143 S5 Conduit Fill factor

What is the definition of conduit fill factor?

• A) The amount of current a conduit can carry safely
• B) The percentage of the area inside a conduit that can be occupied by cables
• C) The maximum length of conduit allowed in a building
• D) The number of bends allowed in a conduit

Conduit fill factors are based on which of the following?

• A) Cable color
• B) Cable material
• C) Cable's outside diameter and conduit's inside diameter
• D) Cable's length

Why are fill factors important?

• A) To prevent physical damage to cables during installation
• B) To prevent damage from heat energy
• C) Both A and B
• D) Neither A nor B

Which organization provides guidelines for conduit fill factors?

• A) IEEE
• B) IEC
• C) NEC
• D) ISO

What happens if too many cables are pulled through a conduit?

• A) The cables become stronger
• B) The cables may get damaged
• C) The cables become more flexible
• D) The cables become less conductive

What is the purpose of the conduit fill factor in relation to pulling tension?

• A) To increase pulling tension
• B) To decrease pulling tension
• C) To distribute pulling tension evenly among cables
• D) To prevent pulling tension

How does exceeding the conduit fill factor lead to heat generation issues?

• A) It causes cables to become hotter
• B) It prevents heat dissipation
• C) It increases heat dissipation
• D) It has no effect on heat generation

Which of the following is a consequence of excessive heat buildup in a conduit?

• A) Increased cable flexibility
• B) Increased cable strength
• C) Increased risk of fire
• D) Decreased risk of fire

What are some factors that can affect the maximum recommended fill factor?

• A) Application type
• B) Types of cables
• C) Number of conduit bends
• D) All of the above

What is the maximum fill factor for one conductor?

• A) 53%
• B) 31%
• C) 40%
• D) 60%