I'm considering using a (Triax 5 x 8) multiswitch to distribute TV/satellite
round the house.

I've read that multiswitches must be earthed directly back to the CU. But
I've also seen some comments that this isn't necessary for a normal domestic
installation where power to the building is supplied on a single phase -
which is my situation.

Can anyone give the current requirements? Thanks.

On Tue, 13 Jan 2009 15:25:04 -0000, Steve wrote:

I've read that multiswitches must be earthed directly back to the CU.
But I've also seen some comments that this isn't necessary for a normal
domestic installation where power to the building is supplied on a
single phase - which is my situation.

Is Bill Wright in here?

I'd bond all the screens at the multiswitch with the appropiate earthing
block. I may not take a proper bond from that all the way back to the CU
supply earth, just use the CPC of the multiswitch supply assuming that was
a direct feed from the CU or off a ring and fed with 2.5mm. If the
multiswitch supply was of the lighting circuit I'd not use that CPC, it's
lighter weight and not a ring.

--
Cheers
Dave.

In article ,
Steve wrote:
I'm considering using a (Triax 5 x 8) multiswitch to distribute
TV/satellite round the house.

I've read that multiswitches must be earthed directly back to the CU.
But I've also seen some comments that this isn't necessary for a normal
domestic installation where power to the building is supplied on a
single phase - which is my situation.

Can anyone give the current requirements? Thanks.

Pretty certain this is only for communal systems in blocks of flats, etc.

--
*We waste time, so you don't have to *

Dave Plowman London SW
To e-mail, change noise into sound.

Steve has brought this to us :
I'm considering using a (Triax 5 x 8) multiswitch to distribute TV/satellite
round the house.

I've read that multiswitches must be earthed directly back to the CU. But
I've also seen some comments that this isn't necessary for a normal domestic
installation where power to the building is supplied on a single phase -
which is my situation.

Can anyone give the current requirements? Thanks.

I would guess that earthing via the mains supply, from the socket it is
supplied from would be perfectly adequate for the purpose.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

On Tue, 13 Jan 2009 15:25:04 -0000 someone who may be "Steve"
wrote this:-

I'm considering using a (Triax 5 x 8) multiswitch to distribute TV/satellite
round the house.

Antiference have a good reputation, for example
http://www.tvaerials.com/product.aspx?productid=1925. See
http://www.antiference.tv/products/distribution for further
details.

I've read that multiswitches must be earthed directly back to the CU. But
I've also seen some comments that this isn't necessary for a normal domestic
installation where power to the building is supplied on a single phase -
which is my situation.

A television aerial connected to a lead which runs down the side of
a house and through a window frame to a socket or flying lead is a
somewhat different proposition to a distribution system with cables
snaking to most rooms in the house, various aerials/dishes and a
powered amplifier. There is also the question of what the situation
is when part of the distribution system is removed, particularly in
a block of flats.

In a block of flats the cables should be earthed. As well as
protecting occupants this also protects the distribution system
installer from dodgy wiring in flats. That means using an earthing
bar or something like http://www.antiference.tv/earthlink. Remove
the multiswitch, or other part of the system and earthing is still
provided.

In a single house the issue is less clear cut. I'm not convinced
earthing bars and the like are necessary, but proper earthing is.
There is usually an earthing terminal on the multiswitch. I largely
agree with the other posting on what this should be connected to.


--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54

Steve" wrote in message
...
I'm considering using a (Triax 5 x 8) multiswitch to distribute
TV/satellite round the house.

I've read that multiswitches must be earthed directly back to the CU. But
I've also seen some comments that this isn't necessary for a normal
domestic installation where power to the building is supplied on a single
phase - which is my situation.

Can anyone give the current requirements? Thanks.

Thanks chaps. I'll just use the mains CPC. Steve.