Please note that this video is inaccurate for American NEC code. Especially when discussing the OCPD sizing which is calculated off rhe load, never exceeding 80% of the OCPD even when non continuous loads are used.
At 1:26, you mention how we need a red black blue in each of those conduits to cancel out the magnetic fields, then we wouldnt get any overheating in those conduits. I struggle to understand magnetism. Why is it that the magnetic fields cancel each other out? Thank you.
As this is a three phase load, it is required to have a three pole breaker, but as the drawings of the breakers look like they are lined up with the conduits I see the confusion. To be clear the symbol drawn is not for three individual breakers, but one three pole breaker.
@@schulerruler make sense. Quipment grounding conductor in ea raceway need to be based on the ocpd and big enough to clear the fault need not Devine by 3.
@@rob1111 often times on larger breakers there are multiple termination points, or the terminal is rated for multiple conductors under the same termination.
@@dovisaacman178 No, as it is not considered a current carrying conductor based on 4-004 3), and 4). I look at it as the four wire circuit will never have more than 3 equivalent conductors of current.
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Please note that this video is inaccurate for American NEC code. Especially when discussing the OCPD sizing which is calculated off rhe load, never exceeding 80% of the OCPD even when non continuous loads are used.
Thank you
Your Information helps to me
If you paralleling the feeder wires that are in multiple set how about the equipment grounding conductor?
At 1:26, you mention how we need a red black blue in each of those conduits to cancel out the magnetic fields, then we wouldnt get any overheating in those conduits. I struggle to understand magnetism. Why is it that the magnetic fields cancel each other out?
Thank you.
ruclips.net/video/IAAZCMns8YM/видео.html
That guy is an expert in the field pretty interesting.
number 0 awg is correct, not 1 awg. is it right?
in theory could you do as many parallel as you want? to use small wires? or is there a code againts that?
The smallest size permitted is a 1/0 conductor so there are limitations on it.
Great info thx. Not sure but you should draw only 1 instead of 3 OCPD on your video presentation.
As this is a three phase load, it is required to have a three pole breaker, but as the drawings of the breakers look like they are lined up with the conduits I see the confusion. To be clear the symbol drawn is not for three individual breakers, but one three pole breaker.
@@schulerruler make sense. Quipment grounding conductor in ea raceway need to be based on the ocpd and big enough to clear the fault need not Devine by 3.
@@schulerruler thanks for this clarification
Can you recomend any books
Is there 9 conductors in total then? 3 per conduit?
That is correct.
@@schulerruler Where would the nine wires connect to at the 3 pole breaker and on the load? Sorry, I'm just starting out.
@@rob1111 often times on larger breakers there are multiple termination points, or the terminal is rated for multiple conductors under the same termination.
@@schulerruler I see. The same would be at the load side too I guess. ( multiple terminations)
Thanks 👍
does it change if you have a neutral?
The neutral can be sized the same as your ungrounded conductors. You are permitted to apply 4-018 to reduce the neutral size of needed though.
@@schulerruler do you need to de-rate the conductors if there are four because of the neutral?
@@dovisaacman178 No, as it is not considered a current carrying conductor based on 4-004 3), and 4).
I look at it as the four wire circuit will never have more than 3 equivalent conductors of current.
@@schulerruler Hi, I can understand everything just what is this 4-018 and 4-0043? I will appreciate your response
These are references to the rule numbers and subrules in the Canadian electrical code book published by the Canadian standards association (CSA)