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HunterofPhotons
sage
Reged: 04/26/08
Posts: 252
Loc: Rhode Island, USA
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Quote:
OK - so install a separate earth ground copper rod at the observatory but only attach all the grounds, boxes, etc. to it and leave the neutrals on a separate non-grounded bus bar in the observatory - right? The neutrals would be tied to the ground bus bar at the main breaker box but not at the observatory?
Mike
I wouldn't, Mike.
There is still the possibility of differing ground potentials and the havoc that they can cause.
You realize, of course, that having a ground rod at the observatory offers virtually no protection from a lightning strike. You could spend hundreds of thousands of dollars on a Faraday cage linked to huge, buried copper plates and still lose your equipment to a lightning strike.
I believe that you would be better off wiring your observatory according to code and following the easy, practical suggestions: unplugging equipment, using UPS, etc. Most important would be making sure that you're covered by insurance.
This is a case where Mother Nature can trump any of Man's efforts to thwart her.
dan
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Galaxyhunter
Pooh-Bah
Reged: 01/02/06
Posts: 1227
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Quote:
OK - so install a separate earth ground copper rod at the observatory but only attach all the grounds, boxes, etc.
Quote:
I wouldn't, Mike.
There is still the possibility of differing ground potentials and the havoc that they can cause. ---- I believe that you would be better off wiring your observatory according to code
The best bet is to check the code for your location. Here in the county I live in, the grounding rod is requiered for an outbuilding that has electrical service to it.
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Carl
My lousy skies at Hawkeye Observatory
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Luigi
Post Laureate
Reged: 07/03/07
Posts: 4887
Loc: Massachusetts
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Check out these articles. http://www.polyphaser.com/technical_notes.aspx
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Discovery 17.5" f/5. IM 7" f/15 MCT. Eon-120ED
Lunt 60mm Ha on Nexstar mount.
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9 Nag. 35&19,Pans. 24.5 4kSWA. 14&4.7 5kUWA Meades
6, 9, 12.5 UO-AO. 3mm Edge-on. 7mm BO-TMB
Zeiss, Leupold, Bushnell spotters
Zeiss, Leica, Fujinon, Nikon, Pentax, Bushnell binos
One each generic rescue Greyhound
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