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Thread: convert watts to amps

  1. Back To Top    #1

    Join Date
    Jul 2008
    Location
    Flintstone, GA USA
    Posts
    112

    convert watts to amps

    My timer keeps throwing the breaker.

    I probably have something wired wrong but I need to know this:

    My digital timer specs just says 6 W Max. The timer can either run 220v or 110v. I have it wired 220.

    I need to know how many amps the timer is pulling in both 110 volt and 220 volt.

    Can anyone give me this info.

    My times is a Intermatic digital P1353 which I purchased 8/9/2012 so if something is wrong with the timer than I want to get it replaced before the 1 year warranty runs out.

    I have pump and cleaner wired 220 and I know the amps of the pump which is 5.9 in 220 V.
    I don't know the amps the cleaner pump is pulling but it is a Polaris 75 HP and everything is wired with #12 G wire.
    I have a 20 AMP GFI breaker on the main breaker serving the pool.

    Thanks
    Tom

    Tom
    Tom

    18 x 36 Grecian Polynesian Fiberglass Walls with Concrete bottom - 3 ft to 9 1/2 ft. deep -
    Hayward Variable Speed Super Pump SP2600VS 1 1/2 True HP,Hayward sand filter S200, and Hayward auto clorinator. Hayward 250,000 natural gas heater. PoolKeeper automatic water leveler. Loop Loc Ultra Solid Safety Cover. Hayward Color Logic 12 volt light. Dual Pool Deck Jets.
    Polaris 380 auto cleaner. Trouble Free Test Kit TF-100.

  2. Back To Top    #2
    JasonLion's Avatar
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    May 2007
    Location
    Silver Spring, MD
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    37,879

    Re: convert watts to amps

    6 watts at 220 volts is 0.027 amps. The timer isn't going to have anything to do with the breaker tripping unless it is very broken.

    Keep in mind that pumps have very high peak startup currents, often larger than their specified max amps. If you are trying to start the main pump and the booster pump at the same time on a single circuit breaker there are likely to be problems, though it might work fine depending on various details.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    Join Date
    Jun 2007
    Location
    New Jersey
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    653

    Re: convert watts to amps

    That 6W is the consumption of the timer/clock function itself. That puppy will control up to 3HP on each of three circuits. It is plenty big. Per the manual:

    http://www.intermatic.com/~/media/In...s/P1353ME.ashx

    I doubt your issue is the timer. As Jason said, staggering the on-times is a must.

    How old is the breaker? They sometimes go bad.

    It would be helpful to try various set-ups to see what equipment causes the trip. Does it trip on start-up of one item or in the middle of a run? What happens if you only run each piece separately? If one alone still trips the breaker you probably have a mis-wiring or defect on that circuit. If it is only both together (but not starting simultaneously), I would try replacing the breaker.

    Another idea: as a test, with no one in the pool area, try a non-GFCI breaker (if you are capable of that) to determine if the issue is overcurrent or just a leakage to ground.

    Disclosure: I am not an electrician, but I have wired or rewired three pool systems and have been doing my own work for many years.
    Current: 28,000G 18'x36' I/G AnthonySylvan Plaster; Waterway 60 sq.ft. DE Filter; 1.0hp x 1.65 SF Two-Speed (B2982) WhisperFlo; 2004-Present
    Previous: 40,000G 20'x40' I/G Koven unlined WWII salvage 5/8" marine steel; Lomart Stainless Sand Filter; 3/4hp Hayward SuperPump; 1946-2003 (managed by me from about 1964)
    Ancient Taylor K-2000, upgraded with Taylor CH, TA, and FAS-DPD, and TFT CYA tests.

  4. Back To Top    #4

    Join Date
    Jul 2008
    Location
    Flintstone, GA USA
    Posts
    112

    Re: convert watts to amps

    This happens when the pump itself comes on. My pump only pulls 5.9 amps. Nothing else is on the line with it when it starts up.

    Also I disconnected the nutral wire and rehooked it and it seems to fix the start up problem. The only thing is last night it tripped off at about 11 PM when it was on 1000 rpm and was pulling very few volts.

    I suspect it might be the breaker. I think I will replace it with a new one to see if this solves the problem.

    I know that the breaker and timer worked fine controlling my old 1 HP Super Pump and same cleaner. If it is not the breaker then I would not be surprised if it wasn't in my wiring job.

    Tom,
    Tom

    18 x 36 Grecian Polynesian Fiberglass Walls with Concrete bottom - 3 ft to 9 1/2 ft. deep -
    Hayward Variable Speed Super Pump SP2600VS 1 1/2 True HP,Hayward sand filter S200, and Hayward auto clorinator. Hayward 250,000 natural gas heater. PoolKeeper automatic water leveler. Loop Loc Ultra Solid Safety Cover. Hayward Color Logic 12 volt light. Dual Pool Deck Jets.
    Polaris 380 auto cleaner. Trouble Free Test Kit TF-100.

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