Electrical shock from satellite cable

McWotever

Hi there, anybody help out with this to save me paying a sky engineer?!

I built a house 18 months ago and have prewired rooms for TV. About 12 months ago I got Sky in. The set up is a Sky+ box (2 cables from LNB) which in turn has 1 RF output to a second TV with a magic eye. Absolutely no problem with that set up.

I also have one multi-room subscription. The setup there is the white standard box in an unused room with 1 input from LNB which has 1 RF output to the only television using that box (bedroom), which also has a magic eye. There is no television in the room where the box is located.

A few weeks ago I got an error 29 - no signal being received. Initially turning it off and back on had done the trick, but now that does not work. Today was my first chance to look at it. All cables still in position, including LNB.

But while disconnecting the LNB input to the box and the RF output I received a small shock, well tingle really. Disconnecting them from the box, but leaving the box plugged in, and putting my fingers across the input ports on the box causes no tingling. But handling the cables disconnected from the box but still connected to the wall sockets causes a shock (tingle).

So my conclusions so far are that the box is ok. The connections upstairs are ok when everything is connected.

So I'm at a bit of a loss to where this current/voltage is coming from. Anybody experience this before? Or have any ideas?

McW

Cantona's Collars

It's perfectly normal,a small amount of voltage passes between the box and the lnb,nothing to worry about.

McWotever

But even when the cables going to the LNB are disconnected from the box?

Vince Cable

It could be from unearthed equipment on the system if there are no appliances with earth connections.
You can earth the distribution system if you think it's an issue.

I stress the could be, I'm not an electrician.

kbell

The other box, if still connected to dish and powered on (even in stand by) will be passing voltage to the lnb,which is what you're feeling at the end of the cables you're touching.

Denethor

I was getting a unusally strong "shock" from one of the cables coming from my quad lnb recently only to discover water had seeped into the connection

Mexecutioner

kbell wrote: »

The other box, if still connected to dish and powered on (even in stand by) will be passing voltage to the lnb,which is what you're feeling at the end of the cables you're touching.

Is this from the LNB power supply or 'touch current' leakage?

kbell

Its the voltage thats coming from the other box that the op is feeling at the end of the cables in the room he is in, as the other box is powered up.
When working on any system i always recommend that boxes are powered off.
You can get an uncomfortable jolt when working on a LNB if the stb below is still powered on, more so if its raining and wet.

McWotever

My other box indeed was plugged in while I was disconnecting the cables, so I accept its more than likely that. Just have to discover now why I am suddenly getting an error 29 message on one box and not the other.

Fergio

It might only be low voltage, but if your getting shocked across both hand you are in more danger. You should be careful when breaking any circuit using both your hands, if you are holding metal parts in both, then you effectively become part of the circuit. Any current will travel across your heart, not a good thing to be doing on a regular basis.

It only takes maybe 50 milliamps or so to stop your heart. If you have a firm grip of metal in both hands, and its wet, anything more the 50 volts could potientially be mortal. In situations like that only use one hand! Preferably your right hand. The other thing to be worried about is that it might only be a small shock, but if your 30 feet up a ladder and it makes you jump, its the drop that will hurt. I almost slipped of a ladder doing exactly this.

Sorry cant help you with the error 29 message.

pelisor2000

only 18v .......:D

garrycann78

from other site

press services
press 4
quickly press 0, 1 and then select

this will give you the installer setup menu.

press 2
this will give you the default transponder menu. now, the frequency was wrong so all i had to do was press red to reset it