(2) If the same anchor rod is used for an uninsulated power guy that is electrically connected
to the multigrounded neutral power conductor, the exposed guy is grounded.
(3) When an electrical connection to the desired ground is not provided by the construction at
the guy location, a bare copper ground wire (number 6 AWG) must be connected between the exposed
guy and the ground. This ground wire may run from the exposed guy directly to the desired ground, or
it may be connected to a vertical ground wire run or other attachment that is electrically connected to the
desired ground.
(4) Use a strand clamp to attach the ground wire to the guy strand or cable suspension strand.
Before inserting the end of the ground wire in the strand ground clamp, bend the end of the wire to
double the bearing area in contact with the stand. Clamp the ground wire to the eye or neck of the
exposed guy. When a ground wire is to be clamped to the cable suspension strand, position the clamp
close to the cable suspension clamp.
(5) Staple the ground wire to the pole as required. Staples for vertical runs of the ground
wire should be spaced about 18 inches (46 cm) apart. When a ground rod is used, the ground wire that
is run from the pole to the ground rod must be placed underground. Splice the ground wire with the
wire on the ground rod with a compression sleeve joint or a soldered connection.
4.
Isolating guys. An exposed guy can be isolated by installing strain insulators on the guy to
prevent any electrical connection between the exposed section of the guy and the earth, or with the pole
and pole attachments. The procedure for installing strain insulators is discussed in paragraph 17 of Part
B.
a. Selection of strain insulators. The size and number of strain insulators to be used in isolating
exposed guys depends on the size of the guy strand and the voltage to which the guy is exposed.
(1) The mechanical and dielectrical strengths of the different strain insulators are listed in
Table 2-4. The mechanical strength is listed in terms of the maximum size guy strand that may be
insulated by the strain insulator. The dielectric strength is listed in terms of the maximum voltage to
which the guy may be exposed.
(2) The mechanical strength of a strain insulator cannot be increased. However, the
dielectric strength (insulation resistance) can be increased by installing two or more strain insulators in
series. For example, if a 10M guy strand is exposed to a voltage of 17,000 volts, the guy strand can be
replaced by a single 5 1/2-by-3 3/8-inch (13.97-by-8.57 cm) strain insulator or two 3 1/2-by-2 1/2-inch
(8.89-by 6.35 cm) strain insulators.
SS0439
2-34
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