EC&M - Latest Comments

Re: The Basics of Isolated Grounding Receptacles

Ndamacio — Wed, 23 May 2012 03:38:01 -0000

Can I use metal box as a pull box grounding system?

Re: Whats Wrong Here?

Jenne Vinodrao — Mon, 21 May 2012 02:45:06 -0000

cable gland and enclosure is missing

Re: Whats Wrong Here?

Willis — Fri, 18 May 2012 13:30:02 -0000

It looks like a three phase disconnect that has had a fuse holder to go bad and they eliminated the fuse holder and tied the wiring together. An accident waiting to happen

Re: Stumped by the Code? April 2012

Usnretmike — Thu, 17 May 2012 13:29:58 -0000

I am looking for help on a question. " A self contained space heater may be plugged into a standard receptacle. True or False?" Give the NEC article that supports your answer. I have looked at Articles 422.33, 424.3 (A) and 427.55 (3) Assistance Please

Re: The Shocking Truth About Grounding Electrode Conductors

Carl — Thu, 17 May 2012 09:38:45 -0000

Ed and Paul, thank you!! you have no idea how hard it is to find factual information regarding the nature of electricity. this article is extremely helpful and informative. thanks again, and please keep up the writing.
sincerely,
carl borders

Re: Code Q&A

Bradbosshart — Wed, 16 May 2012 18:40:14 -0000

What about spacing of electrical outlets in bathrooms in commercial buildings. Does the 3' from the basin apply?

Re: What Lamps Will Be Phased Out?

Anon — Wed, 16 May 2012 16:11:25 -0000

I understand that many lamp manufacturers are no longer producing 6-foot T8 lamps as well. Can anyone explain why that is?

Re: Achieving Discrimination of Circuit Breakers in Computer Rooms

Phathilizwe Ndamase — Sun, 13 May 2012 11:27:00 -0000

Thank you for this article , it has solved my confusion on the cause of a tripping upstream MCB.Fabulous!

Re: Commercial Loads — Part 2

Muawiy — Thu, 10 May 2012 08:58:59 -0000

I have 3 floor each floor 1400 Sqm I am looking the calculation method for that

Re: Ground Testing Techniques

Anil k kar — Wed, 09 May 2012 19:12:44 -0000

Some old industrial plants have Ufer grounding and there is no pig tail to test the ground resistance. I would like to know your ideas for testing the ground resistance.

Re: Palatine Parking Garage LED Retrofit Is a Drive-Away Success

Stu Russell — Wed, 09 May 2012 19:07:18 -0000

This sounds like a great project.. But, why did it take federal stimulus money to do it? If the payback is 1..22 years, why didn't the city pay for it without the grant?

Re: Understanding NEC Circuit Classifications

DC — Wed, 09 May 2012 17:17:42 -0000

What is a Class 2 Circuit?

Re: Specifying the Right Fuse for Circuit Protection

David — Tue, 08 May 2012 19:38:06 -0000

Excelent article. I've saved this information for teaching purposes only.
I'm a teacher for electricity signatures at college.Thanks for sharing.

Re: Line Reactors and VFDs

Mcsc — Mon, 07 May 2012 22:51:15 -0000

what kind of line reactor should i use on a 400 hp electric motor 5%,3% or 1.5% Impedance

Re: Troubleshooting Residential Submersible Pump Systems

Ski_daddy02 — Mon, 07 May 2012 19:35:39 -0000

tried to start well hasnt run in 6 years no water pulled submersable pump 3 hundred feet cleaned every thing and pipe dry run few secound put back in try again no water and can see by meter running for a few min. and trips internal overload ? thank you

Re: Troubleshooting Residential Submersible Pump Systems

Alvagp — Fri, 04 May 2012 19:16:26 -0000

If there are three wires going down to the submerged pump black, red, white or yellow is it likely that the one (red) wire is start and one (black) wire is run and the last is common? I am pretty sure the capacitor is in the pump.

Re: Whats Wrong Here?

Reichmand — Fri, 04 May 2012 12:38:43 -0000

Hey, that's not plumbing pipe-it's rigid conduit. Only problem is the elbows are not listed for this use and the AHD would need to grant a special dispensation-may not be too likely but then again!!

Re: Commercial Electrical Load Calculations

Electrical Contractor — Tue, 01 May 2012 19:57:09 -0000

Information is a little dated but the calculations are still valid to a point, its surprising how many elecricians cant make these calculations, most likely because they have been in domestic work for a while and forgetten some of the skills required when entering into commercial and industrial electrical services.

Re: Remodeling Recovery Expected to Strengthen by Year’s End

Son Lakhani — Mon, 30 Apr 2012 14:47:41 -0000

In addition: besides summer being the preferred season for house remodeling, there's also the wave of rehabilitating damaged houses after the cold and wet season (in some areas, at least) that also accounts for these figures.

Re: Troubleshooting Residential Submersible Pump Systems

tom — Fri, 27 Apr 2012 12:30:46 -0000

it sounds like the relay is not switching from start to run. its best to replace the control box which gives you new capacitors and relay

Re: Code rules for low-voltage lighting.

Jwbmii — Wed, 25 Apr 2012 19:45:06 -0000

Can you hang RG59 18-2 plenum rated cable from trusses using zip ties?

Re: Arc Fault Detection: Your Questions Answered

Thermioincz — Tue, 24 Apr 2012 12:47:39 -0000

In regards to your last well stated paragraph:
I would like to see the NFPA 70E become more stringent when it comes to "Qualified" persons performing electrical work. I work for a municipality that has contracted out most of it's major construction projects and sadly I am always called in to "fix" the multitude of sins that for one reason or another the "inspector" did not catch. I could go on forever but the point being is that in a worst case scenario, arc fault is a band aid to fix a problem we are seeing more and more in the trade and use of underqualified persons perfoming electrical work. Thanks for your comment Sparky!

Re: Understanding Basic Fire Alarm Systems

Nn — Tue, 24 Apr 2012 06:57:04 -0000

check the bell circuit end of line resistance

Re: Arc Mitigation – A Three-Step Approach

Ryan — Sun, 22 Apr 2012 11:39:21 -0000

The resistance ground system does not significantly reduce the energy released. It reduces the *chance* of an arcing fault. See the IEEE 1584 tests, or talk to the IEEE 1584 working group. I believe it's a misconception that resistance grounded systems actually reduce the hazard because empirical tests have measured the same energies. That's why the formula for incident energy is the same for a resistance grounded system.

Re: Insulation Resistance Testing: How and Why?

Montybhai90 — Sun, 22 Apr 2012 10:14:58 -0000

ir measurement is in dc since the value of current and resistance is not time variant