Michigan Electrical Sign Contractor License Study Guide Exam 2026 Complete Questions with Detailed Verified Graded A+ Pass Guaranteed

Michigan Michigan Electrical Sign Contractor License Study Guide Exam 2026 Complete Questions with Detailed Verified Graded A+ Pass Guaranteed A receptacle supplying power to a furnace, is required to be powered by what type of electrical circuit?(your first thought dedicated)422.10(A) "Individual" circuit What is the REQUIRED minimum wire size for a ground ring? #2awg The inside of conduit, in a wet location, is considered to be ? 300.9 Wet FLC are motor table for single phase is found where in the NEC? 430.248 FLC are motor table for two phase is found where in the NEC? 430.249 FLC are motor table for three phase is found where in the NEC? 430.250 FLC Direct current motor table is found where in the NEC? 430.247 Ferrous(iron-magnetic) enclosures are connected to a non continuous ferrous raceway. Raceways must be bonded to electrical enclosures- HOW? 250.64(E) Electrically bonded through and at each end of a non continuous raceway to the enclosures Electrons move in which direction? Negative to Positive Fuses for overload protection may be used in what type of circuit? 430.36 3 wire,3 phase,1 conductor grounded Michigan Michigan The 2009 MRC requires AFCI protection where?E3902.11 only in bedrooms(one and two family dwellings) What motor currents are printed in the NEC: FLA or FLC FLC (full load current) what is the circular mil (cmil) area for stranded conductor with a diameter of 0.260 inches...chapter 9 table 8 (1cmil=cir area of .001 inch diameter) 52,620 cmil where can you find conductor cmil area and diameter? chapter 9 table 8 There are three resistors connected in series values = R1 60ohms, R2 5ohms, R3 15ohms, What is total resistance? 80ohms A 120v circuit has total resistance value of 80ohms, calculate the total current of the circuit....EoverIR 120/80= 1.5A a solid wire has a diameter of : 0.102 inches, it has a circular mil area of ? chp9 table 8 10,380 cmils "voltage drop is equal to what formula (from the EIR circle) E=IxR 1200mA is equal to how many amperes, to find this out you simply move the decimal place over how many spaces? 1.2, 3 spaces 120ac volts, is equal to how many peak ac volts? 170v(peak volts) a electrical circuit operates at 120V with a current of 4A, what is the calculated resistance of the circuit? R=E/I 30 ohms how many watts is 3.75kw 3750 watts In a series circuits, the same amount of ? flows thru each series resistor. current Michigan Michigan In a 120v series circuit, with three resistors connected in series R1=60 R2=5 R3=15 with a total circuit current of 1.5A. How much current passes thru resistor R2? 1.5A In a 120v series circuit, with three resistors connected in series R1=60 R2=5 R3=15 with a total circuit current of 1.5A. How much is the voltage drop across R2? Remember power circle...ohms law...E=IxR 7.5V conduit threads cut in the field must be coated with a compound that is?300.6(A) electrically conductive and non corrosive Can a master electrician pull a electrical permit? no A contractors license mst be qualified by a valid? master electrician license Two 40 ohm resistors are in parallel. what is the total resistance? 20 ohms In a series parallel circuit R1 & R2 in parallel both= 40 ohms and in series R3=15ohms. What is the total resistance of the circuit and how do find it? 35 ohms, so series TR=15 and Parallel TR=20, simply add the two totals together circuit operates at 5 Amps at a voltage of 120 ac. what is the power of the circuit? use pie... note this circuit has no induction coils...so the real power is also the answer 600 VA or 600 W A 3 phase circuit operates at 208 ac volts and with a current of 9a. what is the power in watts? use pie but dont for get to use the the square root of 3 too (1.7) and always round.. 3,186w also VA when finding what the power is in a 3 phase circuit what is the rule? voltage must be adjusted by multiplying the circuit voltage, by the square root of 3(1.7) how many amperes is 1200mA equal to? just move decimal place 3 spaces... 1.2 A In a 120v series parallel circuit R1 & R2 in parallel R1=20 R2=30 and in series R3=18, what does parallel resistance equal? and how do you find it? Michigan Michigan 12 ohms, R1xR2/R1+R2=Parallel Resistance In a 120v series parallel circuit R1 & R2 in parallel R1=20 R2=30 and in series R3=18, what would be your total circuit resistance? and how do you find it? 30 ohms In a 120v series parallel circuit R1 & R2 in parallel R1=20 R2=30 and in series R3=18, how much is the voltage drop across R3? How do you find it? 72v, -I=E/R =120 /30=4,-E=IxR=4x18=72v across R3 what is the resistance of 1200ft of strand(1kFT) x the wire size 1.2(1200ft) 0.97 ohms what is the resistance of 600ft of uncoated #10 AWG solid wire? chapter 9 table 8 0.73ohms using the electrical codes number rounding rule what would 417.018 be and 1.732? 417.08, 1.7 how many #1 THWN conductors can be installed inside : 1 1/4" rigid-schedule 40-pvc annex c table c.10 3 #4/o RHW aluminum service conductors are installed inside rigid metal conduit-what is the minimum size (RMC) permitted? annex c.8 3 1/2" at 3.98kw- 3 phase a kitchen stove operate at 230 ac volts at how much is the current?use pie since 3 phase then multiply voltage by 1.7 10.18 A What code section refers to journeyman/master to apprentice ratio? 339.5717 What type of metallic conduit/material shall be used for wet niche location? 680.23(B)(2)(a) brass, or other approved corrosion-resistant metal On an outside electric car charger how close can the coupling be from the ground? 625.50 24" What is the max length cord and plug for a permanently installed pool?680.7(A) Michigan Michigan 3 ft A concrete-encased electrode shall consist of at least how many feet in length? 250.52(A)(3)(1) 20 ft In the circuit below, what is the voltage drop across both R1 and R2? 48V What is the requirement for a floor box? 314.27(B) Box specifically listed for this application A 30amp branch ckt can be used for fixed lighting if on a ? 210.23(B) heavy duty lamp holder For finding current for for nm cable which degree chart do you use? 334.112 90 degree C chart a support for mineral cable should be ?ft from a panel 6ft mineral cable can be used for the following? 332.10(1) services, feeders and branch circuits single non-motor-operated appliance the over current protection shall be? 422.11(E)e3 150% exceeding current value What residential door, does not require a exterior light circuit? 210.70 a2 garage-vehicle door 120/240 electrical service, has a total balanced load of 5980 VA between is the balanced service load, on each side (A&B) of the service? 25A What is the smallest NM wire sizes, that can be attached to the bottom edge of a floor joist, in an unfinished basement? 334.15c (3) #8 In a raceway, what size conductors and larger, must be stranded? 310.106(C) #8 Regarding direct burial electrical cable, what does USE designate? underground service enterance Underground Rigid PVC, subject to damage,must be what minimum schedule?330.5D Michigan Michigan schedule 80 A 70 A feeder fuse, bonding on the load side, shall be no smaller than?table 250.122 key word "load side" #8 copper In a clothes closet, what style lamp is not permitted?410.8 pendent At a outlet, how much free conductor length is required?but if any dimension of the outlet opening is less than 8" then the minimum free conductor length, must extend at least ? outside the box opening 300.14 6", 3" What type of cable is commonly installed in dwellings? NM Holes are drilled into wall studs, the edge of the holes, are required to be no less than how many inches, to the edge of the stud (both front and back)If the required clearance is not available what do you install?300.4 1 1/4", protective nail plate What temperature column in 310.15(B)(16), is used to find the ampacity of NM cable? 60 degree C temperature column Grounding pipe and rod electrodes, must have how many feet in contact with the soil?250.53 8ft How many service disconnects may be grouped together?230.71 6 What is the maximum continuous current allowed on a 20A circuit?352.20 "continuous loads can not exceed 80% of a circuits rated current." 16A Smallest AWG size allowed to be installed in parallel circuits?310.10(H)(1) 1/0 AWG A bare aluminum grounding electrode conductor must be terminated a minimum of how far from the earth?250.64(A) no closer than 18" to the earth Michigan Michigan Coaxial and communication wire shall have a minimum voltage rating of? 300V Electrical outlets for appliances such as electric washing machine and dryers, are to be installed with in how many feet of the intended location?210.50 6ft AC systems between 50v-1000v shall be grounded when the voltage to ground does not exceed? 150v A hand hole in a metal light pole shall have a opening no less than?410.30(B)(1) 2"x4" A general use snap switch controlling a 1/2 Hp motor load,shall have a switch rating of at least? 430.109(C) 125% of the motor load A metallic screw to electrically connect a neutrals grounded bus bar to a CT cabinet is also called?250.28 a main bonding jumper What is installed on the ends of conduit to protect conductors form pulling abrasion? insulated bushings Maximum distance from heat and air conditioning equipment to a service receptacle? 210.63 25ft Thermal insulation installed above and surrounding a non IC lighting fixture (luminaire) shall not come closer to the enclosure than? 410.16(B) 3" Grounding electrode conductors smaller than #6 shall be? protected Ceiling light fixture (luminaire) may be supported by a strandard outlet box, if the luminaire does not weigh more than?314.27(B) 50 lbs Ceiling fan fixture may be supported by a standard outlet box, if the ceiling fan does not weigh more than? 422.18 Michigan Michigan 35 lbs 125 volt to ground service conductors over a pedestrian only walk way, must be a minimum height of? 10ft A mobile home outdoor service disconnect, must be a minimum of how many feet above the ground? 2ft How many current conductors are allowed in a metal auxiliary gutter before mandatory conductor de-rating required?366.22 30 150ft of PVC is installed where the ambient temperature changes from (0 degree F) to (+90 degree F). How much does the PVC length change? 5.5" A non motor appliance is rated at 13.6 amperes. what is the maximum OCPD permitted? 13.6X(150%)=20.4 "422.10(E)(3) 25A A non motor ckt with #10 AWG conductors is allowed to have a maximum what fuse (OCPD) size 30 amp Maximum % rate of fill, for cellular concrete raceways? (with more than two conductors)372.11 40% Electrical tubing (conduit) nipples,are defined as having a maximum length of ? 24" what is the maximum electrical fill rate, for conduit "nipples"? chp9 table 1 note 4 60% (4)"grounding"(EGC) conductors in a device box,for calculating cubic inch of volume of space, counts as how many conductors? 314.16(B)(5) 1 conductor What percent of a motors FLC, is multiplied to detrmine the motors minimum conductor ampacity? 430.22 Michigan Michigan 125% What EGC (equipment grounding conductor) size is required for a single phase motor that is protected by a 150A inverse time circuit breaker? #6 30 HP motor, 71.4 FLA, 230 V, 3 phase, separate overloads, 40 degree C rise what is the maximum overload size? 430.32 100A What THWN size wire and current rated ckt breaker is required to supply:10HP induction motor, 3 phase, 230V,75 degree C lugs? 10awg, 35A 3 phase circuit, 75 degree C THHW conductors (all the same AWG size and length) with 150A ocpds. What minimum AWG size conductors are required?310.15(B)(6) 1/0 AWG "Edison"base"plug" style fuses shall not exceed what voltage and shall not exceed what current? not over 125v and not over 30a In Michigan who must be present when electrical work is in progress? master or journeyman electrician A high impedance, grounded neutral system, is permitted for (3 phase) voltages of 480 to 1000v Conduit boxes must be fastened within what distance of junction and outlet boxes? 3ft Romex (NM), AC and MC must be supported within how far from outlet and junction boxes? 12" A circuit is supplied by a source not more than 100va and not mor than 30v is a? class 1,power limited circuit A outlet to service a rooftop A/C equipment shall be installed within? 25ft Minimum length and size for a ground ring?250.50 20ft, #2AWG Michigan Michigan Grounding electrode conductor sizing 4awg surge protective devices shall be connected to line and grounding conductors NO smaller than? #14 copper, #12 aluminum what size circuit breaker (inverse time) is required for a 3hp,230v,single phase motor? 430.248FLC x 2.5 430.52 next size up on 240.6 45 amps multiple grounding rod electrodes, shall be space apart a minimum of ? apart 6ft ckts supplied form a electrical source not exceeding 30v and 1000va is what class?725.21(A) class 1, power limited junction box to wet niche fixture, to be minimum of ?ft (horizontal) from inside of pool and min. height from bottom of box either ?in above ground/deck or ?in above water line? 680.24 4ft, 4in, 8in Wet-niche fiture min. of ?in below the water line 680.23(a)(5) 18in A non motor ckt, with 10 awg conductors, may have a maximum fuse ocpd of what size? 30a Reason for using type "S" fuse adapter? noninterchageable ampacities A metal light pole must a hand hole not less than?410.30 2"x4" what size grounding electrode conductors and smaller requires the conductors to be installed in either metallic conduit,metallic tubing,rigid nonmetallic conduit,EMT or cable armor? smaller than 6 awg what is the function of switch 'A' use ckt drawing stop what is the function of switch 'b' use ckt drawing Michigan Michigan start Isolating switches are accessible to who? Only qualified persons Small appliance branch circuits SHALL NOT supply _____? Switched lights Michigan