Michigan Master Electrician PREP TEST Q&A | VERIFIED

Michigan Master Electrician PREP TEST Q&A | VERIFIED 3 phase voltage drop - ANSWER 1.73 x K x I x L/A (K = resistance per foot, I = Current, L = length) Efficiency 3 phase - ANSWER HP(746)/1.73IE(pf) When equipment grounding is accomplished by means of an equipment ground, the size is determined from - ANSWER Table 250.122 Parallel conductors in nonmetallic raceway, grounding is determined by - ANSWER Table 250.122(F) When supplying power from a grounded system from one building to another on the same property, it's required by _____________ to run a separate equipment grounding conductor in addition to an insulated neutral - ANSWER 250.32(B) Code for Motor Branch Circuit - ANSWER 430 Motor Branch Circuit conductor size code - ANSWER 430.22 The ampacity of a #2 TW copper conductor is about _______% greater than a #6 TW copper conductor - ANSWER 170% (316.16) A permitted substitution for cable type FPL is - ANSWER CMP, CMR, CM (t760.154d) The primary of a transformer has 120 windings. The secondary has 24. This is a _____________ transformer. - ANSWER 5 to 1 A panelboard equipped with snap switches rated at 30 amps or less shall have ____________ of 2000 amperes or less - ANSWER overcurrent protection (408.36A) What size overloads are correct for a 5HP 230V motor with a nameplate FLC of 22 amps and a service factor of 1.2? - ANSWER 27.5 amps What is the minimum allowed fusible disconnect for a three phase 480v 15HP motor? - ANSWER 25 (t430.52) Kilowatts - ANSWER E x I x 1.73 x PF/1000 KVA - ANSWER E x I x 1.73/1000 HP (output) - ANSWER E x I x (EFF) x PF x 1.73/746 Amps when HP is known - ANSWER HP746/E x EFF x PF x 1.73 Amps when kilowatts are known - ANSWER KW(1000)/E x PF x 1.73 Bends in broadband network cable shall not _______________ - ANSWER damage the cable (830.160) Can four #3 THW Cu conductors be added in a 2" RMC with five #4 RH conductors - ANSWER Yes (Ch 9 T4 T5) Underground conduit entering a building must be _____________ - ANSWER Sealed GFCI protection shall be provided for outlets not exceeding 240 volts that supply boat hoist installed in dwelling unit locations - ANSWER 210.8 (c) Loads for additions to existing installations (dwelling) - ANSWER 220.16 (A) PVC expansion table - ANSWER Table 352.44 Equipment bonding jumper to 200 amp sub panel fed with 4/0 - ANSWER Table 250.122 #6 copper and #4 aluminum Grounding electrode conductor to building steel for 1200 amp service - ANSWER Table 250.66 Separation of conductors class 2 from 120 volt - ANSWER 725.136 Furnace own branch circuit - ANSWER 422.12