necessary to use metal conduit, it shall be encased
in concrete, tape wrapped, PVC coated or otherwise
fully protected against chemical activity.
**************************************************************************
Provide cone pointed driven ground rods driven full depth plus 150 mm 6
inches, installed to provide an earth ground of the appropriate value for
the particular equipment being grounded.
3.1.16.2
Grounding Connections
Make grounding connections which are buried or otherwise normally
inaccessible, [excepting specifically those connections for which access
for periodic testing is required,] by exothermic weld or compression
connector.
a.
Make exothermic welds strictly in accordance with the weld
manufacturer's written recommendations. Welds which are "puffed
up" or which show convex surfaces indicating improper cleaning are
not acceptable. Mechanical connectors are not required at
exothermic welds.
b.
Make compression connections using a hydraulic compression tool to
provide the correct circumferential pressure. Tools and dies
shall be as recommended by the manufacturer. An embossing die
code or other standard method shall provide visible indication
that a connector has been adequately compressed on the ground wire.
3.1.16.3
Grounding Conductors
Grounding conductors shall be stranded-bare copper conforming to ASTM B 8,
Class B, for sizes No. 6 AWG and larger, and shall be solid-bare copper
conforming to ASTM B 1 for sizes No. 8 and smaller. Cable sheaths, cable
shields, conduit, and equipment shall be grounded with No. 6 AWG [, except
34.5 kV cable sheaths and cable shields shall be grounded with No. 4/0 AWG].
3.1.16.4
Ground Cable Crossing Expansion Joints
Protect ground cables crossing expansion joints or similar separations in
structures and pavements by use of approved devices or methods of
installation which provide the necessary slack in the cable across the
joint to permit movement. Use stranded or other approved flexible copper
cable across such separations.
[3.1.16.5
Ground Rod Connections
**************************************************************************
NOTE: Do not use this paragraph except under
special conditions where insulation is required.
**************************************************************************
Connect ground rods only to insulated copper ground conductor and weld the
connection. Insulate entire area of the rod in the vicinity of the weld in
accordance with UL 467and the connecting wire and seal against moisture
penetration.
][3.1.16.6
Fence Grounding
[Fences shall be grounded as indicated.]
[Fences shall be grounded with a
SECTION 16302N
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