Results 1 to 5 of 5

Thread: Branch Circuit Requirements- 120v 20amp DWELLING

  1. #1
    Join Date
    Apr 2018
    Location
    Maple Lake, MN, USA
    Posts
    5

    Branch Circuit Requirements- 120v 20amp DWELLING

    Hello,

    As I was doing service factor calculations for a dwelling and figuring for what I thought was 3 general 120v 20 amp circuits (2 small appliance, 1 laundry) @ 1500VA each I got confused with how many general 120v 20 amps circuits required by the NEC. The 2017 code requires for garages to be supplied by 1- 120v 20 amp circuit and what about bathrooms??

    So how many 120volt 20 amp circuits are required in a dwelling as of the 2017 code?

    Thanks

  2. #2
    Join Date
    Dec 2006
    Location
    Chapel Hill, NC
    Posts
    33,437
    I don't think a garage can count as many homes don't have them. That being said the minimum would be one for laundry, 2 small appliance branch circuit, one bathroom & one for the laundry.

    Now for calculation purpose, the bathroom 20 amp circuit gets counted in the standard 3 watts/ft squared. If there was a garage then that would not be counted in the calculation either
    They say I shot a man named Gray and took his wife to Italy
    She inherited a million bucks and when she died it came to me
    I can't help it if I'm lucky



  3. #3
    Join Date
    Dec 2006
    Location
    Chapel Hill, NC
    Posts
    33,437
    This may help

    220.14(J) Dwelling Occupancies. In one-family, two-family, and
    multifamily dwellings and in guest rooms or guest suites of
    hotels and motels, the outlets specified in (J)(1), (J)(2), and
    (J)(3) are included in the general lighting load calculations of
    220.12. No additional load calculations shall be required for
    such outlets.
    (1) All general-use receptacle outlets of 20-ampere rating or
    less, including receptacles connected to the circuits in
    210.11(C)(3)
    (2) The receptacle outlets specified in 210.52(E) and (G)
    (3) The lighting outlets specified in 210.70(A) and (B)
    They say I shot a man named Gray and took his wife to Italy
    She inherited a million bucks and when she died it came to me
    I can't help it if I'm lucky



  4. #4
    Join Date
    May 2005
    Location
    Richmond, Virginia
    Posts
    23,198
    Quote Originally Posted by Dennis Alwon View Post
    That being said the minimum would be one for laundry, 2 small appliance branch circuit, one bathroom & one for the laundry.
    May I presume you didn't intend to say laundry twice?
    Code references based on 2005 NEC
    Larry B. Fine
    Master Electrician
    Electrical Contractor
    Richmond, VA

  5. #5
    Join Date
    Dec 2006
    Location
    Chapel Hill, NC
    Posts
    33,437
    Quote Originally Posted by LarryFine View Post
    May I presume you didn't intend to say laundry twice?
    You are correct Dr. Livingston. Somehow Dr. Livingston popped into my head-- The moody blues - words from the song-

    Dr. Livingston I presume
    Stepping out of the jungle gloom
    Into the midday sun.
    They say I shot a man named Gray and took his wife to Italy
    She inherited a million bucks and when she died it came to me
    I can't help it if I'm lucky



Posting Permissions

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