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  1. Replies
    3$$
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    714

    estimator and sales

    how are estimators and or sales guys usually paid. Do they get paid if they are awarded the job on time and in budget? are they usually electricians who become sales and estimators? if any help with...
  2. Thread: generator size

    by MBLES
    Replies
    10$$
    Views
    549

    [QUOTE=iceworm;1955354]Okay - try this snip...

    [QUOTE=iceworm;1955354]Okay - try this
    snip
    Following JF's post:

    The owners speced, .7pf - believe them until shown different.

    So, with what you have:
    (1179A /.7 pf ) x 480 x 3^.5 = 1400KVA...
  3. Thread: generator size

    by MBLES
    Replies
    10$$
    Views
    549

    I left out alot of information mainly because I...

    I left out alot of information mainly because I havent seen the equipment or know the processes. I also didnt know what to make of the information share to rental company. I will meet customer...
  4. Thread: generator size

    by MBLES
    Replies
    10$$
    Views
    549

    I understand. I am just curious why the customer...

    I understand. I am just curious why the customer provide the requirements in KWH vs the FLA on table 430.250 I did see where the customer did send the same info but in KWH to generator supplier and...
  5. Thread: generator size

    by MBLES
    Replies
    10$$
    Views
    549

    let me clarify a little. Customer wants a...

    let me clarify a little. Customer wants a temporary generator to operate some equipment with all these motors. The equipment is temporary for 3 or 4 months. The equipment is portable. There is no...
  6. Thread: generator size

    by MBLES
    Replies
    10$$
    Views
    549

    generator size

    i have a customer that wants to size a generator for this epuipment. They cant get [permanent power at this time so this is best option for them per them. I am trying to help them determine the size...
  7. Replies
    1$$
    Views
    305

    General lighting Demand load

    if I have a retail store 150x100 sqft and the store will have 300 luminaires 2 lamp 120v .75 amps and you had to determine demand load do you add both or larger of the two? IF ANY what is nec code if...
  8. Thread: monitor amperage

    by MBLES
    Replies
    14$$
    Views
    867

    monitor amperage

    I have a customer that has a tank filled with water/chemicals that has an auger that stays on all day. Sometimes the auger shaft breaks and motor keeps spinning that shaft is broken and there is no...
  9. Replies
    5$$
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    495

    you need not reply I read the thread you share...

    you need not reply I read the thread you share and that makes perfect sense. Thanks for help
  10. Thread: 20hz to 60hz

    by MBLES
    Replies
    27$$
    Views
    1,172

    Thanks for help. If we lower the Hz we also need...

    Thanks for help. If we lower the Hz we also need to adjust the voltage? The pump is a 480v 3phase small injector pump that feeds a clarifier for a water plant. The customer keeps the vfd to 20.9 hz I...
  11. Thread: 20hz to 60hz

    by MBLES
    Replies
    27$$
    Views
    1,172

    20hz to 60hz

    I dont have much experience with vfd speeds.The VFD controls the speed by controlling HZ correct? Is there a chart or calc that shows the speed? If I go from 60hz to 20.9hz and lets say its a 1200rpm...
  12. Thread: mobile home

    by MBLES
    Replies
    11$$
    Views
    774

    mobile home

    I have a customer who wants a new service for their mobile home. The service will be located closer to the road by POCO requirements so the feeder will be around 60' plus from service to mobile...
  13. Replies
    6$$
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    435

    I am reading 2017 code and 702.5 page 70-590 top...

    I am reading 2017 code and 702.5 page 70-590 top right page highlight where it says exterior of the equipment. I understand that we dont our own calc on the spot my question is do we posted the SCCR...
  14. Replies
    6$$
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    435

    I know the equipment has the SCCR labeled inside...

    I know the equipment has the SCCR labeled inside equipment or exterior But Im asking if it needs to be posted on exterior like it mentions in 702.5 that it needs to be exterior. I have seen transfer...
  15. Replies
    6$$
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    435

    SCCR documentation

    article 702.5 requires the SCCR on transfer switch? Would you just post the SCCR on equipment ? Like 65k for breaker feeding transfer siwth if listed and 65k for transfer switch if listed? Basically...
  16. Replies
    14$$
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    1,173

    Sorry I was thinking of another job with a...

    Sorry I was thinking of another job with a similar problem. I found answer upon reading other similar post.


    Yes Sir The Feeder Size is what I am looking for Its basically a chiller feeder that...
  17. Replies
    14$$
    Views
    1,173

    AC unit multi family

    I have 4 condenser 3 phase 208 40.8 RLA amps for compresser and 5.3 for fans. for multifamily. I am trying to determine the the branch circuit conductor. do i add up all the 184.4 x 125% =230A OR 4/0...
  18. Thread: A and E vs EC

    by MBLES
    Replies
    21$$
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    2,116

    i agree. I heard someone mention in my area that...

    i agree. I heard someone mention in my area that they can design up to 4k sqft. i was just curious why the NEC is big on calculations for mulit family and midsize buildings if most areas wont even...
  19. Thread: A and E vs EC

    by MBLES
    Replies
    21$$
    Views
    2,116

    A and E vs EC

    are there limits to the sqft or service a EC can design as an EC? or should the drawings be done by AandE?
  20. Thread: Transformer XO

    by MBLES
    Replies
    14$$
    Views
    1,414

    Yes Sir. Is there an address in NEC you can point...

    Yes Sir. Is there an address in NEC you can point me to?
  21. Thread: Transformer XO

    by MBLES
    Replies
    14$$
    Views
    1,414

    I have a similar but not so similar question so...

    I have a similar but not so similar question so Ill just piggy back off this post. Would the XFMR need a GEC to ground rod if installed on 10th floor? I have the transformer grounded to the raised...
  22. Thread: outside

    by MBLES
    Replies
    0$$
    Views
    246

    outside

    I have a transformer that will be feed from a breaker 200' away for primary. Does the secondary conductors OCP need to follow 10' tap rule on 240.21 C ? Or is that rule only if the transformer is...
  23. Thread: moved

    by MBLES
    Replies
    1$$
    Views
    314

    moved

    i moved to camp fire, thanks
  24. Replies
    3$$
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    500

    the question is a test question i got from a...

    the question is a test question i got from a masters exam test review page. Its basically asking how much load i can put on the feeder panel without going over 3% VD. Its not a real application only...
  25. Replies
    3$$
    Views
    500

    Test Question Volt Drop

    Test Q. A 240v single phase feeder with 2.0 alum thwn supplying an existing panel 260' from DP. whats max load that can be placed on the panel so that the VD is limited to 3%?

    I = 133100x...
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