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Discussion Starter · #1 · (Edited)
I have a couple questions based on this motor diagram from the OESC section 28, I am struggling with the calculations



1. What size and type of copper conductor is required for this motor?
- so far i have 200% for continuous duty.

2. What is the maximum calculated value of trip setting for the overload relays?

3. What is the maximum calculated value of fuses allowed for over load protection?

Please provide code reference and explanation as well.
Thankyou
 

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Electrical Contractor
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5,504 Posts
I have a couple questions based on this motor diagram from the OESC section 28, I am struggling with the calculations



1. What size and type of copper conductor is required for this motor?
- so far i have 200% for continuous duty.

2. What is the maximum calculated value of trip setting for the overload relays?

3. What is the maximum calculated value of fuses allowed for over load protection?

Please provide code reference and explanation as well.
Thankyou
Rules 28-106, 28-200, and 28-208 and Table D16
 
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Electrical Contractor
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5,504 Posts
Thank you
No problem.
When you start to look up your rules, remember the appendixes and tables in the back. A good resource
Good luck on your pre-apprentice studies
 
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