Search:

Type: Posts; User: augie47

Page 1 of 8 1 2 3 4

Search: Search took 1.17 seconds.

  1. Replies
    14$$
    Views
    497

    Although confirming the system with POCO would be...

    Although confirming the system with POCO would be productive, from the OP's posts it sounds like this is a subpanel (downstream from his service disconnects at the pole). If that is the case, even if...
  2. Replies
    12$$
    Views
    168

    Likewise, I'm not a "transformer" man so take...

    Likewise, I'm not a "transformer" man so take that into account, however, here is a diagram (obviously ignore the voltage) of (2) single phase transformers used on 3 phase systems/
    May help.
    ...
  3. Replies
    6$$
    Views
    348

    (bump) I brought this back with hope for...

    (bump)
    I brought this back with hope for additional input...
    We have a situation with two schools of thought and engineers with conflicting opinions.
    Again, this is governed by the '08 Code which...
  4. Replies
    11$$
    Views
    141

    It being a 3 phase 4 wire secondary, the...

    It being a 3 phase 4 wire secondary, the secondary conductors can not be considered protected by the primary OCP device so they would have to be sized to your secondary protection, in this case your...
  5. Replies
    10$$
    Views
    182

    are the 241, 244, 243 readings the ampere...

    are the 241, 244, 243 readings the ampere readings on each phase ?
  6. Replies
    14$$
    Views
    497

    I think you would be "grasping at straws" but...

    I think you would be "grasping at straws" but considering your predicament it might be worth talking to your AHJ IF the initial install was completed before 2008 and conditions are such that the...
  7. Replies
    14$$
    Views
    497

    Sight unseen, I tend to agree that you have a...

    Sight unseen, I tend to agree that you have a 480Y/277 system (your voltage readings seem to confirm that) and the neutral stops at the service disconnects.
    What type of conduit system connects your...
  8. Thread: gfi in kitchen

    by augie47
    Replies
    16$$
    Views
    564

    With the unquenchable quest for knowledge I find...

    With the unquenchable quest for knowledge I find in my inspection area (at least 5 electricians have a current NEC), I still encounter folks who comply with the "6' ft of the sink" rule :D
  9. I bet ! :thumbsup:

    I bet ! :thumbsup:
  10. I don't doubt your numbers but am curious as to...

    I don't doubt your numbers but am curious as to what data you used to determine the ambient adjustment.
    55° seems low for 18-24" but that may be correct for MA.
  11. It appears to me the biggest change in '14 is...

    It appears to me the biggest change in '14 is that it made it clearer that the derating factors apply. NOW instead of using any 2/0 Cu for the applicable 200 amp service, you need a conductor rated...
  12. Get back to you on that. I had concetrated on the...

    Get back to you on that. I had concetrated on the termination... didn't approach any other issues.
  13. I have to join Smart$ in the brain resting :)...

    I have to join Smart$ in the brain resting :) but, on second and third look, since 110.14 addresses 310.15(B)(7), I tend to agree but as kwired points out, be prepare for a lengthy discussion with...
  14. Replies
    3$$
    Views
    161

    There are some low voltage LED retrofit kits on...

    There are some low voltage LED retrofit kits on the market that would be worth investigating, IMO
  15. OK.. little slow tonight so bear with me. 400...

    OK.. little slow tonight so bear with me. 400 amp service 2014 Code 83%
    332 amp required. (for the moment let's ignore the adjustments.)
    Parallel conductors 332/2 = 166 amp conductor
    Do we not...
  16. Since we are not using '14 yet I certainly can't...

    Since we are not using '14 yet I certainly can't say I have a grasp on it.
    I guess I'm trying to compare it to the old 310.15(B)(6) when we had a 200 amp service we could use a 2/0 Cu, 150 amp...
  17. Replies
    6$$
    Views
    154

    You do NOT want to connect the neutral of the 108...

    You do NOT want to connect the neutral of the 108 system to the transformer in any manner.
    (That has noting to do with the grounding)

    If you elect to connect one leg of the 480 system to ground...
  18. IMO, 110.14 would prevent you from terminating...

    IMO, 110.14 would prevent you from terminating the 1/0 at greater than it's 75° ampacity of 150 amps, or 300 amps for the parallel system.
    As a side note, locally we would not allow 10 ft to the...
  19. Replies
    6$$
    Views
    154

    You need to decide if you want to use your 480v...

    You need to decide if you want to use your 480v secondary as an ungrounded system or a corner grounded system.
    If you operate as "ungrounded" then you GEC is simply connected to the transformer...
  20. Replies
    18$$
    Views
    352

    Correct me if I'm wrong, but I think there is an...

    Correct me if I'm wrong, but I think there is an often overlooked "catch" here.
    430.102(B) (2) states the cotroller disconnect required in 430.102(A) shall be permitted to serve as disconnecting...
  21. Thread: guestion

    by augie47
    Replies
    3$$
    Views
    204

    It is also important to note restrictions on...

    It is also important to note restrictions on cable types in regard to location. Plenum and riser cables have specific regulations,
    Likewise communication cables have specific requirements as...
  22. If your 220v side does not have a center tap, you...

    If your 220v side does not have a center tap, you have no reference point to
    obtain 120v on that side,
  23. Replies
    3$$
    Views
    115

    This link is interesting where the mfg. shows...

    This link is interesting where the mfg. shows cables less than 1" OD with a different classification.

    http://www.amercable.com/doc/catalogs/mining/cirmiu.pdf
  24. Replies
    3$$
    Views
    115

    Doubt you will find much variance. What AWG ?

    Doubt you will find much variance. What AWG ?
  25. Replies
    15$$
    Views
    428

    :thumbsup:

    :thumbsup:
Results 1 to 25 of 200
Page 1 of 8 1 2 3 4