PEC Provisions in Installing Electrical Boxes-EIM 12 Quiz

What is the primary purpose of an electrical box in a wiring system?

• Prevent electrical theft

• Enclose wire splices and protect connections

• Act as a circuit breaker

• Support lighting fixtures

According to the PEC, electrical boxes must be installed so that the front edge is no more than how far from the finished surface?

• 1 mm

• 3 mm

• 6 mm

• Flush with the surface

Which type of box is used for mounting switches or outlets?

• Junction box

• Pull box

• Utility box

• Panel box

Boxes must be securely fastened to the building structure unless they are:

• Made of plastic

• Concealed

• Part of a raceway system

• Supported by the raceway

What is the minimum free space required inside a box for each insulated conductor entering it?

• 25 mm

• 100 mm

• 150 mm

• 300 mm

What is the minimum length of free conductor required at every outlet box?

• 75 mm

• 100 mm

• 150 mm

• 200 mm

Which of the following is NOT a function of a junction box?

• Joining wires

• Protecting splices

• Housing outlets

• Allowing future access

When installing boxes in damp or wet locations, what type must be used?

• PVC boxes

• Weatherproof boxes

• Metal boxes

• Any type with paint

What determines the required box size?

• Number of boxes in one area

• Size of wall opening

• Number and size of conductors

• Type of circuit breaker

How many 2.0 mm² wires are allowed in a standard 2" x 4" utility box (based on box fill calculations)?

• 3

• 5

• 6

• 8