3/4 HP Bridgeport electrical question
Close
Login to Your Account
Results 1 to 5 of 5
  1. #1
    Join Date
    Dec 2013
    Country
    UNITED STATES
    State/Province
    New York
    Posts
    80
    Post Thanks / Like
    Likes (Given)
    46
    Likes (Received)
    4

    Default 3/4 HP Bridgeport electrical question

    Do you know if this Bridgeport is single phase or 3 phase? The motor says single but the plug looks like it's 3 phase. There's no vfd or anything on it, just a junction box to the power feed. I read that Bridgeport made some 3/4 HP models that were single phase. I was thinking this was one of them, but the plug threw me off. I will post photos below. I think the plug is a Non-NEMA Four-Blade Turn-Lock Connector, Non-Grounded, 120V AC/208V AC, 20A

    Thanks

    img_4926.jpg

    img_4925.jpg

    img_4924.jpg

    img_4923.jpg

  2. #2
    Join Date
    Feb 2013
    Location
    Northern califorina, usa
    Posts
    423
    Post Thanks / Like
    Likes (Given)
    9
    Likes (Received)
    156

    Default

    It's anyone's guess about the twist lock plug, the motor is clearly 220 Volt, single phase.
    On single phase applications some times 4 pole plugs are used. two legs are hot 120/120, one leg is common and the 4th ground.
    If there was a work light or a readout on the machine that was 120volt then there would need to be a common leg to complete that circuit. the ground of course for safety.

  3. Likes j c, michiganbuck liked this post
  4. #3
    Join Date
    Dec 2013
    Country
    UNITED STATES
    State/Province
    New York
    Posts
    80
    Post Thanks / Like
    Likes (Given)
    46
    Likes (Received)
    4

    Default

    Thanks a lot. Yeah, there's a power feed, so that must be for the common. I took off that plug and put on a NEMA L14-30 plug and it's working well now off the single phase. The original 1960s power feed works perfectly too which is great.

  5. #4
    Join Date
    May 2006
    Location
    Seattle
    Posts
    2,582
    Post Thanks / Like
    Likes (Given)
    65
    Likes (Received)
    680

    Default

    Is that machine fitted with a reversing switch?

  6. #5
    Join Date
    Dec 2013
    Country
    UNITED STATES
    State/Province
    New York
    Posts
    80
    Post Thanks / Like
    Likes (Given)
    46
    Likes (Received)
    4

    Default

    Quote Originally Posted by metalmagpie View Post
    Is that machine fitted with a reversing switch?
    Yes it has a reversing switch on the top left. I haven't used reverse yet but I tried it and it works. My powerfeed just seemed to stop working today though, not sure why. The motor runs but it wont engage.


Tags for this Thread

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
  •