earthing sky dish

[mackers]

hi all
just been asked to price for earthing a communal sky system.

SKY have asked for a 4mm earth to be run back to the MET from there equipment.

there are 4 dishes positioned around the blocks of flats 2 storey high

there in no landlords db so where do they want me to connec t it?

anyone come across this before ?
never had much to do with tv's

cheers

 

[Strima]

Easy enough to install a MET, would have thought with that amount of flats there would have been a suitable earthing point near the incomer.

 

[jase]

no landlords?? is there any comunal lighting anywhere? or a meter cupboard?

 

[LukeBuckaz]

I have worked on loads of council flats and they seem to connect it to any old earth. just clipped down the wall no mechanical protection sod all!

 

[DurhamSparky]

Earth a SKY dish!!! heard it all now! oh well... just as bad as the TV Aerial i heard that got earthed!!

 

[Strima]

If they want them earthing then so be it. I would happily charge Sky a fortune to do this as they screw me on my packages!!!

 

[jase]

take it back to an earth rod

 

[DurhamSparky]

Agreed...!! lol...... i can only image its due to the "communal" distribution system, i.e Mrs Jones receiver goes ---- and dumps fault current down the coax feed and then as a result Mr Smith 6 flats along touches his receiver and BANG!

least its all safely distributed to earth and by then the broken RCD that never been tested on Mrs Jones CU jumps in to life!

 

[DurhamSparky]

take it back to an earth rod

then it would sit at a separate potential to the rest of the electrical system and earthing arrangements at the earth block..!!

thats just like saying earth the gas meter to a rod..!

 

[Ian B]

Where a Lightning Protection System exists then CAI code of practice requires a 4mm earth conductor from the dish and aerial mast to the MET. If there is no LPS then that connection is optional.
Aerial installers and satellite engineers - Confederation of Aerial Industries

If there are separate blocks, with a TV distribution system in each, but connected together (ie fed from a single antenna array/headend) then the distribution amplifier/splitter in each block should be connected to that blocks MET with a 4mm earth bond.
The coax's between buildings may need to be galvanically isolated, but the Aerial/Satellite installer should do that.

 

[Engineer54]

Where a Lightning Protection System exists then CAI code of practice requires a 4mm earth conductor from the dish and aerial mast to the MET. If there is no LPS then that connection is optional.

Does it?? Why would you connect a lightning system protected aerial to the Electrical MET?? There is or should be, a connection from the lightning protection system to the installations MET. But that would be a bit larger than a 4mm cable!!! lol!!!

 

[mackers]

thanks for imput lads,
been to another job today which had communal sky system so had a shuffty at that so sorted now
cheers

 

[mcauto]

take it back to an earth rod

i agree you cant go wrong with a rod or if the building has lighting protection tap it on

 

[Ian B]

Does it?? Why would you connect a lightning system protected aerial to the Electrical MET?? There is or should be, a connection from the lightning protection system to the installations MET. But that would be a bit larger than a 4mm cable!!! lol!!!

It does ;-)

The code requires a dish/mast to be connected to the MET if there is a Lightning Protection System present on the building, not necessarily connected to the dish/aerial.

In the case where a LPS is present it may be connected to the mast/dish as well, but that connection should be by the LPS designer/contractors.

In all cases the headend equipment must be connected to the MET in via a verifiable connection and the screen of the co-ax cables connecting to the headend/amplifier should be permanently bonded to it, such that if they are unplugged from the headend the earthing is retained.

HTH

 

[Engineer54]

It does ;-)

The code requires a dish/mast to be connected to the MET if there is a Lightning Protection System present on the building, not necessarily connected to the dish/aerial.

In the case where a LPS is present it may be connected to the mast/dish as well, but that connection should be by the LPS designer/contractors.

In all cases the headend equipment must be connected to the MET in via a verifiable connection and the screen of the co-ax cables connecting to the headend/amplifier should be permanently bonded to it, such that if they are unplugged from the headend the earthing is retained.

HTH

Sorry but that sounds total nonsense, as you have described it here to me!! Can you show me the codes you are referring too please??