Exam 20: Special-Purpose Outlets for Ranges, Counter-Mounted Cooking Unit G, and Wall-Mounted Oven F

Match the following NEMA designations with the range and dryer plug-and-receptacle types they represent. -NEMA 14-50

Calculate the overcurrent protection needed for a countertop cooking unit rated 7,450 watts, 120/240 volts. Use nameplate rating per Table 220.55, Note 4. I = W/E = 7,450/240 = 31.04 amperes

NEC 422.60(A) requires that an appliance nameplate show ____.

For electric ranges that have a computer demand of 8.75 kW or more, the neutral conductor can be reduced to not less than ____________________ percent of the branch-circuit rating but never smaller than ____________________ AWG.

According to NEC, the total load of a cord-and-plug connected range or cooktop cannot exceed ____________________ percent of the rating of the branch circuit.

A(n) ____ is NOT an acceptable disconnecting means for appliances.

Match the following NEMA designations with the range and dryer plug-and-receptacle types they represent. -NEMA 10-50

Match the following NEMA designations with the range and dryer plug-and-receptacle types they represent. -NEMA 14-30

For free-standing electric ranges, Table 220.55 permits the ____________________ load to be considerably less than the connected load.

Unit switches that have a(n) ____________________ are acceptable as the disconnecting means for that appliance.

Match the following types of range-dryer terminal and receptacle connectors with the types of conductor they are to be connected to. -white

Receptacles rated 30 amperes are referred to as ____ receptacles, and receptacles rated 50 amperes are called ____ receptacles.

NEC ____________________ states that the branch circuit overcurrent protection shall not exceed the rating marked on the appliance.

For appliances that have no marked maximum overcurrent protection, the branch-circuit overcurrent protection is sized at ____.

Match the following NEMA designations with the range and dryer plug-and-receptacle types they represent. -NEMA 10-30

On all types and ratings of receptacles, the grounding blade is ____ than the others to ensure that it makes its connection before the grounded conductors do and breaks its connection after they do (first make-last break).

A "unit switch" used as a disconnecting means for an appliance shall ____.

Match the following types of range-dryer terminal and receptacle connectors with the types of conductor they are to be connected to. -black/red

In Table 220.55, what is the rationale for allowing demand factors for electric ranges but not for wall-mounted ovens or individual counter-mounted cooking units?

Match the following types of range-dryer terminal and receptacle connectors with the types of conductor they are to be connected to. -green