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Entry  Tue Sep 1 11:23:36 2009, steve, Update, General, electrical ground ground.JPG
    Reply  Thu Sep 3 11:20:26 2009, steve, Update, General, electrical ground in place Gs-n.JPGnewground.JPG
Message ID: 1965     Entry time: Thu Sep 3 11:20:26 2009     In reply to: 1962
Author: steve 
Type: Update 
Category: General 
Subject: electrical ground in place 

Quote:

I was told yesterday, that on Friday the construction people accidentally ripped out one of the 40m soil ground.....AND HOW MANY MORE ARE THERE? nobody knows.

It was ~8 ft long and 0.5" diameter buried in the ground. There is no drawing found to identify this exact building ground. They promised to replace this on Wednesday with a 10 ft long and 0.75" diameter.

The  the wall will be resealed where the conduit enters  the  north west corner of the IFO room 104

 

There should be no concern about safety because the 40m building main ground is connected to the CES Mezzanine step-down transformer.

 Atm1 is showing ground bus under N-breaker panel in 40m IFO room north-west corner.

The second ground bus is visible farther down south under M-breaker panel.

Atm2 is the new ground that will be connected to ground bus-N

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