[time-nuts] lightening protection of a GPSDO system / optical isolated distribution amp

Jim Lux jimlux at earthlink.net
Wed Nov 26 19:10:35 EST 2014

On 11/26/14, 2:54 PM, Hal Murray wrote:
> albertson.chris at gmail.com said:
>> The ground rod needs to be bonded to the rest of the building ground system.
> How do I do that effectively if the power goes in the front of the building
> and the antenna is on the back?

AWG 6 wire with no breaks or splices between the two.

The goal of bonding all the grounding systems together is not for 
transient suppression.  It's to make sure that there's no DC or line 
frequency potential difference between "electrical safety ground" at 
various places in the building.

The background on the whole grounding/bonding requirement is more about 
safety when a power carrying conductor, either inside equipment or 
overhead, touches something that people might touch. And, to a lesser 
extent to ensure that if there's an internal short, that the breaker or 
fuse will trip.

NEC requirements for grounding and bonding aren't there for transient 

A copy of IEEE 1100 (the Emerald Book) is good reading for the whole 
bonding and equipotential planes, etc.  (unfortunately not free from IEEE).

A good book on transient protection is Ronald Standler's book 
"protection of electronic circuits from overvoltages"
Something like $20 from Dover...

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