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     1  +6 2014 mar 06light fixtures that whislesHigh-Pitched Sound When Lights Turned On - Mike Holt EnterprisesMike, I had a call from my son today regarding his experience in installing a new light fixture and dimmer switch. The fixture has five, 60-watt  ...
     1  +1 2014 mar 03arc flash analysisWhat is Arc Flash ? - Mike Holt EnterprisesArc Flash is the result of a rapid release of energy due to an arcing fault between a ... To perform an arc flash hazard analysis , data is collected about the facility's  ...
     1  +2 2014 mar 01arc flash study
     1  ~ 2014 feb 19mike holt electricalMike Holt Enterprises HomeNational Electrical Code explanations, training and tips. Includes downloadable resources and a forum. Mike Holt's ForumFirst - FAQ - Register -
     1  ~ 2014 jan 15gfci for machinesGFCI Receptacle Behind Vending Machine - Mike Holt's Forum - Mike Reference NEC 2011 Article 210.8. Is a GFCI receptacle located behind a vending machine considered "readily accessible"?
     1  ~ 2014 jan 12dedicated electrical equipment110.26 Spaces About Electrical Equipment - Mike Holt(F) Dedicated Equipment Space. All switchboards, panelboards, distribution boards, and motor control centers must be located in dedicated spaces and  ...
     1  ~ 2014 jan 11php estimating softwareMike Holt Estimating SoftwareBefore purchasing estimating software , you should familiarize yourself with Mike Holt's Illustrated Guide to Electrical Estimating. Electrical contractors must know  ...
     1  ~ 2014 jan 11amprobe vs idealIdeal or Amprobe - Mike Holt's Forum - Mike Holt EnterprisesDoes anyone here have experience with or own either of the two following circuit tracers? Do you have any opinions on which would be the  ...
     1  ~ 2014 jan 06electrical exam prepMike Holt Exam Preparation - Mike Holt EnterprisesInformation on our comprehensive Electrical exam preparation course, questions and answers on passing your exam, exam preparation tips, a link to our online  ...
     1  ~ 2013 dec 23motor control circuit1 Basic Principles of Motor Controls - Mike Holt EnterprisesThis unit discusses the basic concepts of motor control, including “motor control language” and the types of wiring diagrams used. Motor Control Circuits .
     1  ~ 2013 dec 17mike holt booksMike Holt NEC BooksFind out why these books have become the standard for NEC training.
     1  +3 2013 dec 17residential load calculatorResidential Load Calculations - Mike Holt Enterprises
     1  ~ 2013 dec 17electrical motor control circuitsMotor Control Circuits . Motor control circuits are an effective way to reduce ... ment, NEMA and IEC. NEMA (National Electrical Manufacturers Association).
     1  +4 2013 dec 09residential load calculation
     2  +99 2014 feb 28led rope lights leakinggreen jelly in rope lights - Mike Holt's Forum - Mike Holt EnterprisesWell the other nite I was over having a drink and looked at the rope lighting , ther was some kind of green jelly build up dripping from the  ...
     2  +1 2014 feb 25national electrical code tabs2011 National Electrical Code Tabs - Mike Holt Enterprises2011 National Electrical Code Tabs - 11TB. These peel and stick tabs are a great way to customize your Code book. Included within the tab package are 84 tabs  ...
     2  +4 2014 feb 19home depot superbuildHome Depot Estimating Software - Mike Holt's Forum - Mike Holt So as a "thank you" for my business, Home Depot sent me an email yesterday ... Go to;
     2  -1 2014 feb 06pvc clamp unistrutUnistrut Clamps - Mike Holt's Forum - Mike Holt EnterprisesAre the metal unistrut clamps acceptable for PVC ? If not, is there a clamp made for PVC ? Frank.
     2  ~ 2014 jan 15multiwire branch circuitUnderstanding the Dangers of Multiwire Branch CircuitsYes, multiwire circuits offer fewer conductors, reduced raceway size and ... According to NEC Article 100, a multiwire branch circuit consists of two or more  ...
     2  ~ 2014 jan 08ups service bulletinUPS Battery Resources (Battery Recalls/Technical Service Bulletins Good Day - I am a program manager supporting a team of CET's maintaining a number of small, but high density data centers for a large client.
     2  ~ 2014 jan 05the best conductorWhat's the best conductor ? - Mike Holt's Forum - Mike Holt EnterprisesA colleague and I were discussing the other day about what metal is the best conductor . I've always thought silver was the best, and have even  ...
     2  ~ 2014 jan 05what is arc flashArc Flash is the result of a rapid release of energy due to an arcing fault between a phase bus bar and another phase bus bar, neutral or a ground. During an arc  ...
     2  -1 2013 dec 23ground satalite dishesGrounding Satellite Dish and Lead-In Cables - Mike Holt EnterprisesBy Mike Holt, for EC&M Magazine. Q1. I need to know the current NEC rules regarding the use of RG-6 W/messenger ground wire for an 18 in. satellite dish .
     2  -1 2013 dec 21gfi breakers for poolSwimming Pool Pump GFCI Breaker - Mike Holt's Forum - Mike Holt So, figuring pool pump is 2 hp 230 VAC 1PH with integral thermal protection. From table 430.238. FLC is 12 amps. Historically, we sized the  ...
     2  ~ 2013 dec 11stedi volt tvssTvss Claims Energy Savings - Update - Mike Holt EnterprisesHow do I verify and compare this to other TVSS products? www. redivoltmfg .com ..... These claims appear from Redi- Volt & Stedi - Volt on a regular basis.
     2  -1 2013 dec 04wire pulling rope rentalRequest advice on long wire pull (please) - Mike Holt's Forum I can't see how using the #4 as a pull wire would work with the tugger. Any advice or
     3  ~ 2014 mar 02wire bending radiusMinimum wire bending radius - Mike Holt's Forum - Mike Holt I've got a situation where a contractor put in some 500 MCM wire and butchered it pretty badly. Here are the problems, all in about a 12" area: 1  ...
     3  +15 2014 feb 27electrical calculation excelMike Holt Electrical Formulas - Mike Holt EnterprisesDescription, Word™, Excel ™, PDF. Arc Blast Calculator .
     3  -1 2014 feb 15operating currentHOW DO I CALCULATE AC OPERATING CURRENT /VOLTAGE FOR PV? - Mike TRYING TO FILL OUT LABEL REQUIREMENTS, NOT SURE OF FORMULA FOR FIGURING AC OPERATING CURRENT AND OPERATING  ...
     3  +1 2014 feb 05double meter boxDouble -tap meter base or feed-through panel? - Mike Holt's Forum Can the meter -base load-side lugs be tapped again, eg. with those ... the house? Or some additional dedicated tap enclosure for both (ugly) ?
     3  ~ 2014 feb 03fire rated conduitFire Rating Conductors / Conduit - Mike Holt's Forum - Mike Holt When installed in conduit (standard building wire thhn thwn in EMT RGS) does the conduit help to provide a " fire rating " for the cables. for  ...
     3  +7 2014 feb 03drip pans for pipingSheet metal drip pans over electric panels? For Sprinkler I have seen situations where "wet" sprinkler piping will "sweat" in high humidity locations and sprinkler couplings can leak. A small drip pan   ...
     3  ~ 2014 jan 21coax to ground rodSatellite Coax and grounding - Mike Holt's Forum - Mike Holt Would I be able to run a 10 AWG insulated wire from the COAX grounding block 50 feet around the house to the ground rod or is this too far?
     3  -1 2014 jan 10male male power cordMale to male power cord - Mike Holt's Forum - Mike Holt EnterprisesIs there a code section than prohibits a power cord with a male plug on both ends ? I have made the statement that I will be fired before I let this  ...
     3  +3 2013 dec 31stand alone generator njAdding a Transfer Sw and Stand alone Generator to an existing Is there any way legally to add a transfer switch and generator to an already ... Join Date: Feb 2003; Location: New Jersey ; Posts: 2,296 ... more complicated, optional standby is optional standby no matter where it is installed.
     3  -1 2013 dec 29electrical riser diagramsElectrical Riser Diagram - Mike Holt's Forum - Mike Holt EnterprisesI am an electrical design engineer for residential and commercial buildings. I started this job a week ago. Can some one help me understand  ...
     3  +4 2013 dec 25electrical panel clearanceRequirements for Electrical Installations - Mike Holt Enterprisesauthority having jurisdiction must approve all electrical conductors and equipment. Figure 110– ... What's the right working clearance for a given installation? • What do the .... such as switchboards, panelboards, industrial control panels , meter.
     3  +2 2013 dec 20x ray floor slabXRAY Concrete slabs - Mike Holt's Forum - Mike Holt EnterprisesI haven't actually Xrayed any,,,but I have a subfloor scanner that will locate steel or plastic pipe in 6" of conrete. I've used it several times to find  ...
     3  +1 2013 dec 09sylvania circuit breakersAre obsolete Sylvania Panels listed for use with GE circuit I have seen some Sylvania panels with all GE breakers and am ... Any ideas on the best route to verify what breakers are listed for use in these  ...
     3  +8 2013 dec 05doble test videoDoble Testing? - Mike Holt's Forum - Mike Holt EnterprisesThere is not really such thing, just slang. It refers to a Power Factor /Dissapation Factor test done on mostly transformers but also motors and MV  ...
     4  ~ 2014 mar 08national electric codeNational Electrical Code explanations, training and tips. Includes downloadable resources and a forum.
     4  ~ 2014 mar 07national electrical code
     4  +2 2014 feb 28photocell control diagramLighting control wiring diagram / detail ? - Mike Holt's Forum Anyone has a combination photocell / time clock detail or installation wiring diagram to control exterior lighting?
     4  ~ 2014 feb 19home depot estimating softwareSo as a "thank you" for my business, Home Depot sent me an email yesterday with a link for their estimating software . Did you know that you  ...
     4  +14 2014 feb 16pulsed dc input to transformerDC through a step up transformer - Mike Holt's Forum - Mike Holt Can DC c be converted to AC current through a step up transformer ?
     4  ~ 2014 feb 14home depot estimatingSo as a "thank you" for my business, Home Depot sent me an email yesterday with a link for their estimating software. Did you know that you  ...
     4  -2 2014 feb 13différence entre 51n et 51g50/ 51G and 50/ 51N - Mike Holt's Forum - Mike Holt Enterpriseshi, What is the difference between 50/ 51G and 50/ 51N to protect the solid ground transformer? I have unbalance load so which one should I  ...
     4  +1 2014 feb 07grounded transformeGrounding Electrode Conductor at Transformer (12-7-2K) - Mike Holt Mike, I have a transformer installed on a fishing pier (depth of water is 20-30 feet deep). The feeder to the transformer is supplied from service equipment located  ...
     4  ~ 2014 jan 30finding an open circuitFinding an open in a circuit - Mike Holt's Forum - Mike Holt What are some of the proven ways to find an open in an electrical circuit without tearing the house down.
     4  +3 2014 jan 25portable generator groundingGrounding /Bonding a Portable Generator - Mike Holt's Forum - Mike I am using a portable generator that I will only be using with cord and plug connected equipment. I have checked with the meter and the neutral  ...
     4  -1 2014 jan 15underground electrical conduit replacementremove and replace wire in underground conduit ... - Mike Holt's in a tenant space, the existing underground conduit is 2" ridged under a ... Electrical Calculations / Engineering; remove and replace wire in  ...
     4  +12 2014 jan 14lightining protection softwareSoftware for Lightning Protection - Mike Holt's Forum - Mike Holt Hello all! I've got a question to engineers design of Lightning Protection Systems. What software do you use into your work, especially to  ...
     4  +1 2014 jan 13doble test equipmentDoble makes the most commonly used test equipment for these tests. Hence the name Doble test. Just like a Megger test, which is really an  ...
     4  -2 2014 jan 09anchor meter socketAnchor Meter Sockets - Mike Holt's Forum - Mike Holt EnterprisesI have run across these meter sockets in mobile home parks in several places in central Florida. Typically they are 4 gang, with 150 amp  ...
     4  +5 2014 jan 06electrical code book
     4  +1 2014 jan 06dewalt aftermarket batteryAftermarket replacement batteries for DeWalt ????? - Mike Holt's I have seen plenty of company websites for aftermarket batteries. ... the Nano battery /drill combo) Are there any legitimate aftermarket providers  ...
     4  ~ 2013 dec 26tom henrys electrical booksHas Tom Henry's Book Company Changed Hands? - Mike Holt's Forum Code Electrical Classes Inc. 7449 Citrus ... Has Tom Henry's book company been sold or otherwise taken over by someone else. Just not the  ...
     4  -1 2013 dec 18led drivers wikiLED Driver VS. power Supply - Mike Holt's Forum - Mike Holt OK, what is the difference between an LED Driver and a power supply? ... See also
     4  +7 2013 dec 17lawyer opportunity zone signElectrical Warning Signs - Mike Holt's Forum - Mike Holt EnterprisesThe wording on the sign reads: DANGER! LAWYER OPPORTUNITY ZONE Failure to have perfectly adequate warnings that anticipate every  ...
     4  +12 2013 dec 07silicon controlled rectifierSCRs: What are They and How Do They Work? - Mike Holt EnterprisesAn SCR , or Silicon Controlled Rectifier , is a semiconductor, or integrated circuit ( IC), that allows the control of current using a small current.
     5  -3 2014 feb 12wire bending radius'
     5  ~ 2014 feb 04height receptacle garageElectrical Outlet Height / Garage - Mike Holt's Forum - Mike Holt I have search the forum for the correct answer but no one is sure. What is the height requirement for an electrical outlet in the garage ?
     5  ~ 2014 feb 04garage receptacle height
     5  -1 2014 jan 28wire temporary lightingArticle 527 - Temporary Installations - Mike Holt EnterprisesAt one time, electricians would install temporary power or lighting under those ... Exception: You can use open wiring for branch circuits in holiday decorative  ...
     5  +31 2014 jan 15fire rated downlightFire - rated downlight - Mike Holt's Forum - Mike Holt EnterprisesGot a slight issue on my hands. I've got plenty of 8" downlights being recessed into a fire rated ceiling. Typically we would box around the  ...
     5  +2 2014 jan 15amprobe or ideal
     5  +2 2014 jan 14indiana electrician licenseMike Holt Electrical Contractor Licensing Boards — Listing by StateLicensing Requirements for Master Electrical licenses , Journeyman Electrical Licenses , Electrical Contractor licenses , and other electrical license types. Click on  ...
     5  -1 2014 jan 13voltage drop calculationVoltage Drop Calculation - Mike Holt EnterprisesWire calculator based on voltage drop according to National Electrical Code.
     5  +5 2014 jan 12free php examMike Holt Free Quizzes and ExamsFree Exams Theory. Theory Quiz . Exam Prep. Journeyman Simulated Exams ( Available for all current code years) ... Free 2011 Solar Photovoltaic Systems Quiz .
     5  +3 2014 jan 06how harmonics are causedMike Holt Harmonics - What You Should KnowStrangely, electronic equipment requires clean power, but its power supplies generate the reflective harmonic currents that cause the voltage distortions!
     5  -1 2013 dec 30transformer insulation classTransformer insulation class - Mike Holt's Forum - Mike Holt Hi We require two 3000 kva,12kv/415v dry type transformers for parellel connection.Our specification needs a temperature rise of 65 degrees  ...
     5  -3 2013 dec 27around corner drill bitsDrilling around corners - Mike Holt's Forum - Mike Holt EnterprisesI don't bother trying to go around a corner if it's solid wood. I go up a stud, ... Have used angle drill bits with good results. Rather than two  ...
     5  +2 2013 dec 26califorina journmans electric cardLicensing Requirements for Master Electrical licenses, Journeyman Electrical Licenses, Electrical Contractor licenses, and other electrical license types. Click on  ...
     5  ~ 2013 dec 17double tap neutralsDouble tapping neutral bars - Mike Holt's Forum - Mike Holt This probably has been answered in the past but I could not find a "thread." I am a new home inspector and when looking at the Square D  ...
     5  -2 2013 dec 14turbocad vs autocadDoes TurboCad equals AutoCad ? - Page 2 - Mike Holt's Forum - Mike Turbocad vs Autocad . I will take a look at Bricscad, Autocad Lite, and Revit. Thanks for saving me alot of time. Ravenvalor Electrical Contractor
     5  +3 2013 dec 14drop voltage calculation
     5  -1 2013 dec 08electrical license illinoisIllinois Electrician cert/ license - Mike Holt's Forum - Mike Holt Hello, I'm interested in obtaining a license to practice in Illinois . Anyone have any info that may help me, where to take exam , costs? Training  ...
     6  +8 2014 jan 24bonding metal drain pipeBonding short sections of copper water pipe - Mike Holt's Forum IMO no do not bond , the bit of copper in the bathroom is not a metal water .... metal drain pipes to be metal water pipes which require bonding ?
     6  -3 2014 jan 23right angle ground plugReceptacles - Ground Up or Ground Down? (9-23-99) - Mike Holt I was told that it is better to put the ground at the top because it holds the plug in ..... If you mount the ground pin up and you plug in a right angle plug such as you   ...
     6  -4 2014 jan 23barter for electriciaBarter for Electrical Work ? - Page 3 - Mike Holt's ForumI had an interesting situation today. A local dentist contacted me by way of a referral, and was interested with me bidding the electrical work for  ...
     6  +2 2014 jan 15apprentice electrician interviewApprentice Interview - Mike Holt's Forum - Mike Holt EnterprisesAre they standard interview questions such as Why do you want to be an electrician , what makes you a good electrician , etc? I did a little  ...
     6  -2 2014 jan 01ul directory editionUL White Book - Electronic Version Available - Mike Holt EnterprisesThis Directory contains the General Guide Information for product categories in UL's Electrical Construction Equipment and Hazardous Locations Equipment  ...
     6  -1 2013 dec 23voltage drop calculations
     6  +4 2013 dec 16recessed lighting templateHole Sizes for Recessed Lighting - Mike Holt's Forum - Mike Holt I've only used the templates that come with the lights and have not measured them. I have a new "Hole Pro" hole saw and would like to know if I  ...
     6  +3 2013 dec 14ground telephone systemWhy bond telephone ground rod to electrical ground rod? - Mike Just for my own information, and so I can explain when clients ask -- what is the danger (if any) if 2 separate grounding systems are not bonded  ...
     6  ~ 2013 dec 08powered by vbulletin chillerChiller plant - Mike Holt's Forum - Mike Holt EnterprisesI have a chiller plant for a school my question is do I have to bond the chilled water pipes? I'm being told ... Powered by vBulletin ® Version 4.2.1
     6  +4 2013 dec 06licensed electrical contractorsLicensing Requirements for Master Electrical licenses, Journeyman Electrical Licenses , Electrical Contractor licenses, and other electrical license types. Click on  ...
     6  -3 2013 dec 04plenum rated power cordsPlenum - rated Power Cord - Mike Holt's Forum - Mike Holt EnterprisesWe mfg electronic power distribution equipment for computer racks/servers. Generally we use SO, SOW, or SJT power cable for our equipment.
     7  +8 2014 mar 07shunt trip breakersshunt - Mike Holt's Forum - Mike Holt EnterprisesCould someone help me make since of this word. I've heard the term shunt trip breaker . I've heard people say that devise has been shunted.
     7  +2 2014 mar 06nec electrical codeNEC . CODE (632.2633) 3604 Parkway Blvd, Ste 3, Leesburg FL 34748. "
     7  -1 2014 mar 02liebert ups forumLiebert UPS , over voltage. - Page 4 - Mike Holt's Forum - Mike They have a Liebert UPS feeding their data center. It registered an over voltage and went on bypass (utility feeding the data center). They argue  ...
     7  ~ 2014 feb 25megger testingmegger testing - Mike Holt's Forum - Mike Holt EnterprisesThen i open the wire or the circuit to be tested .then i crank up the megger .it is my understanding that this test measures the quality of the  ...
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