PEC Questions Part 1

Which of the following wires is not suitable tor both dry and wet locations?

• THHW

• RH

• XHHW

• TW

The equipment grounding conductor of a branch circuit shall be identified by a continuous

color.

• green

• black

• white

• yellow

Which of the following colors of insulation or mark;ng are permitted to identify "hot" phase conductors·

in conduit wiring methods?

• Black, red, and blue for 120/208-volt systems

• Yellow, orange, and brown for 277/480-volt systems

• Any colors except white, gray, or green

• AII of the above

A copper THHN feeder conductor consists of 40 amperes of continuous load and 35 amperes of non-

continuous load, and supplies a load that does not contain any general use receptacles but has three

current-carrying conductors in a raceway-with terminations rated at 75 degrees C. This means that the

minimum standard overcurrent device required for the feeder is which of the following:

• 70 amps

• 76 amps

• 86 amps

• 90 amps

For a 30 amp receptacle connected to a 30 am~ branch circuit supplying two or more outlets, the

total cord-and-plug load may not exceed which of the following sizes:

• 24 amps

• 16 amps

• 15 amps

• 12 amps

The ampacity of a conductor must be derated where the ambient temperature exceeds which of the

following:

• 30 degrees C

• 32 degrees C

• 26 degrees C

• 20 degrees C

Disregarding any exceptions, a conductor rated 56 amperes shall be protected by a fuse sized at

which of the following:·

• 60 amp

• 50 amp·

• 30 amp

• 20 amp

What is the allowable ampacity of THW insulated copper conductor with an area of 8 sq mm and

exposed to an ambient temperature of 30 C.

• 50 A

• 20 A

• 30 A

• 60 A

What is the ampacity of 5.5 sq mm. TW copper conductor?

• 35

• 40

• 45

• 30

Which one is a standard rating of a fvse or CB?

• 140 A

• 130 A

• 120 A

• 110 A