ground1.com - Low Noise Guide

GUIDELINES FOR A LOW NOISE ELECTRICAL DISTRIBUTION SYSTEM

Electrolytic ground rod with bentonite clay back fill. This rod should give a 5 Ohms or less connection to ground.

Connection from ground rod to breaker panel should be with # 4/0 wire.

Cad Weld bonding connections for connection to ground rod and technical ground distribution point.

True Isolation transformer that is K rated with:

Oversized Neutral buss

Flat copper windings

Three layers of electrostatic shielding

Primary surge suppression

Secondary RF noise filtering

I.E.M. or Equivalent Distribution panel with:

Copper buss bars

Oversized neutral

Isolated Neutral buss

Isolated ground buss

Main breaker with 80% under voltage magnetic dropout

High quality multi stage filtering along with spike and surge suppression for the service entrance and all branch panels.

Individual circuit wiring

All wires should be stranded # 10 gauge wire for 20 amp circuits; # 12 gauge wire for 15 amp circuits.

Hot and neutral wires should be twisted. (one twist per inch)

All neutral and ground wires should be home runs to breaker panel.

An additional utility ground wire should connect and looped to each J box and back to breaker panel.
This can be a # 14 solid wire.

All wiring should be pulled through flex or rigid conduit.

All receptacles need to be isolated ground type. Hospital grade is preferable.

Length of wiring from breakers to receptacles should be as shot as possible. Less than 50' is Ideal.

Isolation transformer and ground rod should be located as close to the distribution panel as possible.

Any computers or hard drive based equipment should be on an ON LINE UPS system that is K rated with an input harmonic filtering system.


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10/27/08