Fixture whip minimum length

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woodduder

Senior Member
Location
West Central FL.
I am installing some LED retrofit trims into existing CFL housings. We have discovered that some of the fixtures are wired in a daisy chain.

The CFL socket and ballast get 100% removed.

The new LED trim has a very small junction box and it requires the 120 volt be directly connected to the LED trim. The LED trim j-box is too small to install the two MC12-2 cables into. We want to leave the daisy chain connected to the CFL housings j-box and then install a fixture whip from that box to the LED trim.

I decided to check my code book concerning wire size that we could use and found that we can use #18 as long as it was a "fixture wire" type conductor which is no problem.

While reading in the code 410.117 (C) it says tap conductors are OK as long as the box is at least 1' away from the luminaire--this is a problem since the box is 3" away, but why must it be at least 1' away? Does anyone know why this is? The same code section also says the fixture whip must be at least 18" long. This is not a problem, but why would it have to be at least 18" long?
 
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