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Satellite TV receivers & systems support forums
Multi-receiver/TV systems - Domestic only
Earthing a Televez IRS System
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<blockquote data-quote="badgeroi" data-source="post: 687735" data-attributes="member: 349907"><p>I am new to this industry but have some experience as an electrician. I am working with a company installing Televez IRS Systems for local housing associations in the UK.</p><p></p><p>We are powering the system from a 240V communal lighting circuit in most cases through a spur with a 3A fuse protecting the power supply. The power supply has 240V in and 12V out.</p><p></p><p>All the 240v mains equipment is usually installed under the stairs or in an electric cupboard and a 4mm earth and single coax cable with the 12v feed run from there to where ever the mast and televez equipment is on the outside of the building.</p><p></p><p>Can someone please explain why a 12v system is earthed to the 240v supply. Surely this is a dangerous practice. Televison sets are double insulated so doesnt this cancel this type of protection as well????</p></blockquote><p></p>
[QUOTE="badgeroi, post: 687735, member: 349907"] I am new to this industry but have some experience as an electrician. I am working with a company installing Televez IRS Systems for local housing associations in the UK. We are powering the system from a 240V communal lighting circuit in most cases through a spur with a 3A fuse protecting the power supply. The power supply has 240V in and 12V out. All the 240v mains equipment is usually installed under the stairs or in an electric cupboard and a 4mm earth and single coax cable with the 12v feed run from there to where ever the mast and televez equipment is on the outside of the building. Can someone please explain why a 12v system is earthed to the 240v supply. Surely this is a dangerous practice. Televison sets are double insulated so doesnt this cancel this type of protection as well???? [/QUOTE]
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Satellite TV receivers & systems support forums
Multi-receiver/TV systems - Domestic only
Earthing a Televez IRS System
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