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  • Hot Water Tank:

    Was wondering what the correct wiring is for this. Red, white, black and ground for a feed wire. Inside water tank is red black, green screw, and a green screw with a ground on it. Which goes with which. Any help would be greatly appreciated. Came home from work to change and brother had the wires disconnected already. He doesnt remember what was where. In the manul it shows black to black. Than it shows red and white as supply but doesnt show where they go.Thanks
    Last edited by newfie07; 04-30-2007, 11:59 PM.

  • #2
    Re: Hot Water Tank:

    A stanadard electric waterheater connection is very typical

    Black to Black and Red to Red and green to grounding screw on tank frame

    if you have white wire just cap it off you dont need it on 240 v electric water heater at all

    but Make sure you get correct wire size it should be #10 copper romax or uf depending on area and have 30 amp fuse or breaker to protect it.

    this figures is good for 3500- 5500 watt electric hotwater heater

    I just hope you have the fuse or breaker off on this circuit so please do it safe there

    Merci , Marc

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    • #3
      Re: Hot Water Tank:

      see your other post.

      rick
      phoebe it is

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      • #4
        Re: Hot Water Tank:

        Thanks for the help guys. Got thrown off by the white wire looking as though it was connected to a white wire on the old tank. This is what the manel shows:


        http://www.gsw-wh.com/pdfs/products/...s_standard.pdf

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        • #5
          Re: Hot Water Tank:

          I agree with Frenchy, Black to Black, Red to Red, Green to ground screw. White is basically a ground in this application and can be capped off, as long as the green is connected to the ground.
          Brent

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          • #6
            Re: Hot Water Tank:

            Thanks a bunch guys. So are you saying that the white can be connected to the ground? I'm leaving it capped off but just curious. I was looking at the water tank which of course has a diagram on it as well. And it shows 208-240v setup as being red to red and black to black, with no indication on the white wire. But in the manuel it shows red and white on the same feed as supply. Wish I hada looked at the tank earlier,lol. You guys rock!!!! Thanks now i can get some sleep.

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            • #7
              Re: Hot Water Tank:

              The White wire is not to be connected to GROUND, IT IS THE NEUTRAL WIRE, it is not a GROUND wire, even tho it is common with ground, meaning that if one takes a voltage meter, there should not be notable voltage registering between the two, wires, (green and white).

              It would be a code violation, (NEC 250-24 A 5)
              and can create an unsafe condition.

              The only location where the neutral wire and the ground/earth should be "bonded" (hooked together) is at the primary service panel.

              The NEC requires bonding of the neutral and equipment
              grounding conductor at the main service panel (NEC Article 250-24,-28)

              For the Whys of it, there are books written on the subject of grounding and bonding.

              some links to probably better explain the situation.

              http://www.mikeholt.com/technical.ph...lity%20Article

              http://www.mikeholt.com/mojonewsarch...t~20041207.php

              http://ecmweb.com/nec/code_top50nec_092506/
              Last edited by BHD; 05-01-2007, 10:40 AM.
              Push sticks/blocks Save Fingers
              ~~~~~~~~~~~~~~~~~~~
              "The true measure of a man is how he treats someone who can do him absolutely no good."
              attributed to Samuel Johnson
              ~~~~~~~~~~~~~~~~~~~
              PUBLIC NOTICE: Due to recent budget cuts, the rising cost of electricity, gas, and oil...plus the current state of the economy............the light at the end of the tunnel, has been turned off.

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              • #8
                Re: Hot Water Tank:

                YOUR heater apparently is a 220/240 volt single phase heater, (with red and black) and it should be listed on the label or tag.

                ~~~~~~~~~~~~~~

                The white wire is used with systems that have one wire in common with the ground, 120 volt systems and 277 volt systems, have one wire, the white wire at some point in common with the ground, (yes it does carry electricity).

                120 volt is derived from either a 240 single phase system or a 208 three phase WYE system, and the 277 is from a 480 three phase WYE system, and is used in industrial applications.

                this url is for a surge protector, but it shows a very basic wiring diagram as if it is from the transformer, (it might help you to see the differences).

                http://www.intermatic.com/images/ins...H%20Series.pdf
                Push sticks/blocks Save Fingers
                ~~~~~~~~~~~~~~~~~~~
                "The true measure of a man is how he treats someone who can do him absolutely no good."
                attributed to Samuel Johnson
                ~~~~~~~~~~~~~~~~~~~
                PUBLIC NOTICE: Due to recent budget cuts, the rising cost of electricity, gas, and oil...plus the current state of the economy............the light at the end of the tunnel, has been turned off.

                Comment


                • #9
                  Re: Hot Water Tank:

                  Normally A hot water heater is wired with a 2 wire cable (10/2 NM, UF, etc. )(Black, white and a bare ground conductor. The water heater usually has a Black and Red conductor)The bare ground goes to the green screw. The black and the white are both 110 volt "hot" conductors (the white should be painted or taped black to indicate "hot" -- but in most cases is not). In this case it is wired BLK to BLK, WHT(painted) to RED. Since your supply cable is a three wire I suggest you test to find the two hot leads and connect those to the water heater. If the white is connected to the neutral bar in the panel, I suggest you disconnect and insulate it.

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