devices for operating apparatus at a distant point
PILOT WIRE
149
Box with a blank cover which is inserted in one or more runs of raceway to facilitate pulling in the conductors and the distributing of the conductors
PULLBOX
150
Any channel for holding wires; cables or busbars
RACEWAY
151
Convinience Outlet; Contact device installed at an oulet for the connection of an attachment plug
RECEPTACLE
152
A raceway especially constructed for the purpose of physical protection of conductors; the pulling in or the conduit is in place and made of metal pipe of standard width and thicknesswithdrawing of wires or cables after the
RIGID METAL CONDUIT
153
Enclosure of porcelain or other insulating material fitted with terminals and intended for connecting the flexible cord carrying a pendent to permanent wiring
ROSETTE
154
The overhead service conductor from the last pole or other aerial support to and including splices if any connecting to the service entrance conductors at the building
SERVICE DROP
155
The raceway that encloses the service entrance conductors
SERVICE RACEWAY
156
Cable designed for service under water
SUBMARINE CABLE
157
Is a transient variation in the current potential or power
SURGE
158
Minimum wire size of THW stranded copper conductor in raceway for a branch circuit in a 30 ampere rating
5.5 mm2
159
This connetions is used where the load is comparatively small and the length of the secondary circuit is short
SINGLE PHASE TO SUPPLY 120 V LIGHTING LOAD
160
This connections is used in most urban distribution circuits
SINGLE PHASE TO SUPPLY 120/240 3-WIRE LIGHTING AND POWER LOAD
161
The 120/240 volt winding is connected in series serving 240 volts on a two wire system; this connection is used for small industrial applications
SINGLE PHASE FOR POWER
162
Consist merely of two single phase transformers operated 90deg out of phase; the common wire must carry /2 times the load current
TWO PHASE CONNECTIONS
163
This is used to supply a single phase lighting load and three phase power load simultaneously
DELTA-DELTA FOR POWER AND LIGHTING
164
This connection is used when single phase lighting load is large as compared with the power load
OPEN DELTA FOR LIGHTING AND POWER
165
Often it is desirable to increase the voltage of a circuit form a 2400 to 4160 volts to increase its potential capacity
Y DELTA FOR POWER
166
This connection is similar to the delta-delta bank with only the primary connection changed The primary neutral should not be grounded or tied into the system neutral; since a single phase ground fault may result in extensive blowing of fuses throughout the system This connection requires special watt-hour metering
Y DELTA FOR LIGHTING AND POWER
167
When operating Y delta and one service is disabled; service maybe maintained at reduced load
OPEN Y DELTA
168
The single phase lighting load is all on one phase resulting in unblanced primary currents in any one bank
DELTA Y FOR LIGHTING AND POWER
169
The primary voltage was increased from 2400 to 4160 volts to increase the potential capacity of the system
Y-Y FOR LIGHTING AND POWER
170
When the ratio of transformation from the primary to secondary voltage is small; the most economical way of stepping down the voltage
Y-Y AUTO TRANSFORMER
171
In some localities two phase power is required from three phase system
SCOTT CONNECTION 3PHASE TO 2PHASE
172
If it should be necessary to supply three phase power from a two phase system; the special tap must be provided on the secondary side
SCOTT CONNECTED 2PHASE TO 3PHASE
173
Thermoplastic
T
174
Moisture Temperature Resistant
TW
175
Underground Feeder
UF
176
Flourinated Ethylene Propylene Moisture Resistant
FEPW
177
Heat Resitant Rubber
RH
178
Heat and Moisture Resistant Rubber
RHW
179
Heat Resistant Latex Rubber
RUH
180
Moisture and Heat Resistant Thermoplastic
THW
181
Heat and Moisture Resistant Thermoplstic with Nylon
THWN
182
Moisture and Heat Resistant Cross Link Polymer
XHHW
183
Armored Cable
BX
184
THERMOPLASTIC HEAT RESISTANT
THHN
185
POLYETHELENE
PE
186
SILICON ASBESTOS
SA
187
ASBESTOS AND VARNISH CAMBRIC
AVA
188
Use low melting point solders or metal the expand when exposed to heat to detect fire
FIXED TEMPERATURE
189
135deg-197deg F
HEAT DETECTOR
190
Use of the scattering of light by smoke into view of photo cell through incandescent or diode
PHOTO ELECTRIC DETECTOR
191
It responds to the high-frequency radiant energy from flames. Alarm is only triggered when IR energy flickers at rate which is chracteristics of flame
INFRARED FLAME DETECTOR
192
Uses the interruption of small current flow between electrodes by smoke in ionized sampling
IONIZATION SMOKE HEAT
193
chamber to detect fire
DETECTOR
194
Fabricated assembly of insulated conductors enclosed in flexible metal sheath. It is used both on exposed and concealed work
ARMOR CABLE (AC)
195
A factory assemble cable of one or more conductors each individualy insulated and enclosed in a mettalic sheath of interlocking tape of smooth or corrugated tube. This type of cable is especially used for service feeders; branch circuit and for indoor; outdoor work
METAL CLAD CABLE (MC)
196
Is a factory assembly of one or more conductors insulated with highly compressed refractory mineral insulation enclosed in a liquid and gas tight continous copper sheath. This type of cable is used in dry; wet or continously moist location as service feeders or branch circuit
MINERAL INSULATED CABLE (MI)
197
Is a also a factory assembly of two or more insulated conductors having a moisture resistant; flame retardant and non metallic material outer sheath. This type is used specifically for one or two family dwellings not exceeding 3 storey building
NON METALLIC SHEATED CABLE (NM)
198
This type of cable is factory assembly of two or more insulated conductors in an extruded core of moisture resistant and flame retardant material covered within an overlapping spiral metal tape. This type is used in hazardous locations and in cable trays or in raceways
SHIELDED NON METALLIC SHEATED CABLE (SNM)
199
Is a moisture resistant cable used for underground connections including direct burial in the ground as feeder or branch circuit This is factory assembled two or more insulated conductors with or without associated bare or covered or grounding under a mettalic sheath; This is used for installation of cable trays; raceways; or it is supported by messenger wire
UNDERGROUND FEEDER AND BRANCH CIRCUIT (UF) POWER AND CONTROL TRAY CABLE (TC)
200
Is an assembly of parallel conductors formed integrally with insulating material web designed especially for field installation in metal surface or raceways
FLAT CABLE ASSEMBLY (FC)
201
Consist of three or more flat copper conductor placed edge to edge separated and enclosed with an insulating assembly. This type of cable is used for general purposes such as: appliance branch circuit; and for individual branch circuits; especially in hard smooth continous floor surfaces and the like
FLAT CONDUCTOR CABLE (FCC)
202
Is a single or multi conductor solid dielectric insulated cable rated at 2;000 volts or higher. This type is used for power system up to 35;000 volts
MEDIUM VOLTAGE CABLE (MV)
203
Part of the facility which accept the house cable riser and house the terminal block at each floor and at the highest or end of a feeder riser cable
TELEPHONE TERMINAL CABINET
204
Is the simplest type of building automation system; which intercoms; PABX; microwave links; analog and digital telephone system; video conferencing; satellite links; structured cabling and similar devices
TELECOMMUNICATION SYSTEM
205
Two lights in a long hallway connected in parallel are to be controlled simultaneously at three points
SINGLE POLE SWITCH AT START; 3-WAY SWITCH AT MIDPOINT AND SINGLE POINT SWITCH AT END
206
Factory assembled of two or more insulated conductors w/ or w/o associated bare cover ground conductor under a non metallic sheath approved forr installation in cable trays; in raceways or in supported by a messenger wire
POWER AND CONTROL TRAY CABLE TYPE
207
Heat Resistant Rubber / 75 degrees
RH
208
Light source used in lighting fixtures best specified in areas such as those requiring high illumination levels for detailed work such as needle work
METAL HALIDE
209
A transformer location required in some localities; where a three phase power is required from a two phase system
SCOTT CONNECTION 2 PHASE TO 3 PHASE
210
Moisture Resistant Thermoplastic / 60 degrees
TW
211
Type of switch where pilot light inside a lit to guide the person inside
ILLUMINATED SWITCH
212
Ampacity of an insulated copper conductor; based on ambient temperature of 30degrees w/a 22 sq.m cross sectional area in size for USE
85 amperes
213
Main power supply and wiring system for 110/220 volt line; which wiring diagram fits (drawing)
DRAWINGS
214
Ampacity of an insulated copper conductor; based on ambient temperature of 30degrees w/a 2.0 sq.m cross sectional area in size for TW
15 amperes
215
Best suited for Rigid Nonmetallic Conduit like PVC for underground installation in buildings
PVC IS ALLOWED FOR AS LONG AS BOTH BURIAL DEPTH OF NO LESS 460mm AND CONCRETE ENCASEMENT IS PROVIDED
216
Required minimum vertical clearance of an overhead service drop measured from the ground over residential and comercial properties and driveways not subjected to truck traffic and over 600 volts to ground
5.500 mm
217
Approved assembly of insulated conductors with fitting and conductor terminations in a completely enclosed; ventilated protective metal housing where the system is design to carry fault current and to withstand the magnetic forces of such current
BUSWAYS
218
A raceway especially constructed for the purpose of physical protection of conductors; the pulling in or the withdrawing of wires or cables after the conduit is in place and made of metal pipe of standard width and thickness
RIGID STEEL CONDUIT
219
System of voltage used for computing branch circuits and feeder load
120/240 VOLTS
220
Natural energy source derived from force of wind acting on oblique blades that radiates froma shaft attached to a dynamo to produce electricity
WINDMILL
221
A point in th electrical system where the electrical load of a given area is assumed to concentrate
PANEL BOARD
222
Alternating current generated by the alternator where its wave rises to the peak; sinks to zero; drops to the negative peak and rises again to zero a number of times each second depending on the frequency for which the machine is designed
SINGLE PHASE ALTERNATING CURRENT
223
Alternating current where the alternator comprises of windings mounted at right angles to each other and provided with separate external connections current waves will be produced and each of which will be at its maximum when the other is zero
TWO PHASE ALTERNATING CURRENT
224
Minimum conductor size for for overhead service drop for copper wire or cable
2.2; 30; 8; 14
225
Underground Feeder; 60-75 degrees C
UF
226
Moisture and Heat Resistant Thermoplastic used for dry and wet locations
THW
227
Vertical vent pipes take in front of the last fixture and connects to its soil stack which acts as a vent
CIRCUIT VENT
228
A device designed to open and close a circuit by non automatic means and to open the circuit automatically on predetermined over current without damaged to itself when properly applied within its rating
CIRCUIT BREAKER
229
The raceway that encloses the service entrance conductors
SERVICE RACEWAY
230
A transformer connection which is ideal in the event of change of primary voltage from 2400 volts to 4160 volts to increase the potential capacity of the system
Y-Y FOR LIGHTING AND POWER
231
Maximum allowed ampere rating of one chord or plug utilization equipment connected in a 30 ampere branch circuit for lighting or utilization equipment
24 AMPERE
232
Minimum wire size in sq.mm type THW stranded copper conductor in raceway for a branch circuit with 30 ampere rating
5.5 sq.mm
233
Minimum vertical clearance of an overhead service drop measured from the ground; at the electrical service entrance or above areas or sidewalks accesible only to pedestrian lanes; measure from final grade line or other accesible surface only for service drop cabled together with a grounded bare messenger wire and limited to 300 volts to ground
3500mm
234
Minimum ampacity of feeder conductor with a load of more than two wire branch circuit supplied by a 3-wire feeder but not exceed the computed branch circuit load
30 amperes
235
Minimum wire size in sq.mm type TW copper conductor in raceway for a branch circuit with 20 ampere rating
3.5 sq.m
236
Ampacity of an insulated copper conductor; based on ambient temperature of 30degrees w/a 8 sq.m cross sectional area in size for THW
45 Amperes
237
A branch circuit consisting of two or more grounded conductors having a potential difference between them; and a grounded conductor having equal potential difference between it
MULTI WIRE BRANCH CIRCUIT
238
A type of water coolant operates at a pressure of about 150 atmospheres
PRESSURIZED WATER REACTOR
239
A unit of electrical system which is intended to carry but not utilize electrical energy
DEVICE
240
Approved assembly of insulated conductors with fitting and conductor terminations in a completely enclosed; ventilated protective metal housing where the system is design to carry fault current and to withstand the magnetic forces of such current
BUSWAYS
241
Standard frequency of water supply by the company like Meralco
60 CYCLES
242
Underground Service Entrance / 75degrees
USE
243
The overhead service conductor from the last pole or other aerial support to and including the splices; if any connecting to te service entrance conductors at the building
SERVICE DROP
244
A type of nuclear reactor where the water coolant is permitted to boil within the core by operating at somewhat low pressure
BOILING WATER REACTOR
245
In a 240V; a three phase 3-wire service; branch cicuits are loaded and distributed to each of the three phase with this objective to attain
BALANCE LOADING
246
Unit or assembly of unit sections and associated fittings forming a rigid structural system used to support cables
CABLE TRAYS
247
A transformer connection where the secondary load is a combination of lighting and power. This connection is used when the single phase lighting is large as compared with the power load
OPEN DELTA FOR LIGHTING AND POWER
248
A useful transformer connection applied when single phase lighting load is all on one phase resulting into unbalanced primary
DELTA Y FOR LIGHTING AND POWER
249
Type of flexible cable which is a fabricated assembly of insulated conductors which permit its use at exposed weather or excessive moisture
ARMOR CABLE TYPE ACL
250
A type of alternating current where the alternator comprises the three armature windings set at 120 degrees to each other; current will be produced in the form of triple wave
THREE PHASE ALTERNATING CURRENT
251
Minimum branch circuit rating for household ranges and cooking appliance
30 amperes
252
Type of sound absorbent best for lower band frequencies
POROUS ABSORBENT
253
Unit of frequency which is equal to one cycle per second
HERTZ
254
A type of alternating current generated by alternator; where its wave rises to its peak; sinks to zero; drop to a negative peak and rises again to zero a number of times each seconds depending on the frequency of the machine is designed
SINGLE PHASE ALTERNATING CURRENT
255
Use to accept the P-trap assembly of the lavatory
2 WYE AND 2 x 1/8 BEND COMBINATION
256
A parameter in sizing horizontal branch pipe
NUMBER OF BRANCH VENTS
257
Two lights in a long hallway connected in parallel are to be controlled simultaneously at
SINGLE POLE SWITCH AT START;
258
three points
3-WAY SWITCH AT MIDPOINT AND
259
Main power supply and wiring system for 110/220 volt line; which wiring diagram fits (drawing)
DRAWINGS
260
A CLEARANCE OF NOT LESS THAN 76mm SHALL BE MAINTAINED BETWEEN CONDUCTORS AND NOT LESS THAN 26mm
Pre requisite in use of split knob and tube wiring
261
A branch circuit consisting of two or more grounded conductors having a potential difference between them; and a grounded conductor having equal potential difference between it
MULTI WIRE BRANCH CIRCUIT
262
What is the maximum horizontal range between two or more air terminal for lightning arrest for an effective disaster prevention in building
6000mm to 7600mm
263
Required minimum vertical clearance of an overhead service drop measured from the ground over residential and comercial properties and driveways not subjected to truck traffic and over 600 volts to ground
5500 mm
264
Minimum vertical clearance of an overhead service drop measured from the ground; at the electrical service entrance or above areas or sidewalks accesible only to pedestrian lanes; measure from final grade line or other accesible surface only for service drop cabled together with a grounded bare messenger wire and limited to 300 volts to ground
3500mm
265
Maximum allowed ampere rating of one chord or plug utilization equipment connected in a 30 ampere branch circuit for lighting or utilization equipment
24 amperes
266
Minimum ampacity of feeder conductor with a load of more than two wire branch circuit supplied by a 3-wire feeder but not exceed the computed branch circuit load
30 amperes
267
Ampacity of an insulated copper conductor; based on ambient temperature of 30degrees w/a 22 sq.m cross sectional area in size for USE
85 amperes
268
Ampacity of an insulated copper conductor; based on ambient temperature of 30 degreesw/a 8.0 sq.m cross sectional area in size for THW
45 amperes
269
Ampacity of an insulated copper conductor; based on ambient temperature of 30degrees w/a 2.0 sq.m cross sectional area in size for TW
15 amperes
270
Minimum wire size in sq.mm type THW stranded copper conductor in raceway for a branch circuit with 30 ampere rating
5.5 sq.mm
271
Minimum wire size in sq.mm type TW copper conductor in raceway for a branch circuit with20 ampere rating
3.5 sq.m
272
Minimum branch circuit rating for household ranges and cooking appliance
30 amperes
273
A device that is basically a double throw switch of generally 3-pole connection that will automatically transfer the power from the standby generator to the building circuitry during electrical power failure.
Automatic Transfer Switch (ATS)
274
TW in electrical wire specification means.
Moisture resistant; in wet anddry location
275
A type of lighting that provides illumination to special objects like sculptures; flower arrangements; etc.
Specific Lighting
276
XHHN in wire specification means.
Moisture and Heat Resistant- Cross-Linked Thermosetting
277
Standard length of an electrical metal conduit.
10'
278
The other type of flame detector other than the ultraviolet type.
Infra Red
279
PABX or PBX means.
Pvt. Automatic Branch Exchange
280
Farad is the unit capacity of a ___.
Capacitor
281
Another name for distribution panel.
Power Panel
282
Standard size of wire for a circuit line.
No. 12
283
Standard size of wire for a switch line.
No. 14
284
Interrelationship between value of voltage and current with the same frequency.
Phase
285
Descriptive of any material such as synthetic resin which hardens when heated or cured; and does not soften when reheated.
Thermosetting
286
Minimum wire size in square millimeter for a branch circuit with a 30 ampere rating using
5.5 sqmm
287
Type THW stranded copper conductor in a raceway.
5.5 sqmm
288
Standard frequency of power supplied by the local power utility company like Meralco.
60 Cycles
289
The overhead service conductors from the last pole or other aerial support to and including splices; if any; connecting to the service entrance conductors at the building.
Service Drop
290
The simplest type of building automation system.
Telecommunication System
291
A fire detector installed in a fire alarm system which uses low melting point solders or
Fixed Temperature
292
metal that expands when exposed to heat to detect a fire.
Heat Detector
293
A private telephone system that interconnects with public telephone systems.
PABX
294
Resistance in alternating current system.
Impedance
295
The reciprocal of conductance.
Resistance
296
A rigid metal housing for a group of heavy conductors insulated from each other and the enclosure; also called Busduct.
Busway
297
A heavy conductor; usually in the form of a solid copper bar; used for collecting; carrying; and distributing large electric currents; also called a busbar.
Bus
298
An approved assembly of insulated conductors with fitting and conductor terminations in completely enclosed ventilated protective metal housing where the assembly is designed to carry fault current and to withstand the magnetic forces of such current.
Busway
299
A type of perimeter detector which detects object in heat range of body temperature.
Passive Infrared
300
A type of perimeter detector which detects interruption of light beam.
Light Beam
301
A type of perimeter detector which detects change in sound wave pattern.
Ultrasonic
302
A box with a blank cover which serves the purpose of joining one different runs of raceways or cables and provided with sufficient space for connection and branching of the enclosed conductors.
Pull Box
303
A type of perimeter detector which is subject to false alarm from aircraft radar and from movement outside building through window; wood doors; and the like. It uses radio waves.
Microwave
304
This type of perimeter detector uses both the Passive infrared and Ultrasonic or
Passive Infrared with
305
Microwave system.
Ultrasonic (or Microwave)
306
This type of perimeter detector detects a change in capacitance of the area covered; caused by intrusion.
Proximity / Capacitance
307
A high intensity discharge lamp in which the light is produced by the radiation from a mixture of a metallic vapor; similar to that of a mercury lamp in construction.
Metal Halide Lamp
308
A type of lamp popular for lighting commercial interiors; uses argon gas to ease starting; it produces light by means of an electric discharge in mercury vapor.
Mercury Lamp
309
A type of lamp which produces light by means of the reaction of halogen additive in the bulb reacts with chemically with tungsten.
Tungsten Halogen Lamp
310
A type of lamp generally used for roadways and sidewalks; uses sodium gas.
High-Pressure-Sodium (HPS)
311
Building with fire alarm and suppression system.
Intelligent Building
312
In a lightning protection system; the combination of a metal rod and its brace or footing; on the upper part of a structure.
Air Terminal
