What's Wrong Here?

What’s Wrong Here? Hint: Just a Little Short

Think you know how this installation violates the NEC?

Hint: Just a little short

See the answer below.

 

 

 

 

 

 

 

The adage “Measure twice. Cut once.” was apparently not followed by this installer. The PVC conduit on the right end of this box came up a little short. Perhaps the earth settled, or perhaps there was some thermal expansion and contraction that caused this conduit to pop out of the connector. Whatever the reason, it creates a violation of Sec. 300.12, which requires raceways to be continuous between cabinets, boxes or other enclosures. This one doesn’t quite make it.

Section 352.30 similarly requires PVC conduit to be installed as a complete system. If thermal expansion and contraction is a concern, then expansion fittings should be installed in accordance with Sec. 352.44. Where earth movement could cause raceway damage, the PVC conduit should be arranged to comply with Sec. 300.5(J). Expansion fittings, expansion-deflection, and deflection fittings installed in accordance with Sec. 300.7(B) could also provide the necessary movements needed to keep this installation safe and Code compliant.

I’m not so sure this box is supported properly either. Section 352.12(B) does not allow PVC to support luminaires or equipment other than conduit bodies in accordance with Sec. 352.10(H). This enclosure is a swimming pool junction box. It is not a conduit body.

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