According to National Electrical Code, the conduit percentage fill table does not apply to sections of conduit used to provide protection from physical damage (sleeve).

National Electrical Code 2014

Chapter 9 Tables

Notes to Tables

(2) Table 1 applies only to complete conduit or tubing systems and is not intended to apply to sections of conduit or tubing used to protect exposed wiring from physical damage.

However, I wasn't able to find anywhere that defines when sections of conduit become a complete conduit system. When the code says "sections" does it actually mean a section of conduit, so it would be a 10' length for example? Is it a "section" until it's attached to fittings or boxes?

Once I determine if it's a section or not, how do I determine how many conductors can fit? Since the code says Table 1 does not apply, does that mean I should use the 100% fill values to determine fill?

  • Found this somewhere: "A sleeve is [...] not connected to enclosures." – Mazura Mar 27 '15 at 0:41
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    From my experience, the local codes are usually loose enough where the code official usually gets to say what they want in regards to determinations like these and if a sleeve is allowed, then common sense should take over and an appropriate fill table be applied based on the application. – Damon Dec 2 '15 at 9:25

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