Page 1 of 3 123 LastLast
Results 1 to 13 of 29
  1. #1
    Join Date
    Jan 2003
    Posts
    539
    In the panel in a house, the neutral is grounded. What if you don't ground the neutral? Will you get about 55-60 volts to ground on each leg?

  2. #2
    Join Date
    Mar 2005
    Location
    Suppy NC
    Posts
    4,513
    if you look in your panel you will find you have a ground buss bar and a neutral bar. they are two differant entaties
    if neutral isnt connected you will still have 110v to ground but not to neutral.


    there are times when working on a condenser with 220v we use cheaters and go 110 to ground so we can use our pumps or other power tools. this works but can be unsafe if someone is inside working on other circuts. even with the breaker off on the circut they are working on they can get voltage back fead on neutral

  3. #3
    Join Date
    Jun 2003
    Location
    Chicago, IL
    Posts
    4,325
    no, you will not get 55 volts if you seperate the ground and the neutral at the main. you bond the neutral to the ground in the main panel to make sure they are both at the same voltage which will be zero. also this allows a crossover point for fault current. for example, suppose a short occurs in the wiring of the house. the current flows though the ground wire and travels back to the panel at this point the current crosses over to the neutal and flows back to the transformer (since there is no ground wire coming from the transformer to the house), and allows the appropriate breaker in the panel to trip.

    [Edited by craig1 on 01-26-2006 at 09:39 PM]

  4. #4
    Join Date
    Feb 2003
    Location
    Huntsville,AL
    Posts
    4,125
    to not bond the neutral and groundING circuits at the main service panel is HAZARDOUS and illegal.

    likewise, all metallic systems must be bonded to the grounding circuit.

    harvest rainwater,make SHADE,R75/50/30= roof/wall/floor, use HVAC mastic,caulk all wall seams!

  5. #5
    Join Date
    Jul 2000
    Location
    Dallas,Texas
    Posts
    4,948
    self edit

    [Edited by wolfdog on 01-27-2006 at 08:29 AM]

  6. #6
    Join Date
    Apr 2003
    Posts
    469
    what if you don't ground the neutral?

    Then it floats as compared to ground

  7. #7
    Join Date
    Jul 2000
    Location
    Dallas,Texas
    Posts
    4,948
    Neutral is grounded {bonded) at the first disconnect of a service to establish a zero reference among other things.

    All other subpanels MUST have the neutral and ground landed at seperate and distinct bars.

    Yes, without the neutral being grounded. you get weird neutral readings to ground.

  8. #8
    Join Date
    Jun 2004
    Location
    Maryland's Eastern Shore
    Posts
    892
    Will not have zero reference and ALOT of electronic toys will not work the way they are supposed too...

  9. #9
    Join Date
    May 2001
    Location
    Kansas City
    Posts
    2,729
    The neutral is a grounded conductor. Its grounded by the Power Co. before it comes to the house. I've seen many houses with no ground at all and they still have 120v from ungrounded conductor to the neutral.

  10. #10
    Join Date
    Sep 2002
    Posts
    101
    True, it SHOULD be OK, but I wouldn't trust my life to some unknown power company tech doing things right and nothing (i.e. backhoe) changing it thereafter. FOLLOW THE NATIONAL ELECTRIC CODE AND ALL LOCAL CODES SCRUPULOUSLY!

    In reply to the original post, I have seen back feed on that order in 480V systems. It's a bit of a gut grinder to ground the connection to test it. LOTS of sparks with 480V! No sparks, it was back feed. Also, I always follow the example of our Navy veterans and hold one hand behind my back when probing a panel.

  11. #11
    Join Date
    Apr 2004
    Posts
    7,680
    Just for kicks, if you didnt ground a nuetral at the box, then it would be..... ? Well it wouldnt be nuetral. And a wire hanging in the breeze would be a potentialy hot wire and if you were to read voltage to ground it would likley show 115 v.

  12. #12
    Join Date
    Feb 2003
    Location
    Huntsville,AL
    Posts
    4,125
    1) such is hazardous
    2) such is illegial

    the neutral of residence service is the grounded center- tap of the power company's transformer.
    harvest rainwater,make SHADE,R75/50/30= roof/wall/floor, use HVAC mastic,caulk all wall seams!

  13. #13
    Join Date
    Sep 2004
    Location
    Memphis
    Posts
    2,502
    I heard a story one time about a condenser not having a ground on it. The compressor went to ground, which wasnt there. This made the outside casing energized. A boy was playing hide n seek in the backyard & hid behind it, put his hand on it & was electrocuted.

    So is this just some BS story that someone made up or would this happen if a condenser wasnt grounded???
    Life is like a jar of jalapenos. What you do today might burn your ass tomorrow.

Page 1 of 3 123 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event