Why are dishes not earthed | |
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26-04-2007
| #1 | ||
| Member Join Date: 12-02-2006 Location: Cyprus
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My System: 2.7m diah invacom 031 quad lnb pansonic 30 and Pace 460 boxes |
Here in Cyprus we have largish dishes and big thunderstorms. Why are dishes not separately bonded to earth for safety?  | ||
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26-04-2007
| #3 | ||
| Sky Remote Breaker...  Join Date: 05-01-2006 Location: Near Pendle Hill, Lancashire
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My System: Mostly gathering dust cos there's no room for dishes here... :( The Sleepy Hollow pollracle has spoken! | Don't forget you'd also have a nice big lightning conductor, the very reason why I won't ground my TV aerial cable even though there is a voltage float which can cause a nasty zap (probably my dodgy TV causing it!!!)...  | ||
| I think your car looks funny too...... Proud owner of a satellites.co.uk cap & T-Shirt... (though the latter no longer fits due to my ever expanding waistline!!!) Resident KIRBY Vacuum nut...  | |||
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26-04-2007
| #4 | ||
| Super Minty Mod  Join Date: 31-12-1999 Location: Fife, Scotland
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My System: 1200cc with 100,000,000,000 neurons and 100,000,000,000,000 connections | Even if the dish was earthed I doubt it would stop a direct hit frying whatever receiver was connected to the LNB. When radio aerials are grounded a direct hit on the aerial still causes the radio to burn out, just not as dramatically or extensively (in terms of connected equipment) than if it wasn't earthed. | ||
  'All you need is duck tape and WD40; if it moves and it shouldn't, use duck tape - if it should move and it doesn't, use WD40' | |||
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26-04-2007
| #5 | |||
| Sky Remote Breaker... Join Date: 05-01-2006 Location: Near Pendle Hill, Lancashire
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My System: Mostly gathering dust cos there's no room for dishes here... :( The Sleepy Hollow pollracle has spoken! |
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| I think your car looks funny too...... Proud owner of a satellites.co.uk cap & T-Shirt... (though the latter no longer fits due to my ever expanding waistline!!!) Resident KIRBY Vacuum nut... | ||||
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27-04-2007
| #6 | ||
| Former member  Join Date: 22-06-2005 Location: UK: Kent. Spain: Madrid.
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My System: Sky Plus V3 TDS 470n, Pace 2600CI, Thomson Sky HD, Technomate 1000D, Prodelin 1.8m dish + Invacom Quad C120, CM feed, Lacuna/Wolsey V3 meter | My system took a hit from lightning one week ago. I heard a loud crack inside the house. I had disconnected my Sky+, routers and computers. My Pace 2600 was still connected when the bolt struck. It survived, (Pace once told me that their boxes have some lightning protection) but the LNB did not. Only one polarity on one of the four outputs was working. There are four cables buried leading from the dish, about 25 metres. The dish mounting is earthed, as it is bolted into the ground. The dish is a fibreglass Prodelin. There are two earth terminals on a quad Invacom. Would it have made any difference had the LNB been earthed? | ||
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27-04-2007
| #7 | ||
| Super Minty Mod Join Date: 31-12-1999 Location: Fife, Scotland
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My System: 1200cc with 100,000,000,000 neurons and 100,000,000,000,000 connections | Are there signs of physical damage on the LNB? If not then it probably didn't take the hit, but instead was damaged by the effects of one nearby. As for the grounding, I'm not sure if that would have helped or not. | ||
| 'All you need is duck tape and WD40; if it moves and it shouldn't, use duck tape - if it should move and it doesn't, use WD40' | |||
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27-04-2007
| #8 | |||
| Sky Remote Breaker... Join Date: 05-01-2006 Location: Near Pendle Hill, Lancashire
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My System: Mostly gathering dust cos there's no room for dishes here... :( The Sleepy Hollow pollracle has spoken! |
As for the LNB, personally I wouldn't think it would make any difference if it was grounded, as if it was struck again it would probably get fried anyway, you'd probably have better luck setting up a lightning rod nearby and hope that it attracts any lightning away from your dish... | |||
| I think your car looks funny too...... Proud owner of a satellites.co.uk cap & T-Shirt... (though the latter no longer fits due to my ever expanding waistline!!!) Resident KIRBY Vacuum nut... | ||||
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27-04-2007
| #9 | ||
| Prince of Birthdays  Join Date: 28-09-2005 Location: Sweden
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My System: Dream7020 and AZ Elite | I think that it is the EMP that kills the lnbīs so no lightning rod in the world will help the lnb, but (perhaps) the reciever will survive I have a huge metallic construction just some 50 meters from my house. It is grounded and when there is a thunder close to it the bolt goes into that monster. Still, last time we had a hit it fried my new fancy telephone and that was the EMP | ||
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27-04-2007
| #10 | |||
| Sky Remote Breaker... Join Date: 05-01-2006 Location: Near Pendle Hill, Lancashire
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My System: Mostly gathering dust cos there's no room for dishes here... :( The Sleepy Hollow pollracle has spoken! |
I've replaced many computer parts (not my own, I always unplug during a storm) due to EMP caused by lightning, usually it's just the PSU's, but most cases it's also the modem (dialup usually, not sure how many people use them these days), it was only that Time PC I ever saw that had taken a direct strike through the phoneline... | |||
| I think your car looks funny too...... Proud owner of a satellites.co.uk cap & T-Shirt... (though the latter no longer fits due to my ever expanding waistline!!!) Resident KIRBY Vacuum nut... | ||||
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27-04-2007
| #11 | |||
| Amo Amas Amant Admin  Join Date: 18-11-2004 Location: Blackburn NW England (Siberia)
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My System: IDD CI24 ECONO MM Penta 1.20 Galaxy II 1.2Mtr Polar MTG yes it has been on the arc for 21 years and is still driven by a modified wiper motor from a Ford Anglia. It's like me sometimes groans but always performs  Saved us from the black plague of ignoratio elenchi, he awaits a special badge with jugs |
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27-04-2007
| #12 | |||
| Sky Remote Breaker... Join Date: 05-01-2006 Location: Near Pendle Hill, Lancashire
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My System: Mostly gathering dust cos there's no room for dishes here... :( The Sleepy Hollow pollracle has spoken! |
I nearly got the case (I wanted it just cos it had been lightning damaged) but at the last moment the customer wanted it back even though everything inside was dead...  | |||
| I think your car looks funny too...... Proud owner of a satellites.co.uk cap & T-Shirt... (though the latter no longer fits due to my ever expanding waistline!!!) Resident KIRBY Vacuum nut... | ||||
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27-04-2007
| #13 | ||
| Prince of Birthdays Join Date: 28-09-2005 Location: Sweden
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My System: Dream7020 and AZ Elite | About lightning Can U believe that there was this guy in the US playing with kites and keys during a thunder storm ? and that he did survive to tell others to try it Some did not make it We are talking BIG Amps here and some Volts as well. Take care next time, donīt stand under a tree or a metallic pole, stay inside away from the walls and the elextric outlets U never know when and how it will struck Thor is dangerus/ still / | ||
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27-04-2007
| #14 | |||
| Sky Remote Breaker... Join Date: 05-01-2006 Location: Near Pendle Hill, Lancashire
Posts: 4722
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Thanked 54 Times in 53 Posts
My System: Mostly gathering dust cos there's no room for dishes here... :( The Sleepy Hollow pollracle has spoken! |
I always usually cower in a corner of the house where there's no pipes or cables/sockets to discharge through me, but on occasion I do like to look out through an open skylight window (tha is assuming I have access to one!!!)... | |||
| I think your car looks funny too...... Proud owner of a satellites.co.uk cap & T-Shirt... (though the latter no longer fits due to my ever expanding waistline!!!) Resident KIRBY Vacuum nut... | ||||
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28-04-2007
| #15 | |||
| Regular Member Join Date: 02-10-2005 Location: Torbay(Ex-Benidorm)
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My System: Sigh-only Sky for now-Im back in the UK....... |
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28-04-2007
| #16 | |||
| Sky Remote Breaker... Join Date: 05-01-2006 Location: Near Pendle Hill, Lancashire
Posts: 4722
Thanks: 7
Thanked 54 Times in 53 Posts
My System: Mostly gathering dust cos there's no room for dishes here... :( The Sleepy Hollow pollracle has spoken! |
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| I think your car looks funny too...... Proud owner of a satellites.co.uk cap & T-Shirt... (though the latter no longer fits due to my ever expanding waistline!!!) Resident KIRBY Vacuum nut... | ||||
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29-04-2007
| #17 | |||
| Guest
Posts: n/a
| All my dishes are earthed my fixed dish on 28.2/28.5 east for Sky HD and my 1.2m andrews is earthed so is my uhf tv aerial and so will my 1.8m prodelin when i put it up. If a dish is not earthed along with the coax cable it is not installed correct,
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29-04-2007
| #18 | |||
| Guest
Posts: n/a
| Yes the lnb would have been ok if you did earth it, If some one else installed the dish for you you can claim a replacement lnb from them as the installation was not done correct, All lnb feeds cables should be eathed useing a ground block,
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| Last edited by Rd100; 25-10-2007 at 03:04 PM. | ||||
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29-04-2007
| #19 | |||
| Regular Member Join Date: 02-10-2005 Location: Torbay(Ex-Benidorm)
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My System: Sigh-only Sky for now-Im back in the UK....... |
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29-04-2007
| #20 | |||
| Sky Remote Breaker... Join Date: 05-01-2006 Location: Near Pendle Hill, Lancashire
Posts: 4722
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My System: Mostly gathering dust cos there's no room for dishes here... :( The Sleepy Hollow pollracle has spoken! |
I haven't got one myself actually, but then again, I don't have a phoneline at the moment, and my UPS's have surge protection built in (I think... ), so I'm OK if I'm not in during a storm (and I hope I'm not out during a storm either!!! ).... | |||
| I think your car looks funny too...... Proud owner of a satellites.co.uk cap & T-Shirt... (though the latter no longer fits due to my ever expanding waistline!!!) Resident KIRBY Vacuum nut... | ||||
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29-04-2007
| #21 | |||
| Believe it when I see it Admin.  Real name: Rolf Join Date: 01-05-1999 Location: Southern England
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Blog Entries: 5 My System: Sky+, DB 7000s, CubeRevo 3000HDPVR, Transparent 80cm Dish, Moteck SG2100 DiseqC motor, lots of legacy gear. Meters: Satlook Digital NIT, Televes H45 Spectrum analyser. |
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29-04-2007
| #22 | ||
| Sky Remote Breaker... Join Date: 05-01-2006 Location: Near Pendle Hill, Lancashire
Posts: 4722
Thanks: 7
Thanked 54 Times in 53 Posts
My System: Mostly gathering dust cos there's no room for dishes here... :( The Sleepy Hollow pollracle has spoken! | Wouldn't surprise me if sky suddenly deemed LNBs to be a consumable alongside the likes of batteries.... | ||
| I think your car looks funny too...... Proud owner of a satellites.co.uk cap & T-Shirt... (though the latter no longer fits due to my ever expanding waistline!!!) Resident KIRBY Vacuum nut... | |||
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29-04-2007
| #23 | ||
| Former member Join Date: 22-06-2005 Location: UK: Kent. Spain: Madrid.
Posts: 676
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My System: Sky Plus V3 TDS 470n, Pace 2600CI, Thomson Sky HD, Technomate 1000D, Prodelin 1.8m dish + Invacom Quad C120, CM feed, Lacuna/Wolsey V3 meter | With global warming, this kind of event is probably going to be more common. In the space of 10 months, from two lightning strikes near to the house, I've lost: A nearly- new Pace Sky+ Digibox An ADSL wireless router A quad Invacom LNB Two power supplies We are 3000 feet up in the mountains just outside Madrid, near the top of a hill. I am now taking this problem very seriously. I did the installation myself, and had not even thought about lightning before. My power supply to the digiboxes is now a UPS (Uninterruptible Power Supply). These come with surge protection for both telephone and power lines. I would recommend one of these to anyone in parts of Europe with unreliable electricity networks, or a weak Astra 2 north beam signal. When I came to replace the LNB, one of the cables was blackened near the F connector. I am still trying to work out where the main surge came from, either the ground or through the mains. the first strike was probably passed by the phone line, as it blew the router and the Sky+, which was connected to it. (I use VOIP for Sky box office) If the best opinion is to earth the cables and LNB, then I'll do it straight away, there are still storms about. | ||
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29-04-2007
| #24 | ||
| Super Minty Mod Join Date: 31-12-1999 Location: Fife, Scotland
Posts: 1591
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My System: 1200cc with 100,000,000,000 neurons and 100,000,000,000,000 connections | I agree with Rolf, I really don't see earthing the LNB as doing much to save it. Unplugging everything in a storm is the best option IMO, but not always practical I know, and won't do much for the poor LNB. Everything else is might reassure you and offer some protection, but don't count on it. UPSes aren't even that reliable with a direct hit to the power line, however but the makers might offer some insurance on damaged equipment connected to the UPS. | ||
| 'All you need is duck tape and WD40; if it moves and it shouldn't, use duck tape - if it should move and it doesn't, use WD40' | |||
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30-04-2007
| #25 | ||
| Prince of Birthdays Join Date: 28-09-2005 Location: Sweden
Posts: 3515
Thanks: 16
Thanked 118 Times in 105 Posts
My System: Dream7020 and AZ Elite | U canīt secure the LNBīs from the EMP (well, U can if U hide them inside a bottle covered with thin foil) So, U better pray next time Thor visits Your area | ||
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