LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
Well . . .480sparky said:
Are ungrounded GFCI sockets safe for expensive equipment?
- Thread starter Chappie
- Start date
- Status
ultramegabob
Senior Member
- Location
- Indiana
haskindm said:
my guess would be that they are probly going to run a new circuit from the panel, and just add a new recept location in each room where ever its wanted. thats what I would do....
That would indeed be the best way to do this. From the way the OP has put it, I suspect that some "bootleg" ground was installed to the existing receptacle of his choice. I envision a separate ground rod being installed to "ground" these selected receptacles. I hope I am wrong.
jrclen
Senior Member
- Location
- Central Wisconsin
mdshunk said:
The inspector signed off on the job yesterday. I asked him about the stickers and explained what the lady told me to do with the stickers. He laughed and told me he has a wife too. No labels required. :grin:
gar
Senior Member
- Location
- Ann Arbor, Michigan
- Occupation
- EE
080405-1917 EST USA
I second ultramegabob's suggestion in post 40. I have had one of these for 40 years at my home, and I also have some secondary protection nearer some equipment. In that time I have had one failure in a TV set that was probably lightning related.
About 25 years ago I had a computer directly connected via RS232 with a plotter. There was 30 ft or so of RS232 cable between the equipment. A lightning storm wiped out RS232 components at both ends. That is one reason that today I make and sell RS232 isolators. These also are a great solution to ground path noise problems, and provide high baud rate capability at long cable lengths.
Some side information. I check the ground path current individually on four different devices:
Hewlett-Packard 5Si laser printer, 10 MA.
An older computer, 3 MA.
A UPS power supply with nothing plugged in, 2 MA.
An 8 ft Slimline with a noise filter, 3 MA.
Since the input filters on these machines probably include capacitors from the power leads to the chassis and therefore to the cord ground pin I can expect the the signals from each to be phase correlated with the AC line and in turn should directly add to each other. If all four were connected to the same circuit, then the sum would be about 18 MA.
.
I second ultramegabob's suggestion in post 40. I have had one of these for 40 years at my home, and I also have some secondary protection nearer some equipment. In that time I have had one failure in a TV set that was probably lightning related.
About 25 years ago I had a computer directly connected via RS232 with a plotter. There was 30 ft or so of RS232 cable between the equipment. A lightning storm wiped out RS232 components at both ends. That is one reason that today I make and sell RS232 isolators. These also are a great solution to ground path noise problems, and provide high baud rate capability at long cable lengths.
Some side information. I check the ground path current individually on four different devices:
Hewlett-Packard 5Si laser printer, 10 MA.
An older computer, 3 MA.
A UPS power supply with nothing plugged in, 2 MA.
An 8 ft Slimline with a noise filter, 3 MA.
Since the input filters on these machines probably include capacitors from the power leads to the chassis and therefore to the cord ground pin I can expect the the signals from each to be phase correlated with the AC line and in turn should directly add to each other. If all four were connected to the same circuit, then the sum would be about 18 MA.
.
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jrclen
Senior Member
- Location
- Central Wisconsin
I just received the monthly newsletter from our electric co-op. They offer a surge suppressor which mounts in the meter can. $6.50 per month on the electric bill.
- Status