John Dirks Jr Posted November 9, 2015 Report Share Posted November 9, 2015 This 1" armored conduit was stuffed with at least 22 THHN conductors during a past panel upgrade. This will be a first for me writing up excessive conduit fill. You'd be hard pressed to fit another conductor in there. The conduit was at least 15' long passing through garage attic before disappearing into house attic. I'm pretty sure form past discussions on here that this is wrong so I'm writing it up. Do you concur? Click to Enlarge 45.73 KB Quote Link to comment Share on other sites More sharing options...
Marc Posted November 9, 2015 Report Share Posted November 9, 2015 It shouldn't be over 40% fill as per Table 1, Chapter 9 of the NEC. Marc Quote Link to comment Share on other sites More sharing options...
John Dirks Jr Posted November 9, 2015 Author Report Share Posted November 9, 2015 It shouldn't be over 40% fill as per Table 1, Chapter 9 of the NEC. Marc Thanks Marc. It's packed way beyond 40%, that's for sure. Quote Link to comment Share on other sites More sharing options...
brric Posted November 10, 2015 Report Share Posted November 10, 2015 1" FMC is allowed up to 24 #12 or 33 #14. Derating is another subject. Quote Link to comment Share on other sites More sharing options...
Jim Port Posted November 10, 2015 Report Share Posted November 10, 2015 It shouldn't be over 40% fill as per Table 1, Chapter 9 of the NEC. Marc Thanks Marc. It's packed way beyond 40%, that's for sure. You cannot base the percentage of fill on looks. Using the figures posted by bricc you can still have another 2 conductors before being overfilled. Quote Link to comment Share on other sites More sharing options...
Marc Posted November 10, 2015 Report Share Posted November 10, 2015 Where did this '24 #12 or 33 #14' come from? Cite? Marc Quote Link to comment Share on other sites More sharing options...
Jim Port Posted November 10, 2015 Report Share Posted November 10, 2015 Table 9 of the NEC has the allowable fill charts. Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted November 10, 2015 Report Share Posted November 10, 2015 You cannot base the percentage of fill on looks. Using the figures posted by bricc you can still have another 2 conductors before being overfilled. Agreed. But, in general, derating limits the fill before you reach 40%. Quote Link to comment Share on other sites More sharing options...
Jim Baird Posted November 10, 2015 Report Share Posted November 10, 2015 I once went round with an electrician who bundled his romex out of the box through a big piece of sked 40 in pursuit of neatness. I finally gave up and let him have his neat since in a typical dwelling most of the load is inactive most of the time anyway. Quote Link to comment Share on other sites More sharing options...
Jim Port Posted November 10, 2015 Report Share Posted November 10, 2015 I once went round with an electrician who bundled his romex out of the box through a big piece of sked 40 in pursuit of neatness. I finally gave up and let him have his neat since in a typical dwelling most of the load is inactive most of the time anyway. That is allowed for surface mount panels. The sleeve needs to be 18" or longer as well as other conditions. Quote Link to comment Share on other sites More sharing options...
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