Ernie Posted January 20, 2011 Share Posted January 20, 2011 Hi Guys, can you electronic whizzes tell me......Can I have a loudspeaker in my workshop connected to my computer in the house with a wire around 20m long? ernie Quote Link to comment Share on other sites More sharing options...
Steve W-O Posted January 20, 2011 Share Posted January 20, 2011 yes Quote Link to comment Share on other sites More sharing options...
Mogs Posted January 20, 2011 Share Posted January 20, 2011 It's a long way to go to turn the volume up and down. I've got my daughters cast off Radio/CD player. I take a cordless telephone handset wtih me, I get a call when meals are ready, Ive tried ringing Mrs Mogs when I want tea/coffee but this is usually this is met with " GET IT YOURSELF" Quote Link to comment Share on other sites More sharing options...
Terence Lynock Posted January 20, 2011 Share Posted January 20, 2011 I dont allow the missus in my workshop Ernie.......... Quote Link to comment Share on other sites More sharing options...
Steve Hargreaves - Moderator Posted January 20, 2011 Share Posted January 20, 2011 I have an old set of computer speakers that used to plug into the pooters sound card via a 3.5mm jack (they are seperately powered via the mains)...I plug this into my MP3 player which gives me about 2,000 tracks to flick through..... Quote Link to comment Share on other sites More sharing options...
Ernie Posted January 20, 2011 Author Share Posted January 20, 2011 Hi guys, thanks for all that I've got 25 m of wire all ready to go ernie ps whats a pooter...and whats MP3 Quote Link to comment Share on other sites More sharing options...
flytilbroke Posted January 20, 2011 Share Posted January 20, 2011 pooter... what electrons do when they spit. MP3,,,,, Muti Purpose treble. Quote Link to comment Share on other sites More sharing options...
r6dan Posted January 20, 2011 Share Posted January 20, 2011 MPEG-1 Audio Layer 3 is what MP3 stands for...It is a digital audioencodingand compression format,basically something to squash music filesmaking them very small. No 4 tracks andcassetteshere!!! Quote Link to comment Share on other sites More sharing options...
Barrie Dav 2 Posted January 21, 2011 Share Posted January 21, 2011 Ah! and I was thinking that 'pooter' was short for com-pooter. Quote Link to comment Share on other sites More sharing options...
Ernie Posted January 21, 2011 Author Share Posted January 21, 2011 I was thinking about that long nosed swiss aircraft ernie Quote Link to comment Share on other sites More sharing options...
Eck Posted January 21, 2011 Share Posted January 21, 2011 And of course the upgrade...the Turbo Pooter! Quote Link to comment Share on other sites More sharing options...
Ernie Posted January 21, 2011 Author Share Posted January 21, 2011 or the one with the klaxon...........the turbo hooter pooter ernie Quote Link to comment Share on other sites More sharing options...
Barrie Dav 2 Posted January 21, 2011 Share Posted January 21, 2011 Or the latest version ' The Super Dooper Turbo Hooter Pooter'......... Quote Link to comment Share on other sites More sharing options...
Steve Hargreaves - Moderator Posted January 21, 2011 Share Posted January 21, 2011 LOL..... Quote Link to comment Share on other sites More sharing options...
flytilbroke Posted January 21, 2011 Share Posted January 21, 2011 Ernie, please tell us off for being mischeviously off topic. Quote Link to comment Share on other sites More sharing options...
Andy Harris Posted January 22, 2011 Share Posted January 22, 2011 ... Actually the regulations say not.Although it would work technically you would need an isolation transformer at both ends to meet regulations.This is due to lighting strikes etc, where the potential of one building can be raised about the other. If your in the building then you rise and fall with the building, but the other building connected by a solid cable would not, hence the computer of speaker could rise relative to their building in a lighting strike.This is why phones and network connections have isolation transformers or fibre. Quote Link to comment Share on other sites More sharing options...
Hamish Posted January 22, 2011 Share Posted January 22, 2011 Really intrigued Andy. What regulations would they be and would it need to be Part P notified? Quote Link to comment Share on other sites More sharing options...
Ernie Posted January 22, 2011 Author Share Posted January 22, 2011 Hi guys Thanks for all this...You know, I came to France to get away from all these regulations ernie Quote Link to comment Share on other sites More sharing options...
Richard V-D Posted January 22, 2011 Share Posted January 22, 2011 Oh, you're in France! You can do want you like then, rules and regs don't seem to bother the French . Quote Link to comment Share on other sites More sharing options...
Ernie Posted January 22, 2011 Author Share Posted January 22, 2011 We just ignore them LIBERTY fraternity egalité and all that stuff ernie Quote Link to comment Share on other sites More sharing options...
Barrie Dav 2 Posted January 22, 2011 Share Posted January 22, 2011 Here in my part of France I see:- Liberty - yes. Fraternity - yes. - Egalité - errr........ Just like the UK actually................................ Quote Link to comment Share on other sites More sharing options...
Steve W-O Posted January 22, 2011 Share Posted January 22, 2011 Posted by Hamish McNab on 22/01/2011 08:50:57:Really intrigued Andy. What regulations would they be and would it need to be Part P notified?Yes, I am interested to know too. What about the mains connection? and the mains to a shed or separate garage? My phone connection comes direct from a junction box 300m away from the house, then runs all through the house before it gets to a phone/modem Quote Link to comment Share on other sites More sharing options...
Andy Harris Posted January 22, 2011 Share Posted January 22, 2011 @Hamish and Steve W-OI have a copy of the 17th Regs in the office, however I have a copy of the older 16th Regs here.There are many applicable sections, 130-04,541-542 for example.411-02-02.In principle one should not make a secondary connection to another building unless it is covered by the same earthing arrangements, or it is isolated. The guiding principle is where the fault currents might flow.We should remember that mostly our sheds require proper earthing arrangements.If we called these speakers portable appliances we could use a double insulated approach. Quote Link to comment Share on other sites More sharing options...
Steve W-O Posted January 22, 2011 Share Posted January 22, 2011 Posted by Andy Harris on 22/01/2011 16:57:17:@Hamish and Steve W-OI have a copy of the 17th Regs in the office, however I have a copy of the older 16th Regs here.There are many applicable sections, 130-04,541-542 for example.411-02-02.In principle one should not make a secondary connection to another building unless it is covered by the same earthing arrangements, or it is isolated. The guiding principle is where the fault currents might flow.We should remember that mostly our sheds require proper earthing arrangements.If we called these speakers portable appliances we could use a double insulated approach.I don't agree with your interpretation, ie the supply to my shed is connected via an earth leakage trip, and is earthed both through the armour of the cable, and the earth wire within that cable. That could be said to agree with your post above, but then your original disagreement with the speakers would not be consistent.We don't know how the power is connected to the OP's shed, so any comment on that is unfair. Maybe it is on a plug in extension, which changes the situation anyway.Lets rather hear how running a speaker extension, or audio line extension breaches the regulations as first stated Quote Link to comment Share on other sites More sharing options...
Andy Harris Posted January 22, 2011 Share Posted January 22, 2011 SteveIt depends on how you interpret the signal going to the speakers.If the signal is less that 50V between conductors or earth it is SELV. If it can go above 50V WRT earth in the shed then it falls under the regulations. If the cable is strung between the two buildings its an effective lightning conductor - definitely within the regulations.If we measure the resistance of the signal wires to ground and it is less than 3000ohms then it falls under the regulations. The output impedance of the PC amp should fall below this.If the power available between the conductors is enough to cause a spark then in falls under the regulations,Of course your shed meets the regulations. This is a pretty academic discussion until someone has to pass an installation. I would say that most professional electricians I work with would not be happy with this arrangement. Before your phone connection gets to a modem it should go through the BT master socket which contains an arrestor. The first part of the modem circuit will be a 2Kv isolation device. It is possible that the 17th regs have some relaxation from the 16th but I doubt it! Quote Link to comment Share on other sites More sharing options...
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