Results 1 to 5 of 5

Thread: P2 change over switch diagram pg344 Sans10142-1:2020 edition 3

  1. #1
    New Member
    Join Date
    Nov 2011
    Location
    JHB
    Posts
    6
    Thanks
    0
    Thanked 1 Time in 1 Post

    P2 change over switch diagram pg344 Sans10142-1:2020 edition 3

    Hi

    Who actually installs a change over switch as per P2 change over switch diagram pg344 Sans10142-1:2020 edition 3.
    I never come across a installation like the diagram.
    I usually find the change over switch installed below the mains above the earth leakage.

    So my question is this legal? As far as i can see it still provides all the necessary protection.

    your thoughts?

  2. #2

  3. #3
    Full Member
    Join Date
    Nov 2019
    Location
    Alberton
    Posts
    67
    Thanks
    2
    Thanked 4 Times in 4 Posts
    I have installed very similar as to the SANS drawing, I did not realize it until I had a closer look, only difference on mine is, an extra changeover switch for a third section called : Non-essential. Thereby I have three split neutrals with three earth leakages.
    1.- Normal section for Eskom only-geyser, dishwasher, stove etc. (no battery backup)
    2.- Non-essential for tv’s, kettle, fridges and all small power plugs (battery backup option if battery capacity is ok, these are load-shed if battery’s are running low)
    3.- Essential for CCTV, Alarms, gate motor, Wifi, lights, 1xTV only (Always on backup)
    Very few people wire their DB’s this way but I find it very convenient and it functions very well.
    Regards Rifrug

  4. #4
    Full Member
    Join Date
    Nov 2019
    Location
    Alberton
    Posts
    67
    Thanks
    2
    Thanked 4 Times in 4 Posts
    The only unclear part is the earthing, SANS show the bonding of alternate supply earth and consumers earth. They do not show a earth spike which I would think is necessarily if you were taught that all conductors should originate from the same point. That would mean creating a alternative earth with a good earth resistance as close as possible to the generator or solar inverter and not relying on a utility earth that might be hundreds of meters away. Please correct me if I’m not seeing something as I’m always learning something.

  5. #5
    Diamond Member
    Join Date
    Apr 2010
    Location
    planet earth
    Posts
    3,943
    Thanks
    153
    Thanked 317 Times in 287 Posts
    Quote Originally Posted by melvinbrucepaton View Post
    It is exactly the same as page 359 SANS 10142-1:2017 edition 2
    Comments are based on opinion...not always facts....that's why people use an alias.

Similar Threads

  1. Change over switch for a Inverter
    By Daveleigh in forum Electrical Load Shedding Forum
    Replies: 1
    Last Post: 05-May-20, 05:11 PM
  2. SANS 10142 Edition 2
    By Karel Kriel in forum Electrical Contracting Industry Forum
    Replies: 4
    Last Post: 02-Jul-17, 08:20 AM
  3. NEW SANS10142 part 1 + NEW COC + NEW REGULATIONS REGARDING SOLAR
    By DieterT in forum Electrical Contracting Industry Forum
    Replies: 13
    Last Post: 31-Mar-17, 08:26 AM
  4. [Question] Gas hob installation and SANS10142-1 compliance
    By Lourens.dL in forum General Regulatory Compliance Forum
    Replies: 5
    Last Post: 14-May-16, 06:19 PM

Did you like this article? Share it with your favourite social network.

Did you like this article? Share it with your favourite social network.

Posting Permissions

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