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  1. Thread: breaker size

    by Smart $
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    8$$
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    Profile also indicates NJ as location. NJ is on...

    Profile also indicates NJ as location. NJ is on 2011 edition (SE only 60°C where installed inside through thermal insulation). However, the Code in effect at the time of installation may have some...
  2. Thread: voltage drop

    by Smart $
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    2$$
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    Where a circuit has more than one size conductor,...

    Where a circuit has more than one size conductor, the total voltage drop is determined by the sum of segment voltage drops.

    The hard part about calculating yours is the receptacle. A...
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    6$$
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    The minimum OCPD rating is the noncontinuous...

    The minimum OCPD rating is the noncontinuous calculated load plus 125 percent of the continuous calculated load.

    The above statement is based on 230.41(A)(1), but 230.42(A)(3) is an option seldom...
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    YES. For starters, 210.20(A) and 215.3 both...

    YES.

    For starters, 210.20(A) and 215.3 both state in part, "the rating of the overcurrent device shall not be less than the noncontinuous load plus 125 percent of the continuous load." That...
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    Here's a write up of my second concert... ...

    Here's a write up of my second concert...

    http://www.post-gazette.com/ae/music/2009/06/21/ZZ-Top-Aerosmith-concert-at-Three-Rivers-Stadium-was-one-crazy-day/stories/200906210207

    Has some...
  6. Replies
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    And there you have an example of why the neutral...

    And there you have an example of why the neutral is often required... to maintain line-to-neutral voltage in case of part failure or fault.
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    That is correct... :D

    That is correct... :D
  8. Replies
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    That's not exactly right... as we're talking...

    That's not exactly right... as we're talking about upsized ungrounded conductors, which has the consequence of upsizing the EGC, and cascades to the grounded conductor.

    In the scenario jagged'...
  9. I understand the concern, but see it as a...

    I understand the concern, but see it as a consequential issue to the OP... meaning MC and rigid to the same box is not prohibited, but bonding the rigid and MC armor must be ensured as required by...
  10. Hmmm... my 501.30 is on grounding and bonding. ...

    Hmmm... my 501.30 is on grounding and bonding.

    And there is no mention of sheet metal in 501... :?
  11. Hmmm... that only covers requirement for box or...

    Hmmm... that only covers requirement for box or fitting to be explosionproof.

    I'd say the relevant Code reference is simply 501.10(B)(1) and/or (2) covering the permitted wiring methods.
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    The rationale underlying increased EGC size...

    The rationale underlying increased EGC size (though validity can be debated) is to provide an effective fault current path. As all conductors may be a fault current path, it stands to logic the...
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    The point wasn't about protecting the conductors....

    The point wasn't about protecting the conductors. It was simply an exercise for which you concluded correctly.

    But just to add a bit of innuendo, if all electrical equipment worked perfectly,...
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    2014 705.12(D)(2)(3)...

    2014

    705.12(D)(2)(3)...
  15. Sure can... :happyyes: Welcome to the forum....

    Sure can... :happyyes:

    Welcome to the forum. :thumbsup:
  16. Replies
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    Okay, let's say you have a 240V 1Ø heater load. ...

    Okay, let's say you have a 240V 1Ø heater load. There no neutral, current travels back and forth on the two conductors.

    Now let's say we have three of them on a 240/120V 3Ø 4W system and we...
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    You have to know how to apply Kirchoff's Current...

    You have to know how to apply Kirchoff's Current Law (Google it) with respect to 3Ø, essentially for each point in time. It essentially states the sum of currents entering a junctioin (node) is...
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    Understand... Check back in if he gives you a...

    Understand...

    Check back in if he gives you a hard time. We'll try to give you some ammunition for a rebuttal.
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    I say you can use 220.84. The problem is, some...

    I say you can use 220.84.

    The problem is, some air-brained inspectors believe because there is a section that is titled "Determining Existing Loads" in Article 220 Part IV, that is the only...
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    Welcome :thumbsup: Have to assume we are...

    Welcome :thumbsup:

    Have to assume we are talking dwelling unit(s) service, right?

    If so, no problem at all. Ohio adopted the 2014 NEC as of 1/1/15, and the requirements of 310.25(B)(7) have...
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    That's all fine, but let's not forget, confuse,...

    That's all fine, but let's not forget, confuse, or obscure that details determine what is required...

    If there is no EGC in the cables, aluminum cable tray can be used as the EGC. 390.60 covers...
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    You didn't state the number of floors, but since...

    You didn't state the number of floors, but since you said 11 units per floor, you're looking at at least 22 units. With that size of service, there's a fair chance POCO has demand data. However,...
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    Replace fused disconnects with non-fused??? ...

    Replace fused disconnects with non-fused??? Perhaps common trip breaker, but not non-fused. Or perhaps I'm misunderstanding what you are saying. Is there downstream motor SC/GFP?

    Do these not...
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    Generally speaking, not if the transformer is...

    Generally speaking, not if the transformer is inside. That would only be true if transformer is outside. 240.21(C)

    If this is a supervised industrial facility, you may be able to. 240.92(C)
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    Yes, if listed for grounding. Not all metal...

    Yes, if listed for grounding. Not all metal connectors are listed as such.

    But if they are not, I don't see how adding a bonding bushing would increase the connectors bonding effectiveness to the...
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