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Type: Posts; User: Toros

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  1. Replies
    1$$
    Views
    246

    optional calc; 220-84

    Hi,
    I am calculating the existing service of 32-unit apartment
    using optional calc 220-84
    do I have to allow (32) x 8000VA for range and not used

    or I am allowed to demand factor it per 220-55...
  2. Replies
    0$$
    Views
    209

    apartment HSE meter size

    Hi
    I have a new 7-unit, 3-story apartment with subtranian garage.
    i want to design a 600A, 3-ph. multi gang service with a 400A, 3 ph section for house (Elevator, garage exhaust fan, ltg-power....)...
  3. Replies
    6$$
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    498

    HIGH LEG IS ONLY FOR ELEVATOR (THEY ARE ALWAYS...

    HIGH LEG IS ONLY FOR ELEVATOR (THEY ARE ALWAYS CONNECTED TO HSE)AND GARAGE EXHAUST FAN
  4. Replies
    6$$
    Views
    498

    Apartmt service-Delta

    Hi,
    i am revising the design;
    Decided to go with 1200A, 3ph. service @ 120/240V, 4W;
    Because: I heard that appliances in dwellings do not work properly @ 208v
    Deal or no deal??

    Thank you
  5. Replies
    1$$
    Views
    313

    Apartment panel calc

    Hi,
    about the calculation of sub panel in apartment,
    supplied through 120/208v, 1ph, 3wire feeder;

    should I divide total loads in volt-amp to 208v
    (example: 15000VA / 208v= 72 A)
    ????

    Thank...
  6. Replies
    25$$
    Views
    1,809

    Apartment service voltage

    Hi,
    i am providing 1200A service @ 120/208v, 3ph, 4w for a new-build 25-unit apartment.

    are you against that,
    Approved or disapproved ????
  7. Replies
    1$$
    Views
    332

    Apartment service

    Hi
    i am conducting service calc for new 24-unit apartment in LA
    i came up with 911 A demand for 24 dwelling units plus the house load of 270A (Elev. , garage fan, ltg....)

    do I need 1200A...
  8. Replies
    2$$
    Views
    414

    Separate BLdg grounding

    Hi
    my fellow Electrition
    upgraded exist service in gas station
    the new service is located outside of building at the corner of the property

    and three sub panels inside the building

    asking...
  9. Thread: EV charger load

    by Toros
    Replies
    3$$
    Views
    481

    EV charger load

    Hi
    Do we have to allow 9600 VA load for E.V charger in the load calc????

    Thank you
  10. Replies
    3$$
    Views
    355

    elevat. meter panel

    Hi
    for a new built 9-unit , 3-story apartment bldg in LA
    can we provide a commercial 200A, 240v, 3 ph, 3wire meter section adjacent to dwelling meters??

    the only house load are the elevator...
  11. Thread: grounding system

    by Toros
    Replies
    1$$
    Views
    339

    grounding system

    Hi
    we have to install the 400A service in empty lot used for parking lot
    and never had electricity there

    this is a new power request

    How can we ground the system (prim. Grd)
    when there is...
  12. Replies
    5$$
    Views
    643

    1 phase service and 3 ph. equipment

    :happysad:
    my Clients says,
    he runs 3-ph. equipment off the existing 200A 1 ph 120/240v and 100A , 1-ph. 120v (adjacent installed) services.

    by combining both

    is this true???
  13. Thread: Service capacity

    by Toros
    Replies
    1$$
    Views
    332

    Service capacity

    Hi,
    where do I find code IN NEC about allowance, maximum service capacity,
    how much load is allowed (maximum) as demand.?????/
    THANK YOU
  14. Replies
    4$$
    Views
    344

    CAD Question, re trying

    Hi
    Any body recommends
    what kind powerful , fast process desk top to buy
    for AUTO CAD use.

    Thank you:angel:
  15. Replies
    1$$
    Views
    254

    WIRE SIZE TO SERVICE

    HI
    IS (2) 3" PVC , (3) # 500 MCM GOOD ENOUGH
    FROM UTILITY XFRMER TO THE NEW 800A SERVICE
    THAT HAS TOTAL 740A OF DEMAND LOADS.

    ???????

    THANK YOU
  16. Replies
    1$$
    Views
    395

    system grounding size

    HI ,
    my fried contractor installs a system-grounding for the new 600A service;
    3/0 cu to the cold water pipe
    but we do not know what size ?????? for ground Rods


    Thank you
  17. Replies
    5$$
    Views
    591

    YES

    YES
  18. Replies
    5$$
    Views
    591

    understanding xformer

    hi
    my client has a new industrial machine operating at 480v
    and the available voltage-service in facility is 120/-240v, 4wire delta

    Can I install an xformer: 480v-240v, 3-ph in reverse ...
  19. Replies
    3$$
    Views
    426

    320A, class 320 vs 400A service

    can class-320 service used in duplex apartment

    or they are designed only for 1-family homes

    for example;
    for a duplex home/apartment a 2-gang/meter service requiring more than 200A (demand...
  20. Thread: About service

    by Toros
    Replies
    4$$
    Views
    462

    About service

    Hi ,
    wondering,
    if the utility companies allow a 600A commercial 4-gang/ meter service that has no main ocpd
    to have (4) 200A tenant OCPDs
    or,
    the total, sum all ocpds shall not exceed 600A...
  21. Replies
    10$$
    Views
    925

    About transformer

    Hi
    installed a 112.5 kva xfrmer to feed some loads (240v, 3w to 240V,4w conversion)
    I have the primary 100A-fused disconn. sw. adjacent to xfrmer, thru (3) #2 thhn,cu ;
    the xfrmer is 40 feet...
  22. Replies
    6$$
    Views
    689

    transformer location ??

    Hi ,
    i have to design a power distribution system to a new tenant moving , in an existing commercial space (a shell-designed space)
    all equipment in the new tenant space will be new.
    note that,...
  23. Replies
    5$$
    Views
    484

    Utility power disconnect

    Hi
    I am wondering that,
    Why utility the local company (LADWP) cut the power at their power pole on this tenant????

    (supplying an existing warehouse doing welding with an existing 3 phase 1200A...
  24. Thread: 380v Xfrmer

    by Toros
    Replies
    11$$
    Views
    681

    only 240v 3 phase is available (240v,60hz -...

    only 240v 3 phase is available
    (240v,60hz - to - 380v, 50hz all 3-phase)

    I do not think you need KVA rating now, this moment

    Thank you
  25. Thread: CO2 sensor

    by Toros
    Replies
    17$$
    Views
    976

    CO2 sensor

    Hi,
    I have oil extraction & processing room in los Angeles
    local Fire dept wants CO2 detection system in that room
    where can I get some more info about wiring diagram-sequence of...
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