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NEC: Branch Circuit Conductors, Minimum AWG, Part 2 Commented on: 5 days ago (May 20, 2015)

Third paragraph, third sentence: the OCPD is to be 40A MINIMUM, not maximum [see Sec. 210.19(A)(3)].

NEC: Branch Circuit Conductors, Minimum AWG, Part 1 Commented on: 2 weeks ago (May 8, 2015)

In the last paragraph, did you mean to say, "...plus 125% of the continuous load"?

Tip of the Week: Practicality Forms the Basis of NFPA 70E Commented on: 3 weeks ago (April 30, 2015)

PLC Training - Good Point: 70E is the minimum starting point for "...practical safe working area..." regarding electrical work. One can and should improve upon the requirements in 70E however and...

Secrets of the Code-Making Process Commented on: 14 weeks ago (February 16, 2015)

Thank you Krista for another brief, but excellent explanation about a source of many misconceptions in our industry. Something I have been told and did not notice was that the proportion of any...

Equipment Grounding Conductors and Voltage Drop Commented on: 14 weeks ago (February 16, 2015)

Did a fast check and could not find an alternative for an inadequately sized EGC in Type MC cable other than using cable tray as the EGC as allowed by Sections 250.118(11) and 392.60.

Then...

NEC: Grounded Conductors, Part 1 Commented on: 20 weeks ago (December 31, 2014)

A correction needs to be made to the last paragraph.

IEEE 142-2007, "IEEE Recommended Practice for Grounding of Industrial and Commercial Power Systems," is The Green Book.

The...

Code Quiz: Motor and Controller Disconnecting Means Commented on: 22 weeks ago (December 21, 2014)

I agree with Alan. From the information presented in the question both disconnects comply with Section 430.102. At the same time, no information was given to indicate the disconnects were or were...

What’s Wrong Here? Hint: A Service That Needs to be Serviced Commented on: 26 weeks ago (November 20, 2014)

Concerning the point of attachment:

From what I can discern from the photo I do not believe this building was resided since the service was installed. The siding shows signs of dirt and...

The Latest Generator Design Trends Commented on: 26 weeks ago (November 20, 2014)

Thank you Krista, a nice brief argument for paralleling gen-sets. I agree that many engineers of late design one unit, say 2 MW in size, to serve an entire hospital instead of multiple units, say...

What’s Wrong Here? Hint: Wide Open Spaces Commented on: 34 weeks ago (September 29, 2014)

From what I can see in the photo, the violation to cite when red-tagging this installation would be Section 314.21, which should be sufficient.

From this photo I cannot discern where the...

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