Forum Topic

Ask Sir Tony - an Electronics/Electrical Q & A thread

  • @piLio

    yung figures A and B, me pagkakaiba yan. kung B gagamitin mo, kulang ang no. 12 wires. kasi total load is 4000 watts, around 18-20Amps. Amps capacity ng no. 12 awg is 25A. iinit ang wires mo.

    so kung no. 12 AWG, dapat figure A gagawin mo. kung figure B, dapat no. 10 awg ka.

    -- edited by PadreFlorentino on Dec 02 2017, 10:40 PM
  • Post deleted #12057950
  • @PadreFlorentino

    thanks sir, Figure A ginawa ko, 12awg ginamit ko wire, yung source pala ay 10awg.
  • tanong ko lang po kung na papa repair ang mga Video Card?
  • Anong pwedeng alternative sa SPDT ElectroMechanical Relay, NC Reed Relay, and Depletion Mode MOSFET?

    Basically, initial state ng Load ay powered or Normally Closed. Tapos pag-nagapply ako ng 12V, open na ung circuit ng load.
  • Bakit kaya may electric shock ang RCA cables namin?
  • ^
    No grounding wire on your gear and house wiring?
  • I have no idea. The TV is powered through an extension cord.
  • ^
    TVs generally don't have a grounding wire, as they have a 2-prong power plug, compared to the 3-prong plug used in computers.
  • What can I do or buy to fix it?
  • magtsinelas?
  • Bakit kaya may electric shock ang RCA cables namin?


    normal lang na may shock sa aluminium housing ang mga electric components. pero pag rca cables either may naka exposed na copper wire kinagat ng daga or my pingas yung rubber insulation at naka expose yung copper wire.


    TVs generally don't have a grounding wire, as they have a 2-prong power plug, compared to the 3-prong plug used in computers.


    2 prong lang din ang ibang computer cables. some units ng psu may mga euro plug/s na included as accessories.
  • ask lang po.

    ano theory behind nung Ckt breaker? from main let say naka 60A sya, tapos distributed papunta ng mga outlets or other supply which have 20A, 30A or others.

    let say may 6 na switch ( ckt breaker) from main switch (ckt breaker) pag ni total mo yung Ampere nung mga ratings ng switches is more than 60 A. bakit di nag oover load yung main switch?
  • ask lang po.

    ano theory behind nung Ckt breaker? from main let say naka 60A sya, tapos distributed papunta ng mga outlets or other supply which have 20A, 30A or others.

    let say may 6 na switch ( ckt breaker) from main switch (ckt breaker) pag ni total mo yung Ampere nung mga ratings ng switches is more than 60 A. bakit di nag oover load yung main switch?


    Kahit sampung aircon pa na 2hp di mag-ooverload yang circuit breaker mo.
  • ^ yung concern ko po is yung main switch like 60A.

    Tapos pag inadd mo yung mga switches na naka distribute are more than 60A

    Pano kung per switch nag loload ka ng mga 30 A each tapos meron ka mga 5 switches.
  • Tulong po regarding 110 to 220v

    Timer po ito for my aquarium para mag Auto Switch On/Off ang Skimmer & CO2 ko.

    Timer details ~ 115v
    Skimmer details ~ 110v

    Kailangan ko po bang bumili ng transformer at dun i-plug ang timer? Kung OO, ano po ang transformer na hahanapin ko? Kapag naka-plug na po ba ang timer sa transformer pwede ko na po bang i-plug direct ang 110v na skimmer ko or kailangan ko pa ng 220v stepdown adaptor?

    Salamat po sa sasagot.







    -- edited by jasta01 on Dec 07 2017, 12:22 PM
  • Mag ttrip ang 60A breaker sa 10 na 2hp na aircon.

    baysil2000,

    hindi naman full load lagi ang 30A or 20A na switch mo. mababa lang ang ilaw plus mag ttrip muna ang breaker ng lights mo bago mag trip ang main kaya mahirap mag trip ang main
  • Thanks poipoy!