Home page of Satellite Internet and Information

Satellite Internet Forum.

Welcome, Guest.
Welcome to this satellite broadband discussion forum. Wherever you are and whatever your problem we are here to help each other. Connecting to the internet via satellite is not always easy but is critically important to those in remote places or with poor terrestrial infrastructure. Service providers and customers are encouraged to contribute. Register at the bottom of the forum home page if you wish to contribute or ask a question. VSAT service providers and satellite equipment sellers may feature their products free of charge; just register and get posting. Paid-for adverts, top left and top right, on all forum pages, are also available. Read the Forum rules.
      Home            Login            Register          
Pages: 1

Tooway-supplied earth cable disintegrated

(Read 3260 times)
Ex Member
Ex Member

Sep 4th, 2016 at 3:15pm  
Tooway supply a short length of earth cable to connect the TRIA to the dish assembly.  The customer in turn supplies their own earth cable to connect the dish assembly to ground.

After three years, the dish-to-ground connection in my installation is in good condition.  The TRIA-to-dish connection has completely disintegrated at the point where it attaches to the TRIA.

I only happened to notice it by chance.  Heaven knows how long I have been operating the link without any earthing at the TRIA.

Stripping back the tooway-supplied cable, the left hand snapshot attached shows how the copper strands have become powdery.  This is for a considerable length, up to one metre.

The right hand snapshot shows the remains of its original attachment to the TRIA, along with a replacement cable which I have now added.

Is this normal?
Back to top

earth.jpg (77 KB | 85 )
IP Logged
Ex Member
Ex Member

Reply #1 - Sep 8th, 2016 at 8:49am  
It happened me hundreds of times. Even in my house. 
In remote locations where I have one years with out coming back sure is disintegrated also.

I leave without wire.
Back to top
IP Logged
YaBB Administrator

Posts: 984
Reply #2 - Sep 12th, 2016 at 9:36am  

The white powder inside the Tooway supplied earthing cable is probably intentional. See if exists all along inside. It is probably chalk powder, talcum powder,  soapstone powder or an isocyanate compound powder whose purpose is to lubricate the wires so they slide within the sheath and relative to each other when the cable is flexed.

Powders may cause asthma and other lung problems, as well as irritation of the eyes, nose, throat, and skin, so take care.

Regarding breakage of the earth cable I suspect that the crimp is excessively tight. Are the tips of the wires pointed where they have been squeezed?

The reason for providing the earthing wire may be to comply with some regulation.  There are safety considerations with regards to lightning hazards and electric shock.

With regard to the operation of the Tooway TRIA it is the coax cable that matters. The connections of the copper centre pin and copper braid/sheath are critical.

Note that duplicating the coax braid path by adding external earth cables creates complex routes for DC current flows and external induced currents.  If you have a property with protective multiple earthing (PME) be aware that adding any real earth to the ground may provide a path to ground for the entire house or neighbourhood AC mains return in the event of neutral fault in the mains network. Taking advice from a local qualified electrician is the best I can suggest.

In my experience, if you have a real earth at the antenna be careful with the end of the cable (electric shock hazard). Check for zero volts between the cable outer and the real earth before holding. Use a length of wire to join the outers together to discharge any static or mains residual.   
Back to top
« Last Edit: Sep 12th, 2016 at 2:58pm by Admin1 »  
IP Logged
Pages: 1