CODE ASSIGNMENT 1&2 SOLUTIONS

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Sheridan College *

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79802

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Electrical Engineering

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Apr 3, 2024

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Section Shel‘ ldan gregative ez TECH 10065, Code Assignment #1; Preface, Sections 0 & 2. I poun Define: Bonding o low {W\Tpede%ce pd‘(A o bt ed by ﬂei‘wwmem‘(‘ly 0ty el o~ Cuileat Carb iy e Tl /)axf+$ fo enguie elechrial c,onfiuv\(\Ly Y [«au(’vu;) the Co\paci\ty $o cyuluct Sc\(\e\v oy cupdent Likely %_(oec‘mpofefil omn T 2. (1 pomt Define: Outlet A4 Pbiw{’ in Hae T Ag) ?us+kll¢\-|».'o-/\ st whidla Co\rfen"' 3 faken 4o supply wti l cedon equ pmeﬂ"/‘ 3. (1 pomt) Define: Remote Control Circuit ( Car C(A;‘B A Blechrical ctrend Hat cudnls any other ciroat ‘\-\/\\!\OMV)L\ N \f(i(h\/ o™ AR %Mll/h,en‘f 0{8(/&&_ 4. (1 pomt) Define: Grounding A perwoment ¢ continuous contluctive ,chLL dy e ewrth with su(:(\(ue,\‘} oum\/)(,,c,{y to by Lo l4 u«H‘&n‘f huble + be fmﬂo}eﬂ o it o of svx@@fcieu“’l low impedence do limit e voltuge Tse ove o)aovw,lml Yo C‘ul fi*e tae 0{)(.101{‘()#\ ol %e ()m‘{eijf(ve o(ewces v Ye clreams 5. (1 pomt) Define: Branch Circuit ( C Qg *B over curveat gevice proYecting the cirenit N owtlets 6. (1 pomn 63 trade size (metric designator) conduit is equivalent to which imperial size of conduit? The table displaying this conversion is found on page 371 a. 3-1.27 c. 347 b. 1-147 . 2=127 7. (1 pomt) At each distribution point. (-}TL‘V\."L\O‘ Gﬂk*'.’%uses. and switches shall be marked in a clear and conspicuous manner what they protect or control and the maximum rating permitted. Code: Z~100 3>

Sher ldan g?éaitive o 8. (1 point) Can inspection refuse to approve an installation simply because it’s messy? 2 Code: QL ~31Y alYes ) b. No 9. (1 pont) Define: Identified (Applied to conductors) [\/t\r»{c of G&Qy %¢quch& 0F V\Qvéfib\\ 10. (1 point) List each of the general sections of the CEC. 0,246,501, (416, 2b 11. (1 point) May a type 3R enclosure be used outdoors? (a. Yes ) b. No 12. (1 pointy On January 27, 1880, Thomas Edison was granted a patent for the electric light bulb. In what year was it decided to print the first edition of the Canadian Electrical Code? Code: &_‘Lf_QD l\‘) C) Year: 1937 CEC pg. 3 L’ 13. @ pointy Do plans and specifications for wiring installations of public buildings need to be submitted to the local electrical inspection authority? Code: ;2”0 \Y 05 . NO 14. (1 pomnt) A pressure of 101.325 kilo Pascal’s (kPA) is equivalent to &% . qa- Inches of mercury. The conversion factor to answer this question was found on page: 3 { | K'va ® O.R"if > Ha a. 27.7 | c. 29.89 ) b. 3393 d. 14.696 15. (1 pointy Are wind proof motors marked WP? i Code: & “qb(’( '> l’) a. Yes b. No 16. (1 pont) Where non residential electrical equipment is likely to require maintenance, examination, adjustment or servicing while energized, what is required? Lol -w\wked ‘*\ deou‘[y U'ls\\o(fi Wt niny o“\ ek 4w £lash code: A~300

Sheridan | . TECH 10065, Assignment 2; CEC Section #4 Other 1. (1 pointy Which table is used to derate the values listed in tables 1 to 4 when high ambient temperatures (over 30°C) are a concern? o g A Code: M) L> (‘> (1 point) Which table is used to derate the values listed in tables 1 to 4 when the presence of more than three current carrying conductors in a raceway or cable is a concern? g-004 | CrS Tuble Sc 9 3. (1 pomt) Define: AWG Awerican Whre C;o\vw\e as appl\gd {eo now Qrc)(/\g covductors CU\VK AL \(U oug VV\QJW\ 4. (s pounts) Factors that must be taken into account when selecting conductor msulaflo‘lz inc /ude but aren’t limited to: List 5 \(»\Qkfilj CL(/ ) lux, %hv\w& M ‘fewwerm4ade bauo)& Code: Z’f -00 6 5. (1 pom Conditions of use and temperature ratings of wires and cables other than flexible cords and equipment wires can be found in: S =2 o £f Table: —l!—-'; ¢ Yes/No Indicate whether vou agree ith the statement. 6. (1 pomt) If the cord on an appliance isn’t long enough to reach the nearest receptacle. is it permissible to use a flexible cord (an extension cord) as a permanent means of plugging the appliance in? _ Code: /R‘ qo& 3) 7. (1 pont) May a conductor. required to be identified as a neutral conductor and larger than #2 AWG. be identified in the field by methods such as taping? , ' @ Code: - O Q 6 b, No

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Sheridan | .. Multiple Choice Identifi the choice that best completes the statement or answers the question 8. (1 pomty Under what circumstances may an identified (grounded) conductor be used as an ungrounded (live) conductor? a. Never d. With a cable or conduit when feeding power to a switch. Win a cable when returning power froma e. ._)\ switch to an outlet. Code: H - 03 O X, ¢. With a cable when feeding power to a switch. 9. (1 pomt) When may a grounded neutral conductor, #2 AWG or smaller be field identified where they are accessible and/or visible? a. Never d. _AVhen there are no longitudinal ridges. b. With a cable when returning power froma e. switch to an outlet. Code: L‘ - O akl ‘3\5 c. With a cable when feeding power to a switch. 10. (1 pomty When selecting conductor size based on a known load or ampacity, the temperature column of Tables 1 to 4 that must be used is based on: a. the termination temperature of the circuit d. all of the above breaker N @ the temperature rating of the conductor e. Code: l’l - OOL{ insulation ¢. the temperature rating of the load or outlet terminations Completion Complete each statement 11. 4 pomts) List the tables that provide the following information: Ampacity: Not more than 3 Copper conductors in raceway or cable. Ampacity: Single Aluminum conductors in free air. Ampacity: Single Copper conductors in free air. Ampacity: Not more than 3 Aluminum conductors in raceway or cable. NS

12. 13. 14. Tw(t ‘7: ( (;r):'~ 15. - = MR (7.\) ? Sheridan | i (4 points) List the tables that provide the indicated information: Type designations, voltage ratings & construction. building wires, other l than flexible cord. D Conditions of use, temperature limitations, building wires & cables, not \q tlexible cord or equipment wire. Allowable ampacities, flexible copper conductor cord & equipment wire. l 52 Conditions of use, voltage & temperature ratings for flexible cords, \ \ equipment wires, etc. (s ponts) Indicate the wire identification colours that are to be used for the listed electrical systems. Ground Sre e 2 Wire, DC System Rl ic Ked 2 Wire, 1 Phase AC System Bl k LWhiie 3 Wire, 1 Phase AC System Plack Rel hWMNite 4 Wire, 3 Phase AC System Kelk 3 lec IC 2\ e Wt te Code: Ll ~03%x ?>> (1 pomt) Determine the ampacities of the listed copper wires in conduit at the stated ambient temperatures. Wire Calculation Ampacity T: ] T: 3 - #1250 kemil TW @ 50°C Line X €y AL 3 - 600 kemil TW75 @ 45°C HRO > & 24y 3-3/0RW90 @ 39°C 225 > ot 205 4 - #6 AWG (1 unbalanced current) T90 @ 34°C | 75> .56 X (4 pouts) Determine the ampacities of the listed copper wires in conduit at the list number of conductors per conduit. Wire Calculation Ampacity T | T; 28 - #12 AWG TW75 @ 30°C, 7 unbalanced current | @< X | LD 1S 12 - #4 TW75 @ 30°C 'S X M0 6O 6 - 30 RW90 @ 30°C 225 X g0 /40 7-#8 AWG T90 @ 30°C, | unbalanced current S M W PU g4 Aw ‘oo\lwced OlOeS u“\' (\)WJ‘ H-00d 3)

Sheridan | .. 16. (15 points) Determine the ampacities of the following conductors based on their insulation ratings, number of conductors in conduit, conductor element material and the ambient temperatures listed. Wire Calculation Ampacity CU - Copper: AL - Aluminum T: | T: . |[27-#8 AWG RW90 CU @ 56°C, 4 unbalanced current | § & X, D X - 16 A GO S[12-#2 AWG TWU, CU @ 47°C 60O x 720> 1) 30 6 - 2/0 AWG TW75, AL @ 38°C 125 Xx.80 % .%€ 95 ~ [20-350 kemil RW90, AL @ 43°C REO x 0 * 8 | 171 O —7[ 11 -#10 AWG TW, CU @ 52°C, 1 unbalanced current | 2() X.10 ¥ .S§ |

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