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  1. You can distribute your 120v load between all the...

    You can distribute your 120v load between all the phases. Without knowing the exact load the NEC would consider it at 180va per outlet adding 45kw to your 100 kw 3 phase load. The closest size would...
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    Over they years I have found the situation to be...

    Over they years I have found the situation to be clear as mud also.
    Looks like if that 3/4 copper domestic water line is a good grounding electrode, that 8" iron pipe might be also :)
    At one time I...
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    At first glance it sounds as if the install would...

    At first glance it sounds as if the install would be a violation of 400.8
  4. You might want to check... some of the condenser...

    You might want to check... some of the condenser to interior units are "line voltage"
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    From a NEC stand-point, because 250.23(A)(5)...

    From a NEC stand-point, because 250.23(A)(5) prohibits any connection between the grounded
    conductor and grounding conductor other than in the 1st (service) disconnecting means
  6. I see nothing wrong so far. Have you given...

    I see nothing wrong so far. Have you given thought to the interconnecting wiring between the condenser and interior units ?
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    If it's a non-conductive coating, here's a simple...

    If it's a non-conductive coating, here's a simple fix
    https://erico.com/part.asp?part=POOLMESH250&applications=utility
    IF your wallet is thick enough.
  8. Thread: RFS/MOCP

    by augie47
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    I would agree. If the nameplate only mentions...

    I would agree. If the nameplate only mentions "fuse" and fails to mention "breaker" or "over current protection (non-specific)" then to meet mfg. specs you would need to protect the equipment by a...
  9. Thread: RFS/MOCP

    by augie47
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    Thanks. IMO, we would need to know the MCA to...

    Thanks.
    IMO, we would need to know the MCA to apply 440.12.
    Odd nameplate to have MOCP ratings of 42/38. European possibly ?
  10. Thread: RFS/MOCP

    by augie47
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    Based on 440.12 my guess would be "no" but I am...

    Based on 440.12 my guess would be "no" but I am not familiar with an electrical acronym "RFS".
    Does the nameplate have "MCA" noted.
  11. It is not unusual for a thunderstorm to cause a...

    It is not unusual for a thunderstorm to cause a "break" in a circuit.
    With that said, in line with your profile and Forum Rules:

    I am closing this thread, in accordance with the Forum rules. This...
  12. Take a look at 250.136(A)

    Take a look at 250.136(A)
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    lot better

    lot better
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    (1) set of 500s per phase rated 380 amps on a 600...

    (1) set of 500s per phase rated 380 amps on a 600 amp overcurrent device ? What Code section are your relying on ?
  15. see it done all the time. as long as the smallest...

    see it done all the time. as long as the smallest conductor is protected by the overcurrent device, no problem. That short a piece of wire...as noted anywhere in the system, will make negligible...
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    600 amp disconnect with 600 amp fuses ?

    600 amp disconnect with 600 amp fuses ?
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    I must be missing something !! (1)500 per phase...

    I must be missing something !! (1)500 per phase ? What size overcurrent protection ?
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    Good point !:D 220.82(B)(3)(d) for "optional"...

    Good point !:D
    220.82(B)(3)(d) for "optional" and 220.53 for "standard" will help on your calculations.
    Looks like one of those areas where the "optional method" might be beneficial.
  19. Thread: 320A Service

    by augie47
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    I agree with the others but if your install is in...

    I agree with the others but if your install is in Washington (based on your profile) you might wait for one of the guys familiar with WA Code. Sometimes it's a bit "different".
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    The details will make some difference. Some RVs...

    The details will make some difference. Some RVs are designed for 30 amp 125v or 50 amp 240v supplies neither of which are required to be GFCI.
    A 15 or 20 amp 125v receptacle installed outdoors will...
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    I would agree with lucky. 410.117 addresses "...

    I would agree with lucky. 410.117 addresses " whips" for fixtures.
    The install you describe would require full size branch circuit conductors in an applicable Chapt 3 wiring method. Length and...
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    220.60 gives you a bit of wiggle room but since...

    220.60 gives you a bit of wiggle room but since they are not electrically interlocked it would be a local AHJ question, IMO.
    Considering most inspectors don't take into account the customers...
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    690.64 actually refers you to 705.12 and all of...

    690.64 actually refers you to 705.12 and all of that section would apply.
    Is there no Main in or ahead of the service panel either one ?
  24. Thread: 220.55

    by augie47
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    That is one tough Table to teach :)

    That is one tough Table to teach :)
  25. Thread: 220.55

    by augie47
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    220.55

    To make sure I don't look more foolish in my class would someone else confirm the 220.55 calculated load for 14 cooking units, 6 @ 9-1/2 and 8 @ 18
    (I came up with 33kw)
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