PEC, NEC Flashcards
The minimum size of conductors to be used for lighting purposes is _____
2.0 sq. mm
The circuit conductors between the final overcurrent device protect the circuit and the outlet(s)
Branch Circuit
Any current over the rated current of the equipment or the ampacity of a conductor. It may result from overload, short circuit, or ground fault.
Overcurrent
The minimum size of copper equipment conductor required for equipment connected to a
40A circuit is?
8.0 sq. mm
What is the maximum allowable continuous load for a branch circuit conductor?
0.8 or 80%
Which of the following is not a standard over-current protection device rating?
1500
When the temperature of the wire increases, what happens to the resistance?
resistance increases
It is the ratio of the maximum demand over the
connected load.
Demand factor
What is the color coding for the ground wire in electrical systems?
GREEN
Before starting any installation work, alteration, repair, or extension on any electrical system, what type of permit is needed?
Electrical Permit
Which type of fire extinguisher is suitable for electrical fires?
CO2 fire extinguisher
What does the term “electrical insulation” mean?
The use of protective materials to prevent electrical shocks
What PPE Category every personnel must use if the required minimum arc rating of 25 cal/cm??
Category 3
Equipment rated 1200 amperes or more shall have at least one entrance with _____ wide and _______ high.
600 mm, 2000 mm
_________ are non-current carrying conductors.
Equipment Grounding Conductors
The primary purpose of the______________ is to prevent water that runs down the service drop from getting into the service mast.
Drip loop
The Electrical Engineering Law, R.A. 7920 Section 31 (a) and (b), authorizes only PEE and REE to take charge of the sales and distribution of electrical equipment and systems requiring engineering calculations or application of engineering data.
TRUE
A non-profit organization whose goods are to establish, maintain, and operate laboratories for the investigation of materials, devices,
Industry Association.
FALSE, UNDERWRITERS LABORATORY
Section 1.1.2.1 is a provision in the PEC about the “electrical permit before the work is started”
FALSE, SECTION 1.2.1.1
PEC Table is the table used for the allowable ampacities of insulated conductors up to 2000 V, 60 deg C through 90 deg C….
TABLE 3.10.2.6(B)(16)
In a group of four motors, one motor draws 10 amperes, one draws 45 amperes, and two draws 75 amperes. What size of the conductor must be used for the feeder circuit?
224A
Three, 230 volts, 1 phase squirrel cage induction motors each drawing a current of 50 amperes are supplied by copper feeder conductors. The maximum rating of inverse time delay circuit breaker for feeder protection is _________
225A
Determine the lighting load required by PEC for a bungalow house measuring 10m x 15m. It has a total of 4500 VA loads for small appliances and laundry circuits. By applying the demand factor, what will be the total load of the dwelling unit?
LL= 3600VA ; TL=4785VA
