[owl]

I'm working homework for apprentice school. The question (statement) is:

Name all appliances required to be on a separate circuit.

This is a residential wiring class. On a job that I was on, we ran dedicated circuits for everything except the dishwasher and garbage disposal, which were together. I am reading Article 422, but it doesn't list appliances specifically. Can someone give me a code reference that lists which appliances require a separate circuit? Thanks.

 

[HARRY304E]

I'm working homework for apprentice school. The question (statement) is:

Name all appliances required to be on a separate circuit.

This is a residential wiring class. On a job that I was on, we ran dedicated circuits for everything except the dishwasher and garbage disposal, which were together. I am reading Article 422, but it doesn't list appliances specifically. Can someone give me a code reference that lists which appliances require a separate circuit? Thanks.

Look at 210.23

 

[owl]

So basically, there isn't a list. I need to sift through all of these requirements. In school, we were told to run dedicated circuits for everything in a kitchen. The gave us this handout for doing a kitchen upgrade.

 

[HARRY304E]

So basically, there isn't a list. I need to sift through all of these requirements. In school, we were told to run dedicated circuits for everything in a kitchen. The gave us this handout for doing a kitchen upgrade.

View attachment 31597

Do you have a screen shot of the question?

 

[bkmichael65]

I would say range(exception for a separate cook top), dryer, water heater and central heating equipment. Now that I've made a list, the experts will come out and tell me how I'm wrong and what it should be

 

[HARRY304E]

Also read 210.52.

 

[owl]

 

[HARRY304E]

I would say range(exception for a separate cook top), dryer, water heater and central heating equipment. Now that I've made a list, the experts will come out and tell me how I'm wrong and what it should be

View attachment 31598

His list above looks good,just ad AC units.


I hope you post the answer they expect , so we can tell them they're wrong..:laughing:

 

[Celtic]

Why are the GP receptacles on a 20A CB [w/#12]...why not a 15A [w#14]?

 

[aftershockews]

Why are the GP receptacles on a 20A CB [w/#12]...why not a 15A [w#14]?

Depends on the region.
When I worked in Texas, #14 was never used in residential.
Here we use 14 for lighting and 12 for receptacles.

 

[bkmichael65]

Why are the GP receptacles on a 20A CB [w/#12]...why not a 15A [w#14]?

More receptacles on a circuit/fewer circuit breakers

 

[chicken steve]

I'm working homework for apprentice school. The question (statement) is:

Name all appliances required to be on a separate circuit.

This is a residential wiring class. On a job that I was on, we ran dedicated circuits for everything except the dishwasher and garbage disposal, which were together. I am reading Article 422, but it doesn't list appliances specifically. Can someone give me a code reference that lists which appliances require a separate circuit? Thanks.

Your answer is in pursuing the size of each individual appliance, and then doing the 'fixed appliance' math Owl

from the hip (yes i'm lazy) a fixed appliance is required to have a branch circuit capable of providing not less than 50% of it's nameplate rating


i'm sure someone less lazy will ref 'fixed appliance' , but to be honest we rarely get the appliance lowdown @ rough, so we simply figure circuit dedication , as most manufactuers don't wish to blow the 20A norm



~CS~

 

[Celtic]

More receptacles on a circuit/fewer circuit breakers

?

How does a 20A ckt allow to place more recept. on a that circuit?

 

[Celtic]

Depends on the region.
When I worked in Texas, #14 was never used in residential.
Here we use 14 for lighting and 12 for receptacles.

I know that...you know that..many of us know that....


BUT...

I wanted to see it the OP knew that.

 

[chicken steve]

commercially?

~CS~

 

[Celtic]

This is a residential wiring class.

commercially?
~CS~

:no:

...

 

[owl]

I know that...you know that..many of us know that....

BUT...

I wanted to see it the OP knew that.

Here, we use #12 for the kitchen countertop receptacles. Is #12 required for kitchen receps that aren't countertop. Those can be 15A, correct?

 

[Celtic]

here, we use #12 for the kitchen countertop receptacles. Is #12 required for kitchen receps that aren't countertop. Those can be 15a, correct?

210.52

 

[owl]

Your answer is in pursuing the size of each individual appliance, and then doing the 'fixed appliance' math Owl

from the hip (yes i'm lazy) a fixed appliance is required to have a branch circuit capable of providing not less than 50% of it's nameplate rating

i'm sure someone less lazy will ref 'fixed appliance' , but to be honest we rarely get the appliance lowdown @ rough, so we simply figure circuit dedication , as most manufactuers don't wish to blow the 20A norm

~CS~

Re: not knowing appliance specs in advance

Jobs I have been on put the refrigerator on a 20A line. How common is it to put them on a 15 A line [210.52(B)(1) exception 2]? I see refrigerators = 725 W at most, so I have no idea why they would go on a 20A circuit.

 

[Celtic]

Re: not knowing appliance specs in advance

Jobs I have been on put the refrigerator on a 20A line. How common is it to put them on a 15 A line [210.52(B)(1) exception 2]? I see refrigerators = 725 W at most, so I have no idea why they would go on a 20A circuit.

A few years ago....a debate raged and flamed on about refrigerators and 15 or 20 OCPDs.

I personally looked at every residential unit Sub Zero had on their website...non called for anything more than a 15A CB.

Things may have changed in the refrigerator department from then until now.....but I doubt it changed the electrical requirements.