English Amiga Board

Go Back   English Amiga Board > Support > support.Hardware

Thread Tools
Old 09 October 2017, 14:06   #1
Registered User
Join Date: Oct 2005
Location: Olhao/Portugal
Age: 42
Posts: 45
A1200/500 PSU, to ground or not to ground...

So I'm putting back my Amigas to work again a bit and am in the process of replacing a plug on a good old A500 psu that I'm using in my A1200. The original plug did not have the ground connected though the wire is there and we all know the A1200/500 PSU connectors have ground.
So what are the (dis)advantages of connecting ground ? Are the A1200/500 double insulated ?
José is offline  
Old 10 October 2017, 01:48   #2
Registered User

Daedalus's Avatar
Join Date: Jun 2009
Location: Dublin, then Glasgow
Posts: 3,560
The computers themselves aren't double insulated, no. The power supplies should isolate the potentials the computer uses, but it's always a good idea to ground them. In the UK and other countries with a mandatory 3-pin plug, Amigas have their shield grounded all the time. It will work fine without it, but it probably helps reduce noise in the audio and video circuits, as well as protecting you in case anything in the PSU fails and lets mains electricity flow into the computer.
Daedalus is online now  
Old 10 October 2017, 03:44   #3
Registered User
Join Date: Sep 2007
Location: Stockholm
Posts: 3,718
I've never seen an ungrounded Amiga PSU. Is it some Portuguese problem?
idrougge is offline  
Old 10 October 2017, 13:49   #4
Registered User
Join Date: Mar 2004
Location: finland
Posts: 1,483
I think upto 90's ungrounded wall sockets were used here in dry rooms - so excluding kitchens, WCs, washrooms. So all Amigas were sold with ungrounded plugs. And the power supplies were surely double insulated.
zipper is online now  
Old 10 October 2017, 14:07   #5
Registered User

Daedalus's Avatar
Join Date: Jun 2009
Location: Dublin, then Glasgow
Posts: 3,560
Yep, the power supplies should be double insulated, but the ones I have anyway do not bear the standard double insulated mark. Also, any European Amiga PSUs I've seen were fitted with Schuko plugs, which do provide grounding contacts but also fit ungrounded sockets fine. US 110V PSUs I've seen also have grounded plugs. But of course there were many, many variants of power supply so it's quite possible there were different designs that I've not come across.

As for ungrounded sockets, even today they still seem to be relatively common in the US and some parts of Europe. Hotels I've been in in Spain and Portugal have both had a mixture of grounded and ungrounded outlets.
Daedalus is online now  

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Dead A1200 (+5V only 287Ohms against ground) Alen support.Hardware 6 04 June 2017 23:50
Amiga 500 PSU ref P.312503-03 singapore (Heavy PSU) dlfrsilver support.Hardware 14 27 August 2015 19:18
Amiga 500 PSU ref P.312503 WEST-GERMANY (Light PSU) dlfrsilver support.Hardware 0 18 November 2014 01:54
Repairing Amiga 500 PSU hese support.Hardware 11 12 January 2010 18:00
Deluxe Print and Donald Ducks Play Ground Dark_Trooper request.Old Rare Games 6 24 March 2006 10:17

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT +2. The time now is 18:59.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Page generated in 0.06513 seconds with 13 queries