Article 390 Underfloor Raceways
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390.1 |
Scope |
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390.2 |
Use |
(A) Permitted. This type of raceway can be used beneath the surface of concrete flooring or in an office flush with the concrete floor with other floor covering.
(B) Not Permitted. This type of raceway can not be used if exposed to corrosive vapors, in a hazardous location [for an exception refer to 501.4(B)(3) and 504.20], in concrete or in corrosive areas unless properly protected and approved.
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390.3 |
Covering |
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390.4 |
Size of Conductors |
Not larger than designed for.
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390.5 |
Maximum Number of Conductors in Raceway |
Not more than 40% fill.
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390.6 |
Splices and Taps |
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390.7 |
Discontinued Outlets |
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390.8 |
Laid in Straight Lines |
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390.9 |
Marker at Ends |
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390.10 |
Dead Ends |
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390.13 |
Junction Boxes |
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390.14 |
Inserts |
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390.15 |
Connections to Cabinets and Walls |
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390.17 |
Ampacity of Conductors |