Philippine Electrical Code (Subject 3) - Nth

1. The cross-sectional area of three or more THW conductors in

a conduit must not exceed what percent of the cross-sectional area

of the conduit?

• 30%

• 40%

• 50%

• 60%

2. What is the minimum size THW copper conductor that may be used on a 30-ampere branch circuit?

• No. 14 AWG

• No. 12 AWG

• No. 10 AWG

• No. 8 AWG

3. Heavy-duty type lampholders are required on branch-circuits having a rating in excess of:

• 20 amperes

• 30 amperes

• 40 amperes

• 15 amperes

4. What is the maximum continuous load (in amperes) that can be used on a 240-volt, 20- ampere circuit using two No. 12 AWG conductors with THW insulation?

• 12 amperes

• 15 amperes

• 16 amperes

• 20 amperes

5. A 30-ampere branch circuit may supply fixed lighting units in:

• A dwelling

• Any occupancy other than dwelling units when heavy-duty lampholders are used

• Any type of occupancy

• Any occupancy other than dwelling units when standard-duty lampholders are used

6. Branch circuits in two-family or multifamily dwellings required for the purpose of central lighting, central alarm,  signal, communications, or other needs for public or commercial areas shall:

• Be rated over 30 amperes for any application or purpose

• Terminate in one of the dwelling unit’s panelbaord

• Be rated over 50 amperes

• Not be supplied from a dwelling unit’s panelboard

7. EMT must be supported within what distance from an outlet box, junction box, device box, cabinet, conduit body or other terminations?

• 3 feet

• 4 feet

• 5 feet

• 6 feet

8. All 125-volt, single-phase, 15- or 20-ampere receptacle outlets installed in bathrooms of dwelling units always require:

• Twist-lock receptacles

• Ground-fault circuit-interrupter (GFCI) protection

• Non-grounded receptacles

• Waterproof receptacle covers

9. The NEC allows wall-switch controlled receptacles in dwelling units in lieu of lighting outlets in all habitable rooms except:

• Basement and attic

• Living and family rooms

• Bedrooms

• Kitchen and bath

10. Insulated conductors of No. 6 or smaller intended for use as grounded conductors in a circuit must be either of the following colors:

• Blue or black

• Red or black

• White, gray or have three continuous white stripes on other than green insulation

• Orange or yellow