Constant noise on line

[Alarm]

Openreach are not resonsible for the first item , ie if your external wire comes through the wall straight into an nte5 and that nte5 goes faulty we are supposed to charge you for it as there is no reason for it to go faulty unless your house is damp or you have damaged it .

So why are we not supposed to touch it then? If it is our responsibility?

 

[bernardgreen]

nte5 goes faulty we are supposed to charge you for it as there is no reason for it to go faulty unless your house is damp or you have damaged it .

There are reasons for the NTE5 to "go faulty" and replacement of a faulty NTE5 is not (should not) be charged to the customer. Replacing a damaged NTE5 can be charged to the customer.

No one has asked what sort of noise is on the line. A persistant hum or a crackly noise ?

 

[tomy]

It is unlikely it is a hum as he has had the line tested and it was ok , hum is ussually caused by battery faults , not wet joints or hr faults .

 

[bernardgreen]

Why didn't the line test find the noise. Probably is was the automated loop test without any check for noise.

A "wet" connection from one or both legs (wires) of the loop to a hummy ground can introduce significant background hum onto the line.

Hummy ground is where the neutral of the electrical distrubtion network is connected to earth and phase un-balance currents are flowing to local earth close to the wet junction box. This means there is a difference in potential between earth at wet junction box and earth at the exchange which introduces hum onto the line.

 

[tomy]

If it was wet or had a path to earth it would have tested as earth fault or unbalanced line .

 

[simonpolly]

Earth faults are normally the culprit when you have humming noise on your line,disconnection faults generally result in a crackle on the line.The Rat line test will not pick up a noisy line when caused by a disconnection fault unless it goes off completely,the rat will normally pick up a earth fault if present at the time of testing but they have a habit of drying out temporally.I have replaced hundreds of spans of drop wire which test ok by the rat test but are putting noise on the line,there will soon be a new test system that will pick up hr dis faults on the initial rat test

 

[Infidel]

It could be a rectified low ir always a sod to find, how good are the new testers. 9083 with a decent set of clips and earth lead used to be the norm.