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  1. Replies
    7$$
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    578

    Not sure if they took the diversity factor for...

    Not sure if they took the diversity factor for receptacles in RP panel. How would a 250A work? Are you thinking about some diversity that all of the RTU's may not work at the same time?
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    22$$
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    927

    It is a multifamily dwelling. If I understand...

    It is a multifamily dwelling. If I understand correctly the only way you can use optional method with gas ranges is to include 8kW in load calculations. If not use the standard calculation method...
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    22$$
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    927

    Thats exactly what i have but just want to see if...

    Thats exactly what i have but just want to see if anyone has other code references in NEC.
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    22$$
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    927

    The exception says you take the lowest between...

    The exception says you take the lowest between electric cooking and without electric cooking. I am clear on service size. Is there anywhere in NEC where it specifically says you need to add a certain...
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    7$$
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    578

    Based on the riser they already provided a 600A...

    Based on the riser they already provided a 600A disconnect with 2 sets of 500kcmil. Your service size is 600A. Unless and until there is a need for some future loads your service size will be...
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    22$$
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    There's nothing in 220.84 for gas ranges.

    There's nothing in 220.84 for gas ranges.
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    7$$
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    There are a lot of spares in there. My guess is...

    There are a lot of spares in there. My guess is they accounted for future load growth.
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    22$$
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    927

    Gas range load calculation

    Hello,

    Is there anywhere in NEC where you are require to put a certain load(kW) in load calculations for a range even though its gas?
  9. Thanks!Appreciate it.

    Thanks!Appreciate it.
  10. Keep in mind all fire pump controllers come with...

    Keep in mind all fire pump controllers come with an emergency run handle or lever that operates to mechanically close the motor-circuit switching mechanism which means that if you have a soft start...
  11. Anyone selling power PE reference materials?

    Hello,

    I am planning to take my PE exam in Oct this year. Is anyone selling their old PE books or reference materials?
  12. Replies
    0$$
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    359

    Fire pump on generator

    Happy Friday all,

    If you have to put a fire pump on generator then do you size the generator based on direct on line start for fire pump or use the starting method provided in controller? Remember...
  13. Yes i am aware of that. Thanks!

    Yes i am aware of that. Thanks!
  14. No my lights will be backed up by generator. ...

    No my lights will be backed up by generator.

    An elevator being an optional standby load needs to be on generator for fire fighter operations.
  15. But now a days ATS manufacturers can supply load...

    But now a days ATS manufacturers can supply load shedding modules that can kick in loads based on owners priority like below:

    http://www.generac.com/all-products/transfer-switches/home-backup
    ...
  16. Its a apartment building. I saw article 700 and...

    Its a apartment building. I saw article 700 and it says clearly under transfer switches that emergency transfer switch must supply only emergency loads. I guess that would answer my question.
    I am...
  17. Sorry i am used to using that quite a bit. Yes...

    Sorry i am used to using that quite a bit. Yes both of them are same.
  18. One ATS for both life safety and emergency loads

    Hello,

    Can i use just one ATS to supply life safety loads(Exit signs,Lighting) and emergency loads(Elevator and receptacle load) from one single ATS? My distribution is i have a breaker in...
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    33$$
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    1,570

    Fingers crossed :D

    Fingers crossed :D
  20. Replies
    33$$
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    1,570

    True i have three disconnects which are rated at...

    True i have three disconnects which are rated at 800a,600a and 200a. I think that should be safe enough with out getting into trouble :thumbsup:
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    33$$
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    1,570

    They all are going to come from same transformer...

    They all are going to come from same transformer vault somewhere on the street.

    Before we even go to 230.2(c) to talk about multiple services, my scenario counts as one service since they all...
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    33$$
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    1,570

    Yes all the laterals terminate in the same...

    Yes all the laterals terminate in the same trough. I am sure POCO is gonna bring in different size laterals to feed different loads..In that case yes POCO will dictate what lateral supplies which...
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    12$$
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    894

    Thanks boy it took me little time to figure that...

    Thanks boy it took me little time to figure that image out.
  24. Replies
    33$$
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    1,570

    Thanks everyone for the answers. I read 230.40...

    Thanks everyone for the answers. I read 230.40 Exp.2 and according to that as long as your underground service entrance conductors are larger than 1/0 and the disconnects grouped at one location...
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    4$$
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    404

    Well instead of running 4 different feeders to 4...

    Well instead of running 4 different feeders to 4 floors which first of all adds up cost to your feeder length,extra breakers in switchboard.In feed through scenario you are just running one feed fro...
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