UPS bonding

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cadpoint

cadpoint

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Location
Durham, NC
In the same large electrical room, I was bonding a UPS to a cable tray.

Old salt installer mentioned the following to me. ? I don?t see why we are bonding the UPS to the grounding system. One doesn?t want this (piece of equipment) connected to the same as the house bond if there is a lighting strike!
There is no way the UPS can take the hit on the IC?s or anything else ? He went on to say, ?In a power plant the operator only wants a wants a ground rod on the first generator(the same thing should be for UPS), and nothing tied to the building steel?

My only answer was that UPS?s were not my forte? :D

I know I don't know IEEC requirements.
 
cadpoint said:
In the same large electrical room, I was bonding a UPS to a cable tray.

Old salt installer mentioned the following to me. ? I don?t see why we are bonding the UPS to the grounding system. One doesn?t want this (piece of equipment) connected to the same as the house bond if there is a lighting strike!
There is no way the UPS can take the hit on the IC?s or anything else ? He went on to say, ?In a power plant the operator only wants a wants a ground rod on the first generator(the same thing should be for UPS), and nothing tied to the building steel?

My only answer was that UPS?s were not my forte? :D

I know I don't know IEEC requirements.
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If you didn't bond it and it did take a hit what is going to keep it at the same potential? All of our UPS's are bonded to the grounding ring per Motorola's R-56 and have never lost a UPS to a strike on the tower.
 
I realized that his statement was off the mark! Ireally like working with the older folk, I always have.

Sometimes you can gain some insight; sometimes you need you boots? :)
 
By any chance was this guy an "old time" phone company guy? They seem to think an isolated ground rod can cure anything.
 
It is durn near impossible not to bond it. Somewhere somehow it will be bonded, you might as well do it right.

Years ago, I worked at a site the strived for true isolation, they had a million issues, anchors in the floor, ducts, water pipes, conduits, comm. cables, you name it, they worked for weeks and still had a connection, they could not locate. The site finally got up and running with unknown grounds but NO operational issues.
 
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