Article 390 Underfloor Raceways

390.1

Scope

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.

390.3

Covering

390.4

Size of Conductors

Not larger than designed for.

390.5

Maximum Number of Conductors in Raceway

Not more than 40% fill.

390.6

Splices and Taps

390.7

Discontinued Outlets

390.8

Laid in Straight Lines

390.9

Marker at Ends

390.10

Dead Ends

390.13

Junction Boxes

390.14

Inserts

390.15

Connections to Cabinets and Walls

390.17

Ampacity of Conductors






Pocket Guide to the National Electrical Code 2005
Pocket Guide to the National Electrical Code(R), 2005 Edition (8th Edition)
ISBN: 0131480014
EAN: 2147483647
Year: 2004
Pages: 120
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