Chapter 3 Wiring Methods and Materials

314.24 ARTICLE 314 - OUTLET. DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FlTTINGS; AND HANDHOLES
or intermediate metal conduit stems. For stems longer than
450 mm (18 in.), the stems shall be connected to the wiring
system with flexible fittings suitable for the location. At the
luminaire end, the conduit(s) shall be threaded wrenchtight
into the box or wiring enclosure, or into hubs identified for
the purpose.
Where supported by only a single conduit, the threaded
joints shall be prevented from loosening by the use of setscrews
or other effective means, or the luminaire, at any
point, shall be 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. A luminaire supported by a
single conduit shall not exceed 300 mm (12 in.) in any
horizontal direction from the point of conduit entry.
314.:4 ~. ~,."Bo..·_t.:Jh:"'~_
and:Uftliatl.~.OUdel.;.~::~.
bavesuffici~;.~~·.toauow~:~~
thetttw· ~Ihount«t ~rly lWd witbs~~~
to prevent damage to CbDducf()tSwitI1m.tb~:~.
(A) OD.ttet Bo_WItb_.~ ~~j.~
ticm Equi~. N():~:sbatlhave"
less than. 12~ 7.tnnl {Ma i•.).
~.~:~j:I'
314.25 Covers and Canopies. In completed installations,
each box shall have a cover, faceplate, lampholder, or luminaire
canopy, except where the installation complies with
41O.•(B).
(A) Nonmetallic or Metal Covers and Plates. Nonmetallic
or metal covers and plates shall be permitted. Where
metal covers or plates are used, they shall comply with the
grounding requirements of 250.110.
FPN: For additional grounding requirements, see 41O.!I~(A)
for metal luminaire canopies, and 404.12 and 406.5(B) for
metal faceplates.
(B) Exposed Combustible Wall or Ceiling Finish. Where
a luminaire canopy or pan is used, any combustible wall or
ceiling finish exposed between the edge of the canopy or
pan and the outlet box shall be covered with noncombustible
material.
(C) Flexible Cord Pendants. Covers of outlet boxes and
conduit bodies having holes through which flexible cord
pendants pass shall be provided with bushings designed for
the purpose or shall have smooth, well-rounded surfaces on
which the cords may bear. So-called hard rubber or composition
bushings shall not be used.
314.27 Outlet Boxes.
(2) ~'JArlerT_4 AWG. I!o;,es._"
util'iAtjou
. 1 . eqt.ijppwn .": "'~ 'Y "F~~~".., ", ., .•
t .........utd o~~·llIIIWi:-.:'i4
AWG shaD'be identified1'O.t their ~ilC"~ef:ipa
(3) CoDdUc:tors 8, 6,~r 4 AWG. Bo~~~~1~;';'
zation equipment supplied by.S, 6. or 4~WP,~:.1II
have an internal cJemb that,.is not Jess tJWt '~.4 .•lift.'i)t'}.
(4) C~ 12 -orlJAW". ~estba\*.~:~
zauon ~~,bF' ·,2:·w, ',~:*W:(\f~
slulll :lU!ve.an mf.etW lIePtbfhal isnot"'t'- ·3~.i':_
(A) Boxes at Luminaire Outlets. Boxes used at luminaire
or lampholder outlets jid:~~itig shall be designed for the
u ose ,,~"""""~~~"'s~:"·;itft_~-~...fi""..
p rp ". ","K ....'i!'t~-~., . ...".~..,.(:Ij"'~-....:'"...,....:
"'lIIfIIJiJ.;~~~.;~)~~"J~·~;.:.i8aiR·()t
__~.:.lIiJ;'0il'611,_l:I;,•.~....:-·thI.b"W';;
v,",,," ",~ .;, " ',db_~",;:'""""h'1!j,cJJ~~~