Worksheet No. 2 in EE-PC 4113
14. The parallel conductors in each phase or neutral shall
.
I. Have the same insulation type and conductor material
II. Be the same size in CMA
III. Be the same length and be terminated at the same manner
a. II only
b. II only
c. III only
d. I, II, and III
Reference/Explanation:
According to www.ecmag.com/section/codes-standards/conductors-connected-parallel-eachset-must-have-same-electrical-characteristics. stated that
“All of the paralleled conductors in each phase, neutral or grounded set must be the same length and be made
from the same conductor material. They must be the same circular mil area and have the same type of
insulation.”
15. In computing the load of fluorescent fixtures, the computation shall be based on the
of the
fixture.
a. Wattage of the ballast b. wattage of the lamps c. total ampere rating d. none of these
Reference/Explanation:
According to (American Electricians Handbook 3-37). Section 220-4(b) Inductive Lighting Loads.
"For circuits supplying lighting units that have ballasts, transformers, or auto-transformers, the
computed load shall be based on the total ampere ratings of such units and not on the total watts of
the lamps."
16. In a recreational vehicle park, tent sites equipped with only 20 ampere supply facilities shall be
calculated on the basis of
per site.
a. 180 va
b.300 va
c.360va
d.600va
Reference/Explanation:
According to National Electrical Code 2020 of Illinois 551.73 Calculated Load stated “Electrical
services and feeders shall be calculated on the basis of not less than 12,000 volt-amperes per site
equipped with 50-ampere, 208Y/120 or 120/240-volt supply facilities; 3600 volt-amperes per site
equipped with both 20-ampere and 30-ampere supply facilities; 2400 volt-amperes per site equipped with
only 20-ampere supply facilities; and 600 volt-amperes per site equipped with only 20-ampere supply
facilities that are dedicated to tent sites.”
17. Where GFCI protection is located in the power supply cord for an outdoor portable sign, the GFCI
shall be located within inches of the attachment plug.
a.150mm
b.300 mm
c.450mm
d.600mm
References/Explanation:
According to “Article 422. Section 422.5 Ground-Fault Circuit-Interrupter
(GFCI) Protection For Personnel. The GFCI shall be readily accessible, listed, and located in
one or more of the following locations: Within the supply cord not more than 300 mm (12 in.)
from the attachment plug
18. A fixed electric space heater without a motor is installed in a multi-family dwelling. The heater has
no supplementary over current protection. The heater is controlled with a thermostat which does not
have a marked “off” position. The branch circuits switch or circuit breaker is not within sight from
the heater. For the, the switch or the breaker must
.
a. Be readily accessible b. not control amps or other appliances c. be capable of being locked in the open
position d. be located within the dwelling unit or in the same floor as the heater
Reference/Explanation:
According to ARTICLE 424 - Fixed Electric Space-Heating Equipment Part III. Control and Protection
of Fixed Electric Space Heating Equipment “Multifamily Dwellings. In multifamily dwellings, the other
disconnecting means shall be within the dwelling unit, or on the same floor as the dwelling unit in which the
fixed heater is installed”.
19. A metal underground water pipe is used as a grounding electrode and used to bond other electrodes
together. The grounding electrode conductor is connected to the water pipe on the interior of the
building. The connection of the grounding conductor to the interior water pipe shall be made a
maximum of
meter(s) from the point where the water pipe enters the building.
a.1
b.1.5
c.2.4
d.3
References/Explanation:
According to 250.68(C) Grounding Electrode Conductor Connections.(1) Interior metal water
piping that is electrically continuous with a metal underground water pipe electrode and is located not
more than 1.52 m (5 ft) from the point of entrance to the building shall be permitted to extend the
connection to an electrode(s). Interior metal water piping located more than 1.52 m (5 ft) from the point
of entrance to the building shall not be used as a conductor to interconnect electrodes of the grounding
electrode system.
a. No grounded interior wiring shall be electrically connected to a supply system unless the
supply system contains a corresponding conductor which is
.
b. Shielded
b. bonded
c. grounded
d. low –voltage
References/Explanation:
According to Philippine Electrical Code Section 2.0.1.3: Connection to Ground System
“Premises wiring shall not be electrically connected to a supply system unless the latter contains, for any
grounded conductor of the interior system, a corresponding conductor that is grounded.”
20. All splices, joints and free ends of conductors are required to be covered with an insulation
the conductor.
a. As thick as
b. equivalent
c. thicker than
d. larger than
References/Explanation:
According to 110.14 Electrical Connections. “(B) Splices. Conductors shall be spliced or joined
with splicing devices identified for the use or by brazing, welding, or soldering with a fusible metal or
alloy. Soldered splices shall first be spliced or joined so as to be mechanically and electrically secure
without solder and then be soldered. All splices and joints and the free ends of conductors shall be
covered with an insulation equivalent to that of the conductors or with an insulating device identified
for the purpose.
21. Appliances fastened in place, connected to branch circuits with other load shall not exceed
percent of the branch circuit rating.
a. 40
b.50
c.70
d.80
References/Explanation:
According to 210.23(A)(1)&(2) Permissible Loads, Multiple-Outlet Branch Circuits.
The total rating of all utilization equipment that is fastened in place (other than luminaires) is not permitted to
exceed 50% of the rating of a branch circuit that also supplies lighting and or receptacle outlets for other loads.
22. Multi outlet assembly may be used
.
a. Where concealed
b. in storage battery room
c. dry locations
d. in hoist ways
References/Explanation:
According to National Electric Code: 380-Multioutlet Assembly 380.1 Scope. This article covers the use
and installation requirements for multi outlet assemblies. 380.2 Use.(A) Permitted. The use of a multi outlet
assembly shall be permitted in dry locations.
23. A multi wire branch–circuit may supply
.
a. 120/240v to only one utilization equipment
b. 120/240v where all undergrounded conductors are opened simultaneously
c. Both(a)and(b)
d. Neither(a) nor(b)
References/Explanation:
According to NEC Article 100, a multi wire branch circuit consists of two or more
ungrounded conductors that have a voltage between them, and a grounded conductor that has
equal voltage between it and each ungrounded conductor of the circuit and that is connected to
the neutral or grounded conductor of the system.
24. Which of the following is not required on a motor nameplate?
a. Watts
b. horse power c. manufacturer’s identification
d. voltage
References/Explanation:
The most relevant information of a motor should be recorded on the nameplate, which
includes frame size, voltage, power, speed/rpm, and efficiency. To specify a replacement motor or
understand the requirements of a repair or rewind, several attributes need to be established.