Go Back   Mike Holt's Forum > Search Forums
Reload this Page Search Results
Forgot Login Information?
Register FAQ About Moderators Members List Calendar Search Today's Posts Mark Forums Read

Page 1 of 20 1 2311 > Last »
Showing results 1 to 25 of 500
Search took 0.09 seconds. Search: Posts Made By: dereckbc
Forum: Grounding versus Bonding Yesterday, 02:17 PM
Replies: 19
Views: 313
Posted By dereckbc
Well here is the POV of an engineer who is guilty...

Well here is the POV of an engineer who is guilty of this practice.

In the industry I work in we have engineering and installation practices to follow written by geeks like me. Makes life simple....
Forum: Electrical Calculations/Engineering 11-19-2009, 10:23 PM
Replies: 22
Views: 314
Posted By dereckbc
Gar beat me to the punch, use optical cable and...

Gar beat me to the punch, use optical cable and modems.
Forum: Grounding versus Bonding 11-19-2009, 10:20 PM
Replies: 5
Views: 86
Posted By dereckbc
It is happening because there is current flowing,...

It is happening because there is current flowing, and perfectly normal. It can also be from improper wiring which can be fixed.
Forum: NEC 11-19-2009, 05:25 PM
Replies: 13
Views: 420
Posted By dereckbc
Standard practice today in telephone offices.

Standard practice today in telephone offices.
Forum: Electrical Calculations/Engineering 11-18-2009, 01:47 PM
Replies: 13
Views: 239
Posted By dereckbc
Energy Miser. I suggest you go HERE...

Energy Miser. I suggest you go HERE (http://www.nmsu.edu/~tdi/Photovoltaics/Codes-Stds/PVnecSugPract.html) and download the document. It will answer most of your PV code questions and give you a lot...
Forum: Grounding versus Bonding 11-17-2009, 03:27 PM
Replies: 17
Views: 497
Posted By dereckbc
Sparks no offense, but the multi-grounded neutral...

Sparks no offense, but the multi-grounded neutral does not have anything to do with your dimmer problem. They are two separate issues.

Now my first guess is the rheostat has a bad spot in its...
Forum: Electrical Calculations/Engineering 11-17-2009, 02:47 PM
Replies: 13
Views: 239
Posted By dereckbc
Raider beat me to the punch. I am KO :grin:

Raider beat me to the punch. I am KO :grin:
Forum: Grounding versus Bonding 11-17-2009, 02:42 PM
Replies: 17
Views: 497
Posted By dereckbc
Seriously doubt it. Don't think you would notice...

Seriously doubt it. Don't think you would notice a thing with dimmers or anything else for that matter. Might have caused some radio interference problems though, but that is a big maybe.

All it...
Forum: Grounding versus Bonding 11-15-2009, 12:08 AM
Replies: 10
Views: 291
Posted By dereckbc
Concrete is such a good conductor, it is the only...

Concrete is such a good conductor, it is the only acceptable ground electrode method the military will allow in bomb storage vaults and aircraft hangers.

Herbert G. Ufer invented what is known as...
Forum: Electrical Contracting and Estimating/Management 11-13-2009, 10:20 AM
Replies: 20
Views: 622
Posted By dereckbc
Has a date, place, and time been set yet?

Has a date, place, and time been set yet?
Forum: Electrical Calculations/Engineering 11-13-2009, 10:19 AM
Replies: 19
Views: 377
Posted By dereckbc
Energymiser I though the whol epurpose of the...

Energymiser I though the whol epurpose of the Enphase micro inverters is to parallel them all up, and then run one set of conductors to a single or two 240 volt breakers.
Forum: Hazardous (Classified) Locations 11-07-2009, 04:35 PM
Replies: 6
Views: 194
Posted By dereckbc
Um you cannot use compressed hydrogen as a fuel,...

Um you cannot use compressed hydrogen as a fuel, not enough energy density. It has to be liquefied which requires cryogenic refrigeration. By the time you account for all the energy input and thermal...
Forum: Electrical Calculations/Engineering 11-07-2009, 12:57 PM
Replies: 58
Views: 1,503
Posted By dereckbc
Battery back up grid tied system? That is a huge...

Battery back up grid tied system? That is a huge waste of money and certainly not green friendly. They do realize batteries have to be replaced about every 5 years don't they? That means the will...
Forum: NEC 10-13-2009, 05:16 PM
Replies: 6
Views: 220
Posted By dereckbc
48 up to 400 volts, solar PV stuff. Currents up...

48 up to 400 volts, solar PV stuff. Currents up to 100 amps
Forum: NEC 10-10-2009, 12:14 PM
Replies: 6
Views: 220
Posted By dereckbc
AC-DC Rated Breakers

Which manufacture and model makes dual rated breakers? Is it the Square D QUO series? Any others worth mentioning?
Forum: Grounding versus Bonding 09-24-2009, 11:02 PM
Replies: 5
Views: 194
Posted By dereckbc
You are between a rock and hard place. I work for...

You are between a rock and hard place. I work for Verizon Wireless and design protective ground systems at cell sites. Sprint is in clear violation of NEC and even their own engineering/installation...
Forum: Electrical Calculations/Engineering 09-24-2009, 10:54 PM
Replies: 13
Views: 349
Posted By dereckbc
That is not going to happen period. As Bob...

That is not going to happen period.

As Bob mentioned you can use what is called a Hybrid inverter with battery back up, and use the genset to keep the batteries charged while utility power is out,...
Forum: Low Voltage and Limited Energy 09-20-2009, 12:16 AM
Replies: 24
Views: 754
Posted By dereckbc
Well I will put my 2-cents in. Most of this has...

Well I will put my 2-cents in. Most of this has been said except for one thing.

An amplifier will be rated at a specified power into a specified impedance. For example let's say 100 watts into 2...
Forum: NEC 09-03-2009, 10:02 PM
Replies: 101
Views: 4,343
Posted By dereckbc
Dennis never underestimate the power of prayer,...

Dennis never underestimate the power of prayer, you will be in mine, and I will have the congregation at my church pray this Sunday.
Forum: Low Voltage and Limited Energy 08-22-2009, 08:18 PM
Replies: 28
Views: 1,297
Posted By dereckbc
Start at the demarcation point, disconnect it and...

Start at the demarcation point, disconnect it and look back at the CATV line. If it is clear, the problem is from the residence. If so then divide and concur by disconnecting all terminations and...
Forum: Electrical Contracting and Estimating/Management 08-19-2009, 03:33 PM
Replies: 12
Views: 391
Posted By dereckbc
Ok so will it down to your kids, it will still...

Ok so will it down to your kids, it will still work with fresh batteries. 8-) however from the NRC in your link quotes;
The Nuclear Regulatory Commission, which regulates the radioactive material in...
Forum: Electrical Contracting and Estimating/Management 08-19-2009, 01:32 PM
Replies: 12
Views: 391
Posted By dereckbc
This is funny. First Lithium would be the battery...

This is funny. First Lithium would be the battery of choice for smoke detectors.

The exposure you receive from a smoke detector is considerably less than the dirt in your front yard. Most smoke...
Forum: Electrical Calculations/Engineering 08-15-2009, 11:45 PM
Replies: 8
Views: 341
Posted By dereckbc
Gar thanks I understand that part perhaps I did...

Gar thanks I understand that part perhaps I did not make myself clear.

My real interest is in a 400 Hz synchronous vs say a induction asynchronous. As a hobby I modify golf carts, which are...
Forum: Electrical Calculations/Engineering 08-14-2009, 01:34 PM
Replies: 8
Views: 341
Posted By dereckbc
Synchronous Motor Question

Ok another dumb question from a mod I know, just that motors are not my field of expertise.

I was under the impression for variable speed control of AC motors an asynchronous should be used as...
Forum: Safety 07-31-2009, 01:00 PM
Replies: 4
Views: 205
Posted By dereckbc
In addition to the measure you have listed add...

In addition to the measure you have listed add eye wash to it.
Showing results 1 to 25 of 500
Page 1 of 20 1 2311 > Last »

 
Forum Jump

All times are GMT -4. The time now is 09:12 AM.

- Archive - Top

Powered by vBulletin® Version 3.7.3
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.