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Even if a water line or building steel is common to the electrical ground (which it should be) that doesn't mean that there isn't a differential voltage between the two. Even if there isn't any voltage when you install the system there isn't any guarantee there will always be none. I have had a differential voltage crop up after more than two years that destroyed a system.
The only way to be sure you will have no problems is to ground your system to the same point that the line cord is connected to.
-Hal
CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.
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I have talked to some alarm guys and they do not ground their alarm panels. Any reason that you know of why they don't?
Jeff Moss
Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
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Any reason that you know of why they don't?
Because they work fine without a ground? I haven't connected the supplemental ground on a Partner system in years since I had two destroyed.
-Hal
CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.
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A "simple" outlet tester is not sufficient. As others have stated, you must use the electrical/building bond and ensure that you have a very low resistance between the system ground and the building ground.
Arthur P. Bloom
"30 years of faithful service...15 years on hold"
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I am not certain if it is NEC or not, but in my area the telephone ground is not allowed to exceed 5 ohms.
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No code requirement that I'm aware of but I'm not familiar with Canadian codes. Might also be a TELCO practice. What do they consider a "telephone ground"? That normally means the primary protectors and I can see the reasoning there. I don't think anybody cares about the KSU ground.
-Hal
CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.
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1864, that's a rebranded Panamax surge protector. We always use them but if you are using the ground bus on it to connect the ground from the system that's no better than the line cord itself. That's because the line cord on the Panamax strip can be pulled just as easily. The system suplemental ground must be permanently connected.
-Hal
CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.
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-TJ-
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Hal
"That's because the line cord on the panamax strip can be pulled just as easily"
"can be pulled " help me out here,thats the same as can be used ?
I'm missing your statement some how.
Explain, thanks.
-TJ-
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