search for: grounded

...just setup to ask my real question): grounding conductor (earthing conductor in UK, "green wire" in US) bonded from the main ground system (more or less at the entrance panel) to all exposed metal including case and ground bus of any subpanels a single bond from neutral ("grounded conductor", white in US) to ground at the service entrance (SE). (I think in the UK this bond is on the power company side and the SE has N and G separate.) When you have a wall outlet, it has neutral/hot/ground, and neutral and ground are connected way back at the SE. The UPS metal ca...

Hi, I know that the type of model described in the subject line violates the principle of marginality and it is rare in practice, but there may be some circumstances where it has sense. Let's take this imaginary example (not homework, just a silly made-up case for illustrating the rare situation): I'm measuring the energy absorption of sports footwear in jumping. I have three models (S1,

...fected by simply removing the tip ground of a bifalor (two > in > > hand) wound line relay. There was a line relay for every line in the > > central office. Doing this in effect preventing it from operating unless > > the ring conductor (the -48vdc power feed to the line) was grounded, > closing > > the loop would no longer do. Until either the line relay or the cutoff > > relay (busy at central office) was operated, the central office was > > "ignorant" of the change of status of the distant end. So to operate a > line > > relay if the...

I've recently begun integrating an Asterisk system into my house. I purchased the Dev Kit a year or two ago when Digium was selling it as a Z-plex 10 channel bank with the T100P. I've recently found that when I connect the serial monitoring port to my system it introduces a noticable hum on my incoming FXO lines. Anyone know (or have suggestions about) how to prevent this? -- Jamin

hi, I received this e-mail which contains a "ballad", at first I thought it was junk mail, but then I read through it, for the EE members of this list, it may be quite humorous. I don't know if the ballad is original, but at least it's the XMAS season, so it's something to lighten up your day, eh? -samudra """ How the Ground Loop Stole Christmas

Hello, I have one UPS Infosec XP Pro 2500 RM and it works with windows sw RUPS2000. Now I want to install this UPS as virtual server on vmware ESXi vMA - (SUSE SLES 11SP2 linux). On this linux I have NUT 2.6.0 and I stopped now with configuration of genericups driver. Working cable (direct cable pin1-pin1 ... pin9-pin9) connection on Windows: PIN | PC | UPS

We have been experiencing static noise on one of our phone lines connected to our Adtran Total Access 750 which is then connected to a T100P card. I was convinced that, after rain storms, the static would get worse, it was surely a problem of Verizon's. Verizon sent a field rep out today and he told our secretary (I was busy) that there was a hard ground on the Ring portion of the line.

Here's one for you phone people.... An elderly lady phoned her telephone company to report that her telephone failed to ring when her friends called - and that on the few occasions when it did ring, her pet dog always moaned right before the phone rang. The telephone repairman proceeded to the scene, curious to see this psychic dog or senile elderly lady. He climbed a nearby telephone pole,

Sorry if it is a silly question, I haven't found documentation on this and I don't know if it is possible. library(MASS) ## for fitdistr library(msm) ## for dtnorm #prepare truncated normal distribution dtnorm0 <- function(x, mean, sd , log = FALSE) { dtnorm(x, mean, sd, 105, 135, log) } set.seed(1) #Generate normal distribution with the TRUE population mean (day 106 of the

http://developer.apple.com/legacy/mac/library/documentation/Hardware/Develo= per_Notes/Macintosh_CPUs-G4/iMac_Sep03/03_Input-Output/q26bc_inout.html#//a= pple_ref/doc/uid/TP40000875-CH207-DontLinkElementID_14 Video Monitor Port The iMac computer has a port for an external video monitor and supports vid= eo mirroring mode. Video mirroring mode displays the same information on both monitors,

I am located in the UK, and I am using Sipura spa-2000 adapters to connect analog phones to a voip network. The network connects to the PSTN as well via the Sipura spa-3000 adapter. I would like to provide surge protection for the spa-2000 and the spa-3000 adapters. 1. For spa-2000, fxs port: What is the maximum tip-to-ring voltage before damage to the the adapter occurs? 2. For spa-2000,

I'm using the nls library to fit peaks in spectra. The model that I'm using is a quadratic background plus a Gaussian peak. The peak is well described by the Gaussian and the background is mostly linear with a bit of quadratic. My goal is an estimate of the integral (and the uncertainty of the integral) of the peak without the back ground. The procedure that I'm using is as

Ok... I asked a question a few months back about a 7960 that a user claims to be "shocking" her in her ear from time to time. A few others indicated they had similiar issues and alot of them seemed to stem from power over ethernet. Here's what we've done... We replaced the phone, ran two new cat5 cables to a different switch, put in a power brick and disabled power over

On 6/5/2015 1:33 PM, Michael Hennebry wrote: > It's a desktop in an old house. > The outlets have ground-fault protection, > but the third prong is ungrounded. > not sure how GFI would function at all without a valid ground, unless the GFI is wired to neutral, which is dangerous on its own. you might get a 3-prong-to-2-prong adapter and plug the PC into that, leaving the ground wire floating, and see if that works. As most desktops have the AC...

On Wed, May 24, 2017 10:45 am, Warren Young wrote: > On May 24, 2017, at 8:52 AM, Chris Adams <linux at cmadams.net> wrote: >> >> Once upon a time, Warren Young <warren at etr-usa.com> said: >>> a. It???s transmitting from a fixed location in a time zone you >>> probably aren???t in ??? US Mountain ??? being the least populous of >>> the lower

On Fri, Jun 05, 2015 at 12:30:16PM -0500, Michael Hennebry wrote: > On Fri, 5 Jun 2015, Frank Cox wrote: > > >On Fri, 5 Jun 2015 12:05:43 -0500 (CDT) > >Michael Hennebry wrote: > > > >>whether a microphone will introduce humming? > > > >Is it a 60 cycle hum? If so, it's probably induced by poor grounding. > > I suspect so. > Is that

-- GOOD NEWS! -- As ground transportation and the costs associated therewith are something of an issue. So, in the spirit of making AstriCon available I've contacted the hotel and arranged/discovered some low cost options: -- MARTA -- MARTA, the Atlanta mass-transit system (i.e. train) can get you there. Take MARTA from the airport north to the Brookhaven station. The hotel shuttle will

Has anyone used ground start on Asterisk? I am using a TE110P connected a Adtran 750 channel bank FXO card. It appears that Asterisk is not setting the CAS RBS bits properly to seize the line. I can see this with the zttool and the Adtran admin serial port status. I have configured the zaptel.conf and Zapata.conf to use fxsgs on those channels. Syed Akbar Alico Systems Inc www.alicosystems.com

I was wondering if there was a middle ground between POTS lines and a T1. I have a new office with a T1 line and while it's working well, it's a lot of money and we will never use anywhere near 23 lines at one time. Is it possible to get a few ISDN lines or something and bundle them together? Basically I would like to get the digital features of the T1 PRI (DID number, etc...) but

Anyone have recommendations for a gateway / ATA for business that can do GroundStart? Preferably with an rj-21 - but okay if not.. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20110614/42cbd90d/attachment.htm>