Bond is obtained through a painted surface. Disassemble, remove paint and reassemble. Protect
with waterproof paint if exposed to moisture.
A black wire, not reidentified, is found to be used as an equipment grounding conductor. If it is
larger than a No. 6 AWG, it may be reidentified with green paint or tape or by other means at each end and
wherever accessible. If smaller than No. 6, it should be replaced to comply with the NEC. However, an
acceptable substitute would be to reidentify it with green paint or tape if replacement is impractical or
Grounding conductor is routed through conduit and the conduit is not grounded. Ground the conduit
at both ends by means of a grounding bushing or clamp, a jumper wire, and a split-bolt connector. The jumper
wire is to be the same size as the grounding conductor.
Service neutral is not grounded but equipment enclosure is grounded by means of a grounding
conductor. Ground the neutral by connecting it to the grounding conductor/bus in the first service disconnect.
Conductor insulation is damaged and conductor is exposed.
Conductor should be replaced.
Alternate correction is to cover the damaged area with insulating tape until the insulation of the repaired area
is equal to the insulation of the conductor.
Power panel is grounded by a soldered connection. Provide supplemental grounding by means of a
bolted grounding connector.
Ground bus is not grounded and equipment grounding conductors terminate at equipment frame, not
at receptacles. Connect ground bus to panel frame by means of UL-approved connectors.
m. Raceway contains neutral and grounding conductors of different systems (e.g., commercial and
regulated power) and conductors are not distinguishable. Distinguish conductors from each other by means of
paint, tape or tags. Alternately, tie the phase, neutral and equipment grounding conductors of each system
1.5 SIGNAL REFERENCE SUBSYSTEM FOR NEW FACILITIES.
1.5.1 Higher Frequency Network. The higher frequency network is a conductive sheet, grid, or cable network
mesh providing multiple low resistance paths between any two points within the structure and between any
point in the structure and the earth electrode subsystem. It consists of three primary components:
(1) equipotential plane, (2) equipment ground conductors, and (3) structural steel elements and electrical
supporting structures, (see Figures 1-49, 1-50, and 1-51) connected to the earth electrode subsystem. The
grounding (green) wire shall not be considered a substitute for this subsystem. The optimum interconnecting
cable and mesh spacing of the equipotential plane should be 1/8 of a wavelength with regard to the highest
frequency of concern. In practice this may not be feasible and the interconnecting cable and mesh spacing
should therefore be as short and small as practical.