Advice for Wiring a Built-in Garage


Old 01-05-15, 06:38 AM
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It depends on exactly which national code cycle your city follows and if there have been local amendments. The ampacity of SER cable has changed in pretty much every recent version of the code (thus the variation in answers you've gotten in this thread). Article 338 describes uses of SER and it will also refer back to article 334 as SER is also a non-metallic cable; article 310 will cover various aspects of the ampacity.

Here are some general themes. The 90 degree column cannot be used for SER in this situation, your ampacity will either be the 75 or 60 column. If you can't readily tell which code revision you follow, pick 60 degree ampacity to play it safe. I don't think you will have any breaker tripping problem in any case.
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