-----Ursprüngliche Nachricht----- Von: David Christensen [mailto:dpchr...@holgerdanske.com] Gesendet: Mi 11/30/2011 02:59 An: debian-user@lists.debian.org Betreff: Re: [OT] Computer box as earth On 11/29/2011 03:57 PM, Mark Panen wrote: > On 30/11/2011 01:49, Arnt Karlsen wrote: > I have a router right next to my machine and have connected a data > surge arrestor, can i connect the earth of the surge arrestor to the > machine? > http://www.apc.com/resource/include/techspec_index.cfm?base_sku=pnet1gb
You should terminate the surge protector ground lead under the faceplate screw of a grounded receptacle. If you don't have a grounded receptacle, you need to hire an electrician to install one for you. HTH, David --- In Germany at least a bathtub should be grounded. If a concrete-footing ground electrode, the ground of the sockets etc. is ok can be measured with a special instrument that electricity providers should own. -----Ursprüngliche Nachricht----- Von: Scott Ferguson [mailto:prettyfly.producti...@gmail.com] Gesendet: Mi 11/30/2011 01:22 An: debian-user@lists.debian.org Betreff: Re: [OT] Computer box as earth Check with a local electrician --- + 1 For good reasons interfaces often use galvanic isolation. A MIDInterface does use opto-couplers and the cable's shielding is just single sided connected, the ADAT-Lightpipe has become a standard for music, a measuring bridge should be battery-powered etc., IOW it's not only a question if your computer case is grounded. Minus of circuits could be connected to ground, this could cause loops, so some people use ground lift switches, at home such a switch often disconnect from ground, if you sell equipment this is forbidden, than you need to decouple with a special capacitor. OTOH not connecting all devices to the same ground could lead in potential differences, e.g. grunded guitar strings could become very unpleasant, if you additionatley touch the case of a mixing console. FWIW such devices don't protect against lightning strokes. Lightning protection needs 2 prestages in addition to a Type 3 SPD. What information is given by it's user manual? - Ralf
