Electrician (ELE)

Third Period Package (25 Modules) Comments

Date: 5/21/2021 11:59:38 AM
Module: 030301d
Version: 21
Page: 47
Comment: The last paragraph, below Figure 53, references Rule 4-038 (4) of the Canadian Electrical Code. Please change the Rule to 4-032 4) to reflect the change in the 2018 edition. Thank you.
Status: Update in Progress

Date: 11/7/2019 12:10:03 PM
Module: 030302a
Version: 21
Page: 33
Comment: The formula to calculate inrush VA is incorrect. Based on the the formula, the larger the motor the smaller the inrush VA would be. Example is if you have a 10 HP motor the inrush will be 10 times less than a 1 HP motor. The KVA required to start a motor is simply KVA multiplied by it's HP.
Status: Approved for Review

Date: 5/26/2021 8:02:36 AM
Module: 030302a
Version: 7
Page: 26
Comment: This module conflates the direction of induced current flow with the direction of electron flow. Electrons have negative charge, and so the direction they flow in is the direction of negative current, which is opposite to the direction of positive current. Consider for example questions 2 and 3 of Objective Three exercise. They are essentially the same question, but the answer given for question 3 is the opposite of the answer given for question 2. Please correct this conflation; direction of induced current is *not* the same as the direction of electron flow.
Status: Declined

Date: 5/21/2021 11:49:16 AM
Module: 030302b
Version: 8
Page: 7
Comment: The reactance of the rotor is mostly inductive reactance because the rotor's capacitive reactance is miniscule" An induction motor does not have any capacitive reactance because it doesn't have a capacitor. Cap-start motors haven't been introduced yet other than a brief sentence in 2nd year for series RLC. Please remove or change to the rotor's reactance is all inductive reactance.
Status: Implemented

Date: 5/26/2021 8:05:46 AM
Module: 030302b
Version: 21
Page: 25
Comment: 030302b – Page 25 – Table 5 – Breakdown torque values are backwards. In order to be consistent with Module A and the info in module B, it should be: Design A - Normal Breakdown Torque Design B - Normal Breakdown Torque Design C - High Breakdown Torque Design D - Very High Breakdown Torque
Status: Update in Progress

Date: 5/26/2021 8:05:56 AM
Module: 030302b
Version: 21
Page: 37
Comment: Page 27 – Question 3 – Answer Key Page 37 – The answer for question 3 should be D
Status: Implemented

Date: 9/16/2021 3:55:23 PM
Module: 030302b
Version: 23
Page: 9
Comment: Table 2. Formula 4th row. rotor speed should be: N.r = N.syn - N.s slip speed can be added : N.s = S x N.syn
Status: Approved for Review

Date: 9/16/2021 3:55:00 PM
Module: 030303a
Version: 23
Page: 28 and 29
Comment: Figure 28 and 31. When referring back to these diagrams from Autotransformers module, the current direction arrows are totally opposite direction. When H and X terminals are not jumpered, then yes the induced voltage and current directions of the mutual inductance transformers would be correct. But when joined, the current direction flow will be based on the resultant voltage, which is incorrect according to the diagrams. I dont believe these diagrams are trying to convey actual current flow direction so maybe changing the labelling from 'current flow' to 'voltage polarity' is better. I could be missing something here, but the madness in my head says something is wrong here.
Status: Approved for Review

Date: 5/27/2021 7:22:05 AM
Module: 030303d
Version: 21
Page: 17
Comment: The second last bullet point references Rule 4-038(4) of the CEC. Please change it to Rule 4-032 4) to reflect the change in the 2018 edition. Thank you.
Status: Implemented

Date: 5/21/2021 12:01:37 PM
Module: 030303e
Version: 21
Page: 8
Comment: The first paragraph provides a reference to CEC Rule 4-038, subrules (4) and (5). Please change it to Rule 4-032 to reflect the change in the 2018 edition. The subrules remain the same. Thank you.
Status: Update in Progress

Date: 5/26/2021 8:08:35 AM
Module: 030304b
Version: 11
Page: 43
Comment: Question 6 is okay. The 5 to 1 ratio is not needed to answer the question but having it there just makes the student think more. The ratio indicates that the transformer is a delta-wye connection. If you work through the question using the current values you will still get the correct answer. However, the code states that the secondary conductor ampacity is calculated by multiplying the primary conductor ampacity by the voltage ratio which is 600/208 = 2.885.
Status: Update in Progress

Date: 5/26/2021 8:08:48 AM
Module: 030304b
Version: 11
Page: 43
Comment: I would like to ammend my comment that starts "Question 6 is okay". I think the 5 to 1 ratio should be removed because this is a code question not a theory question. Knowing that the transformer is a delta-wye connection is not needed to determine the conductor sizes.
Status: Update in Progress

Date: 2/19/2021 9:15:21 AM
Module: 030304e
Version: 21
Page: 2
Comment: The default NOTEs on page 2 should be changed from Class A Motor to Class B motor because the B type is absolutely the MOST common rotor type B AND insulation class B. If there is yet another classification method of motors, I am unaware of it and it is not described in any of the other ILM modules. Also, Figure 3 from this module shows a 480 Volt CONTROL CIRCUIT which is ridiculous because the default would be a 120 Volt control circuit supplied through a control transformer for 3 phase motor starters of 460 V or 575 V motors.
Status: Approved for Review

Date: 5/26/2021 8:10:01 AM
Module: 030304e
Version: most recent
Page: 1
Comment: Objective 3 states “Determine the maximum allowable ampacity of an overcurrent device for a group of motors”; however, the term “ampacity” is used incorrectly as “allowable ampacity” is for conductors, not overcurrent devices. That phrase is right from the title of Table 2. This objective should be reworded as “Determine the maximum ampere rating for an overcurrent device required for a group of motors”. This wording would match well with the wording of Objective 6 in the “Individual Motors” ILM (030304d).
Status: Declined

Date: 5/25/2021 2:39:29 PM
Module: 030304h
Version: 8
Page: 7
Comment: Rule 2-112 is incorrect. Should be rule 2-116 Corrosion Protection for Materials Used in Wiring.
Status: Implemented


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