Cooking Appliance Test Question

[dtrynne]

An electric counter-mounted cooking unit and small wall-mounted oven are tapped from a 50 amp branch
circuit. The small wall-mounted oven is rated 15 amps, the counter-mounted cooking unit is rated 25 amps. The
minimum size tap conductors to each appliance are:
A: #14 to the oven; #12 to the cook top
B: #12 to the oven; #14 to the cook top
C: #10 to the oven; #12 to the cook top
D: #10 to the oven; #8 to the cook top

Obviously from the sizes in the answers it has to be A or D, I think 210.19(3) applies but I can't decide which is more correct

 

[Bob NH]

I assume that the OCPD small conductor limits of 240.4(D) don't apply to tap conductors. Therefore, #14 with ampacity of 20 amps (Table 310.16) meets the minimum requirement for the oven, and #12 with ampacity of 25 in the same table meets the minimum requirement for the cooktop.

That leads you to A for the answer.

D is clearly overkill for the minimum.

That doesn't mean that I would install 14 and 12 for those circuits. I would probably put in at least 12 and 10, but those answers aren't among the choices.

 

[dtrynne]

That seemed the logical choice but 210.19(A)(3)Ex1 requires a 20 amp circuit so I thought that ruled out that answer, but checking 240.4(D) again I see 240.4(E) makes it acceptable for tap conductors.
Thanks for the help.

 

[finhead]

I think the answer is "D" because of Section 210.19 (A) (3) Ex 1

A 50 amp branch circuit requires tap conductors with an ampacity of not less than 20 amps

 

[finhead]

Is is too late to change my mind?

I'm going with "C"

It's an excellent question.