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  1. Thread: MRI Room

    by mannyb
    Replies
    6$$
    Views
    158

    MRI Room

    We are building an MRI facility. They will test the MRI but will have an emergency run down button for emergency. Does anyone have any experience with this type of install. Is this basically a shunt...
  2. Thread: duct bank

    by mannyb
    Replies
    4$$
    Views
    250

    There is only a detail for load side of POCO xfmr...

    There is only a detail for load side of POCO xfmr to 3000a service. it doesnt showing any detail between service and feeders to MDP 1 or 2 would you say we can just install conduit as needed and...
  3. Thread: duct bank

    by mannyb
    Replies
    4$$
    Views
    250

    duct bank

    We have a set of drawings showing the load side of xfmr giving a detail for duct bank to service entrance gutter. 8-4'' conduits. There is no detail for anyother conduit run that laid underground. We...
  4. Thread: NEC 110.24

    by mannyb
    Replies
    1$$
    Views
    202

    NEC 110.24

    we are bidding 10k square building with 3000a service. The drawings provide no fault calculations for 110.24 or any calculations for 110.16 a or b. If the engineer hasnt provided neither and the EC...
  5. Replies
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    126

    Bussman fault calc

    I am trying to see how Bussman Fault Current app works by trying to get same number from app frim what's on the print. I have a multi tenant gutter with a 480v 3phase 4wire service and 2- 400a...
  6. Thread: Engineer vs EC

    by mannyb
    Replies
    10$$
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    759

    I do agree if the EC had designed the job then...

    I do agree if the EC had designed the job then they would be responsible if the engineer designed the work then he should provide all necessary data needed to complete work.
  7. Thread: Engineer vs EC

    by mannyb
    Replies
    10$$
    Views
    759

    That is great advise. Im not sure where you are...

    That is great advise. Im not sure where you are in the field of electrical owner, master of record or just plain JM. If you were master of record what duties or responsibilities would you require as...
  8. Thread: Engineer vs EC

    by mannyb
    Replies
    10$$
    Views
    759

    Engineer vs EC

    We have a project where none of the drawings have AFC calculation. The enginner didn't provide calculations to any drawings. Would the engineer or EC be responsible for supplying the calculation for...
  9. Thread: 110.16

    by mannyb
    Replies
    3$$
    Views
    273

    I only ask because the inspector turned down the...

    I only ask because the inspector turned down the final because it wasnt on our 400a service panel
  10. Thread: 110.16

    by mannyb
    Replies
    3$$
    Views
    273

    Does 110.16a just the warning label and 110.16b...

    Does 110.16a just the warning label and 110.16b is the one with AFC calculation?
  11. Thread: 110.16

    by mannyb
    Replies
    3$$
    Views
    273

    110.16

    The requirement for 110.16 is only for 1200a service and above?
  12. Replies
    7$$
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    452

    I agree with you. BTW is there a rule on how many...

    I agree with you. BTW is there a rule on how many xfmrs can be installed in ceiling? I was told that you cant install more than 3 xfmrs in ceiling tile. I asked them for code reference but they...
  13. Replies
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    452

    10 foot or 25 foot

    one of our jobs has 3 transfomers to be installed in ceiling under 50 kva. per drawing they are all required to be installed with 10' tap rule. The area is small and the xfmrs will need to be...
  14. Thread: Transformer

    by mannyb
    Replies
    5$$
    Views
    575

    I have couple 45kva transformers that need to be...

    I have couple 45kva transformers that need to be supported in ceiling. The restaurant has limited space and the xfmr will need to sit alot futher than 10' could I install a disconnect on xfmr then...
  15. Replies
    5$$
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    354

    I I agree but I also wanted to hear if anyone...

    I

    I agree but I also wanted to hear if anyone had any ideas for installation.
  16. Thread: Transformer

    by mannyb
    Replies
    5$$
    Views
    575

    Sorry for late response. The feeder disconnect...

    Sorry for late response. The feeder disconnect can be remote but the secondary needs to be within 10' and OCPD? correct? do you happend to know where in NEC where it addresses this application.
  17. Replies
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    354

    Roof top equipment

    one of our projects has the Electrical for AC units on roof. There is 400 HA panel XFMR and LV panel located on roof and near center of roodThere is no detail showing how the equipment on roof will...
  18. Thread: Transformer

    by mannyb
    Replies
    5$$
    Views
    575

    Transformer

    480v panel feeds Xfmr to 120240 panel. The xfmr will sit between the both. I was told i need to follow the 10' tap rule going from xfmr to LV panel. Could I put panel further than 10' ? The xfmr is...
  19. Replies
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    That's my question. If I stay at 9 ccc I'm only...

    That's my question. If I stay at 9 ccc I'm only using 70%. 30x.7= 21 amp for #12. Am I doing it wrong? My receptacle circuits the nuetral isn't ccc correct? So I can pUT more in conduit. I'm just...
  20. Replies
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    454

    lighting and receptacle ckts

    whats a good practice for installing lighitng and receptacle ckts. I looking at 8 ckts for lighting 4hot 4 neu 1grnd = 9 wire in 3/4''. and for receptacles 5 ckts 5 hots and 5 neutrals 1 ground = 11...
  21. Replies
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    503

    OK sounds good. thanks

    OK sounds good. thanks
  22. Replies
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    503

    load calculations and circuit

    If i have 150' of track light to put on load calculation do i just use the linear footage of track 150' x 150VA x 1.25 / 2 = 14063VA for calculation


    If I wanted to power the track lights and my ...
  23. Thread: disconnect

    by mannyb
    Replies
    7$$
    Views
    493

    The FCU s call for fused disconnects on drawings....

    The FCU s call for fused disconnects on drawings. I guess we a stuck running fused disconnects. Thanks for help.
  24. Thread: submittal

    by mannyb
    Replies
    2$$
    Views
    642

    submittal

    Our lighting supplier requested : "I need breakdowns on the runs for Type C and Type D so I can provide all the necessary hardware". D are track lights. 4-150' of track with led heads and There are...
  25. Thread: disconnect

    by mannyb
    Replies
    7$$
    Views
    493

    i dont see any specifications required other than...

    i dont see any specifications required other than the required disconnecting means usually required on this type application for servicing.
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