Become a Licensed Master Electrician

Becoming an Electrician takes years of study.  I like to think of it as time well passed.  An Electrical Apprenticeship is the best way inorder to learn the Electrical Business.  However you decide to study, either through working for an Electrical Contractor, a License Master Electrician, an Electrical Course or Trade School the Electrician should always remember that learning doesn't end when you achieved your goal.  Goals should be constantly planed to reach new goals.  After you pass your Journeyman Electrician License Exam study to pass your Electrical Contractors License Examination to obtain your Electrician License or Fire Alarm Exam.  Studying the NEC code book takes a life time to master.  The Electrical and Fire Alarm Exam Questions test book helps the individual prepare for their Electrican Test while trying to understand their National Electrical Code.

Only one Licensed Master Electrician in the Company?

A Master Electrician License or Master Electrician Certification will be obtained by studying the right NEC code questions. Using this online Electrical Testing Prep Course the student can become a Licensed Master Electrician, or obtaining a Licensed Journeyman Electrician Certification. The Electrical Apprentice can also learn Electrical Formulas and Electrical Diagrams leading towards their goal of a Master Electrician or obtaining their State Electrical Contractors license. Electrical Code Questions and Nec Questions can be accessed through The NEC or National Electrical Code book as well as using the Fire Alarm code book (NFPA 70 & NFPA 72) are reference books that electricians use and study from to maintain safe electrical installations while working for an electrical contractor. It is common for only one Master Electrical license to be in the electrical contracting company. The Master Licensed Electrician will have Journeyman Electricians who have their Journeyman License also working for the same company but work under the direct supervision of that Master Electrician license holder. An Electrical apprentice will then work under the Journeyman.

Our online Electrical Test Prep Course at for the Licensed Master Electrician Exam or Journeyman Electrician Exam has Free Electrical Practice Exam Questions showing you common Tests containing Electrical Exam Questions and Fire Alarm Exam Questions. has an excellent book that gives you Electrical and Fire Alarm Exam Questions by Nec questions. Electrical and Fire Alarm Exam Questions Book is a great resource in learning how to use the National Electric Code Book (NFPA 70) and Fire Alarm Code Book (NFPA 72) in conjunction with Don’t just study the answers, learn the code, be a true Electrician.

Taking Electrical Exams?

Many Electrical Students ask for more help or a tutor prior to taking their test.  They seem to get nervous.  Then when I ask them How many hours a week do you study or open their NEC Code book they begin to tell me many excuses.  First find that quiet place to read or begin your studies.  For me I rather liked to study in book stores or the Library because of the many Electrical books I could reference and possible buy.  Coffee helped me fuel my need to read more Electrical Books to help me pass my Master Electrician and Fire Alarm Exam, maybe it will help you.

How is the voltage drop calculated?

Branch circuits are the conductors located between the last over current device and the utilization equipment.  Branch circuits may be located in the service equipment or in a panel supplied by a feeder.  When we look at voltage drop, remember the total of 5% allowed is between the Feeder and branch circuit.  If we compensate or size the wire for 3% volt drop on the feeder, then we must compensate for only 2% on the branch circuit, the total being 5%.  If we compensate or size the wire for 2% volt drop on the feeder, then we must compensate for only 3% on the branch circuit, the total Vd being 5%. Vd = I x Rw or voltage drop = Load x the Resistance of the wires. Rw can be determined by Chapter 9 Table 8 conductor properties using the column marked DC resistance for uncoated wires where the resistance values for the size wire being used in the ohms for every kilofeet or 1000 feet. Therefore for single phase Vd = I x 2 wires x Rw of 1 wire. For 3 phase Vd = 1.73 x I x Rw X 1 wire. Rw of one wire = circuit length/1000feet x resistance value given in chapter 9 table 8.

After installing AC or BX Is a Bonding Jumper Required when joining a Receptacle to a metal box?

BX is Trade slang for AC or Armored Cable.  The Internal Bonding strip made of cu (copper) or al (aluminum) should remain in contact with its flexible metal armor along its entire length.  This Bonding strip is used to hold the anti-short bushing or redhead (trade slang) from falling off and is used to protect any size wires from abrasion and Not just #4 awg and larger.  The armor of AC itself is suitable as an equipment grounding conductor as per 250.118 or 320.108.  However when entering boxes where a change is made in order to supply a receptacle, the receptacle must have a bonding jumper in case of short circuit.  The Bonding jumper would be installed from the green screw of the recepacle to the grounded box through the connection of the AC cable to the Box. 

You can find grounding receptacle requirements in article 406 or 250.146.  Basically if the receptacle is attached to a removable cover-mounted receptacle cover , a bonding jumper from the receptacle to the metal box is mandatory.  If a receptacle is attached directly to the box with at least one washer removed and direct metal to metal contact is established, then NO bonding jumper is required.  However certain electrical inspectors still require it.  This is a very debatable topic.  I suggest enrolling in a code change classes and becoming a member of in the IAEI organizations to discuss further.

A very important article is 250.148 which discusses continuity and attachment of equipment grounding conductors to boxes.  Remember the Armor of AC is OK to be used as an equipment grounidng conductor (see 250.148(c) in the NEC or National Electrical Code Book).  Note if a non-wire type equipment grounding conductor is used, grounding the metal box is not required provided the raceway or armor is suitable except when a bonding jumper or grounding continuity is required.

How are MC, AC (BX) and NM (Romex) cables required to be secured?

     MC (Metal Clad Cables) contains equipment grounding conductors.  The smallest size available according to the NEC that shall be used is # 18 awg copper.  Note that some fire rated conductor material is of nickel or nickel-coated copper.  There is also cable used for Optical Fiber called MC-OF.  The size of the equipment grounding conductor is sized based on Table 250.122 of the National Electrical Code however when part of a cable assembly such as MC, AC, BX, or Romex, NM cable the size required is already determined for you.  The allowable ampacity of the conductors in MC or Metal Clad Cable shall be determined by the appropriate allowable ampacity table.  When securing, MC cable must be supported in new construction within 12 inches of the box and not exceeding 6 feet intervals.  AC or BX on the other hand shall be supported also within 12 inches of the box but not exceeding 4 1/2 ft intervals.  For finished spaces not more than 6 Ft or where its impractical such as in a concealed wall then no supports down or in that wall are required.

     A common mistake is to believe that NMC means nonmetallic conduit which is not true.  NMC is a type of nonmetallic-sheathed cable.  There are three types of nonmetallic sheathed cables.  NM which contains a nonmetallic jacket, NMC a nonmetallic jacket with Corrosion resistance, and NMS which is used for signaling purposes with a nionmetallic jacket.  Romex or NM cable can be used for One and two family dwellings as well as multifamily dwellings.  In NYC Romex can be used when not exceeding three floors above grade.  Romex doesn't have fire protection and is also not allowed in nonresidential buildings in NYC. 

     When passing through a floor NM cables NMC or NMS shall be protected using Rigid, IMC, EMT or Schedule 80 PVC at least 6 inches above the floor.  In unfinished basements and crawl spaces cables containing at least 2 #6 awg or 3 #8 awg or larger shall be secured to the lower edges or the joist.  All other cables shall pass through bored holes.  When securing horizontal or vertical runs securing is the same as AC cable, 12 inches from the box and 4 1/2 feet there after.  But what of underground installations?  Underground wiring or UF cable falls under article 340 Underground Feeder and Brach Circuit Cables which cannot be used in NYC for Direct Burial.

Examples 1-3 and Explanations for Electricians Work duties on your License Application

Example 1

     While working with _____________, I have been on practically a new job everyday.  I have relocated telephone lines and installed 110 blocks and 66 Blocks.  Customers moving required existing lines from one floor to another.  Electrical duties consisted of installing 2 x 2 lights as well as running 3/4" EMT to 4 11/16" boxes used for 3 way switching.  Power was also installed in Basements which tied into Low Voltage panels 120/240 volts.

Example 2

     The majority of work with ____________ has been the Electrical renovation of floors in ________.  First the jobs have consisting of shutting down power to the floor, installing temporary light and then the demolition.  While carpenters were framing I was reviewing Electrical prints, writing out a material list and calculating the required number of men or women to start the job.  BX or Armored Cable was mostlty used for lighting and Power as well as 3/4" Stub ups for telephone.  Service work in the closet required disconnects, panels and troughs in order to coordinate with lighting and power out on the floor.  Fire Alarm Systems consisted of working with galvanized pipe for Fire Alarm Panels and coordinating with HVAC system shutdown in case of fire through the use of relays.

Example 3    

     So and So Electric had a major contract with _________ for the Electrical rewiring and addition of cicuits in ___________.  Work consisted of using existing pipe in  the apartment to pull new wire and separating circuits according to the code.  Every bedroom would require a new Air Conditioning Line which required wiremold from existing outlet locations.  Bathrooms now required switches and a GFI outlet.  Had to chop out single gang cover to a double gange cover.  New Panels had to be installed in apartments through the kitchen with the use of greenfield.  If pipes were clogged I had to clear them using some trade tricks such as the use of vinegar.


Examples 4-6 and Explanations for Electricians Work duties on your License Application

     Example 4

     I have worked with____________ Electric pulling Data communication lines through underfloor raceways from Demark telephone closets to new partion office locations.  I have punched down 66 and 110 blocks as well as telephone jacks using appropriate color code and punch down tools.

     Example 5

     Have worked in renovating building and floors in ________ and many other buildings.  Installed 4 inch pipe for communications and power.  Built racks made of kindorff suspended from the ceiling to support 4 inch pipe using K-straps.  Installed risers to pull boxes through 22 floors.  Worked in pump room in _____ using galvanized pipe and fittings .  Jobbing in a van everyday to install separted lines in a number of buildings to meet code and customer needs.  Installed 1 inch pipe under raised floors on kindorff to pullboxes that led to new panels throughout the floor, pulled wires and terminated.  Spliced in pull boxes, grounded panels to existing street side of water mains and supplemental grounds to rods using ground clamps.

     Example 6

     ________ had a contract with _________ wihich needed alot of work.  Had to ground panels, install lighting over assebly line locations through the use of galvanized pipe and sealtight.  In residential services required 2 men and involved replacing service mast, weather head, meter enclosures and panels.  Cutting, threading pipe, bonding and securing using 1 1/2" pipe, straps, and bonding bushings led to passing inspection.  Roughing out houses according to the NEC code gave the resisdential experience I needed.  BX or Armored cable was installed neatly running on 90 degrees and used BX staples as well as anti-short bushing and made sure BX was installed at least 1 1/2" away from the edge of the beam to avoid future problems.

What are the differences between Electrical Engineering, Electrical Engineering Technology and Drafting?

     Electrical Engineering is more theoretical and employs higher - level math and physics, to prepare you for a career in product design or systems research.

     Electrical Engineering Technology gives you more practical experience with the installation, maintenance and operation of components and instruments.  It also bridges the gap between technicians or Electricians and Engineers with an understanding of both operations and design.  Technology combines an understanding ot theory and design with hands on operational experience.

    Drafting is important between great ideas and actual products, building, processes or services.  Drafting is a universal method of communication that is understood by technitians, engineers, designers and architects all over the world.

     Both Electrical Enginnering and Technology can be accredited by . The IEEE is a very helpful site as well. 





  The History Channel had an exciting series for anyone who is interested in The "Men Who Built" America.  In the third part of the mini series you will learn about how Thomas Edison and JP Morgan teamed up to become the first to introduce Electricity to the nation.  Thomas Edison who believed DC was safer than AC lost his edge when his helper Tesla who believed in AC left and teamed up with Westinghouse (an investor).  The battle over who will control the Electric market began.  Tesla and Westinghouse lit up Chicago for a third of the price that Edison and Morgan would have which later Teslas AC would have won the Niagra Falls Contract.  Edison besides creating motion pictures created the Electric Chair to prove that AC was dangerous said he would create it as long as AC is used to power thus hopefully discrediting Teslas AC saying it was dangerous which backfired on Edison and JP Morgan.  JP Morgan than bought out Edison behind his back to gain control of the company thus changing the name to General Electric.  JP Morgan later tells Westinghouse he will take them to court unless Tesla gives up AC patents and Niagra Falls Contracts to JP Morgan inorder to light up the Eastern seaboard.  Westinghouse and Tesla cannot afford the court cases and are forced to give up.  A very different time but not so different.   History shows us a very hard game in the past.