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  1. Replies
    6$$
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    143

    Because 240.21(C) says so :D sorry, devil made...

    Because 240.21(C) says so :D
    sorry, devil made me.... plus I can't say I am qualified to give you the answer. Paraphrasing what I have been told it has to do with a secondary load, other than...
  2. as long as the manufacturer lists the breaker...

    as long as the manufacturer lists the breaker lugs for two conductors you can connect directly to the breaker. If not, you could still pigtail off the breaker and splice into both circuits.
  3. Replies
    6$$
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    143

    same answers for a 125 amp breaker, That breaker...

    same answers for a 125 amp breaker, That breaker is still withing the allowable range to provide transformer protection without secondary protection as far as transformer protection is concerned....
  4. Replies
    6$$
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    143

    The 100 amp breaker is well within the 450.3...

    The 100 amp breaker is well within the 450.3 requirements for transformer protection. The 2011 Code does require a permanent means of locking it out if it is not in sight of the transformer.
    As far...
  5. Thread: overload relay

    by augie47
    Replies
    5$$
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    133

    Who is the manufacturer ?

    Who is the manufacturer ?
  6. I'm going to have to tighten up my inspections :D

    I'm going to have to tighten up my inspections :D
  7. Replies
    6$$
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    184

    :thumbsup:

    :thumbsup:
  8. Replies
    5$$
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    165

    Then all the corresponding rules of Art 230...

    Then all the corresponding rules of Art 230 apply. The restriction on the number of sets of service conductors in 230.71 with 230.2(C) and 230.40 taken into account.
    It is certainly possible, but a...
  9. Replies
    9$$
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    233

    A common example of this might be a UPS feeding...

    A common example of this might be a UPS feeding several computers.
    You often find a 100 amp panel with 20 or so 20 amp branch breakers simply to provide individual protection to several outlets even...
  10. Replies
    5$$
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    165

    If it's a customer transformer (as opposed to a...

    If it's a customer transformer (as opposed to a utility service transformer), 240.21(C)
    allows multiple secondary connections to a transformer provided the provisions of 240.21(C)(1) thru (6) are...
  11. Replies
    9$$
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    233

    In a standard panel, the 44 circuits would be...

    In a standard panel, the 44 circuits would be divided as evenly as possible between the 3 phases so each phase would have a potential load of 44/3 X 15 or 220 amps per phase.
    In addition the number...
  12. Thread: Why NRTL ?

    by augie47
    Replies
    11$$
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    340

    lets hope that's the case... I have not seen the...

    lets hope that's the case...
    I have not seen the UL report..there may well be some other limiting factor.
  13. Replies
    19$$
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    454

    I hate to fight that battle again. :D

    I hate to fight that battle again. :D
  14. Thread: Why NRTL ?

    by augie47
    Replies
    11$$
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    340

    I'll leave that up to the engineer's to decide,...

    I'll leave that up to the engineer's to decide, but I have not found a fuse that will
    reduce 43k to 5 k.
    The equipment has Class J fuses on each starter. Apparently those did not satisfy the...
  15. Replies
    19$$
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    454

    As Dennis can confirm, I had a terrible time...

    As Dennis can confirm, I had a terrible time with 310.15(B)(6) vs 338.10 in the '08 & '11.
    Now '14 has "straightened all that out"... except in my feeble mind...
    No doubt this is what you guys...
  16. Replies
    17$$
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    569

    I agree with that premises, but, according to Art...

    I agree with that premises, but, according to Art 430 Part IV, what would your GFSC rating for a fractional HP motor ?
  17. Thread: Why NRTL ?

    by augie47
    Replies
    11$$
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    340

    A couple of interesting inputs from the cabinet...

    A couple of interesting inputs from the cabinet manufacturer...
    (a) "we don't understand UL limiting the SCCR to 5k as the 800 amp main breaker is
    rated 65k"
    (b) "the way we see it, it's a...
  18. Replies
    17$$
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    569

    We have seen some units with OCP for the...

    We have seen some units with OCP for the evaporators built-in and some without.
    Whether internal or added we require proper OCP.

    (from wiring methods to OCP, mini-splits have been one of our...
  19. Thread: Transformers

    by augie47
    Replies
    7$$
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    239

    Nope. Take a look at 450.3 With proper primary...

    Nope. Take a look at 450.3
    With proper primary protection, there is no limit to the size of your secondary panel(s).
    125% of the transformer current is common.

    If you needed numerous circuits...
  20. Replies
    4$$
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    240

    As noted above, there are variables depending on...

    As noted above, there are variables depending on the type cord, termination temp. ratings, and number of current carrying conductors.. take a look at Table 400.5(B).
  21. Thread: Transformers

    by augie47
    Replies
    7$$
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    239

    If you wanted the max out of the transformer I...

    If you wanted the max out of the transformer I would suggest a 400 amp secondary panel.
    Regardless of the secondary panel size, I would be reluctant to go below your 150 amp primary breaker. There...
  22. Thread: Why NRTL ?

    by augie47
    Replies
    11$$
    Views
    340

    Why NRTL ?

    Had an interesting situation on an installation.
    The State of TN requires NRTL certification on equipment.
    On a recent install the facility has a SCA of 45k not counting motor contribution.
    A new...
  23. Thread: #6 NM-cable

    by augie47
    Replies
    14$$
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    369

    There is seldom a month that goes by that at...

    There is seldom a month that goes by that at least one HVAC contractor here does not have to change out his #6 NM to a #4. It seems a majority of the air handlers with 10kw heat now exceed 55 MCA.
  24. Thread: Gutter Tap's

    by augie47
    Replies
    8$$
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    347

    This is what I often see:...

    This is what I often see:
    http://www.ilsco.com/e2wShoppingCatalog.aspx?parentId=3100012729&parentLink=2100001183:3100012178:3100012237:3100012729
  25. Replies
    8$$
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    288

    Back to your original question. I have found the...

    Back to your original question. I have found the allowances for wiring additions to manufactured homes vary. In these area the majority are never inspected at the time of the installation. Most...
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