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Electrically separate critical loads from other building loads to prevent system
interactions, including sags and transients. |
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Grounding practices that insure high integrity low impedance path to ground
a. Single point ground referencing for electrical system as
well as other systems (telephone, cable, DSL, etc.)
b. Auxiliary structure grounding methods including ground rings when
applicable.
c. Separate ground wire not conduit ground. |
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Separate or oversized neutrals for circuits that feed non-linear loads (computers,
UPS, solid state ballasts) |
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Measure ground impedance and leakage current at critical ground reference points. |
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Install High Resistance Grounding or artificial neutral transformer with resistor on
ungrounded systems to eliminate transient over voltages present on ungrounded
(floating systems) by establishing ground reference. |
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Install MGB (Master Ground Bar) for telephone security camera, cable TV, antenna
and other low voltage systems.
a. Cable TV
b. Any copper signal or communications cabling that enters or exits a
building |