Page 1 of 2 12 LastLast
Results 1 to 10 of 16

Thread: 30 amp circuit for disposal/dishwasher?

  1. #1

    30 amp circuit for disposal/dishwasher?

    I was always under the impression that a shared outlet below the kitchen sink for a dishwasher and disposal was supposed to be on a 20 amp circuit.

    I have seen them on 15, 20 and now 30 amp circuits.

  2. #2
    Join Date
    Mar 2006
    Location
    Tampa Florida
    Posts
    8,009
    Quote Originally Posted by Smooth Contrails View Post
    I was always under the impression that a shared outlet below the kitchen sink for a dishwasher and disposal was supposed to be on a 20 amp circuit.

    I have seen them on 15, 20 and now 30 amp circuits.
    I would question the 30 unless name plate requires. A 20 should be able to carry both but dont forget the 50 % rule

  3. #3
    Join Date
    Oct 2006
    Location
    Litchfield, CT
    Posts
    8,622
    Quote Originally Posted by Smooth Contrails View Post
    I was always under the impression that a shared outlet below the kitchen sink for a dishwasher and disposal was supposed to be on a 20 amp circuit.

    I have seen them on 15, 20 and now 30 amp circuits.

    No, they dont need to be 20, but 30 is completely out of the question if someone is installing a 15-20 amp receptacle.
    "Electricity is actually made up of extremely tiny particles called electrons, that you cannot see with the naked eye unless you have been drinking."

  4. #4
    Join Date
    Jul 2008
    Location
    Iowa
    Posts
    453
    Quote Originally Posted by Jim W in Tampa View Post
    I would question the 30 unless name plate requires. A 20 should be able to carry both but dont forget the 50 % rule
    whats the 50% rule?

  5. #5
    Join Date
    Mar 2006
    Location
    Westchester County, New York
    Posts
    8,169
    Quote Originally Posted by stickboy1375 View Post
    No, they dont need to be 20, but 30 is completely out of the question if someone is installing a 15-20 amp receptacle.


    Where is the code section to back this up?
    Instructor, Industry Advocate

  6. #6
    Join Date
    Mar 2006
    Location
    Tampa Florida
    Posts
    8,009
    Quote Originally Posted by fireryan View Post
    whats the 50% rule?
    if either requires more than 50% then it cant be shared. Thats very unlikely on a 20

  7. #7
    Join Date
    Feb 2003
    Location
    Portage, Indiana NEC: 2008
    Posts
    9,911
    Quote Originally Posted by stickboy1375 View Post
    No, they dont need to be 20, but 30 is completely out of the question if someone is installing a 15-20 amp receptacle.
    210.21(B)(2)

    For the 50% rule:

    210.23(A)(2)
    Wayne A. From: N.W.Indiana
    Be Fair, Be Safe
    Just don't be fairly safe

  8. #8
    Join Date
    Jul 2005
    Location
    Tennessee
    Posts
    12,925
    Quote Originally Posted by Pierre C Belarge View Post
    Where is the code section to back this up?
    wouldn't 220.21 prohibit it ?
    At my age, I'm accustomed to restaurants asking me to pay in advance, but now my bank has started sending me their calendar one month at a time.

  9. #9
    Join Date
    Mar 2006
    Location
    Westchester County, New York
    Posts
    8,169
    Quote Originally Posted by augie47 View Post
    wouldn't 220.21 prohibit it ?

    I am sure you meant 210.21. :grin:

    210.21(B)(3)
    Instructor, Industry Advocate

  10. #10
    Join Date
    Jul 2003
    Location
    New Jersey
    Posts
    19,496
    Quote Originally Posted by hurk27 View Post
    For the 50% rule:

    210.23(A)(2)
    Would that apply to two fastened in place appliance?
    Rob

    Chief Moderator

    All responses based on the 2011 NEC unless otherwise noted

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •