Residential Recessed Panel Commented on: 27 weeks ago (November 20, 2014)

Not sure what you are asking. The requirements for securing cables can be found in Section xxx.30 of each of the cable Articles (for example, 330.30 for Type MC cable). As far as I know, the...

Looking for Help on Webinar Talking Points Commented on: 37 weeks ago (September 7, 2014)

I spent a few years working for audiovisual contractors / system integrators and attended engineerbill's grounding seminar at InfoComm in 2007. Bill knows grounding, especially regarding...

Motor Terminal Temperature Ratings Commented on: 50 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: 1 year 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: 1 year 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: 1 year 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: 1 year 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: 1 year 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: 1 year 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: 1 year 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...

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