Bill Hider, N3RR

Bill Hider, N3RR

Grounding

Grounding =Controlling Lightning!

Personnel

Equipment

House/Facility

For Protection!

Personnel in the shack

The Ham Shack/house

Electronic equipment in the shack (TX, RX, AMPS, PCs, and the like)

Electronic and Electrical equipment elsewhere in the house

Specifically, Protect What @ N3RR?

Rotors and their controllers

Antennas

Tower-mounted relay switchers

Tower

Specifications/StandardsANSI/TIA/EIA-222-E

Available From: http://global.ihs.com/

Technical Information/Documentation

www.polyphaser.comhttp://www.lightningEliminators.com/

Many others. Search for “Lightning”

Outdoors:The Ground Grid

Controlling Lightning (Tower)

Controlling Lightning (Tower & Shack)

134 Ft Tower

52 FtTower

Tel&AC

SPG Box

HouseHamShack

=

==

=

=

8 Ft ground Rod w/clamp

Elevated guy anchor

1.5 Inch copper strap

# 4 wire

TELCO and AC power entry

= Common Tie-pointKEY

125 feet

125 feet

125

feet

8 Ft ground Rod w/Cadweld=

Not to Scale

N3RR – Grounding @ TowerLightning protectors:http://www.polyphaser.com/

Reference site:www.erols.com/n3rr

Steel Hoffman Boxeshttp://www.hoffmanonline.com/:Andrew Ground Kits

http://www.andrew.com:

PolyPhaser Lightning Protectors:

N3RR – Grounding @ TowerTower leg w/ground wires shown

N3RR – Grounding @ Tower

Not shown (on the tower):MOVs at each Ring Rotor – from each control wire to groundMOVs at the 80 Meter antenna relay box– from each control wire to ground

Andrew Ground Kit from each coax to ground as close to each antenna as possible

Guy anchor ground wires

N3RR – Grounding @ Guy Anchors

N3RR – Grounding – SPG @ House

134 Ft Tower

52 FtTower

Tel&AC

SPG Box

HouseHamShack

=

==

=

=

8 Ft ground Rod w/clamp

Elevated guy anchor

1.5 Inch copper strap

# 4 wire

TELCO and AC power entry

= Common Tie-pointKEY

125 feet

125 feet

125

feet

8 Ft ground Rod w/Cadweld=

Not to Scale

Review

N3RR – Grounding – SPG @ HouseOther Connections

Beverage coax entry & left side copper ground strap: Copper strap grounding to 8

ft copper ground rod:

N3RR – Grounding – SPG @ HouseOther Connections

Other end of copper ground strap (after 3 ground rods):

Indoors:The SPG Grid

House

SPG Box

(External)

TELCO& Electric

Ham Shack

SPG Wall PanelAll equipment grounds “home-run” to this SPG panel.All coax passes through this panel with “double-barrel” feed-through connectors.

N3RR – Grounding –InsideElectrical box to ground strap connection:

N3RR – Grounding –Inside

SPG panel inside:

N3RR – Grounding – Results

Since November 1994, one IC-781, IC-4KL, 5 Ring Rotors,One Hy-Gain rotor, 4 Packet Cluster Radios, 2 PCs,

with all antennas hooked up.

Only one failure due to elecrical shock: I left the ground wire off of a Ring Rotor controller durning a period of 1 week for maintenanceand a nearby lightning strike burned out an internal Zener diode.

NO OTHER FAILURES IN OVER 10 Years CONTINUOUSLY CONNECTED!

N3RR – Grounding – THE END!