Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 12 of 12

Thread: I Have a Bonehead Electrical Question.

  1. Back To Top    #1

    Join Date
    Jun 2014
    Location
    Roseville, CA
    Posts
    341

    I Have a Bonehead Electrical Question.

    I notice that my salt system has three wires going in: two black and one green for 240 VAC.

    Why no white common wire(s) like in 115 VAC?
    SWG: CircuPool (May 2014) SI30+Plus; 3000ppm seems ideal;
    My Ideal Specs:
    FC 5; PH 7.4-7.6; TA 90; CH 350; CYA 75; = SI ~ 0.19
    14,000 gal, in ground, plaster, Cartridge filter, Borates
    TAYLOR K - 2006

  2. Back To Top    #2
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    9,089

    Re: I Have a Bonehead Electrical Question.

    White on a 120VAC circuit is the neutral. There is no neutral on a straight 240VAC circuit. Neutral is 120V from each of the lines on a 240V circuit, so it's only needed if you want both 120VAC and 240VAC in the same device.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  3. Back To Top    #3

    Join Date
    Jun 2014
    Location
    Roseville, CA
    Posts
    341

    Re: I Have a Bonehead Electrical Question.

    Where is the return path?
    SWG: CircuPool (May 2014) SI30+Plus; 3000ppm seems ideal;
    My Ideal Specs:
    FC 5; PH 7.4-7.6; TA 90; CH 350; CYA 75; = SI ~ 0.19
    14,000 gal, in ground, plaster, Cartridge filter, Borates
    TAYLOR K - 2006

  4. Back To Top    #4
    JoyfulNoise's Avatar
    Join Date
    May 2015
    Location
    Tucson, AZ
    Posts
    11,609

    Re: I Have a Bonehead Electrical Question.

    Well, assuming the installer/electrician did his job correctly, then in a 240V system you only need a neutral (white) wire if there is something in the box that requires a strict 120VAC power source.

    So perhaps the 240VAC wires attach to to a multi-tap transformer that supplies all of the necessary voltage levels for whatever is inside the box. Logic boards typically use 12VDC supplies (stepping down to 5V as needed) and the SWG normally needs a 24VDC power supply. AC-to-DC conversions can be done on board the control electronics for either the logic board or the cell power supply.

    Just a guess though unless you post a picture of the internal wiring layout.


    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

  5. Back To Top    #5

    Join Date
    Oct 2015
    Location
    Austin, TX
    Posts
    83

    Re: I Have a Bonehead Electrical Question.

    The two wires are 180 degrees out of phase. One pushes while the other pulls, and then the first one pulls while the other pushes.
    Pool: 16,000 gallons, 16x31, 500SqFt gunite pool, White Pebbletec interior, built by Cody Pools. Pentair Intelliflo VS-3050 pump, Pentair Clean & Clear 420 Cartridge Filter, In-line chlor with Ultra UV, PV3 Infloor cleaning, Pentair Easytouch-P4 control. TF-100
    Spa: 525 Gallons, Coast fiberglass spa of unknown vintage and suspect previous care with a 2-speed main pump and a blower motor, both 4HP. 3-step bromine sanitized.

  6. Back To Top    #6

    Join Date
    Jun 2014
    Location
    Roseville, CA
    Posts
    341

    Re: I Have a Bonehead Electrical Question.

    Thanks for that. It now makes sense!

    I'm installing a dedicated timer for my salt system, since my water solar panels keep the pump running and I can't control my chlorine generation. Opening the box reminded me of this question I'd been wanting to ask.

    Thanks again to all.
    SWG: CircuPool (May 2014) SI30+Plus; 3000ppm seems ideal;
    My Ideal Specs:
    FC 5; PH 7.4-7.6; TA 90; CH 350; CYA 75; = SI ~ 0.19
    14,000 gal, in ground, plaster, Cartridge filter, Borates
    TAYLOR K - 2006

  7. Back To Top    #7
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,998

    Re: I Have a Bonehead Electrical Question.

    I did the same thing, my SWG is on its own timer. Just make sure that the pump is always on when SWG will be on.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  8. Back To Top    #8

    TFP Guide

    Kiss4aFrog's Avatar
    Join Date
    May 2013
    Location
    Hudson, WI
    Posts
    2,602

    Re: I Have a Bonehead Electrical Question.

    Is your timer a single pole or dual ?? If single it's only opening the circuit at the timer and both wires are still HOT. One is hot to the timer and the other wire is hot to the pump and back to the timer.
    If it's dual pole then it's breaking the circuit on both wires and both of the wires leading out of the timer and to the pump are dead.

    I'd still make sure the breaker is off in either case before working on anything.
    '70s IG Vinyl 32K gal, Lazy L, Hayward SuperPump 1.5hp 120V, S240 Sand Filter W/DE
    Solar Blanket, Well Water, Borax Added, TF-100 tester. ? too cold
    1979, 275gal Conway Emerald Spa P-100-2, ES-2 Spa Pack, bromine floater, indoor
    TF-100, Best test kit - TFTestkits.net
    Please help keep the lights on, become a TFP Supporter!

  9. Back To Top    #9

    Join Date
    Jun 2014
    Location
    Roseville, CA
    Posts
    341

    Re: I Have a Bonehead Electrical Question.

    Breaker will be off.

    The pump runs a lot for the water solar, and additionally I have the flow/no flow switch for the SWG in case I set something wrong.

    I'm going to redirect the power to the new switch, then back to the SWG. The line/power descriptions are very clear for 240VAC.
    SWG: CircuPool (May 2014) SI30+Plus; 3000ppm seems ideal;
    My Ideal Specs:
    FC 5; PH 7.4-7.6; TA 90; CH 350; CYA 75; = SI ~ 0.19
    14,000 gal, in ground, plaster, Cartridge filter, Borates
    TAYLOR K - 2006

  10. Back To Top    #10

    Join Date
    Jun 2014
    Location
    Roseville, CA
    Posts
    341

    Re: I Have a Bonehead Electrical Question.

    Another question regarding L1 and L2 in a 240 VAC circuit.

    Do all L1's have to be hooked to L1's, and all L2's have to be hooked to L2's?

    For example, I have the power from the source going to the SWG timer, then down to the SWG control box. Should all the connections be L1 to L1 to L1, and L2 to L2 to L2?
    SWG: CircuPool (May 2014) SI30+Plus; 3000ppm seems ideal;
    My Ideal Specs:
    FC 5; PH 7.4-7.6; TA 90; CH 350; CYA 75; = SI ~ 0.19
    14,000 gal, in ground, plaster, Cartridge filter, Borates
    TAYLOR K - 2006

  11. Back To Top    #11

    Join Date
    Dec 2014
    Location
    Riverside California
    Posts
    473

    Re: I Have a Bonehead Electrical Question.

    Quote Originally Posted by Chuckiechan View Post
    Another question regarding L1 and L2 in a 240 VAC circuit.

    Do all L1's have to be hooked to L1's, and all L2's have to be hooked to L2's?

    For example, I have the power from the source going to the SWG timer, then down to the SWG control box. Should all the connections be L1 to L1 to L1, and L2 to L2 to L2?
    Makes no difference at all. AC connections are not polarity sensitive.
    38000 Gal, IG, Plaster, 20' x 40' x 10', Attached Raised Spa, Intelliflo VS 3 HP (011018), Pentair Quad DE 60 Filter, Raypak (Rheem) 400,000 BTU (407a low Nox), Easy Touch 8 upgrade, Screenlogic 2 with wireless, IS-4 Spa Side Remote, Stenner 45MPHP10 w/15 gal tank, Intellibrite 5g (3), Dolphin Triton Plus robot with PRO remote, Water Tech Catfish handheld vacuum for spa, TF100 with SpeedStir.

  12. Back To Top    #12

    Join Date
    Jun 2014
    Location
    Roseville, CA
    Posts
    341

    Re: I Have a Bonehead Electrical Question.

    Got. Thanks for that!
    SWG: CircuPool (May 2014) SI30+Plus; 3000ppm seems ideal;
    My Ideal Specs:
    FC 5; PH 7.4-7.6; TA 90; CH 350; CYA 75; = SI ~ 0.19
    14,000 gal, in ground, plaster, Cartridge filter, Borates
    TAYLOR K - 2006

Posting Permissions

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