2021 - 13 - ELAP 105 - Basic Code STUDENT Package 03.29.2023

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Basic Code ELAP 105 BASED ON THE CEC 2021 …03.29.2023 2023 Humber School of Applied Technology Electrical Apprenticeship
Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 1
Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 2 Table of Contents Page Introduction to the Electrical CE book 3 How to use the Electrical Safety Code Book 4 Symbols and conversion factors for SI units - Assignment No. 1 5 Object, scope, and definitions - CEC Section 0 - Assignment No. 2 6-7 General Rules - CEC Section 2 - Assignment No. 3 8-9 Wiring methods - CEC Section 12 - Assignment No. 4 10-14 Services and service equipment - CEC Section 6 - Assignment No. 5 15-17 Class 1 and Class 2 circuits - CEC Section 16 - Assignment No. 6 18-19 Conductors - CEC Section 4 - Assignment No. 7 20-24 Marked Termination Temperature - CEC Rule 4-006 1) 21 Circuit loading and demand factors - CEC Section 8 - Assignment No. 8 25-31 Grounding and bonding - CEC Section 10 - Assignment No. 9 32 Installation of electrical equipment - CEC Section 26 - Assignment No. 10 33 Installation of lighting equipment - CEC Section 30 - Assignment No. 11 34 Fire alarm systems, smoke and carbon… - CEC Section 32 - Assignment No. 12 35 Pools, tubs, and spas - CEC Section 68 - Assignment No. 13 35 Temporary wiring - CEC Section 76 - Assignment No. 14 36 Marked Termination Temperature – Ontario ONLY - OEC Rule 4-006 1) 37 ESA Bulletin 4-12-4 Temperature Limitations For more information, please contact ron.granelli@humber.ca
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 3 Introduction to the Canadian Electrical Code The Canadian Electrical Code ( CEC ) provides safety standards for installation and maintenance of electrical equipment to prevent electrical fire and shock hazards. Codes are standards that deal with safety issues and are enforceable by law. The object of the CEC is to keep the electrical industry standards high to prevent fire and shock hazards and it is not intended as an instructional manual for the untrained. The CEC is a minimum requirement and anything you do above it is making provisions for future growth. The CEC provides us with direction and guidance on how to achieve safe electrical wiring and equipment installations. The preliminary work in preparing the CEC was first introduced in 1920 and its intention was to maintain an industry standard. Sections 0 to 16 and 26 are considered general sections, and the other sections are supplement or amend the general requirements of this code. Changes that have been made to previous codes are designated by the delta ( ∆) triangle symbol in the margin. (See Preface in the CEC ) The appearance of the CEC is very intimidating there are several hundred pages; just keep in mind that this is an instruction manual and not something you want to read cover to cover.
Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 4 H OW T O U SE T HE E LECTRICAL S AFETY C ODE B OOK The five steps listed below will help you breakdown a question or problem that has a solution in the Electrical Safety Code. They are as follows: Step No. 1 LOOK FOR A KEY WORD OR WORDS IN THE QUESTION TO USE IN THE INDEX. Pick a keyword that describes what you want to know about the main keyword. Use the keywords in the index to find the appropriate Rule Number that answers the question. Example: Luminaires in damp or wet locations Main Keyword is Luminaires – describes that it is in a wet location. Step No. 2 USE THE DEFINITIONS IN SECTION 0 TO HELP DESCRIBE THE MEANING OF WHAT IT IS YOUR LOOKING FOR. Example: See the definition of the word Luminaire — a complete lighting unit designed to accommodate the lamp(s) and to connect the lamp(s) to circuit conductors. Step No. 3 SCAN THE HEADINGS OF THE RULES TO FIND THE APPLICABLE RULE. Example: Use the index to get close to the proper section, and then scan the headings in that section. Headings will be in bold letters. Put the above steps to the test. Try the two following questions using the Electrical Codebook. 1. Where shall the disconnecting means for a distribution transformer be located? Key Word …transformers …asking the location of disconnecting means. CEC Rule 26-248 Shall be located in the primary circuit of each power transformer. 2. How many equivalent ninety degree bends are allowed in a raceway between outlet boxes? Key Word …raceway …asking about equivalent bends CEC Rule 12-942 Not more than 4 - 90 degree bends, including the bends located at an outlet or fitting.
Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 5 Symbols and conversion factors for SI units - Assignment No. 1 With reference found between the Table of Contents and Section 0 in your codebook, convert the following. If necessary, round off to three decimals spots. a) 324 feet = __________________metres b) 278 metres = ______________ feet c) 3000 square feet =_______________metres squared d) 637 m 2 = ___________________ square feet e) 300 mm = _____________ inches f) 4 inches = ______________ mm g) 34 foot-candles = _____________Lux h) 75 kgs = _______________ lbs i) 21 mL= _______________ cubic inches j) 60 degrees Fahrenheit = __________________degrees Celsius (temperature)
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 6 Object, scope, and definitions – CEC Section 0 - Assignment No. 2 1. State the object of the electrical code? 2. State the 5 areas not covered of the electrical code? a. b. c. d. e. 3. Briefly define the following terms; a. Conductor: b. Ampacity: c. Bonding: d. Conduit: e. Grounding: f. Neutral:
Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 7 Object, scope, and definitions – CEC Section 0 - Assignment No. 2 g. Identified h. Circuit breaker: i. Low Voltage: j. Raceway: k. Multi-wire branch circuit: l. Overcurrent device: m. Service Box: n. Washroom: o. Bathroom
Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 8 General Rules – CEC Section 2 - Assignment No. 3 1. What are the five main areas (main headings) in Section 2 of the Canadian Electrical Code? I. II. III. IV. V. 2. When shall a permit be obtained with respect to an alteration? Rule Answer: 3. Where must a permit be posted? Rule Answer: 4. How shall a service box be marked? Rule Answer: 5. Can wooden plugs be used for the support (anchoring) of electrical equipment? Rule Answer: 6. Must the nameplate on equipment remain accessible after installation? Rule Answer: 7. May Non-Metallic Sheath Cable (NMSC) cable be installed in contact with thermal insulation? Rule Answer: 8. What must be done when electrical cable passes through a fire separation? Rule Answer:
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 9 General Rules - CEC Section 2 - Assignment No. 3 9. Electrical wiring and cables installed in a non-combustible building should have what type of rating? Rule Answer: 10. What type of insulated electrical cable is required when used in direct sunlight? Rule Answer: 11. Can a repair on a piece of live electrical equipment be disconnected if there were no way of turning it off? Rule Answer: 12. Name two types of switches that are not considered for disconnecting means. Rule Answer: 13. What is the minimum working space around electrical equipment? Rule Answer: 14. Is it Ok to use an electrical room housing electrical equipment as a storage room? Rule Answer: 15. What is the minimum distance between the connection box of an air-conditioner and the vent of a gas meter? Rule Answer: For natural gas ___________m For propane gas __________m 16. Which type of enclosure for electrical equipment should be used where the enclosure is in a car wash where splashing and hosedown of equipment may occur? Rule Answer:
Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 10 Wiring methods - CEC Section 12 - Assignment No. 4 1. In an underground installation, what is the minimum required depth of NMWU cable rated at not more than 300 volts between any two conductors can be installed under a driveway with no mechanical protection? Rule Answer: 2. In an underground installation, direct earth burial cables must have how much screened sand above and below the cable? Rule Answer: 3. In an underground installation, at what depth must a suitable marking tape be buried? Rule Answer: 4. Where underground raceways or cables are subject to movement by settlement or frost, what provisions shall be made for the prevention of damage to the conductors, conductor insulation, or the electrical equipment. Rule Answer: 5. What is the minimum size ungrounded or grounded conductor that may be run in parallel? Rule Answer: 6. What table is used for flexible cord types and what usage type is flexible SJ extension cord? Rule Answer: 7. Where are flexible cords not permitted to be used? Rule Answer: 8. What is the minimum distance NMSC (non metallic sheath cable) must be kept from heating ducts? Rule Answer: 9. Can non-metallic sheathed cable be imbedded in plaster? Rule Answer:
Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 11 Wiring methods - CEC Section 12 - Assignment No. 4 10. What is the minimum distance between the edge of a wooden member and a NMD90 cable running through it? Rule Answer: 11. What is the maximum voltage rating of AC 90 cable? See Table D1 in Appendix D Answer: 12. In a building that is non-combustible construction, can number 12/2 AC90 be buried in the plaster finish from an existing outlet to new outlets? Rule Answer: 13. After an armoured cable is installed in a box, must the insulating bushing or equivalent be visible to the inspection department? Rule Answer: 14. Should an open flame be used to make field bends in PVC conduit? Rule Answer: 15. State the maximum expansion in PVC conduit without an expansion joint. Rule Answer: 16. What is the minimum number of expansion joints required for a 30-metre length of PVC that is grouted in concrete? The maximum range of the expansion joint is 100 mm. Rule Answer: 17. What is the minimum number of expansion joints required in a 40 m run of Rigid PVC Conduit in an area where the minimum expected temperature of the installation is -30 °C and the maximum expected temperature of the installation is 40 °C. The maximum range of the expansion joint is 100 mm. Rule Answer: 18. What is the largest size of copper conductor that can be installed in wireway? Rule Answer:
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 12 Wiring methods - CEC Section 12 - Assignment No. 4 19. What is the minimum size rigid metal conduit that would be required to install 9 - No. 12 T90 nylon stranded copper conductors? Rule Tables Answer: 20. What is the minimum size rigid PVC conduit that would be required to feed a 400 A 3-phase 4- wire service? The conduit contains 4 - No. 600 Kcmil RW90XLPE 600V unjacketed copper conductors? Rule Tables Answer: 21. What minimum size electrical non-metallic tubing is required for 1–No. 14 T90 bonding conductor, 6-No. 14 T90 Nylon and 6-No. 12 T90 Nylon copper conductors? Consider all wiring to be stranded. Rule Tables Answer: 22. How many maximum No. 10 TW75 insulated stranded copper conductors are permitted in a 21- trade size EMT? For the purposes of raceway fill, consider at least three or more conductors installed in the raceway Table Tables Answer:
Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 13 Wiring methods - CEC Section 12 - Assignment No. 4 23. When calculating the number of insulated conductors in a box which rule describes what is to be counted as a conductor? Rule 24. What minimum size octagon box would be required to accommodate at least 11 - No. 14 AWG copper conductors? Table Answer: 25. What is the minimum size square box that contains 4 - No. 14 AWG and 4 - No. 12 AWG copper conductors going straight through the box with no conductor connectors. Tables Answer: 26. What minimum size square box would be required for the above question if all the conductors were spliced in the box using conductor connectors? There are 8 conductor connectors used. Tables Answer: 27. How many No. 14 AWG copper conductors are permitted in a round 4x1/2 box? Answer: 28. What minimum device box would be required to accommodate 8 - No. 14 AWG copper conductors? Table Answer: 29. There are 6– 14 AWG copper conductors entering a device box that contains a receptacle and 3 - bare copper bonding conductors pig tailed under 1 - solderless wire connector. What minimum size device box would be required? Table Answer: Which table gives: a) Space for insulated conductors in boxes. Table b) Number of insulated conductors in boxes. Table
Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 14 Wiring methods - CEC Section 12 - Assignment No. 4 30. How many cubic inches are there in an 8 x 8 x 4 pull box? Answer: 31. In the question above convert the cubic inch capacity of the pull box into millilitres. Answer: 32. How many No. 14 AWG copper conductors without a splice are permitted in an 8 x 8 x 4 pull box/ junction box? Answer: 33. At what minimum size AWG insulated conductor or larger must pull box sizes be calculated? Rule Answer: 34. A pull box contains conductors that are either the same or larger than No. 4 AWG. If the box had a 53-trade size conduit on the left side and a 53 trade size conduit on the right side, what minimum distance must the box require from edge to edge for a straight pull? 35. There are 4 - No. 3 T90 nylon copper conductor’s run in 35-trade size using EMT. The conductors enter and leave the top of the box. What minimum distance would be required to the opposite wall of the box and at what distance apart must the two raceway be from each other?
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 15 Services and service equipment - CEC Section 6 - Assignment No. 5 The Code uses two terms to describe different applications of service entrance equipment: “consumer’s service” and “supply service”. The “supply service” conductors belong to the supply authority , and the supply authority is responsible for servicing and maintaining these conductors after their initial installation. While the initial installation can be done by either the supply authority or the customer, the final connections are done by the supply authority. The “consumer’s service” refers to the portion of the consumer’s installation from the service box or its equivalent up to and including the connection point of the supply authority . The consumer’s service, which includes conductors, provisions for metering equipment, and the service disconnect, brings electrical energy into the installation. It can then be distributed through distribution equipment to the individual branch circuits to meet the electrical requirements of the customer. January 2021 © 2021 Canadian Standards Association
Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 16 Services and service equipment - CEC Section 6 - Assignment No. 5 1. State the scope and the voltage limitations for this section. 2. How many supply services of the same voltage characteristics can be installed in a building that is a completely self-contained occupancy and is located one above the other? Rule Answer: 3. What is the maximum number of consumer’s service of the same voltage and characteristics permitted without special permission? Rule Answer: 4. Is it permitted to have a two wire service if only two branch circuits are required? Rule Answer: 5. What minimum clearance of conductors above finished grade passing over a pedestrian walkway? Rule Answer: 6. What is the minimum nominal trade size rigid metal conduit used for an overhead mast? Rule Answer: 7. How must the consumer service conductors of different polarities be arranged through a service head? Rule Answer: 8. How shall the conductors be arranged to prevent moisture and water from entering into the service head? Rule Answer:
Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 17 Services and service equipment - CEC Section 6 - Assignment No. 5 9. What is the minimum and maximum heights of the consumer service head located above the support of attachment? Rule Answer: 10. Can enclosures housing breakers be used as a junction box to tap off to other electrical equipment? Rule Answer: 11. What is the minimum length of consumer service conductors provided for drip loops? Rule Answer: 12. What is the minimum size AWG copper conductor that can be run overhead for a consumer service? Rule Answer: 13. What is the minimum nominal trade size raceway that can be used for a consumer service: Rule Answer: 14. What must be done to a consumer service raceway if it is terminated on top of a service box? Rule Answer:
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 18 Class 1 and Class 2 circuits - CEC Section 16 - Assignment No. 6 INTRODUCTION CLASS 1 AND CLASS CIRCUITS Section 16 is a general Section of the Code that applies to Class 1 and Class 2 circuits. These circuits are typically found in locations such as • industrial instrumentation systems; • building system monitors; • motor controls; • alarm circuits; • doorbells; • power door openers; • thermostats; • medical equipment; • power supplies used to recharge batteries and laptop computers; and • similar applications. The power supply and/or overcurrent protection associated with these circuits identifies significant differences between a conventional branch circuit and a Class 1 or Class 2 circuit.
Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 19 Class 1 and Class 2 circuits - CEC Section 16 - Assignment No. 6 1. Describe in your own words the classifications of Class 1 circuit extra-low-voltage power circuit. Rule Answer: 2. Is it permitted to run conductors of a Class 1 system with communication cables? Rule Answer: 3. May insulated power conductors be run in the same conduit as insulated conductors of Class 1 circuits? Rule Answer: 4. May Class 1 circuits extend aerially beyond a building? Rule Answer: 5. Describe in your own words the classifications of Class 2 circuits. Rule Answer: 6. The maximum size overcurrent device that may protect a Class 2 circuit operating at an open circuit voltage of 16 V? Rule Answer: 7. Do Class 2 circuits require overcurrent protection on the load side of the circuit? Rule Answer: 8. Where in Class 2 circuits must the code be followed in regards to location of overcurrent devices? Rule Answer: 9. May we support Class 2, type ELC ( E xtra- L ow-voltage C ontrol cable) conductors on nails and run them without mechanical protection? Rule Answer: 10. Must insulated conductors of Class 2 circuits be separated from insulated conductors of Class 1 circuits? Rule Answer:
Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 20 Conductors - CEC Section 4 - Assignment No. 7 State as necessary …Rule Numbers and/or Tables with your Answer 1. What is the smallest size of insulated copper conductor that can be used for lighting and power circuits? Rule Answer: 2. If tables 2 and 4 are based on not more than 3 conductors in a raceway. What would happen if there were 4 or more conductors in a raceway? Rule Answer: 3. There are 7 copper conductors in a raceway. What derating multiplier would be used to determine the ampacity of the conductors from Table 2? Rule Answer: 4. A raceway contains a white or grey covered neutral conductor that carries an unbalanced current from other conductors. For the purposes of determining ampacities of conductors in a raceway would the neutral count or not count for derating purposes? Rule Answer: 5. A raceway contains a white or grey covered identified conductor connected between a single breaker and the main service neutral. Would the identified conductor count or not count when determining ampacities for the conductors in the same raceways? Rule Answer: 6. What is the allowable ampacity of a No. 1 NS75 aluminum triplex neutral supported cable in an ambient temperature of 30 degree C? Rule Answer: 7. A raceway contains an insulated green; would this bonding conductor count or not count when determining ampacities for the conductors in the same raceways? Rule Answer: 8. Tables 1, 2, 3 & 4 are based on an ambient temperature of 30 0 C. What table will be used if the ambient temperature is higher than 30 0 C? Rule Answer: 9. Tables 1 and 3 are for allowable copper and aluminum single conductor in free air. What would happen if there were more than one conductor in contact with each other? Rule Answer:
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 21
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 22 Conductors - CEC Section 4 - Assignment No. 7 State as necessary …Rule Numbers and/or Tables with your Answer 10. Determine the maximum ampacities the following copper conductors run in separate raceways if there are not more than 3 conductors and connected to equipment with a marked equipment termination temperature of 75 0 C [see CEC Rule 4-006 1)]. I. No. 3 R90XLPE II. No. 8 TW60 III. No. 1 TW75 11. There are 3 - No. 12 R90 copper conductors in a raceway. What is the maximum ampacity of each No. 12 copper conductor? There is no information on the overcurrent device and equipment being used. [see CEC Rule 4-006 2)]. Rules Answer: 12. There are 10 - No. 10T90 nylon current carrying copper conductors in a raceway. What maximum ampacity can each No. 10 carry? There is no information on termination temperature for the overcurrent device and equipment being used. Rules Answer: 13. What would be the maximum ampacity of the No. 8 R90 copper conductor in the following raceway? The conductors are connected to equipment with a marked termination temperature of 75 0 C. The raceway contains a total of 8 conductors, 2 of which are neutrals: Rules Answer: 14. Calculate the ampacity of 22 - No. 10 RW90 copper conductors in a raceway, installed in an ambient temperature of 65 0 C. The conductors are connected to a piece of equipment with a marked termination temperature of 75 0 C. Rules Answer:
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 23 Conductors - CEC Section 4 - Assignment No. 7 State as necessary …Rule Numbers and/or Tables with your Answer 15. What maximum ampacity can a flexible 14/3 SJ 250volt extension cord carry? Rule Table Answer: 16. The identified conductor shall be installed at each location of a manual or automatic control device for the control of permanently installed luminaires at a branch circuit outlet. Rule True_________ or False ____________ 17. What is the maximum voltage between any two conductors for type LVT cable? Go to Appendix D Table D1 Answer: 18. A No. 2 copper neutral conductor for a 100 amp. service may be black provided it is painted or taped white or grey wherever the conductor is exposed? Rule True_________ or False ____________ 19. How must the identified conductor(s) of a multi-wire branch circuit be installed? Rule Answer: 20. Is it permitted to tape a No. 3 copper-bonding conductor green at both ends? Rule Answer:
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 24 Conductors - CEC Section 4 - Assignment No. 7 State as necessary …Rule Numbers and/or Tables with your Answer 21. What is the colour arrangement for a three-phase four-wire system? Rule Answer: 22. Determine the size of a RW90XLPE insulated copper conductors for a 600 amp, 120/240-volt, single-phase, 3-wire SERVICE? The installation is run underground using one conductor per phase installed in one PVC conduit. (see Diagram D11) (Voltage drop from rule 8-102 doesn’t apply) Rule Answer: 75 0 C equipment rating 90 0 C equipment rating 23. What size insulated RW90XLPE aluminum conductor would be required in the above question? Rule Answer: 75 0 C equipment rating 90 0 C equipment rating 24. Determine the size of a RW90XLPE insulated copper conductors for a 2000 amp, 347/600-volt, three-phase, 4-wire SERVICE? The installation is run underground using six conductors per phase and direct buried. (see Diagram D10) (Voltage drop from rule 8-102 doesn’t apply) Rule Answer: 75 0 C equipment rating 90 0 C equipment rating
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 25 Circuit loading and demand factors - CEC Section 8 - Assignment No. 8 State as necessary …Rule Numbers and/or Tables with your Answer 1. State the scope of work for CEC Section 8 2. What are the voltage divisors used for calculating currents in low voltage alternating current systems? Rule Answer: 3. What is the maximum demand load on a branch circuit and how is it calculated? The branch circuit has an unknown load. Rule Answer: 4. What is the maximum voltage drop in a feeder or branch circuit? Rule Answer: 5. If a fused switch is not marked suitable for continuous operation at either 80% or 100%. What is the maximum rating? Rule Answer: 6. A 20 A overcurrent device is feeding an unknown load with No. 12T90 copper conductor in a raceway. What is the maximum load under that can be installed on the overcurrent device under continuous operation? Rule Answer: 7. When a panelboard is installed in a new single dwelling installation must have how many minimum additional overcurrent device spaces left for future use? Rule Answer: 8. Is it permissible to have more than 12 outlets on a 2-wire branch circuit? Explain Rule Answer: 9. Determine the maximum number of LED pot lights rated at a maximum of 8W that are allowed on a 120 V, 15 A branch circuit: Rule Answer: Circuit loading and demand factors - CEC Section 8 - Assignment No. 8
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 26 State as necessary …Rule Numbers and/or Tables with your Answer 10. For the purpose to this section of the code, how is the area calculated for: Rule (a) ground floor ________________________ (b) above the ground floor used for living purposes _______________________ (c) below the ground floor ________________________ 11. Explain in your own words 8-200 1). Answer: 12. What is the demand rating of an electric range in a single dwelling that does not exceed 12KW? Rule Answer:
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 27 Circuit loading and demand factors - CEC Section 8 - Assignment No. 8 State as necessary …Rule Numbers and/or Tables with your Answer General Information not given in the electrical code. • Service Sizes available are 60, 100, 125, 200, 225, 400, 600, 800 and 1000A. 13. Calculate the minimum size consumer service and copper TW75 consumer service conductors required for a house that has an inside measurement of 6 m by 12 m …there is NO BASEMENT. It has a 12KW range. The consumer service is 120/240 V single-phase. Equipment is marked with a maximum termination temperature of 75 0 C.
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 28 Circuit loading and demand factors - CEC Section 8 - Assignment No. 8 State as necessary …Rule Numbers and/or Tables with your Answer 14. What service equipment is required for a bungalow that has an area of 78m 2 inside dimensions with a basement of 30m 2 inside dimensions. It has a 12Kw range, 3Kw tankless hot water heater, 4Kw dryer, 7Kw electric heating and an air conditioning unit that draws 3Kw. The heating and air do NOT come ON simultaneously. The service is a 120/240volt single-phase system. Equipment is marked with a maximum termination temperature of 75 0 C. Calculate the following… (a) Minimum service size (b) Minimum size RW90XLPE copper supply service conductors (c) Minimum size copper grounding electrode conductor
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 29 Circuit loading and demand factors - CEC Section 8 - Assignment No. 8 State as necessary …Rule Numbers and/or Tables with your Answer 15. Calculate the service equipment required for a two-story house with a full basement? The area per floor is 90m 2 using inside dimensions. The house has a14Kw range and another range at 8Kw, a 3Kw electric storage water heater, a 4Kw dryer and 17K w of electric baseboard heaters with separately controlled stats in each room. Service voltage is 120/240-volt. Equipment is marked with a maximum termination temperature of 75 0 C. Calculate the following… (a) Minimum size service size (b) Minimum size RW90XLPE aluminum supply service conductors (c) Minimum size copper field-assembled grounding electrode
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 30 Circuit loading and demand factors - CEC Section 8 - Assignment No. 8 State as necessary …Rule Numbers and/or Tables with your Answer Methods using Table D3 …2 wire systems. The formula is given on Table D3 *note 9. x x x = x x = x Fill in the knowns in the blank spaces 16. Using rule no. 8-102 refers you to see Appendix D. Using Table D3 how far can a No. 12T90 copper conductor fed from a service box carry 16 A continuously @ 120volt rated at its maximum voltage drop? Distance shown on TD3 Maximum voltage drop 8-102(a) 3% for feeder or branch circuit ...use 3 (%) DCF – distance correction factor System voltage 120v Distance in metres Current A Copper Conductor size, AWG % allowable = actual load (A)/ allowable conductor ampacity (A) TD3 distance
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 31 Circuit loading and demand factors - CEC Section 8 - Assignment No. 8 17. A 120-volt sump pump is located 90 metres from the panelboard it serves. The maximum ampacity of the pump draws 8 A. Calculate the minimum size RW90XLPE copper conductor from Table D3 that will carry the required load at its maximum voltage drop? 18. What minimum size RW90XLPE copper conductors would be required for a 40 amp, 240-volt load that is located 140 meters from a distribution panel? The voltage drop is not to exceed 3%.
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 32 Grounding and bonding - CEC Section 10 - Assignment No. 9 1. What is the object and purpose of section 10? Rule Answer: 2. What are the three types of grounding electrodes available tor grounding an electrical system? Rule Answer: 3. What is the maximum distance between pull points can an uninsulated grounding conductor can be run in a raceway? Rule Answer: 4. What are some acceptable means a grounding conductor can be connected to a grounding electrode? Rule Answer: 5. In other than service equipment, how is the minimum size copper field-installed bonding conductor determined from Table 16? Rule Answer: 6. A branch circuit is protected with a 50 A circuit breaker using No. 8 T90 copper conductors. What minimum size field-installed copper-bonding conductor would be used if one were required in the raceway? Rule Answer:
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 33 Installation of electrical equipment - CEC Section 26 - Assignment No. 10 1. Where are panelboards not to be located? Rule Answer: 2. How are floor receptacles to be enclosed? Rule Answer: 3. What must be done when a grounded receptacle replaces an undergrounded receptacle? The area is completely finished and inaccessible to fish in a bonding wire. Rule Answer: 4. How are receptacles exposed to weather to be protected? Rule Answer: 5. What conditions must be meet with respect to receptacles used for maintenance of equipment located on rooftops? Rule Answer 6. How many receptacles must be provided on the exterior of a house that has 2 porches and 1 balcony? Rule Answer: 7. State the configuration of a receptacle for electric 120/240 V clothes dryer? Rule Answer: 8. How must a receptacle be installed for an electric range with a demand of less than 50amps? Rule Answer: 9. What type of portable cable is permitted to be used in a deep well submersible pump located in a well? Rule Answer: 10. Can a branch circuit feeding permanently connected data processing units be connected to other loads? Rule Answer:
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 34 Installation of lighting equipment - CEC Section 30 - Assignment No. 11 1. Where shall luminaires be mounted when installed in clothes closets? Rule Answer: 2. What is the minimum distance above the floor can a rigid luminaire be installed without mechanical protection? Rule Answer: 3. How shall lamps be guarded when installed in gymnasiums? Rule Answer: 4. How shall switches control luminaires installed near a shower or bathtub? Rule Answer: 5. What must be done to the ampacity of 90°C wire when used for the connection of ceiling outlet luminaires? Rule Answer: 6. What requirements must be made to lampholders when used in wet or damp locations? Rule Answer: 7. Recessed portion of every recessed luminaire enclosure shall be at least what distance from combustible material? Rule Answer: 8. May recessed luminaires be blanketed with thermal insulation? Rule Answer:
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 35 Fire alarm systems, smoke and carbon monoxide alarms… - CEC Section 32 - Assignment No. 12 1. How must stranded conductors with more than 7 strands be terminated in a fire alarm system. Rule Answer: 2. The power supply to a fire alarm system shall be clearly identified as the fire alarm power supply. What colour must the disconnecting means feeding the fire alarm equipment? Rule Answer: 3. Can permanently connected smoke alarms and carbon monoxide alarms be supplied from a GFCI or AFCI protected circuit? Rule Answer: 4. Can insulated conductors installed in a surface mounted non-metallic conduit be used to feed fire pump equipment? Rule Answer: 5. Does the equipment of a fire pump require overload protection? Rule Answer: Pools, tubs, and spas - CEC Section 68 - Assignment No. 13 1. Define wet-niche luminaire? Rule Answer: 2. The metal parts of the pool and of other non-electrical equipment associated with the pool must be bonded together within how many metres from the pool edge. Rule Answer: 3. What is the closest a receptacle can be located from the inside wall of a pool when protected by a Class A type ground fault circuit interrupter? Rule Answer: 4. What are the requirements when receptacles are located in wet areas of a building, and associated with the pool, such as locker and change rooms? Rule Answer: 5. Can communication cables be located direction over a pool at a clearance of 4.5 metres? Rule Answer:
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 36 Temporary wiring - CEC Section 76 - Assignment No. 14 1. State the types of flexible cords that are suitable to be used outdoors. Rule Answer: 2. May receptacles be installed in a branch circuit providing lighting? Rule Answer: 3. Describe the size of a distribution centre relative to the number of branch circuits. Rule Answer: 4. How are feeders to be protected? Rule Answer: 5. How shall service entrance equipment be installed in an outdoor location? Rule Answer:
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 37 Marked Termination Temperature – Ontario ONLY - OEC Rule 4-006 1) ESA Bulletin 4-12-4 Temperature Limitations For more information, please contact ron.granelli@humber.ca
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Electrical Apprenticeship Basic Code ELAP 105 1.0 Page 38 Notes
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