Motor Terminal Temperature Ratings Commented on: 11 weeks ago (June 10, 2014)


I assume your reference is from the 2014 NEC. In the 2011 NEC it is actually 110.14(C)(1)(a)(4). Would the ...(1)(a)... also be the case in the 2014 edition?

BTW: I reference...

HFT conduit design service life Commented on: 14 weeks ago (May 22, 2014)

I found the following information at a website called Clipsal by Schneider Electric:
"HFT stands for the three most important properties of this range of conduits H (halogen free), F (fire...

Arc-Flash Commented on: 15 weeks ago (May 15, 2014)

It's my understanding the manufacturers perform testing to determine the trip curves for their overcurrent protective devices. So I have no problem using those "numbers" to...

Worker Dies at Oil Sands Development After Earning Electrician License Commented on: 17 weeks ago (April 28, 2014)

In the case of Shane Daye it is too soon to be making judgements about what happened. An investigation with more information about what happened would be required before commenting.

But in...

RECEPTACLE FAILURE Commented on: 19 weeks ago (April 16, 2014)

Just my observations:

1. Based on the device being tamper resistant (TR on front) it is only a few years old. Therefore, I would not expect to see failure due to insertion/extraction of...

Motor feed wire heating Commented on: 19 weeks ago (April 16, 2014)


Based on the information, it is my opinion you are experiencing overheating of the motor feeder conductors because they are undersized.

According to Table 430.250, a 250 hp...

Hi-Hats Commented on: 19 weeks ago (April 16, 2014)

As MD has indicated, there are numerous things that need to be taken into consideration when performing lighting design.

But if you are looking for a down and dirty answer, I will give you...

Lighting Contactors Commented on: 22 weeks ago (March 28, 2014)

Without a complete description of the control and load circuits and how they are connected, a wiring schematic would be best, it is impossible to troubleshoot your problem. At a minimum, it sounds...

NEC Feeders Commented on: 22 weeks ago (March 28, 2014)

See Section 215.2(A)(1): requires an ampacity not less than 125% of the continuous plus the non-continuous load. In theory, you could have a 15A feeder, which would then be 14 AWG in accordance...

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