[RFI] w7ekb & ground rods

[donovanf at starpower.net]

NEC quotes relevant to this discussion: 

Not less than two driven ground rods placed at a minimum of 6 feet 
apart when a non-metallic water piping system exists or is to be installed. 

A separate grounding conductor to each ground rod shall be utilized 

The grounding electrode conductor shall be solid or stranded , sized in 
accordance with the requirements of the NEC but shall in no case be less 
than No. 6 AWG copper or No. 4 AWG aluminum or copper-clad aluminum. 

All ground rods will be required to be minimum 1/2" x 8' copper weld or 
5/8” x 8’ copper plated only. 

No galvanized rods or piping will be accepted as a grounding electrode. 

73 
Frank 
W3LPL 



----- Original Message -----

From: "Donald W. Kane via RFI" <rfi at contesting.com> 
To: eedwards at oppd.com, rfi at contesting.com 
Sent: Friday, January 16, 2015 1:23:03 AM 
Subject: Re: [RFI] w7ekb & ground rods 

NEC requires minimum 6 ft. between ground electrodes..for better 
performance minimum 2X electrode length (e.g. 16 ft for 8 ft rods). 

73 
Don 
WB2BEZ 


In a message dated 1/15/2015 4:46:00 P.M. Eastern Standard Time, 
eedwards at oppd.com writes: 

Excellent point Jim. All services' grounds (AC, telephone, television, 
internet and ham shack cable entry point & ham tower) must be bonded to a 
single-point ground system. There's no limit on number of ground rods as long 
as they're bonded (i.e. tied to the same grounding system). 8 foot ground 
rods need to be within 16 ft of each other, but can be closer if needed to 
shorten cable run to each service ground connection. 

Couple more good references for grounding and bonding standards from 
Motorola & Harris: 
http://www.radioandtrunking.com/downloads/motorola/R56_2005_manual.pdf 
http://www.repeater-builder.com/ge/lbi-library/t4618r3a.pdf 

73, de ed -K0iL 

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