warning ribbon

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domnic

Senior Member
Occupation
Electrical Contractor
Is warning ribbon required for under ground service conductors under 600 volts ?
 
infinity

infinity

Moderator
Staff member
Location
New Jersey
Occupation
Journeyman Electrician
Notice the part in bold:

300.5(D) Protection from Damage. Direct-buried conductors and cables shall be protected from damage in accordancewith 300.5(D)(1) through (D)(4).
(1) Emerging from Grade. Direct-buried conductors and
cables emerging from grade and specified in columns 1 and
4 of Table 300.5 shall be protected by enclosures or race-
ways extending from the minimum cover distance below
grade required by 300.5(A) to a point at least 2.5 m (8 ft)
above finished grade. In no case shall the protection be
required to exceed 450 mm (18 in.) below finished grade.
(2) Conductors Entering Buildings. Conductors entering
a building shall be protected to the point of entrance.
(3) Service Conductors. Underground service conductors
that are not encased in concrete and that are buried 450 mm
(18 in.) or more below grade shall have their location iden-
tified by a warning ribbon that is placed in the trench at
least 300 mm (12 in.) above the underground installation.
(4) Enclosure or Raceway Damage. Where the enclosure
or raceway is subject to physical damage, the conductors shall
be installed in rigid metal conduit, intermediate metal conduit,
RTRC-XW, Schedule 80 PVC conduit, or equivalent.
Click to expand...
 
D

domnic

Senior Member
Occupation
Electrical Contractor
warhing ribbon

warhing ribbon

So all service conductors under ground not incased in concrete must have warning ribbon ?
 
tom baker

tom baker

First Chief Moderator & NEC Expert
Staff member
Location
Bremerton, Washington
Occupation
Master Electrician
Just direct buried. The warning ribbon is a feel good device, typically the ribbon and the wire get dug up at the same time
 
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