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than the largest trade size of the conduit or electrical

metallic tubing.

(F) Raceway Supported Enclosures, with Devices,

Luminaires (Fixtures), or Lampholders.

An enclo-

sure that contains a device(s) or supports a luminaire(s)

[fixture(s)], lampholder, or other equipment and is

supported by entering raceways shall not exceed 1650

(100 in.

) in size. It shall have threaded entries or

have hubs identified for the purpose. It shall be support-

ed by two or more conduits threaded wrench-tight into

the enclosure or hubs. Each conduit shall be secured

within 450 mm (18 in.) of the enclosure.

Exception No. 1: Rigid metal or intermediate metal conduit

shall be permitted to support a conduit body of any size,

including a conduit body constructed with only one conduit

entry, provided the trade size of the conduit body is not

larger than the largest trade size of the conduit.

Exception No. 2: An unbroken length(s) of rigid or

intermediate metal conduit shall be permitted to support

a box used for luminaire (fixture) or lampholder support,

or to support a wiring enclosure that is an integral part

of a luminaire (fixture) and used in lieu of a box in

accordance with 300.15(B), where all of the following

conditions are met.

(a) The conduit is securely fastened at a point so that

the length of conduit beyond the last point of

conduit support does not exceed 900 mm (3 ft).

(b) The unbroken conduit length before the last point

of conduit support is 300 mm (12 in.) or greater, and

that portion of the conduit is securely fastened at

some point not less than 300 mm (12 in.) from its

last point of support.

naire (fixture), measured to its lowest point, is at

least 2.5 m (8 ft.) above grade or standing area and

at least 900 mm (3 ft.) measured horizontally to the

2.5 m (8 ft) elevation from windows, doors, porches,

fire escapes, or similar locations.

(d) A luminaire (fixture) supported by a single conduit

does not exceed 300 mm (12 in.) in any direction

from the point of conduit entry.

(e) The weight supported by any single conduit does

not exceed 9 kg (20 lbs.).