How to Perform Calculation for Multiple Motor Installation Based on PEC

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  • เผยแพร่เมื่อ 24 พ.ย. 2024

ความคิดเห็น • 75

  • @Sak-en_Na
    @Sak-en_Na 23 วันที่ผ่านมา

    Wow! That was very nice explanation with cited reference to PEC ...... Thank you for sharing, it clearly showed na incomplete yong turo sa amin sa Tesda; EIM NC 3

  • @jaimeutlang4705
    @jaimeutlang4705 ปีที่แล้ว

    Salamat engr randy husay mo mag explain may natutunan ako salamat

  • @sleepingmind8730
    @sleepingmind8730 3 ปีที่แล้ว

    Salamat sir Laking tulong po ng mga videos niyo po

  • @BobbyBandilla
    @BobbyBandilla 2 หลายเดือนก่อน

    Salamat sir

  • @MasterJOtv3635
    @MasterJOtv3635 3 ปีที่แล้ว +1

    Yoown thank you Engineerr sa shout Out!.. dbest ka talaga..hehe galing

  • @edwardsonmartinez4585
    @edwardsonmartinez4585 4 หลายเดือนก่อน

    Thank you very much sir god bless you

    • @RandyAmorchannel
      @RandyAmorchannel  4 หลายเดือนก่อน

      You're welcome sir. God bless

  • @abdulkareemmatanog1958
    @abdulkareemmatanog1958 3 ปีที่แล้ว

    Maraming salamat sir sa turo mo napakalaking bagay parasa akin kasi 29 years na ako nagtatrabaho bilang electrician ...at may roon akung katanungan kung paanu maka take ng exam sa master electrician...sir paki sagut naman ...

    • @RandyAmorchannel
      @RandyAmorchannel  3 ปีที่แล้ว

      nandito po sa link na ito ang requirement para sa RME examination
      www.prc.gov.ph/requirements/registered-master-electrician

  • @janeskiejung7570
    @janeskiejung7570 3 ปีที่แล้ว +1

    All support sir and tamsak narin.

  • @EngrMJ-xh1jl
    @EngrMJ-xh1jl 3 ปีที่แล้ว

    Nice video Sir! 😁 thank you sa shout out! 😇 support 💪🏻

  • @reyjaynatural2462
    @reyjaynatural2462 หลายเดือนก่อน

    Good Afternoon po Sir. Salamat po sa Information. Malaking tulong po ito para sa'ming mga LEP na nakapanood ng content. Bali sir ask ko lang kung pwede makahingi soft copy ng PEC 2017 ?

    • @RandyAmorchannel
      @RandyAmorchannel  หลายเดือนก่อน +1

      no problem sir, bigay mo saken email mo send ko sau copy, hanapin ko muna sa mga files ko

  • @yurikonoha775
    @yurikonoha775 ปีที่แล้ว +1

    Pre..makikicheck..di ba yung mutiplying factor 1.1 and 1.25 provision eh..pang synchronous motor lang as shown sa table eh...yung amperes listed dun ay pang unity power factor..so kung iooperate mo ang synchronous motor..definitely mas higher ang draw out ampere as compared sa ampere @ unity power factor...So any ampere listed sa induction motor..AS IS na yung nasa table..Paki clarify nga po.

    • @RandyAmorchannel
      @RandyAmorchannel  ปีที่แล้ว +1

      Good day sir. You are correct, good observation sir. I stand corrected sir. Naglagay ako ng correction sa video description.Thank you sa pag mention. God bless.

    • @yurikonoha775
      @yurikonoha775 ปีที่แล้ว +2

      @@RandyAmorchannel okey dokey po.subacriber here....salamat po...pakiupdate na lang po..marami po tayong mga electrical engineering students na maaaring mamislead po dun sa part na yun ..somehow yung vlog nyo po eh..narerefresh yung mga theories ko nung college ako...thanks

  • @almelectromechindustries9631
    @almelectromechindustries9631 3 ปีที่แล้ว

    Kaya laging Faulty Electrical Wiring ang karamihang findings ng cause ng sunog dahil sa provision pa lang ng PEC sa motor circuit calculations in terms of sizing of conductor at OCPD ay unsafe na. 1.25 percent ang multiplier para sa size of wire pero ang pagcompute ng OCPD ay 2.25 percent. Sobrang laki masyado ng current rating ng OCPD sa allowable ampacity ng wire. Kaya nagkakasunog dahil dyan. Nasunog na ang conductor sa overloading pero hindi pa nagtitrip ang breaker. Kapag nasira ang Thermal Overload Protector ibabypas na lang lalo na kapag walang available na pamalit at pagnaglock rotor ay nagiging 300 percent or more ng FLA ang running current kaya nasusunog ang conductor dahil sobramg laki ng OCPD.

    • @RandyAmorchannel
      @RandyAmorchannel  3 ปีที่แล้ว

      Hi sir Electromech101. Hindi po mali ang PEC. ang OCPD po ay protection ng conductor against short circuit samantalang ang thermal overload relay naman ay protection ng motor against overloading. magkaiba po ang purpose nila. In case of overloading ng motor, yung TOL po ang mag poprotekta hindi po ang OCPD. At isa pa sir, ang sinasabi sa PEC tungkol sa rating ng OCPD sa table ay MAXIMUM so choice mo pa din kung gusto mo ng gamitin yung maximum o hindi. Whether gamitin mo yung maximum or hindi basta siguraduhin mo na kayang dalin yung starting current pwede din yun decision ng engineer yun sir pero walang mali sa provision ng PEC. Kung sinasabi nyo po sir na kapag nasisira ang TOL ay bina-bypass na nagiging sanhi ng pagka sunog ng conductor, wrong practice po yun, yung wrong practice po ang nanagiging sanhi ng sunog hindi po yung provision ng PEC. Kaya siguraduhin po na qualified technicicians po ang gagawa ng repair and nakakaintindi ng consequences kapag hindi ginawa ng tama ang trabaho. Dapat technically qualified licensed electrical practitioners po. Salamat sir

    • @almelectromechindustries9631
      @almelectromechindustries9631 3 ปีที่แล้ว

      @@RandyAmorchannel Hindi po lahat Sir ng gumagawa ay technically qualified licensed electrical practitioner. Mas marami pong gumagawa, kinukuhang gagawa at pinapayagang gumawa ay hindi naman mga LEP. Kaya nga binypass dahil hindi alam. At kung alam naman ay maaaring walang pamalit sa pagkakataong nasira. Kaya dapat sana LEP man o hindi ang gagawa ay maging safe sana ang provision pagdating dyan para matapos na yang Faulty Electrical Wiring. Dapat sa design pa lang po safe na. Nasa PEC din naman na may allowable ampacity ang wire. Inilagay kung ilang ampere ang allowed. Kapag nilagyan mo ng sobrang laki ang ampere capacity na OCPD base sa size ng conductor ay na violate na ang table sa PEC ng Allowable Ampacities of Conductors. 1.25 against 2.5 multiplier is 100% higher than the allowable ampacity kung saktuhan. Ang laki ng deprensya di ba? Kung short circuit ang fault ay pwedeng magtrip lalo na kung instantaneous trip ang breaker. Pero kung overload ang fault at walang overload protector ay masusunog ang wire. Bakit pa tinawag na OCPD kung sa protection lang pala para sa short circuit. Hindi naman lahat ng over current ay short circuit lang. Dapat pala Sir ang tamang tawag ay SCPD. Short Circuit Protective Device..😁😁😁

    • @RandyAmorchannel
      @RandyAmorchannel  3 ปีที่แล้ว

      @@almelectromechindustries9631 sir kapag binaypass ang TOL violation na yun sa PEC. Yun ang cause ng sunog yung unallowed or unauthorized modification. Saka sir kung titignan mo yung table sa PEC nakalagay is MAXIMUM. Hindi naman sinabi na yun lang ang allowed. Malaya kang gawing mas mababa kahit 125% ok din yun pero dapat i-consider ang starting current kaya nag allow ng 250%. Iba ang approach sa motors kasi may starting current unlike ordinary loads. Kung yung overload condition naman ang concern mo sir, may thermal overload relay tayo na kinakabit na ang rating ay 1.15*FLA so yun ang magpo-protekta sa circuit in case of overload. I suggest sir to read and comprehend the PEC dahil yung reason na sinasabi mo sir kaya nagkakasunog na bina-bypass ang TOL ay maliwanag na violation sa PEC. Hindi sir yung PEC ang mali, yung mga taong gumagawa ng violation sa PEC ang mali. Salamat sir

  • @ehendz
    @ehendz 2 ปีที่แล้ว

    Engr. Randy, new to ur channel. i am impress sa explanations mo sa mga video. May request po sana ako? Pede po pahingi ng NEC copy po :) More po and Tnx in advance!

    • @RandyAmorchannel
      @RandyAmorchannel  2 ปีที่แล้ว

      sure po send nyo po email address nyo saken mag send ako ng copy ng NEC 2017

    • @RandyAmorchannel
      @RandyAmorchannel  2 ปีที่แล้ว +1

      Download NEC 2017 from the link below:
      drive.google.com/file/d/1ImN-zXjqlg6ukcVnyIi-AqxmOllB-X7T/view?usp=sharing

  • @kotugomo4085
    @kotugomo4085 2 หลายเดือนก่อน

    Hello sir question lang po. Yun pag adjust ng conductor size after madetermine ang size Equipment Grounding ay dahil sa OCPD rating and from Table of equipment grounding. Kaso yun pagsize ng OCPD ay depende sa kung ano ang lowest available rating from catalog ng ibat ibang manufacturer ng breakers, so possible na kung may mas mababa pa sa 30A like sa sample niyo, no need mag adjust ng conductor size tama po ba.

    • @kotugomo4085
      @kotugomo4085 2 หลายเดือนก่อน

      pa up din po nito sir sorry newbie question lang

  • @markmacatuno3218
    @markmacatuno3218 8 หลายเดือนก่อน

    sir ano poba mauuna sa SLD ung disconnecting switch or ung breaker?

    • @RandyAmorchannel
      @RandyAmorchannel  8 หลายเดือนก่อน +1

      Normally mauuna ang circuit breaker dahil nakalagay ang circuit breaker sa supply side normally sa Motor Control Center (MCC) then may conductor ka papunta sa location ng motor sa field, then sa field meron kang disconnect switch which is required for isolation during maintenance. Ang disconnect switch is required na dapat ay taaw mula sa motor location. So mauuna ang circuit breaker sa feeder bago ang disconnect switch sa field.

  • @romyabolidor1916
    @romyabolidor1916 3 ปีที่แล้ว

    Hi Sir, kung CB gamitin as disconnect of branch motor i need to multiply ba ng 2.5 the TOL?

    • @RandyAmorchannel
      @RandyAmorchannel  3 ปีที่แล้ว

      Good day sir. Iba yung sizing ng TOL sa CB independent sila. Saka sir yung CB is di ginagamit sa disconnet. Pwede kang gumamit ng fused disconnect kung gusto mo pero hindi CB kasi yung CB is protection ng conductor normally nasa MCC yun pero yung disconnect is dapat in sight from location of equipment being driven by motor

  • @karlpalma9874
    @karlpalma9874 2 ปีที่แล้ว

    Sir ano po ba dapat gamiting multiplier for sizing of Circuit Breaker for VFD's? thank you.

    • @RandyAmorchannel
      @RandyAmorchannel  2 ปีที่แล้ว

      Sorry sa late reply. According to PEC 4.30.10, kailangan i-size ang OCPD ng VFD base sa manufacturer's recommendation. Kung walang recommended size ang manufacturer, ang size ng OCPD ay katulad ng sizing ng OCPD ng motor according to PEC 4.30

  • @kotugomo4085
    @kotugomo4085 2 หลายเดือนก่อน

    Additional question lang po, kailan ginagamit ang "square root of 3" sa pagcompute ng motor load cb wire etc. Diko po kasi nakita dito sa tutorial niyo. Thanks sir

    • @RandyAmorchannel
      @RandyAmorchannel  2 หลายเดือนก่อน

      @@kotugomo4085 ginagamit ang square root of 3 or 1.732 kapag ang calculation Mo is for 3phase system

    • @kotugomo4085
      @kotugomo4085 2 หลายเดือนก่อน

      ​@@RandyAmorchannelhello sir ang bilis ng response niyo. Sorry po baka namis interpret ko pala, ibig sabihin itong video ay para lang sa single phase motor sir?

    • @RandyAmorchannel
      @RandyAmorchannel  2 หลายเดือนก่อน

      @@kotugomo4085 pang 3phase Yung video sir, di nalang Tayo gumamit Ng square root of three Kasi di naman Tayo nag compute Ng current, ginamit naten Yung nameplate rating Sa FLA at table values Sa FLC

    • @kotugomo4085
      @kotugomo4085 2 หลายเดือนก่อน

      @@RandyAmorchannel thanks sir ito nalang sundan ko at malinaw po pagka explain, newbie lang din po kasi ako and di ako engineer kaya pinipilit intindihin ang mga terms. Sana magawa ko po ng tama. Salamat po ng marami sir!

  • @alfonsogabrieldehittaquint8791
    @alfonsogabrieldehittaquint8791 3 ปีที่แล้ว

    Sir based on experience po ang CB ng 22mm na wire is at 80 AT lang po at based sa PEC if THHN gagamitin mo up to 90 AT. Gusto ko lang sana iclarify if tama po talaga yung pairing ng Main CB tsaka Main feeder wire

    • @RandyAmorchannel
      @RandyAmorchannel  3 ปีที่แล้ว

      Salamat sa question mo sir. Keep in mind sir na ang sizing ng CB naten sa single motor installation is up to 250% of FLC maximum, samantalang ang conductor naman ay up to 125% lang kaya may mga times na mapapaisip talaga tayo kung tama ba o mali yung CB rating naten sa conductor. Pero whether gamitin naten yung maximum na 250% or hindi , as long as kayang dalin ng CB yung starting current wala din problema kahit itapat naten sa ampacity ng conductor, both acceptable yun. Pag dating naman sa multiple motor installation, may specific rule tayong sinusunod, at pag sinunod naten naten yung rule na yun lalabas na 100A CB yung kailangan sa example sa video. Take note din naten sir na pinapayagan ng PEC or NEC ang mas malaking CB rating than the ampacity ng conductor kasi meron naman tayong thermal overload relay. Sana naliwanagan ka sa explanation ko sir. Feel free to ask kung meron ka pang question. Salamat sir and God bless.

    • @alfonsogabrieldehittaquint8791
      @alfonsogabrieldehittaquint8791 3 ปีที่แล้ว

      Thank you sir for answering my question po naliwanagan po ako sa answer mo di ko kasi nabasa sa pec na pwede pala yung mas mataas ang cb rating sa ampacity ng conductor if may TOL relay. San po yun banda sa pec sir para mabasa ko po sana thank you po

    • @RandyAmorchannel
      @RandyAmorchannel  3 ปีที่แล้ว

      @@alfonsogabrieldehittaquint8791 For motor applications sir Article 4.30, Refrigeration and Air-conditioning Article 4.40 and for fire pump Article 6.95. Although pareparehong motorized equipment sila, iba iba sila ng requirement kaya iba iabng articles. Happy learning sir.

    • @alfonsogabrieldehittaquint8791
      @alfonsogabrieldehittaquint8791 3 ปีที่แล้ว

      @@RandyAmorchannel sir yung sa pinapayagan ng PEC ang mas malaking CB rating than ampacity ng conductor kasi merong TOL relay san po yun makikita sa PEC?

    • @RandyAmorchannel
      @RandyAmorchannel  3 ปีที่แล้ว +1

      @@alfonsogabrieldehittaquint8791 ah wala namang exact sentence na ganun pero ang sinabi sa article 4.30 is ang TOL ang mag protect sa motor against damage due to overload is yung TOL at yung OCPD naman ay protection against overcurrent dur to short circuit. So kahit mas malaki yung CB rating safe pa din yung circuit dahil sa TOL. May copy ka ba nung NEC handbook? nandun interpretation nung NEC kung wala send mo saken email send ko sau copy para mas malinawan ka sa mga provisions ng NEC dahil yung PEC naten ay naka pattern din naman sa NEC

  • @humbeym9069
    @humbeym9069 3 ปีที่แล้ว

    Sir question lang, ganyan din po ba ang computation kung ang multiple motor load ay mga AIRCON ...lahat po aircon

    • @RandyAmorchannel
      @RandyAmorchannel  3 ปีที่แล้ว

      Sir pag aircon refer to article 4.40. Normally pag aircon equipment may nakalagay sa nameplate na MOCP yun ang gagamitin mo pag size ng OCPD at maeron din MCA un naman gagamitin mo, pag size ng conductor

  • @damonyorgalvez1966
    @damonyorgalvez1966 3 ปีที่แล้ว

    Sir...good day po, ask ko lng kung ano ang gamit pa ni disconnecting means when in fact meron na tayong branch ocpd?

    • @RandyAmorchannel
      @RandyAmorchannel  3 ปีที่แล้ว +2

      Ang disconnecting means ay ginagamit for safety purposes during maintenance dapat may means para ma isolate physically yung motor power circuit at dapat ay capable of being locked in the open position para sure na habang may nag tatrabaho sa motor ay walang makakapag energize intentionally or accidentally. Thanks sa question mo at sana nasagot ko.

  • @markmacatuno3218
    @markmacatuno3218 8 หลายเดือนก่อน

    kung dipo available yung template sa pag dedesign saan po pwede ibase yung full load amperes?

    • @RandyAmorchannel
      @RandyAmorchannel  8 หลายเดือนก่อน +1

      Pwede mo hanapin yung data sheet ng motor online, halos lahat naman downloadable na ngayon. Kung wala kang makita at alam mo naman yung HP rating, operating voltage, assume mo nalang yung pf to be 0.85 and efficiency at 90% good estimate na yun then calculate mo nalang yung FLA

    • @markmacatuno3218
      @markmacatuno3218 8 หลายเดือนก่อน

      thanks sir @@RandyAmorchannel dami kopong natutunan sainyo

  • @Engr.Alberto
    @Engr.Alberto 2 หลายเดือนก่อน

    sir halimbawa po yung sa nameplate ng mga motors ay iba iba ang voltage ? yung supply po namin is 230v. paano po yun?

    • @RandyAmorchannel
      @RandyAmorchannel  2 หลายเดือนก่อน

      @@Engr.Alberto sir ano po ibig nyong sabihin na iba iba ang voltage? Kasi Kung Naka connect sila Sa commons supply tulad Ng MCC for sure dapat parepareho ang voltage nila nominal voltage example 220-240, 440-480

    • @Engr.Alberto
      @Engr.Alberto 2 หลายเดือนก่อน

      @@RandyAmorchannel i mean sa name plate nila may 200v, 220, 270v

    • @Engr.Alberto
      @Engr.Alberto 2 หลายเดือนก่อน

      @@RandyAmorchannel gagawa po kasi ako ng bago nilang ocpd tsaka disconnecting means which kailangan ng meralco with signed by PEE

    • @Engr.Alberto
      @Engr.Alberto 2 หลายเดือนก่อน

      ​@@RandyAmorchannel tsaka sir pag 220v sa name plate 230v naba gamitin sa table

    • @Engr.Alberto
      @Engr.Alberto 2 หลายเดือนก่อน +1

      ​@@RandyAmorchannel sorry sir sa maraming tanong, baguhan lang po sa industry. wala po kasing mentor na engineer. dalawa lang kami yung isa civil pa

  • @ironfist4541
    @ironfist4541 2 ปีที่แล้ว

    Paano po kung 7 pcs n pareho ang size ng breaker...isa lang po ba ang kukunin na size para makuha ang main feeder pati main breaker? Tnx

    • @RandyAmorchannel
      @RandyAmorchannel  2 ปีที่แล้ว

      Kung 7 pcs na same size ang breaker, isa lang gagamitin na highest rated OCPD + sum of all the FLC ng other motors para sa main OCPD, at isa lang din sa kanila ang gagamitin sa 1.25 x highest FLC + sum of FLC of all other motors

    • @ironfist4541
      @ironfist4541 2 ปีที่แล้ว

      @@RandyAmorchannel tnx boss...aircon kasi yan parehas lang hp nila...same din ung flc nila

    • @RandyAmorchannel
      @RandyAmorchannel  2 ปีที่แล้ว

      @@ironfist4541 sir kung Aircon ang loads dapat section 4.40 ng PEC ang gagamitin hindi 4.30

    • @ironfist4541
      @ironfist4541 2 ปีที่แล้ว

      @@RandyAmorchannel Anu po nakalagay sa section 4:40 sir cencia na wla kasi pec...tnx

    • @RandyAmorchannel
      @RandyAmorchannel  2 ปีที่แล้ว

      @@ironfist4541 Section 4.40 ang section s PEC pertaining airconditioning and refrigeration equipment

  • @johnreymaliao3352
    @johnreymaliao3352 ปีที่แล้ว

    Sir pwd poh ba ako makahingi ng PEC at NEC copy..

    • @RandyAmorchannel
      @RandyAmorchannel  ปีที่แล้ว

      sige sir mamaya pag uwi i-upload ko sa github account send ko sau link.

    • @johnreymaliao3352
      @johnreymaliao3352 ปีที่แล้ว

      @@RandyAmorchannel sir meron na poh...
      Salamat...

  • @androb.
    @androb. 3 หลายเดือนก่อน

    Sa akin lang ba Blur tingnan Ang video.

    • @RandyAmorchannel
      @RandyAmorchannel  3 หลายเดือนก่อน

      @@androb. Sir malinaw po Yung video full HD po Yan. Baka po Sa settings po select nyo po HD. Thanks.

    • @androb.
      @androb. 3 หลายเดือนก่อน

      @@RandyAmorchannel cge sir Malabo ksi sa akin.

  • @ardeepulgares8695
    @ardeepulgares8695 3 ปีที่แล้ว

    E