Results 1 to 7 of 7

Thread: can this switch handle my inverter???

  1. #1
    DJ
    DJ is offline
    Low Bitrate
    Join Date
    May 2000
    Location
    Edgerton, Ohio 43517
    Posts
    91

    Question can this switch handle my inverter???

    Yo.

    I have a "Heavy duty rocker switch" from Radio Shack. It has SPST contacts rated 6A at 125VAC. I want to turn my 160W power inverter off/on with it.
    My dad said that a standard house light switch would be much safer...

    Can i use this Radio Shack switch???

    - - Thanks guys! - -

    dj

  2. #2
    Variable Bitrate
    Join Date
    Sep 1999
    Location
    Yarmouth NS, Canada
    Posts
    336

    Post

    If you are going to hook the switch up on the end that plugs into the lighter, you are going to need a 12VDC switch.. I used a 30Amp one but that is a bit overkill since there is a 15amp fuse in the car's fusebox that the power comes from anyway..
    MP3 Cavalier - http://www.mp3cavalier.com
    MP3 Grand Prix - http://www.mp3gp.com

  3. #3
    DJ
    DJ is offline
    Low Bitrate
    Join Date
    May 2000
    Location
    Edgerton, Ohio 43517
    Posts
    91

    Post

    Well, i was thinking of just opening the inverter and soldering the wires that are hooked to the existing switch, to my new switch, using 14 guage cable.

    dj

  4. #4
    Variable Bitrate
    Join Date
    Sep 1999
    Location
    Yarmouth NS, Canada
    Posts
    336

    Post

    I bought a lighter socket from radio shack which had two leads coming of off it.. soldered my switch inline along with a fuse and hooked it to my fuse panel directly.. Found it was easier to put a switch on the DC line.. and it didnt require doing anything permanent to the inverter.
    MP3 Cavalier - http://www.mp3cavalier.com
    MP3 Grand Prix - http://www.mp3gp.com

  5. #5
    Maximum Bitrate
    Join Date
    Dec 1999
    Location
    Buena Park, CA
    Posts
    468

    Post

    Remember that power in watts=voltage x amperage. A switch rated for 6a at 125v will pass 750 watts. Knowing that, we can find out how much amperage the switch will carry at 12v. Take 750 and divide by 12 to get 62.5a. This switch is more than enough for any automotive application, and in my experience, there is no difference between a DC switch and an AC switch.
    I used to have a SPDT switch for a head unit in an old car of mine. This allowed me to use the key to turn the head unit on and off for normal operation. Throwing the switch powered it up without the key for when I wanted to listen when I wasn't driving.
    KG6OQD
    www.americansandassociation.org

  6. #6
    Raw Wave Rob Withey's Avatar
    Join Date
    Apr 2000
    Location
    Bedfordshire, UK
    Posts
    2,139

    Post

    I disagree. Voltage has to do with the contact spacing, etc so you don't get arcing. Current has to do with the thickness of the contacts. 150W at 12V is over 10A. I wouldn't go there if I were you.

    Rob


    ------------------
    -- <A HREF="http://www.nav.to/robwithey" TARGET=_blank>http://www.nav.to/robwithey
    </A>
    Old Systems retired due to new car
    New system at design/prototype stage on BeagleBoard.

  7. #7
    Newbie
    Join Date
    Jul 2000
    Location
    Shepparton Victora Australia
    Posts
    4

    Thumbs down

    Originally posted by AVGeek:
    This switch is more than enough for any automotive application, and in my experience, there is no difference between a DC switch and an AC switch.
    Wrong! There is a huge difference, and you can NEVER assume a 10 amp AC switch will handle 10 amps DC. Here's why..

    When you open a switch and disconnect the load from the current source, an arc will build up between the opening contacts. This is not a problem for AC, because the arc will be extinguished when the voltage is zero. (ie Alternating Current). Therefore, the contacts of the AC switch will be much closer together .. close enough (in some cases) for a DC arc to be maintained across these contacts.

    Okay, so I'm talking about mains voltage here, but an AC switch handling high DC currents won't last very long!

    There is a difference between AC and DC switches ..

    Happy mp3'ing :)

Similar Threads

  1. xbox + inverter + remote start + relay switch
    By ozstriker78 in forum Power Supplies
    Replies: 10
    Last Post: 08-24-2008, 10:44 PM
  2. Capture GPS data at the flip of a switch
    By Mr. Inquisitive in forum GPS
    Replies: 4
    Last Post: 02-02-2005, 07:06 PM
  3. Voltage going through inverter switch?
    By CoCa in forum General Hardware Discussion
    Replies: 17
    Last Post: 03-29-2004, 10:57 PM
  4. odd inverter behavior
    By jshrieve in forum General Hardware Discussion
    Replies: 30
    Last Post: 04-10-2001, 05:53 AM
  5. Have to switch inverter off and on to power up pc
    By mbowler in forum General Hardware Discussion
    Replies: 10
    Last Post: 08-22-2000, 12:00 AM

Bookmarks

Posting Permissions

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