CSLB C-10 Electrical ContractorElectrical Theory and CalculationsHard
A conduit run includes four 90-degree bends between pull points. According to the NEC, what is the maximum number of additional 90-degree bends permitted in this run before a new pull point is required?
- A0 bends
- B1 bend
- C2 bends
- D4 bends
Show answer & explanationAnswer & explanation
Correct answer: A. 0 bends
NEC Section 358.26 (for EMT, similar for other types) states that there shall not be more than the equivalent of four quarter bends (360 degrees total) between pull points. Since four 90-degree bends already total 360 degrees, no additional bends are permitted.
Why the other options are wrong
- B. Adding even one more 90-degree bend would exceed the 360-degree limit.
- C. This would significantly exceed the maximum allowed bends.
- D. This would double the maximum allowed bends.
NEC Conduit Bends Limit
The National Electrical Code (NEC) limits the total number of bends in a conduit run between pull points (e.g., boxes, conduit bodies) to not more than the equivalent of four quarter bends (360 degrees total).
- Maximum of 360 degrees of bends between pull points.
- A 90-degree bend is a quarter bend.
- Applies to all types of conduit (EMT, IMC, RMC, PVC, etc.).
- Prevents excessive strain on conductors during pulling and simplifies installation/removal.
Memory trick: Four quarters make a whole circle, that's your bend limit, no more hurdle.