help w/ halo ground ring

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brantmacga

brantmacga

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Location
Georgia
Occupation
Former Child
bidding on a cable headend site;


rfq specifies a halo ground ring around the building; not very familiar w/ these as lightning protection has been sub'd out in the past.

the building is 11.5'x20'; are the requirements to place one ground rod @ each corner? seems like the last time we ran conduit for our lightning sub-contractor we spaced them about 25' but that building was 600k sq ft.

where do i find the requirements? customer has not been a good source for information.

also they specify "inspection ports" to verify the cadwelding; is this just a handhole over each groundrod?

thanks
 
brantmacga said:
bidding on a cable headend site;


rfq specifies a halo ground ring around the building; not very familiar w/ these as lightning protection has been sub'd out in the past.

the building is 11.5'x20'; are the requirements to place one ground rod @ each corner? seems like the last time we ran conduit for our lightning sub-contractor we spaced them about 25' but that building was 600k sq ft.

where do i find the requirements? customer has not been a good source for information.

also they specify "inspection ports" to verify the cadwelding; is this just a handhole over each groundrod?

thanks
Click to expand...

PM me with your E-mail. I will send you a copy of Motorola's R-56 standards for grounding. It has good info for what you are doing.
As far as the inspection port we just use 4" PVC pipe. Put the pipe in about 6-8" lower than the top of the rod and then back fill and gravel. Then just put a cap on the pipe just above grade.
 
I should be charging $$$$$$ :grin::grin::grin:

I have sent it. Let me know if there is any problems
 
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ceb58 said:
I should be charging $$$$$$ :grin::grin::grin:

I have sent it. Let me know if there is any problems
Click to expand...

Oh my goodness Ceb!
What have you done!!!
R56! Their heads will explode!!! LOL
 
brantmacga said:
the info was just what i was looking for.

thanks curtis.
Click to expand...

You be welcome. One thing to keep in mind about it. It is there standard from 05. and they use the 05 NEC code for a reference. Most of the codes have not changed but it is a good idea to verify against the 08 or 11 (if you are under it already)
 
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